aboutsummaryrefslogtreecommitdiffstats
path: root/gcc-4.9/gcc/configure.ac
blob: a871103ff57138876d32cf1deb9acdb844822219 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252
3253
3254
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274
3275
3276
3277
3278
3279
3280
3281
3282
3283
3284
3285
3286
3287
3288
3289
3290
3291
3292
3293
3294
3295
3296
3297
3298
3299
3300
3301
3302
3303
3304
3305
3306
3307
3308
3309
3310
3311
3312
3313
3314
3315
3316
3317
3318
3319
3320
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335
3336
3337
3338
3339
3340
3341
3342
3343
3344
3345
3346
3347
3348
3349
3350
3351
3352
3353
3354
3355
3356
3357
3358
3359
3360
3361
3362
3363
3364
3365
3366
3367
3368
3369
3370
3371
3372
3373
3374
3375
3376
3377
3378
3379
3380
3381
3382
3383
3384
3385
3386
3387
3388
3389
3390
3391
3392
3393
3394
3395
3396
3397
3398
3399
3400
3401
3402
3403
3404
3405
3406
3407
3408
3409
3410
3411
3412
3413
3414
3415
3416
3417
3418
3419
3420
3421
3422
3423
3424
3425
3426
3427
3428
3429
3430
3431
3432
3433
3434
3435
3436
3437
3438
3439
3440
3441
3442
3443
3444
3445
3446
3447
3448
3449
3450
3451
3452
3453
3454
3455
3456
3457
3458
3459
3460
3461
3462
3463
3464
3465
3466
3467
3468
3469
3470
3471
3472
3473
3474
3475
3476
3477
3478
3479
3480
3481
3482
3483
3484
3485
3486
3487
3488
3489
3490
3491
3492
3493
3494
3495
3496
3497
3498
3499
3500
3501
3502
3503
3504
3505
3506
3507
3508
3509
3510
3511
3512
3513
3514
3515
3516
3517
3518
3519
3520
3521
3522
3523
3524
3525
3526
3527
3528
3529
3530
3531
3532
3533
3534
3535
3536
3537
3538
3539
3540
3541
3542
3543
3544
3545
3546
3547
3548
3549
3550
3551
3552
3553
3554
3555
3556
3557
3558
3559
3560
3561
3562
3563
3564
3565
3566
3567
3568
3569
3570
3571
3572
3573
3574
3575
3576
3577
3578
3579
3580
3581
3582
3583
3584
3585
3586
3587
3588
3589
3590
3591
3592
3593
3594
3595
3596
3597
3598
3599
3600
3601
3602
3603
3604
3605
3606
3607
3608
3609
3610
3611
3612
3613
3614
3615
3616
3617
3618
3619
3620
3621
3622
3623
3624
3625
3626
3627
3628
3629
3630
3631
3632
3633
3634
3635
3636
3637
3638
3639
3640
3641
3642
3643
3644
3645
3646
3647
3648
3649
3650
3651
3652
3653
3654
3655
3656
3657
3658
3659
3660
3661
3662
3663
3664
3665
3666
3667
3668
3669
3670
3671
3672
3673
3674
3675
3676
3677
3678
3679
3680
3681
3682
3683
3684
3685
3686
3687
3688
3689
3690
3691
3692
3693
3694
3695
3696
3697
3698
3699
3700
3701
3702
3703
3704
3705
3706
3707
3708
3709
3710
3711
3712
3713
3714
3715
3716
3717
3718
3719
3720
3721
3722
3723
3724
3725
3726
3727
3728
3729
3730
3731
3732
3733
3734
3735
3736
3737
3738
3739
3740
3741
3742
3743
3744
3745
3746
3747
3748
3749
3750
3751
3752
3753
3754
3755
3756
3757
3758
3759
3760
3761
3762
3763
3764
3765
3766
3767
3768
3769
3770
3771
3772
3773
3774
3775
3776
3777
3778
3779
3780
3781
3782
3783
3784
3785
3786
3787
3788
3789
3790
3791
3792
3793
3794
3795
3796
3797
3798
3799
3800
3801
3802
3803
3804
3805
3806
3807
3808
3809
3810
3811
3812
3813
3814
3815
3816
3817
3818
3819
3820
3821
3822
3823
3824
3825
3826
3827
3828
3829
3830
3831
3832
3833
3834
3835
3836
3837
3838
3839
3840
3841
3842
3843
3844
3845
3846
3847
3848
3849
3850
3851
3852
3853
3854
3855
3856
3857
3858
3859
3860
3861
3862
3863
3864
3865
3866
3867
3868
3869
3870
3871
3872
3873
3874
3875
3876
3877
3878
3879
3880
3881
3882
3883
3884
3885
3886
3887
3888
3889
3890
3891
3892
3893
3894
3895
3896
3897
3898
3899
3900
3901
3902
3903
3904
3905
3906
3907
3908
3909
3910
3911
3912
3913
3914
3915
3916
3917
3918
3919
3920
3921
3922
3923
3924
3925
3926
3927
3928
3929
3930
3931
3932
3933
3934
3935
3936
3937
3938
3939
3940
3941
3942
3943
3944
3945
3946
3947
3948
3949
3950
3951
3952
3953
3954
3955
3956
3957
3958
3959
3960
3961
3962
3963
3964
3965
3966
3967
3968
3969
3970
3971
3972
3973
3974
3975
3976
3977
3978
3979
3980
3981
3982
3983
3984
3985
3986
3987
3988
3989
3990
3991
3992
3993
3994
3995
3996
3997
3998
3999
4000
4001
4002
4003
4004
4005
4006
4007
4008
4009
4010
4011
4012
4013
4014
4015
4016
4017
4018
4019
4020
4021
4022
4023
4024
4025
4026
4027
4028
4029
4030
4031
4032
4033
4034
4035
4036
4037
4038
4039
4040
4041
4042
4043
4044
4045
4046
4047
4048
4049
4050
4051
4052
4053
4054
4055
4056
4057
4058
4059
4060
4061
4062
4063
4064
4065
4066
4067
4068
4069
4070
4071
4072
4073
4074
4075
4076
4077
4078
4079
4080
4081
4082
4083
4084
4085
4086
4087
4088
4089
4090
4091
4092
4093
4094
4095
4096
4097
4098
4099
4100
4101
4102
4103
4104
4105
4106
4107
4108
4109
4110
4111
4112
4113
4114
4115
4116
4117
4118
4119
4120
4121
4122
4123
4124
4125
4126
4127
4128
4129
4130
4131
4132
4133
4134
4135
4136
4137
4138
4139
4140
4141
4142
4143
4144
4145
4146
4147
4148
4149
4150
4151
4152
4153
4154
4155
4156
4157
4158
4159
4160
4161
4162
4163
4164
4165
4166
4167
4168
4169
4170
4171
4172
4173
4174
4175
4176
4177
4178
4179
4180
4181
4182
4183
4184
4185
4186
4187
4188
4189
4190
4191
4192
4193
4194
4195
4196
4197
4198
4199
4200
4201
4202
4203
4204
4205
4206
4207
4208
4209
4210
4211
4212
4213
4214
4215
4216
4217
4218
4219
4220
4221
4222
4223
4224
4225
4226
4227
4228
4229
4230
4231
4232
4233
4234
4235
4236
4237
4238
4239
4240
4241
4242
4243
4244
4245
4246
4247
4248
4249
4250
4251
4252
4253
4254
4255
4256
4257
4258
4259
4260
4261
4262
4263
4264
4265
4266
4267
4268
4269
4270
4271
4272
4273
4274
4275
4276
4277
4278
4279
4280
4281
4282
4283
4284
4285
4286
4287
4288
4289
4290
4291
4292
4293
4294
4295
4296
4297
4298
4299
4300
4301
4302
4303
4304
4305
4306
4307
4308
4309
4310
4311
4312
4313
4314
4315
4316
4317
4318
4319
4320
4321
4322
4323
4324
4325
4326
4327
4328
4329
4330
4331
4332
4333
4334
4335
4336
4337
4338
4339
4340
4341
4342
4343
4344
4345
4346
4347
4348
4349
4350
4351
4352
4353
4354
4355
4356
4357
4358
4359
4360
4361
4362
4363
4364
4365
4366
4367
4368
4369
4370
4371
4372
4373
4374
4375
4376
4377
4378
4379
4380
4381
4382
4383
4384
4385
4386
4387
4388
4389
4390
4391
4392
4393
4394
4395
4396
4397
4398
4399
4400
4401
4402
4403
4404
4405
4406
4407
4408
4409
4410
4411
4412
4413
4414
4415
4416
4417
4418
4419
4420
4421
4422
4423
4424
4425
4426
4427
4428
4429
4430
4431
4432
4433
4434
4435
4436
4437
4438
4439
4440
4441
4442
4443
4444
4445
4446
4447
4448
4449
4450
4451
4452
4453
4454
4455
4456
4457
4458
4459
4460
4461
4462
4463
4464
4465
4466
4467
4468
4469
4470
4471
4472
4473
4474
4475
4476
4477
4478
4479
4480
4481
4482
4483
4484
4485
4486
4487
4488
4489
4490
4491
4492
4493
4494
4495
4496
4497
4498
4499
4500
4501
4502
4503
4504
4505
4506
4507
4508
4509
4510
4511
4512
4513
4514
4515
4516
4517
4518
4519
4520
4521
4522
4523
4524
4525
4526
4527
4528
4529
4530
4531
4532
4533
4534
4535
4536
4537
4538
4539
4540
4541
4542
4543
4544
4545
4546
4547
4548
4549
4550
4551
4552
4553
4554
4555
4556
4557
4558
4559
4560
4561
4562
4563
4564
4565
4566
4567
4568
4569
4570
4571
4572
4573
4574
4575
4576
4577
4578
4579
4580
4581
4582
4583
4584
4585
4586
4587
4588
4589
4590
4591
4592
4593
4594
4595
4596
4597
4598
4599
4600
4601
4602
4603
4604
4605
4606
4607
4608
4609
4610
4611
4612
4613
4614
4615
4616
4617
4618
4619
4620
4621
4622
4623
4624
4625
4626
4627
4628
4629
4630
4631
4632
4633
4634
4635
4636
4637
4638
4639
4640
4641
4642
4643
4644
4645
4646
4647
4648
4649
4650
4651
4652
4653
4654
4655
4656
4657
4658
4659
4660
4661
4662
4663
4664
4665
4666
4667
4668
4669
4670
4671
4672
4673
4674
4675
4676
4677
4678
4679
4680
4681
4682
4683
4684
4685
4686
4687
4688
4689
4690
4691
4692
4693
4694
4695
4696
4697
4698
4699
4700
4701
4702
4703
4704
4705
4706
4707
4708
4709
4710
4711
4712
4713
4714
4715
4716
4717
4718
4719
4720
4721
4722
4723
4724
4725
4726
4727
4728
4729
4730
4731
4732
4733
4734
4735
4736
4737
4738
4739
4740
4741
4742
4743
4744
4745
4746
4747
4748
4749
4750
4751
4752
4753
4754
4755
4756
4757
4758
4759
4760
4761
4762
4763
4764
4765
4766
4767
4768
4769
4770
4771
4772
4773
4774
4775
4776
4777
4778
4779
4780
4781
4782
4783
4784
4785
4786
4787
4788
4789
4790
4791
4792
4793
4794
4795
4796
4797
4798
4799
4800
4801
4802
4803
4804
4805
4806
4807
4808
4809
4810
4811
4812
4813
4814
4815
4816
4817
4818
4819
4820
4821
4822
4823
4824
4825
4826
4827
4828
4829
4830
4831
4832
4833
4834
4835
4836
4837
4838
4839
4840
4841
4842
4843
4844
4845
4846
4847
4848
4849
4850
4851
4852
4853
4854
4855
4856
4857
4858
4859
4860
4861
4862
4863
4864
4865
4866
4867
4868
4869
4870
4871
4872
4873
4874
4875
4876
4877
4878
4879
4880
4881
4882
4883
4884
4885
4886
4887
4888
4889
4890
4891
4892
4893
4894
4895
4896
4897
4898
4899
4900
4901
4902
4903
4904
4905
4906
4907
4908
4909
4910
4911
4912
4913
4914
4915
4916
4917
4918
4919
4920
4921
4922
4923
4924
4925
4926
4927
4928
4929
4930
4931
4932
4933
4934
4935
4936
4937
4938
4939
4940
4941
4942
4943
4944
4945
4946
4947
4948
4949
4950
4951
4952
4953
4954
4955
4956
4957
4958
4959
4960
4961
4962
4963
4964
4965
4966
4967
4968
4969
4970
4971
4972
4973
4974
4975
4976
4977
4978
4979
4980
4981
4982
4983
4984
4985
4986
4987
4988
4989
4990
4991
4992
4993
4994
4995
4996
4997
4998
4999
5000
5001
5002
5003
5004
5005
5006
5007
5008
5009
5010
5011
5012
5013
5014
5015
5016
5017
5018
5019
5020
5021
5022
5023
5024
5025
5026
5027
5028
5029
5030
5031
5032
5033
5034
5035
5036
5037
5038
5039
5040
5041
5042
5043
5044
5045
5046
5047
5048
5049
5050
5051
5052
5053
5054
5055
5056
5057
5058
5059
5060
5061
5062
5063
5064
5065
5066
5067
5068
5069
5070
5071
5072
5073
5074
5075
5076
5077
5078
5079
5080
5081
5082
5083
5084
5085
5086
5087
5088
5089
5090
5091
5092
5093
5094
5095
5096
5097
5098
5099
5100
5101
5102
5103
5104
5105
5106
5107
5108
5109
5110
5111
5112
5113
5114
5115
5116
5117
5118
5119
5120
5121
5122
5123
5124
5125
5126
5127
5128
5129
5130
5131
5132
5133
5134
5135
5136
5137
5138
5139
5140
5141
5142
5143
5144
5145
5146
5147
5148
5149
5150
5151
5152
5153
5154
5155
5156
5157
5158
5159
5160
5161
5162
5163
5164
5165
5166
5167
5168
5169
5170
5171
5172
5173
5174
5175
5176
5177
5178
5179
5180
5181
5182
5183
5184
5185
5186
5187
5188
5189
5190
5191
5192
5193
5194
5195
5196
5197
5198
5199
5200
5201
5202
5203
5204
5205
5206
5207
5208
5209
5210
5211
5212
5213
5214
5215
5216
5217
5218
5219
5220
5221
5222
5223
5224
5225
5226
5227
5228
5229
5230
5231
5232
5233
5234
5235
5236
5237
5238
5239
5240
5241
5242
5243
5244
5245
5246
5247
5248
5249
5250
5251
5252
5253
5254
5255
5256
5257
5258
5259
5260
5261
5262
5263
5264
5265
5266
5267
5268
5269
5270
5271
5272
5273
5274
5275
5276
5277
5278
5279
5280
5281
5282
5283
5284
5285
5286
5287
5288
5289
5290
5291
5292
5293
5294
5295
5296
5297
5298
5299
5300
5301
5302
5303
5304
5305
5306
5307
5308
5309
5310
5311
5312
5313
5314
5315
5316
5317
5318
5319
5320
5321
5322
5323
5324
5325
5326
5327
5328
5329
5330
5331
5332
5333
5334
5335
5336
5337
5338
5339
5340
5341
5342
5343
5344
5345
5346
5347
5348
5349
5350
5351
5352
5353
5354
5355
5356
5357
5358
5359
5360
5361
5362
5363
5364
5365
5366
5367
5368
5369
5370
5371
5372
5373
5374
5375
5376
5377
5378
5379
5380
5381
5382
5383
5384
5385
5386
5387
5388
5389
5390
5391
5392
5393
5394
5395
5396
5397
5398
5399
5400
5401
5402
5403
5404
5405
5406
5407
5408
5409
5410
5411
5412
5413
5414
5415
5416
5417
5418
5419
5420
5421
5422
5423
5424
5425
5426
5427
5428
5429
5430
5431
5432
5433
5434
5435
5436
5437
5438
5439
5440
5441
5442
5443
5444
5445
5446
5447
5448
5449
5450
5451
5452
5453
5454
5455
5456
5457
5458
5459
5460
5461
5462
5463
5464
5465
5466
5467
5468
5469
5470
5471
5472
5473
5474
5475
5476
5477
5478
5479
5480
5481
5482
5483
5484
5485
5486
5487
5488
5489
5490
5491
5492
5493
5494
5495
5496
5497
5498
5499
5500
5501
5502
5503
5504
5505
5506
5507
5508
5509
5510
5511
5512
5513
5514
5515
5516
5517
5518
5519
5520
5521
5522
5523
5524
5525
5526
5527
5528
5529
5530
5531
5532
5533
5534
5535
5536
5537
5538
5539
5540
5541
5542
5543
5544
5545
5546
5547
5548
5549
5550
5551
5552
5553
5554
5555
5556
5557
5558
5559
5560
5561
5562
5563
5564
5565
5566
5567
5568
5569
5570
5571
5572
5573
5574
5575
5576
5577
5578
5579
5580
5581
5582
5583
5584
5585
5586
5587
5588
5589
5590
5591
5592
5593
5594
5595
5596
5597
5598
5599
5600
5601
5602
5603
5604
5605
5606
5607
5608
5609
5610
5611
5612
5613
5614
5615
5616
5617
5618
5619
5620
5621
5622
5623
5624
5625
5626
5627
5628
5629
5630
5631
5632
5633
5634
5635
5636
5637
5638
5639
5640
5641
5642
5643
5644
5645
5646
5647
5648
5649
5650
5651
5652
5653
5654
5655
5656
5657
5658
5659
5660
5661
5662
5663
5664
5665
5666
5667
5668
5669
5670
5671
5672
5673
5674
5675
5676
5677
5678
5679
5680
5681
5682
5683
5684
5685
5686
5687
5688
5689
5690
5691
5692
5693
5694
5695
5696
5697
5698
5699
5700
5701
5702
5703
5704
5705
5706
5707
5708
5709
5710
5711
5712
5713
5714
5715
5716
5717
5718
5719
5720
5721
5722
5723
5724
5725
5726
5727
5728
5729
5730
5731
5732
5733
5734
5735
5736
5737
5738
5739
5740
5741
5742
5743
5744
5745
5746
5747
5748
5749
5750
5751
5752
5753
5754
5755
5756
5757
5758
5759
5760
5761
5762
5763
5764
5765
5766
5767
5768
5769
5770
5771
5772
5773
5774
5775
5776
5777
5778
5779
5780
5781
5782
5783
5784
5785
5786
5787
5788
5789
5790
5791
5792
5793
5794
5795
5796
5797
5798
5799
5800
5801
5802
5803
5804
5805
5806
5807
5808
5809
5810
5811
5812
5813
5814
5815
5816
5817
5818
5819
5820
5821
5822
5823
5824
5825
# configure.ac for GCC
# Process this file with autoconf to generate a configuration script.

# Copyright (C) 1997-2014 Free Software Foundation, Inc.

#This file is part of GCC.

#GCC is free software; you can redistribute it and/or modify it under
#the terms of the GNU General Public License as published by the Free
#Software Foundation; either version 3, or (at your option) any later
#version.

#GCC is distributed in the hope that it will be useful, but WITHOUT
#ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
#FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
#for more details.

#You should have received a copy of the GNU General Public License
#along with GCC; see the file COPYING3.  If not see
#<http://www.gnu.org/licenses/>.

# --------------------------------
# Initialization and sanity checks
# --------------------------------

AC_PREREQ(2.64)
AC_INIT
AC_CONFIG_SRCDIR(tree.c)
AC_CONFIG_HEADER(auto-host.h:config.in)

gcc_version=`cat $srcdir/BASE-VER`

# Determine the host, build, and target systems
AC_CANONICAL_BUILD
AC_CANONICAL_HOST
AC_CANONICAL_TARGET

# Determine the noncanonical target name, for directory use.
ACX_NONCANONICAL_TARGET

# Determine the target- and build-specific subdirectories
GCC_TOPLEV_SUBDIRS

# Set program_transform_name
AC_ARG_PROGRAM

# Check for bogus environment variables.
# Test if LIBRARY_PATH contains the notation for the current directory
# since this would lead to problems installing/building glibc.
# LIBRARY_PATH contains the current directory if one of the following
# is true:
# - one of the terminals (":" and ";") is the first or last sign
# - two terminals occur directly after each other
# - the path contains an element with a dot in it
AC_MSG_CHECKING(LIBRARY_PATH variable)
changequote(,)dnl
case ${LIBRARY_PATH} in
  [:\;]* | *[:\;] | *[:\;][:\;]* |  *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
    library_path_setting="contains current directory"
    ;;
  *)
    library_path_setting="ok"
    ;;
esac
changequote([,])dnl
AC_MSG_RESULT($library_path_setting)
if test "$library_path_setting" != "ok"; then
AC_MSG_ERROR([
*** LIBRARY_PATH shouldn't contain the current directory when
*** building gcc. Please change the environment variable
*** and run configure again.])
fi

# Test if GCC_EXEC_PREFIX contains the notation for the current directory
# since this would lead to problems installing/building glibc.
# GCC_EXEC_PREFIX contains the current directory if one of the following
# is true:
# - one of the terminals (":" and ";") is the first or last sign
# - two terminals occur directly after each other
# - the path contains an element with a dot in it
AC_MSG_CHECKING(GCC_EXEC_PREFIX variable)
changequote(,)dnl
case ${GCC_EXEC_PREFIX} in
  [:\;]* | *[:\;] | *[:\;][:\;]* |  *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
    gcc_exec_prefix_setting="contains current directory"
    ;;
  *)
    gcc_exec_prefix_setting="ok"
    ;;
esac
changequote([,])dnl
AC_MSG_RESULT($gcc_exec_prefix_setting)
if test "$gcc_exec_prefix_setting" != "ok"; then
AC_MSG_ERROR([
*** GCC_EXEC_PREFIX shouldn't contain the current directory when
*** building gcc. Please change the environment variable
*** and run configure again.])
fi

# -----------
# Directories
# -----------

# Specify the local prefix
local_prefix=
AC_ARG_WITH(local-prefix,
[AS_HELP_STRING([--with-local-prefix=DIR],
		[specifies directory to put local include])],
[case "${withval}" in
yes)	AC_MSG_ERROR(bad value ${withval} given for local include directory prefix) ;;
no)	;;
*)	local_prefix=$with_local_prefix ;;
esac])

# Default local prefix if it is empty
if test x$local_prefix = x; then
	local_prefix=/usr/local
fi

# Don't set gcc_gxx_include_dir to gxx_include_dir since that's only
# passed in by the toplevel make and thus we'd get different behavior
# depending on where we built the sources.
gcc_gxx_include_dir=
# Specify the g++ header file directory
AC_ARG_WITH(gxx-include-dir,
[AS_HELP_STRING([--with-gxx-include-dir=DIR],
                [specifies directory to put g++ header files])],
[case "${withval}" in
yes)	AC_MSG_ERROR(bad value ${withval} given for g++ include directory) ;;
no)	;;
*)	gcc_gxx_include_dir=$with_gxx_include_dir ;;
esac])

# This logic must match libstdc++-v3/acinclude.m4:GLIBCXX_EXPORT_INSTALL_INFO.
if test x${gcc_gxx_include_dir} = x; then
  if test x${enable_version_specific_runtime_libs} = xyes; then
    gcc_gxx_include_dir='${libsubdir}/include/c++'
  else
    libstdcxx_incdir='include/c++/$(version)'
    if test x$host != x$target; then
       libstdcxx_incdir="$target_alias/$libstdcxx_incdir"
    fi
    gcc_gxx_include_dir="\$(libsubdir)/\$(libsubdir_to_prefix)$libstdcxx_incdir"
  fi
fi

gcc_gxx_include_dir_add_sysroot=0
if test "${with_sysroot+set}" = set; then
  gcc_gxx_without_sysroot=`expr "${gcc_gxx_include_dir}" : "${with_sysroot}"'\(.*\)'`
  if test "${gcc_gxx_without_sysroot}"; then
    gcc_gxx_include_dir="${gcc_gxx_without_sysroot}"
    gcc_gxx_include_dir_add_sysroot=1
  fi
fi

AC_ARG_WITH(cpp_install_dir,
[AC_HELP_STRING([--with-cpp-install-dir=DIR],
                [install the user visible C preprocessor in DIR
                 (relative to PREFIX) as well as PREFIX/bin])],
[if test x$withval = xyes; then
  AC_MSG_ERROR([option --with-cpp-install-dir requires an argument])
elif test x$withval != xno; then
  cpp_install_dir=$withval
fi])

# We would like to our source tree to be readonly.  However when releases or
# pre-releases are generated, the flex/bison generated files as well as the 
# various formats of manuals need to be included along with the rest of the
# sources.  Therefore we have --enable-generated-files-in-srcdir to do 
# just that.

AC_MSG_CHECKING([whether to place generated files in the source directory])
  dnl generated-files-in-srcdir is disabled by default
  AC_ARG_ENABLE(generated-files-in-srcdir, 
    [AS_HELP_STRING([--enable-generated-files-in-srcdir],
		    [put copies of generated files in source dir
		     intended for creating source tarballs for users
		     without texinfo bison or flex])],
      generated_files_in_srcdir=$enableval,
      generated_files_in_srcdir=no)

AC_MSG_RESULT($generated_files_in_srcdir)

if test "$generated_files_in_srcdir" = "yes"; then
  GENINSRC=''
else
  GENINSRC='#'
fi
AC_SUBST(GENINSRC)

# -------------------
# Find default linker
# -------------------

# With GNU ld
AC_ARG_WITH(gnu-ld,
[AS_HELP_STRING([--with-gnu-ld], [arrange to work with GNU ld])],
gnu_ld_flag="$with_gnu_ld",
gnu_ld_flag=no)

# With pre-defined ld
AC_ARG_WITH(ld,
[AS_HELP_STRING([--with-ld], [arrange to use the specified ld (full pathname)])],
DEFAULT_LINKER="$with_ld")
if test x"${DEFAULT_LINKER+set}" = x"set"; then
  if test ! -x "$DEFAULT_LINKER"; then
    AC_MSG_ERROR([cannot execute: $DEFAULT_LINKER: check --with-ld or env. var. DEFAULT_LINKER])
  elif $DEFAULT_LINKER -v < /dev/null 2>&1 | grep GNU > /dev/null; then
    gnu_ld_flag=yes
  fi
  AC_DEFINE_UNQUOTED(DEFAULT_LINKER,"$DEFAULT_LINKER",
	[Define to enable the use of a default linker.])
fi

AC_MSG_CHECKING([whether a default linker was specified])
if test x"${DEFAULT_LINKER+set}" = x"set"; then
  if test x"$gnu_ld_flag" = x"no"; then
    AC_MSG_RESULT([yes ($DEFAULT_LINKER)])
  else
    AC_MSG_RESULT([yes ($DEFAULT_LINKER - GNU ld)])
  fi
else
  AC_MSG_RESULT(no)
fi

# With demangler in GNU ld
AC_ARG_WITH(demangler-in-ld,
[AS_HELP_STRING([--with-demangler-in-ld], [try to use demangler in GNU ld])],
demangler_in_ld="$with_demangler_in_ld",
demangler_in_ld=yes)

# ----------------------
# Find default assembler
# ----------------------

# With GNU as
AC_ARG_WITH(gnu-as,
[AS_HELP_STRING([--with-gnu-as], [arrange to work with GNU as])],
gas_flag="$with_gnu_as",
gas_flag=no)

AC_ARG_WITH(as,
[AS_HELP_STRING([--with-as], [arrange to use the specified as (full pathname)])],
DEFAULT_ASSEMBLER="$with_as")
if test x"${DEFAULT_ASSEMBLER+set}" = x"set"; then
  if test ! -x "$DEFAULT_ASSEMBLER"; then
    AC_MSG_ERROR([cannot execute: $DEFAULT_ASSEMBLER: check --with-as or env. var. DEFAULT_ASSEMBLER])
  elif $DEFAULT_ASSEMBLER -v < /dev/null 2>&1 | grep GNU > /dev/null; then
    gas_flag=yes
  fi
  AC_DEFINE_UNQUOTED(DEFAULT_ASSEMBLER,"$DEFAULT_ASSEMBLER",
	[Define to enable the use of a default assembler.])
fi

AC_MSG_CHECKING([whether a default assembler was specified])
if test x"${DEFAULT_ASSEMBLER+set}" = x"set"; then
  if test x"$gas_flag" = x"no"; then
    AC_MSG_RESULT([yes ($DEFAULT_ASSEMBLER)])
  else
    AC_MSG_RESULT([yes ($DEFAULT_ASSEMBLER - GNU as)])
  fi
else
  AC_MSG_RESULT(no)
fi

# ---------------
# Find C compiler
# ---------------

# If a non-executable a.out is present (e.g. created by GNU as above even if
# invoked with -v only), the IRIX 6 native ld just overwrites the existing
# file, even when creating an executable, so an execution test fails.
# Remove possible default executable files to avoid this.
#
# FIXME: This really belongs into AC_PROG_CC and can be removed once
# Autoconf includes it.
rm -f a.out a.exe b.out

# Find the native compiler
AC_PROG_CC
AC_PROG_CXX
ACX_PROG_GNAT([-I"$srcdir"/ada])

# Remove the -O2: for historical reasons, unless bootstrapping we prefer
# optimizations to be activated explicitly by the toplevel.
case "$CC" in
  */prev-gcc/xgcc*) ;;
  *) CFLAGS=`echo "$CFLAGS " | sed -e "s/-Ofast[[ 	]]//" -e "s/-O[[gs]][[ 	]]//" -e "s/-O[[0-9]]*[[ 	]]//" `
     CXXFLAGS=`echo "$CXXFLAGS " | sed -e "s/-Ofast[[ 	]]//" -e "s/-O[[gs]][[ 	]]//" -e "s/-O[[0-9]]*[[ 	]]//" ` ;;
esac
AC_SUBST(CFLAGS)
AC_SUBST(CXXFLAGS)

# Determine PICFLAG for target gnatlib.
GCC_PICFLAG_FOR_TARGET
AC_SUBST(PICFLAG_FOR_TARGET)

# -------------------------
# Check C compiler features
# -------------------------

AC_USE_SYSTEM_EXTENSIONS
AC_PROG_CPP
AC_C_INLINE

AC_SYS_LARGEFILE

# sizeof(char) is 1 by definition.
AC_CHECK_SIZEOF(void *)
AC_CHECK_SIZEOF(short)
AC_CHECK_SIZEOF(int)
AC_CHECK_SIZEOF(long)
AC_CHECK_TYPES([long long], [AC_CHECK_SIZEOF(long long)])
AC_CHECK_TYPES([__int64], [AC_CHECK_SIZEOF(__int64)])
GCC_STDINT_TYPES

# ---------------------
# Warnings and checking
# ---------------------

# Check $CC warning features (if it's GCC).
# We want to use -pedantic, but we don't want warnings about
# * 'long long'
# * variadic macros
# * overlong strings
# * C++11 narrowing conversions in { }
# So, we only use -pedantic if we can disable those warnings.

# In stage 1, disable -Wformat warnings from old GCCs about new % codes
AC_ARG_ENABLE(build-format-warnings,
  AS_HELP_STRING([--disable-build-format-warnings],[don't use -Wformat while building GCC]),
  [],[enable_build_format_warnings=yes])
AS_IF([test $enable_build_format_warnings = no],
      [wf_opt=-Wno-format],[wf_opt=])
ACX_PROG_CC_WARNING_OPTS(
	m4_quote(m4_do([-W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual $wf_opt])), [loose_warn])
ACX_PROG_CC_WARNING_OPTS(
	m4_quote(m4_do([-Wstrict-prototypes -Wmissing-prototypes])),
	[c_loose_warn])
ACX_PROG_CC_WARNING_OPTS(
	m4_quote(m4_do([-Wmissing-format-attribute])), [strict_warn])
ACX_PROG_CC_WARNING_OPTS(
	m4_quote(m4_do([-Wold-style-definition -Wc++-compat])), [c_strict_warn])
ACX_PROG_CC_WARNING_ALMOST_PEDANTIC(
	m4_quote(m4_do([-Wno-long-long -Wno-variadic-macros ], 
		       [-Wno-overlength-strings])), [strict_warn])
ACX_PROG_CC_WARNINGS_ARE_ERRORS([manual], [strict_warn])

# The above macros do nothing if the compiler is not GCC.  However, the
# Makefile has more goo to add other flags, so these variables are used
# to enable warnings only for GCC.
warn_cflags=
warn_cxxflags=
if test "x$GCC" = "xyes"; then
  warn_cflags='$(GCC_WARN_CFLAGS)'
  warn_cxxflags='$(GCC_WARN_CXXFLAGS)'
fi
AC_SUBST(warn_cflags)
AC_SUBST(warn_cxxflags)

# Disable exceptions and RTTI if building with g++
ACX_PROG_CC_WARNING_OPTS(
	m4_quote(m4_do([-fno-exceptions -fno-rtti -fasynchronous-unwind-tables])),
		       [noexception_flags])
	
# Enable expensive internal checks
is_release=
if test x"`cat $srcdir/DEV-PHASE`" != xexperimental; then
  is_release=yes
fi

AC_ARG_ENABLE(checking,
[AS_HELP_STRING([[--enable-checking[=LIST]]],
		[enable expensive run-time checks.  With LIST,
		 enable only specific categories of checks.
		 Categories are: yes,no,all,none,release.
		 Flags are: assert,df,fold,gc,gcac,gimple,misc,
		 rtlflag,rtl,runtime,tree,valgrind,types])],
[ac_checking_flags="${enableval}"],[
# Determine the default checks.
if test x$is_release = x ; then
  ac_checking_flags=yes
else
  ac_checking_flags=release
fi])
IFS="${IFS= 	}"; ac_save_IFS="$IFS"; IFS="$IFS,"
for check in release $ac_checking_flags
do
	case $check in
	# these set all the flags to specific states
	yes)		ac_assert_checking=1 ; ac_checking=1 ; ac_df_checking= ;
			ac_fold_checking= ; ac_gc_checking=1 ;
			ac_gc_always_collect= ; ac_gimple_checking=1 ; ac_rtl_checking= ;
			ac_rtlflag_checking=1 ; ac_runtime_checking=1 ;
			ac_tree_checking=1 ; ac_valgrind_checking= ;
			ac_types_checking=1 ;;
	no|none)	ac_assert_checking= ; ac_checking= ; ac_df_checking= ;
			ac_fold_checking= ; ac_gc_checking= ;
			ac_gc_always_collect= ; ac_gimple_checking= ; ac_rtl_checking= ;
			ac_rtlflag_checking= ; ac_runtime_checking= ;
			ac_tree_checking= ; ac_valgrind_checking= ;
			ac_types_checking= ;;
	all)		ac_assert_checking=1 ; ac_checking=1 ; ac_df_checking=1 ;
			ac_fold_checking=1 ; ac_gc_checking=1 ;
			ac_gc_always_collect=1 ; ac_gimple_checking=1 ; ac_rtl_checking=1 ;
			ac_rtlflag_checking=1 ; ac_runtime_checking=1 ;
			ac_tree_checking=1 ; ac_valgrind_checking= ;
			ac_types_checking=1 ;;
	release)	ac_assert_checking=1 ; ac_checking= ; ac_df_checking= ;
			ac_fold_checking= ; ac_gc_checking= ;
			ac_gc_always_collect= ; ac_gimple_checking= ; ac_rtl_checking= ;
			ac_rtlflag_checking= ; ac_runtime_checking=1 ;
			ac_tree_checking= ; ac_valgrind_checking= ;
			ac_types_checking= ;;
	# these enable particular checks
	assert) 	ac_assert_checking=1 ;;
	df)	 	ac_df_checking=1 ;;
	fold)		ac_fold_checking=1 ;;
	gc)		ac_gc_checking=1 ;;
	gcac)		ac_gc_always_collect=1 ;;
	gimple)		ac_gimple_checking=1 ;;
	misc)		ac_checking=1 ;;
	rtl)		ac_rtl_checking=1 ;;
	rtlflag)	ac_rtlflag_checking=1 ;;
	runtime)	ac_runtime_checking=1 ;;
	tree)		ac_tree_checking=1 ;;
	types)		ac_types_checking=1 ;;
	valgrind)	ac_valgrind_checking=1 ;;
	*)	AC_MSG_ERROR(unknown check category $check) ;;
	esac
done
IFS="$ac_save_IFS"

nocommon_flag=""
if test x$ac_checking != x ; then
  AC_DEFINE(ENABLE_CHECKING, 1,
[Define if you want more run-time sanity checks.  This one gets a grab
   bag of miscellaneous but relatively cheap checks.])
  nocommon_flag=-fno-common
fi
AC_SUBST(nocommon_flag)
if test x$ac_df_checking != x ; then
  AC_DEFINE(ENABLE_DF_CHECKING, 1,
[Define if you want more run-time sanity checks for dataflow.])
fi
if test x$ac_assert_checking != x ; then
  AC_DEFINE(ENABLE_ASSERT_CHECKING, 1,
[Define if you want assertions enabled.  This is a cheap check.])
fi
if test x$ac_gimple_checking != x ; then
  AC_DEFINE(ENABLE_GIMPLE_CHECKING, 1,
[Define if you want operations on GIMPLE (the basic data structure of
the high-level optimizers) to be checked for dynamic type safety at
runtime.  This is moderately expensive.])
fi
GCC_TARGET_TEMPLATE(ENABLE_RUNTIME_CHECKING)
if test x$ac_runtime_checking != x ; then
  AC_DEFINE(ENABLE_RUNTIME_CHECKING, 1,
[Define if you want runtime assertions enabled.  This is a cheap check.])
fi
if test x$ac_tree_checking != x ; then
  AC_DEFINE(ENABLE_TREE_CHECKING, 1,
[Define if you want all operations on trees (the basic data
   structure of the front ends) to be checked for dynamic type safety
   at runtime.  This is moderately expensive.  The tree browser debugging
   routines will also be enabled by this option.
   ])
  TREEBROWSER=tree-browser.o
  TREECHECKING=yes
fi
if test x$ac_types_checking != x ; then
  AC_DEFINE(ENABLE_TYPES_CHECKING, 1,
[Define if you want all gimple types to be verified after gimplifiation.
   This is cheap.
   ])
fi
AC_SUBST(TREEBROWSER)
AC_SUBST(TREECHECKING)
if test x$ac_rtl_checking != x ; then
  AC_DEFINE(ENABLE_RTL_CHECKING, 1,
[Define if you want all operations on RTL (the basic data structure
   of the optimizer and back end) to be checked for dynamic type safety
   at runtime.  This is quite expensive.])
fi
if test x$ac_rtlflag_checking != x ; then
  AC_DEFINE(ENABLE_RTL_FLAG_CHECKING, 1,
[Define if you want RTL flag accesses to be checked against the RTL
   codes that are supported for each access macro.  This is relatively
   cheap.])
fi
if test x$ac_gc_checking != x ; then
  AC_DEFINE(ENABLE_GC_CHECKING, 1,
[Define if you want the garbage collector to do object poisoning and
   other memory allocation checks.  This is quite expensive.])
fi
if test x$ac_gc_always_collect != x ; then
  AC_DEFINE(ENABLE_GC_ALWAYS_COLLECT, 1,
[Define if you want the garbage collector to operate in maximally
   paranoid mode, validating the entire heap and collecting garbage at
   every opportunity.  This is extremely expensive.])
fi
if test x$ac_fold_checking != x ; then
  AC_DEFINE(ENABLE_FOLD_CHECKING, 1,
[Define if you want fold checked that it never destructs its argument.
   This is quite expensive.])
fi
valgrind_path_defines=
valgrind_command=

dnl # This check AC_REQUIREs various stuff, so it *must not* be inside
dnl # an if statement.  This was the source of very frustrating bugs
dnl # in converting to autoconf 2.5x!
AC_CHECK_HEADER(valgrind.h, have_valgrind_h=yes, have_valgrind_h=no)

if test x$ac_valgrind_checking != x ; then
  # It is certainly possible that there's valgrind but no valgrind.h.
  # GCC relies on making annotations so we must have both.
  AC_MSG_CHECKING(for VALGRIND_DISCARD in <valgrind/memcheck.h>)
  AC_PREPROC_IFELSE([AC_LANG_SOURCE(
    [[#include <valgrind/memcheck.h>
#ifndef VALGRIND_DISCARD
#error VALGRIND_DISCARD not defined
#endif]])],
  [gcc_cv_header_valgrind_memcheck_h=yes],
  [gcc_cv_header_valgrind_memcheck_h=no])
  AC_MSG_RESULT($gcc_cv_header_valgrind_memcheck_h)
  AC_MSG_CHECKING(for VALGRIND_DISCARD in <memcheck.h>)
  AC_PREPROC_IFELSE([AC_LANG_SOURCE(
    [[#include <memcheck.h>
#ifndef VALGRIND_DISCARD
#error VALGRIND_DISCARD not defined
#endif]])],
  [gcc_cv_header_memcheck_h=yes],
  [gcc_cv_header_memcheck_h=no])
  AC_MSG_RESULT($gcc_cv_header_memcheck_h)
  AM_PATH_PROG_WITH_TEST(valgrind_path, valgrind,
	[$ac_dir/$ac_word --version | grep valgrind- >/dev/null 2>&1])
  if test "x$valgrind_path" = "x" \
    || (test $have_valgrind_h = no \
	&& test $gcc_cv_header_memcheck_h = no \
	&& test $gcc_cv_header_valgrind_memcheck_h = no); then
	AC_MSG_ERROR([*** Can't find both valgrind and valgrind/memcheck.h, memcheck.h or valgrind.h])
  fi
  valgrind_path_defines=-DVALGRIND_PATH='\"'$valgrind_path'\"'
  valgrind_command="$valgrind_path -q"
  AC_DEFINE(ENABLE_VALGRIND_CHECKING, 1,
[Define if you want to run subprograms and generated programs
   through valgrind (a memory checker).  This is extremely expensive.])
  if test $gcc_cv_header_valgrind_memcheck_h = yes; then
    AC_DEFINE(HAVE_VALGRIND_MEMCHECK_H, 1,
	[Define if valgrind's valgrind/memcheck.h header is installed.])
  fi
  if test $gcc_cv_header_memcheck_h = yes; then
    AC_DEFINE(HAVE_MEMCHECK_H, 1,
	[Define if valgrind's memcheck.h header is installed.])
  fi
fi
AC_SUBST(valgrind_path_defines)
AC_SUBST(valgrind_command)

# Enable code coverage collection
AC_ARG_ENABLE(coverage,
[AS_HELP_STRING([[--enable-coverage[=LEVEL]]],
		[enable compiler's code coverage collection.
		 Use to measure compiler performance and locate
		 unused parts of the compiler. With LEVEL, specify
		 optimization. Values are opt, noopt,
		 default is noopt])],
[case "${enableval}" in
  yes|noopt)
    coverage_flags="-fprofile-arcs -ftest-coverage -frandom-seed=\$@ -O0"
    ;;
  opt)
    coverage_flags="-fprofile-arcs -ftest-coverage -frandom-seed=\$@ -O2"
    ;;
  no)
    # a.k.a. --disable-coverage
    coverage_flags=""
    ;;
  *)
    AC_MSG_ERROR(unknown coverage setting $enableval)
    ;;
esac],
[coverage_flags=""])
AC_SUBST(coverage_flags)

AC_ARG_ENABLE(gather-detailed-mem-stats, 
[AS_HELP_STRING([--enable-gather-detailed-mem-stats],
		[enable detailed memory allocation stats gathering])], [],
[enable_gather_detailed_mem_stats=no])
gather_stats=`if test $enable_gather_detailed_mem_stats != no; then echo 1; else echo 0; fi`
AC_DEFINE_UNQUOTED(GATHER_STATISTICS, $gather_stats,
[Define to enable detailed memory allocation stats gathering.])

# -------------------------------
# Miscenalleous configure options
# -------------------------------

# With stabs
AC_ARG_WITH(stabs,
[AS_HELP_STRING([--with-stabs],
		[arrange to use stabs instead of host debug format])],
stabs="$with_stabs",
stabs=no)

# Determine whether or not multilibs are enabled.
AC_ARG_ENABLE(multilib,
[AS_HELP_STRING([--enable-multilib],
		[enable library support for multiple ABIs])],
[], [enable_multilib=yes])
AC_SUBST(enable_multilib)

# Determine whether or not multiarch is enabled.
AC_ARG_ENABLE(multiarch,
[AS_HELP_STRING([--enable-multiarch],
		[enable support for multiarch paths])],
[case "${enableval}" in
yes|no|auto) enable_multiarch=$enableval;;
*) AC_MSG_ERROR(bad value ${enableval} given for --enable-multiarch option) ;;
esac], [enable_multiarch=auto])
if test x${enable_multiarch} = xauto; then
  if test x${with_native_system_header_dir} != x; then
    ma_msg_suffix=", disabled auto check (configured with --native-system-header-dir)"
    enable_multiarch=no
  fi
  if test x$host != x$target && test "x$with_sysroot" = x; then
    ma_msg_suffix=", disabled auto check (cross build configured without --with-sysroot)"
    enable_multiarch=no
  fi
fi
AC_MSG_CHECKING(for multiarch configuration)
AC_SUBST(enable_multiarch)
AC_MSG_RESULT($enable_multiarch$ma_msg_suffix)

# needed for setting the multiarch name for soft-float/hard-float ABIs
AC_SUBST(with_cpu)
AC_SUBST(with_float)

# Enable __cxa_atexit for C++.
AC_ARG_ENABLE(__cxa_atexit,
[AS_HELP_STRING([--enable-__cxa_atexit], [enable __cxa_atexit for C++])],
[], [])

# Enable C extension for decimal float if target supports it.
GCC_AC_ENABLE_DECIMAL_FLOAT([$target])

dfp=`if test $enable_decimal_float != no; then echo 1; else echo 0; fi`
AC_DEFINE_UNQUOTED(ENABLE_DECIMAL_FLOAT, $dfp,
[Define to 1 to enable decimal float extension to C.])

# Use default_decimal_float for dependency.
enable_decimal_float=$default_decimal_float

bid=`if test $enable_decimal_float = bid; then echo 1; else echo 0; fi`
AC_DEFINE_UNQUOTED(ENABLE_DECIMAL_BID_FORMAT, $bid,
[Define to 1 to specify that we are using the BID decimal floating
point format instead of DPD])

# Enable C extension for fixed-point arithmetic.
AC_ARG_ENABLE(fixed-point,
[AS_HELP_STRING([--enable-fixed-point],
		[enable fixed-point arithmetic extension to C])],
[],
[
  case $target in
    arm*)
      enable_fixed_point=yes
      ;;

    mips*-*-*)
      enable_fixed_point=yes
      ;;
    *)
      AC_MSG_WARN([fixed-point is not supported for this target, ignored])
      enable_fixed_point=no
      ;;
  esac
])
AC_SUBST(enable_fixed_point)

fixedpoint=`if test $enable_fixed_point = yes; then echo 1; else echo 0; fi`
AC_DEFINE_UNQUOTED(ENABLE_FIXED_POINT, $fixedpoint,
[Define to 1 to enable fixed-point arithmetic extension to C.])

# Enable threads
# Pass with no value to take the default
# Pass with a value to specify a thread package
AC_ARG_ENABLE(threads,
[AS_HELP_STRING([[--enable-threads[=LIB]]],
		[enable thread usage for target GCC,
		 using LIB thread package])],,
[enable_threads=''])

AC_ARG_ENABLE(tls,
[AS_HELP_STRING([--enable-tls],
		[enable or disable generation of tls code
                 overriding the assembler check for tls support])],
[
  case $enable_tls in
    yes | no) ;;
    *) AC_MSG_ERROR(['$enable_tls' is an invalid value for --enable-tls.
Valid choices are 'yes' and 'no'.]) ;;
  esac
], [enable_tls=''])

AC_ARG_ENABLE(objc-gc,
[AS_HELP_STRING([--enable-objc-gc],
		[enable the use of Boehm's garbage collector with
		 the GNU Objective-C runtime])],
if test x$enable_objc_gc = xno; then
	objc_boehm_gc=''
else
	objc_boehm_gc=1
fi,
objc_boehm_gc='')

AC_ARG_WITH(dwarf2,
[AS_HELP_STRING([--with-dwarf2], [force the default debug format to be DWARF 2])],
dwarf2="$with_dwarf2",
dwarf2=no)

AC_ARG_ENABLE(shared,
[AS_HELP_STRING([--disable-shared], [don't provide a shared libgcc])],
[
  case $enable_shared in
  yes | no) ;;
  *)
    enable_shared=no
    IFS="${IFS= 	}"; ac_save_ifs="$IFS"; IFS="${IFS}:,"
    for pkg in $enableval; do
      if test "X$pkg" = "Xgcc" || test "X$pkg" = "Xlibgcc"; then
        enable_shared=yes
      fi
    done
    IFS="$ac_save_ifs"
    ;;
  esac
], [enable_shared=yes])
AC_SUBST(enable_shared)

AC_ARG_WITH([native-system-header-dir],
  [  --with-native-system-header-dir=dir
                          use dir as the directory to look for standard
                          system header files in.  Defaults to /usr/include.],
[
 case ${with_native_system_header_dir} in
 yes|no) AC_MSG_ERROR([bad value ${withval} given for --with-native-system-header-dir]) ;;
 /* | [[A-Za-z]]:[[\\/]]*) ;;
 *) AC_MSG_ERROR([--with-native-system-header-dir argument ${withval} must be an absolute directory]) ;;
 esac
 configured_native_system_header_dir="${withval}"
], [configured_native_system_header_dir=])

AC_ARG_WITH(build-sysroot, 
  [AS_HELP_STRING([--with-build-sysroot=sysroot],
                  [use sysroot as the system root during the build])],
  [if test x"$withval" != x ; then
     SYSROOT_CFLAGS_FOR_TARGET="--sysroot=$withval"
   fi],
  [SYSROOT_CFLAGS_FOR_TARGET=])
AC_SUBST(SYSROOT_CFLAGS_FOR_TARGET)

AC_ARG_WITH([runtime-root-prefix],
  [  --with-runtime-root-prefix=prefix
                          prepend prefix to paths used by the compiler to
                          name the dynamic linker and other files used at
                          runtime.  Defaults to empty (no prefix).],
[
 case ${with_runtime_root_prefix} in
 yes|no) AC_MSG_ERROR([bad value ${withval} given for runtime root prefix]) ;;
 /*) ;;
 *) AC_MSG_ERROR([${withval} should be an absolute directory]) ;;
 esac
 RUNTIME_ROOT_PREFIX_DEFINE="-DRUNTIME_ROOT_PREFIX=\\\"${withval}\\\""
], [RUNTIME_ROOT_PREFIX_DEFINE=""])
AC_SUBST(RUNTIME_ROOT_PREFIX_DEFINE)

if test "x$prefix" = xNONE; then
 test_prefix=/usr/local
else
 test_prefix=$prefix
fi
if test "x$exec_prefix" = xNONE; then
 test_exec_prefix=$test_prefix
else
 test_exec_prefix=$exec_prefix
fi

AC_ARG_WITH(sysroot,
[AS_HELP_STRING([[--with-sysroot[=DIR]]],
		[search for usr/lib, usr/include, et al, within DIR])],
[
 case ${with_sysroot} in
 yes) TARGET_SYSTEM_ROOT='${exec_prefix}/${target_noncanonical}/sys-root' ;;
 *) TARGET_SYSTEM_ROOT=$with_sysroot ;;
 esac
   
 TARGET_SYSTEM_ROOT_DEFINE='-DTARGET_SYSTEM_ROOT=\"$(TARGET_SYSTEM_ROOT)\"'
 CROSS_SYSTEM_HEADER_DIR='$(TARGET_SYSTEM_ROOT)$${sysroot_headers_suffix}$(NATIVE_SYSTEM_HEADER_DIR)'
	
 case ${TARGET_SYSTEM_ROOT} in
 "${test_prefix}"|"${test_prefix}/"*|\
 "${test_exec_prefix}"|"${test_exec_prefix}/"*|\
 '${prefix}'|'${prefix}/'*|\
 '${exec_prefix}'|'${exec_prefix}/'*)
   t="$TARGET_SYSTEM_ROOT_DEFINE -DTARGET_SYSTEM_ROOT_RELOCATABLE"
   TARGET_SYSTEM_ROOT_DEFINE="$t"
   ;;
 esac
], [
 TARGET_SYSTEM_ROOT=
 TARGET_SYSTEM_ROOT_DEFINE=
 CROSS_SYSTEM_HEADER_DIR='$(gcc_tooldir)/sys-include'
])
AC_SUBST(TARGET_SYSTEM_ROOT)
AC_SUBST(TARGET_SYSTEM_ROOT_DEFINE)
AC_SUBST(CROSS_SYSTEM_HEADER_DIR)

AC_ARG_WITH(specs,
  [AS_HELP_STRING([--with-specs=SPECS],
                  [add SPECS to driver command-line processing])],
  [CONFIGURE_SPECS=$withval],
  [CONFIGURE_SPECS=]
)
AC_SUBST(CONFIGURE_SPECS)

ACX_PKGVERSION([GCC])
ACX_BUGURL([http://gcc.gnu.org/bugs.html])

# Sanity check enable_languages in case someone does not run the toplevel
# configure # script.
AC_ARG_ENABLE(languages,
[AS_HELP_STRING([--enable-languages=LIST], [specify which front-ends to build])],
[case ,${enable_languages}, in
       ,,|,yes,)
		# go safe -- we cannot be much sure without the toplevel
		# configure's
		# analysis of which target libs are present and usable
		enable_languages=c
		;;
	 *,all,*)
		AC_MSG_ERROR([only the toplevel supports --enable-languages=all])
		;;
	*,c,*)
		;;
        *)
		enable_languages=c,${enable_languages}
		;;
esac],
[enable_languages=c])

AC_ARG_WITH(multilib-list,
[AS_HELP_STRING([--with-multilib-list], [select multilibs (AArch64, SH and x86-64 only)])],
:,
with_multilib_list=default)

# -------------------------
# Checks for other programs
# -------------------------

AC_PROG_MAKE_SET

# Find some useful tools
AC_PROG_AWK
# We need awk to create options.c and options.h.
# Bail out if it's missing.
case ${AWK} in
  "") AC_MSG_ERROR([can't build without awk, bailing out]) ;;
esac

gcc_AC_PROG_LN_S
ACX_PROG_LN($LN_S)
AC_PROG_RANLIB
ranlib_flags=""
AC_SUBST(ranlib_flags)
     
gcc_AC_PROG_INSTALL

# See if cmp has --ignore-initial.
gcc_AC_PROG_CMP_IGNORE_INITIAL

# See if we have the mktemp command.
AC_CHECK_PROG(have_mktemp_command, mktemp, yes, no)

# See if makeinfo has been installed and is modern enough
# that we can use it.
ACX_CHECK_PROG_VER(MAKEINFO, makeinfo, --version,
  [GNU texinfo.* \([0-9][0-9.]*\)],
  [4.[7-9]*|4.[1-9][0-9]*|[5-9]*|[1-9][0-9]*])
if test $gcc_cv_prog_makeinfo_modern = no; then
  AC_MSG_WARN([
*** Makeinfo is missing or too old.
*** Info documentation will not be built.])
  BUILD_INFO=
else
  BUILD_INFO=info
fi
AC_SUBST(BUILD_INFO)

# Is pod2man recent enough to regenerate manpages?
AC_MSG_CHECKING([for recent Pod::Man])
if (perl -e 'use 1.10 Pod::Man') >/dev/null 2>&1; then
  AC_MSG_RESULT(yes)
  GENERATED_MANPAGES=generated-manpages
else
  AC_MSG_RESULT(no)
  GENERATED_MANPAGES=
fi
AC_SUBST(GENERATED_MANPAGES)

MISSING="${CONFIG_SHELL-/bin/sh} $ac_aux_dir/missing"

# How about lex?
dnl Don't use AC_PROG_LEX; we insist on flex.
dnl LEXLIB is not useful in gcc.
AC_CHECK_PROGS([FLEX], flex, [$MISSING flex])

# Bison?
AC_CHECK_PROGS([BISON], bison, [$MISSING bison])

# Binutils are not build modules, unlike bison/flex/makeinfo.  So we
# check for build == host before using them.

# NM
if test x${build} = x${host} && test -f $srcdir/../binutils/nm.c \
  && test -d ../binutils ; then
  NM='${objdir}/../binutils/nm-new'
else
  AC_CHECK_PROG(NM, nm, nm, ${CONFIG_SHELL-/bin/sh} ${srcdir}/../missing nm)
fi

# AR
if test x${build} = x${host} && test -f $srcdir/../binutils/ar.c \
  && test -d ../binutils ; then
  AR='${objdir}/../binutils/ar'
else
  AC_CHECK_PROG(AR, ar, ar, ${CONFIG_SHELL-/bin/sh} ${srcdir}/../missing ar)
fi


# --------------------
# Checks for C headers
# --------------------

# Need to reject headers which give warnings, so that the -Werror bootstrap
# works later. *sigh*  This needs to come before all header checks.
AC_PROG_CPP_WERROR

AC_HEADER_STDC
AC_HEADER_TIME
ACX_HEADER_STRING
AC_HEADER_SYS_WAIT
AC_HEADER_TIOCGWINSZ
AC_CHECK_HEADERS(limits.h stddef.h string.h strings.h stdlib.h time.h iconv.h \
		 fcntl.h unistd.h sys/file.h sys/time.h sys/mman.h \
		 sys/resource.h sys/param.h sys/times.h sys/stat.h \
		 direct.h malloc.h langinfo.h ldfcn.h locale.h wchar.h)

# Check for thread headers.
AC_CHECK_HEADER(thread.h, [have_thread_h=yes], [have_thread_h=])
AC_CHECK_HEADER(pthread.h, [have_pthread_h=yes], [have_pthread_h=])

# These tests can't be done till we know if we have limits.h.
gcc_AC_C_CHAR_BIT
AC_C_BIGENDIAN

# ----------------------
# Checks for C++ headers
# ----------------------

dnl Autoconf will give an error in the configure script if there is no
dnl C++ preprocessor.  Hack to prevent that.
m4_pushdef([AC_MSG_ERROR], m4_defn([AC_MSG_WARN]))[]dnl
AC_PROG_CXXCPP
m4_popdef([AC_MSG_ERROR])[]dnl

AC_LANG_PUSH(C++)

AC_CHECK_HEADERS(unordered_map)
AC_CHECK_HEADERS(tr1/unordered_map)
AC_CHECK_HEADERS(ext/hash_map)

AC_LANG_POP(C++)

# --------
# Dependency checking.
# --------

AC_LANG_PUSH(C++)
ZW_CREATE_DEPDIR
AC_CONFIG_COMMANDS([gccdepdir],[
  ${CONFIG_SHELL-/bin/sh} $ac_aux_dir/mkinstalldirs build/$DEPDIR
  for lang in $subdirs c-family common
  do
      ${CONFIG_SHELL-/bin/sh} $ac_aux_dir/mkinstalldirs $lang/$DEPDIR
  done], [subdirs="$subdirs" ac_aux_dir=$ac_aux_dir DEPDIR=$DEPDIR])

ZW_PROG_COMPILER_DEPENDENCIES([CXX])
AC_LANG_POP(C++)

# --------
# UNSORTED
# --------


# These libraries may be used by collect2.
# We may need a special search path to get them linked.
AC_CACHE_CHECK(for collect2 libraries, gcc_cv_collect2_libs,
[save_LIBS="$LIBS"
for libs in '' -lld -lmld \
		'-L/usr/lib/cmplrs/cc2.11 -lmld' \
		'-L/usr/lib/cmplrs/cc3.11 -lmld'
do
	LIBS="$libs"
	AC_TRY_LINK_FUNC(ldopen,
		[gcc_cv_collect2_libs="$libs"; break])
done
LIBS="$save_LIBS"
test -z "$gcc_cv_collect2_libs" && gcc_cv_collect2_libs='none required'])
case $gcc_cv_collect2_libs in
	"none required")	;;
	*)	COLLECT2_LIBS=$gcc_cv_collect2_libs ;;
esac
AC_SUBST(COLLECT2_LIBS)

# When building Ada code on Alpha, we need exc_resume which is usually in
# -lexc.  So test for it.
save_LIBS="$LIBS"
LIBS=
AC_SEARCH_LIBS(exc_resume, exc)
GNAT_LIBEXC="$LIBS"
LIBS="$save_LIBS"
AC_SUBST(GNAT_LIBEXC)

# To support -mcpu=native on Solaris/SPARC, we need libkstat.
save_LIBS="$LIBS"
LIBS=
AC_SEARCH_LIBS(kstat_open, kstat)
EXTRA_GCC_LIBS="$LIBS"
LIBS="$save_LIBS"
AC_SUBST(EXTRA_GCC_LIBS)

# Some systems put ldexp and frexp in libm instead of libc; assume
# they're both in the same place.  jcf-dump needs them.
save_LIBS="$LIBS"
LIBS=
AC_SEARCH_LIBS(ldexp, m)
LDEXP_LIB="$LIBS"
LIBS="$save_LIBS"
AC_SUBST(LDEXP_LIB)

# Use <inttypes.h> only if it exists,
# doesn't clash with <sys/types.h>, and declares intmax_t.
AC_MSG_CHECKING(for inttypes.h)
AC_CACHE_VAL(gcc_cv_header_inttypes_h,
[AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
[[#include <sys/types.h>
#include <inttypes.h>]],
  [[intmax_t i = -1;]])],
  [gcc_cv_header_inttypes_h=yes],
  [gcc_cv_header_inttypes_h=no])])
AC_MSG_RESULT($gcc_cv_header_inttypes_h)
if test $gcc_cv_header_inttypes_h = yes; then
  AC_DEFINE(HAVE_INTTYPES_H, 1,
	[Define if you have a working <inttypes.h> header file.])
fi

dnl Disabled until we have a complete test for buggy enum bitfields.
dnl gcc_AC_C_ENUM_BF_UNSIGNED

define(gcc_UNLOCKED_FUNCS, clearerr_unlocked feof_unlocked dnl
  ferror_unlocked fflush_unlocked fgetc_unlocked fgets_unlocked dnl
  fileno_unlocked fprintf_unlocked fputc_unlocked fputs_unlocked dnl
  fread_unlocked fwrite_unlocked getchar_unlocked getc_unlocked dnl
  putchar_unlocked putc_unlocked)
AC_CHECK_FUNCS(times clock kill getrlimit setrlimit atoll atoq \
	sysconf strsignal getrusage nl_langinfo \
	gettimeofday mbstowcs wcswidth mmap setlocale \
	gcc_UNLOCKED_FUNCS madvise)

if test x$ac_cv_func_mbstowcs = xyes; then
  AC_CACHE_CHECK(whether mbstowcs works, gcc_cv_func_mbstowcs_works,
[    AC_RUN_IFELSE([AC_LANG_SOURCE([[#include <stdlib.h>
int main()
{
  mbstowcs(0, "", 0);
  return 0;
}]])],
    [gcc_cv_func_mbstowcs_works=yes],
    [gcc_cv_func_mbstowcs_works=no],
    [gcc_cv_func_mbstowcs_works=yes])])
  if test x$gcc_cv_func_mbstowcs_works = xyes; then
    AC_DEFINE(HAVE_WORKING_MBSTOWCS, 1,
  [Define this macro if mbstowcs does not crash when its
   first argument is NULL.])
  fi
fi

AC_CHECK_TYPE(ssize_t, int)
AC_CHECK_TYPE(caddr_t, char *)

GCC_AC_FUNC_MMAP_BLACKLIST

case "${host}" in
*-*-*vms*)
  # Under VMS, vfork works very differently than on Unix. The standard test 
  # won't work, and it isn't easily adaptable. It makes more sense to
  # just force it.
  ac_cv_func_vfork_works=yes
  ;;
esac
AC_FUNC_FORK

# g++ on Solaris 10+ defines _XOPEN_SOURCE=600, which exposes a different
# iconv() prototype.
AC_LANG_PUSH([C++])
AM_ICONV
AC_LANG_POP([C++])

# Until we have in-tree GNU iconv:
LIBICONV_DEP=
AC_SUBST(LIBICONV_DEP)

AM_LC_MESSAGES

AM_LANGINFO_CODESET

# We will need to find libiberty.h and ansidecl.h
saved_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -I${srcdir} -I${srcdir}/../include $GMPINC"
saved_CXXFLAGS="$CXXFLAGS"
CXXFLAGS="$CXXFLAGS -I${srcdir} -I${srcdir}/../include $GMPINC"
gcc_AC_CHECK_DECLS(getenv atol asprintf sbrk abort atof getcwd getwd \
	strsignal strstr stpcpy strverscmp \
	errno snprintf vsnprintf vasprintf malloc realloc calloc \
	free basename getopt clock getpagesize ffs gcc_UNLOCKED_FUNCS, , ,[
#include "ansidecl.h"
#include "system.h"])

gcc_AC_CHECK_DECLS(getrlimit setrlimit getrusage, , ,[
#include "ansidecl.h"
#include "system.h"
#ifdef HAVE_SYS_RESOURCE_H
#include <sys/resource.h>
#endif
])

AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include "ansidecl.h"
#include "system.h"
#ifdef HAVE_SYS_RESOURCE_H
#include <sys/resource.h>
#endif
]], [[rlim_t l = 0;]])],[],[AC_DEFINE([rlim_t],[long],
[Define to `long' if <sys/resource.h> doesn't define.])])

# On AIX 5.2, <ldfcn.h> conflicts with <fcntl.h>, as both define incompatible
# FREAD and FWRITE macros.  Fortunately, for GCC's single usage of ldgetname
# in collect2.c, <fcntl.h> isn't visible, but the configure test below needs
# to undef these macros to get the correct value for HAVE_DECL_LDGETNAME.
gcc_AC_CHECK_DECLS(ldgetname, , ,[
#include "ansidecl.h"
#include "system.h"
#ifdef HAVE_LDFCN_H
#undef FREAD
#undef FWRITE
#include <ldfcn.h>
#endif
])

gcc_AC_CHECK_DECLS(times, , ,[
#include "ansidecl.h"
#include "system.h"
#ifdef HAVE_SYS_TIMES_H
#include <sys/times.h>
#endif
])

gcc_AC_CHECK_DECLS(sigaltstack, , ,[
#include "ansidecl.h"
#include "system.h"
#include <signal.h>
])

# g++ on Solaris 10+ defines _XOPEN_SOURCE=600, which hides the madvise()
# prototype.
AC_LANG_PUSH([C++])
gcc_AC_CHECK_DECLS(madvise, , ,[
  #include "ansidecl.h"
  #include "system.h"
])
AC_LANG_POP([C++])

# More time-related stuff.
AC_CACHE_CHECK(for struct tms, ac_cv_struct_tms, [
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include "ansidecl.h"
#include "system.h"
#ifdef HAVE_SYS_TIMES_H
#include <sys/times.h>
#endif
]], [[struct tms tms;]])],[ac_cv_struct_tms=yes],[ac_cv_struct_tms=no])])
if test $ac_cv_struct_tms = yes; then
  AC_DEFINE(HAVE_STRUCT_TMS, 1,
  [Define if <sys/times.h> defines struct tms.])
fi

# use gcc_cv_* here because this doesn't match the behavior of AC_CHECK_TYPE.
# revisit after autoconf 2.50.
AC_CACHE_CHECK(for clock_t, gcc_cv_type_clock_t, [
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include "ansidecl.h"
#include "system.h"
]], [[clock_t x;]])],[gcc_cv_type_clock_t=yes],[gcc_cv_type_clock_t=no])])
if test $gcc_cv_type_clock_t = yes; then
  AC_DEFINE(HAVE_CLOCK_T, 1,
  [Define if <time.h> defines clock_t.])
fi

# Check if F_SETLKW is supported by fcntl.
AC_CACHE_CHECK(for F_SETLKW, ac_cv_f_setlkw, [
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <fcntl.h>]], [[
struct flock fl;
fl.l_whence = 0;
fl.l_start = 0;
fl.l_len = 0;
fl.l_pid = 0;
return fcntl (1, F_SETLKW, &fl);]])],
[ac_cv_f_setlkw=yes],[ac_cv_f_setlkw=no])])
if test $ac_cv_f_setlkw = yes; then
  AC_DEFINE(HOST_HAS_F_SETLKW, 1,
  [Define if F_SETLKW supported by fcntl.])
fi

# Restore CFLAGS, CXXFLAGS from before the gcc_AC_NEED_DECLARATIONS tests.
CFLAGS="$saved_CFLAGS"
CXXFLAGS="$saved_CXXFLAGS"

# mkdir takes a single argument on some systems. 
gcc_AC_FUNC_MKDIR_TAKES_ONE_ARG

# File extensions
manext='.1'
objext='.o'
AC_SUBST(manext)
AC_SUBST(objext)

# With Setjmp/Longjmp based exception handling.
AC_ARG_ENABLE(sjlj-exceptions,
[AS_HELP_STRING([--enable-sjlj-exceptions],
                [arrange to use setjmp/longjmp exception handling])],
[case $target in
  *-*-hpux10*)
    if test $enableval != yes; then
      AC_MSG_WARN([dwarf2 exceptions not supported, sjlj exceptions forced])
      enableval=yes
    fi
    ;;
esac
force_sjlj_exceptions=yes],
[case $target in
  *-*-hpux10*)
    force_sjlj_exceptions=yes
    enableval=yes
    ;;
  lm32*-*-*)
     force_sjlj_exceptions=yes
     enableval=yes
     ;;
  *)
    force_sjlj_exceptions=no
    ;;
esac])
if test $force_sjlj_exceptions = yes; then
  sjlj=`if test $enableval = yes; then echo 1; else echo 0; fi`
  AC_DEFINE_UNQUOTED(CONFIG_SJLJ_EXCEPTIONS, $sjlj,
    [Define 0/1 to force the choice for exception handling model.])
fi

# --------------------------------------------------------
# Build, host, and target specific configuration fragments
# --------------------------------------------------------

# Collect build-machine-specific information.
. ${srcdir}/config.build

# Collect host-machine-specific information.
. ${srcdir}/config.host

target_gtfiles=

# Collect target-machine-specific information.
. ${srcdir}/config.gcc

extra_objs="${host_extra_objs} ${extra_objs}"
extra_gcc_objs="${host_extra_gcc_objs} ${extra_gcc_objs}"

# Default the target-machine variables that were not explicitly set.
if test x"$tm_file" = x
then tm_file=$cpu_type/$cpu_type.h; fi

if test x"$extra_headers" = x
then extra_headers=; fi

if test x$md_file = x
then md_file=$cpu_type/$cpu_type.md; fi

if test x$out_file = x
then out_file=$cpu_type/$cpu_type.c; fi

if test x"$tmake_file" = x
then tmake_file=$cpu_type/t-$cpu_type
fi

# Support --enable-initfini-array.
if test x$enable_initfini_array != xno; then
  tm_file="${tm_file} initfini-array.h"
fi

if test x"$dwarf2" = xyes
then tm_file="$tm_file tm-dwarf2.h"
fi

# Say what files are being used for the output code and MD file.
echo "Using \`$srcdir/config/$out_file' for machine-specific logic."
echo "Using \`$srcdir/config/$md_file' as machine description file."

# If any of the xm_file variables contain nonexistent files, warn
# about them and drop them.

bx=
for x in $build_xm_file; do
  if    test -f $srcdir/config/$x
  then      bx="$bx $x"
  else      AC_MSG_WARN($srcdir/config/$x does not exist.)
  fi
done
build_xm_file="$bx"

hx=
for x in $host_xm_file; do
  if    test -f $srcdir/config/$x
  then      hx="$hx $x"
  else      AC_MSG_WARN($srcdir/config/$x does not exist.)
  fi
done
host_xm_file="$hx"

tx=
for x in $xm_file; do
  if    test -f $srcdir/config/$x
  then      tx="$tx $x"
  else      AC_MSG_WARN($srcdir/config/$x does not exist.)
  fi
done
xm_file="$tx"

count=a
for f in $tm_file; do
	count=${count}x
done
if test $count = ax; then
	echo "Using \`$srcdir/config/$tm_file' as target machine macro file."
else
	echo "Using the following target machine macro files:"
	for f in $tm_file; do
		echo "	$srcdir/config/$f"
	done
fi

if test x$need_64bit_hwint = xyes; then
	AC_DEFINE(NEED_64BIT_HOST_WIDE_INT, 1,
[Define to 1 if HOST_WIDE_INT must be 64 bits wide (see hwint.h).])
fi

if test x$use_long_long_for_widest_fast_int = xyes; then
	AC_DEFINE(USE_LONG_LONG_FOR_WIDEST_FAST_INT, 1,
[Define to 1 if the 'long long' (or '__int64') is wider than 'long' but still
efficiently supported by the host hardware.])
fi

gnu_ld_bool=`if test x"$gnu_ld" = x"yes"; then echo 1; else echo 0; fi`
AC_DEFINE_UNQUOTED(HAVE_GNU_LD, $gnu_ld_bool, [Define to 1 if using GNU ld.])

gnu_as_bool=`if test x"$gas" = x"yes"; then echo 1; else echo 0; fi`
AC_DEFINE_UNQUOTED(HAVE_GNU_AS, $gnu_as_bool, [Define to 1 if using GNU as.])

count=a
for f in $host_xm_file; do
	count=${count}x
done
if test $count = a; then
	:
elif test $count = ax; then
	echo "Using \`$srcdir/config/$host_xm_file' as host machine macro file."
else
	echo "Using the following host machine macro files:"
	for f in $host_xm_file; do
		echo "	$srcdir/config/$f"
	done
fi
echo "Using ${out_host_hook_obj} for host machine hooks."

if test "$host_xm_file" != "$build_xm_file"; then
	count=a
	for f in $build_xm_file; do
		count=${count}x
	done
	if test $count = a; then
		:
	elif test $count = ax; then
		echo "Using \`$srcdir/config/$build_xm_file' as build machine macro file."
	else
		echo "Using the following build machine macro files:"
		for f in $build_xm_file; do
			echo "	$srcdir/config/$f"
		done
	fi
fi

if test -n "$configured_native_system_header_dir"; then
  native_system_header_dir=$configured_native_system_header_dir
fi
NATIVE_SYSTEM_HEADER_DIR="$native_system_header_dir"
AC_SUBST(NATIVE_SYSTEM_HEADER_DIR)

case ${host} in
  powerpc*-*-darwin*)
    AC_CACHE_CHECK([whether mcontext_t fields have underscores],
      gcc_cv_mcontext_underscores,
      AC_COMPILE_IFELSE([
#include <sys/cdefs.h>
#include <sys/signal.h>
#include <ucontext.h>
int main() { mcontext_t m; if (m->ss.srr0) return 0; return 0; }
],
	gcc_cv_mcontext_underscores=no, gcc_cv_mcontext_underscores=yes))
      if test $gcc_cv_mcontext_underscores = yes; then
        AC_DEFINE(HAS_MCONTEXT_T_UNDERSCORES,,dnl
          [mcontext_t fields start with __])
      fi
    ;;
esac

# ---------
# Threading
# ---------

# Check if a valid thread package
case ${enable_threads} in
  "" | no)
    # No threads
    target_thread_file='single'
    ;;
  yes)
    # default
    target_thread_file='single'
    ;;
  aix | dce | lynx | mipssde | posix | rtems | \
  single | tpf | vxworks | win32)
    target_thread_file=${enable_threads}
    ;;
  *)
    echo "${enable_threads} is an unknown thread package" 1>&2
    exit 1
    ;;
esac

if test x${thread_file} = x; then
  # No thread file set by target-specific clauses in config.gcc,
  # so use file chosen by default logic above
  thread_file=${target_thread_file}
fi

# --------
# UNSORTED
# --------

use_cxa_atexit=no
if test x$enable___cxa_atexit = xyes || \
   test x$enable___cxa_atexit = x -a x$default_use_cxa_atexit = xyes; then
  if test x$host = x$target; then
    case $host in
      # mingw32 doesn't have __cxa_atexit but uses atexit registration
      # keyed to flag_use_cxa_atexit
      *-*-mingw32*)
	use_cxa_atexit=yes
	;;
      powerpc-ibm-aix*)
	use_cxa_atexit=yes
	;;
      *)
	AC_CHECK_FUNC(__cxa_atexit,[use_cxa_atexit=yes],
	  [echo "__cxa_atexit can't be enabled on this target"])
	;;
    esac
  else
    # We can't check for __cxa_atexit when building a cross, so assume
    # it is available 
    use_cxa_atexit=yes
  fi
  if test x$use_cxa_atexit = xyes; then
    AC_DEFINE(DEFAULT_USE_CXA_ATEXIT, 2,
      [Define if you want to use __cxa_atexit, rather than atexit, to
      register C++ destructors for local statics and global objects.
      This is essential for fully standards-compliant handling of
      destructors, but requires __cxa_atexit in libc.])
  fi
fi

# Look for a file containing extra machine modes.
if test -n "$extra_modes" && test -f $srcdir/config/$extra_modes; then
  extra_modes_file='$(srcdir)'/config/${extra_modes}
  AC_SUBST(extra_modes_file)
  AC_DEFINE_UNQUOTED(EXTRA_MODES_FILE, "config/$extra_modes",
  [Define to the name of a file containing a list of extra machine modes
   for this architecture.])
fi

# Convert extra_options into a form suitable for Makefile use.
extra_opt_files=
all_opt_files=
for f in $extra_options; do
  extra_opt_files="$extra_opt_files \$(srcdir)/config/$f"
  all_opt_files="$all_opt_files $srcdir/config/$f"
done
AC_SUBST(extra_opt_files)

# auto-host.h is the file containing items generated by autoconf and is
# the first file included by config.h.
# If host=build, it is correct to have bconfig include auto-host.h
# as well.  If host!=build, we are in error and need to do more 
# work to find out the build config parameters.
if test x$host = x$build
then
	build_auto=auto-host.h
else
	# We create a subdir, then run autoconf in the subdir.
	# To prevent recursion we set host and build for the new
	# invocation of configure to the build for this invocation
	# of configure. 
	tempdir=build.$$
	rm -rf $tempdir
	mkdir $tempdir
	cd $tempdir
	case ${srcdir} in
	/* | [A-Za-z]:[\\/]* ) realsrcdir=${srcdir};;
	*) realsrcdir=../${srcdir};;
	esac
	# Clearing GMPINC is necessary to prevent host headers being
	# used by the build compiler.  Defining GENERATOR_FILE stops
	# system.h from including gmp.h.
	CC="${CC_FOR_BUILD}" CFLAGS="${CFLAGS_FOR_BUILD}" \
	CXX="${CXX_FOR_BUILD}" CXXFLAGS="${CXXFLAGS_FOR_BUILD}" \
	LD="${LD_FOR_BUILD}" LDFLAGS="${LDFLAGS_FOR_BUILD}" \
	GMPINC="" CPPFLAGS="${CPPFLAGS} -DGENERATOR_FILE" \
	${realsrcdir}/configure \
		--enable-languages=${enable_languages-all} \
		--target=$target_alias --host=$build_alias --build=$build_alias

	# We just finished tests for the build machine, so rename
	# the file auto-build.h in the gcc directory.
	mv auto-host.h ../auto-build.h
	cd ..
	rm -rf $tempdir
	build_auto=auto-build.h
fi
AC_SUBST(build_subdir)

tm_file="${tm_file} defaults.h"
tm_p_file="${tm_p_file} tm-preds.h"
host_xm_file="auto-host.h ansidecl.h ${host_xm_file}"
build_xm_file="${build_auto} ansidecl.h ${build_xm_file}"
# We don't want ansidecl.h in target files, write code there in ISO/GNU C.
# put this back in temporarily.
xm_file="auto-host.h ansidecl.h ${xm_file}"

# --------
# UNSORTED
# --------

changequote(,)dnl
# Compile in configure arguments.
if test -f configargs.h ; then
	# Being re-configured.
	gcc_config_arguments=`grep configuration_arguments configargs.h | sed -e 's/.*"\([^"]*\)".*/\1/'`
	gcc_config_arguments="$gcc_config_arguments : (reconfigured) $TOPLEVEL_CONFIGURE_ARGUMENTS"
else
	gcc_config_arguments="$TOPLEVEL_CONFIGURE_ARGUMENTS"
fi

# Double all backslashes and backslash all quotes to turn
# gcc_config_arguments into a C string.
sed -e 's/\\/\\\\/g; s/"/\\"/g' <<EOF >conftest.out
$gcc_config_arguments
EOF
gcc_config_arguments_str=`cat conftest.out`
rm -f conftest.out

cat > configargs.h <<EOF
/* Generated automatically. */
static const char configuration_arguments[] = "$gcc_config_arguments_str";
static const char thread_model[] = "$thread_file";

static const struct {
  const char *name, *value;
} configure_default_options[] = $configure_default_options;
EOF
changequote([,])dnl

changequote(,)dnl
gcc_BASEVER=`cat $srcdir/BASE-VER`
gcc_DEVPHASE=`cat $srcdir/DEV-PHASE`
gcc_DATESTAMP=`cat $srcdir/DATESTAMP`
if test -f $srcdir/REVISION ; then
	gcc_REVISION=`cat $srcdir/REVISION`
else
        gcc_REVISION=""
fi
cat > plugin-version.h <<EOF
#include "configargs.h"

#define GCCPLUGIN_VERSION_MAJOR   `echo $gcc_BASEVER | sed -e 's/^\([0-9]*\).*$/\1/'`
#define GCCPLUGIN_VERSION_MINOR   `echo $gcc_BASEVER | sed -e 's/^[0-9]*\.\([0-9]*\).*$/\1/'`
#define GCCPLUGIN_VERSION_PATCHLEVEL   `echo $gcc_BASEVER | sed -e 's/^[0-9]*\.[0-9]*\.\([0-9]*\)$/\1/'`
#define GCCPLUGIN_VERSION  (GCCPLUGIN_VERSION_MAJOR*1000 + GCCPLUGIN_VERSION_MINOR)

static char basever[] = "$gcc_BASEVER";
static char datestamp[] = "$gcc_DATESTAMP";
static char devphase[] = "$gcc_DEVPHASE";
static char revision[] = "$gcc_REVISION";

/* FIXME plugins: We should make the version information more precise.
   One way to do is to add a checksum. */

static struct plugin_gcc_version gcc_version = {basever, datestamp,
						devphase, revision,
						configuration_arguments};
EOF
changequote([,])dnl

# Internationalization
ZW_GNU_GETTEXT_SISTER_DIR

# If LIBINTL contains LIBICONV, then clear LIBICONV so we don't get
# -liconv on the link line twice.
case "$LIBINTL" in *$LIBICONV*)
	LIBICONV= ;;
esac

AC_ARG_ENABLE(secureplt,
[AS_HELP_STRING([--enable-secureplt],
		[enable -msecure-plt by default for PowerPC])],
[], [])

AC_ARG_ENABLE(leading-mingw64-underscores,
  AS_HELP_STRING([--enable-leading-mingw64-underscores],
                 [enable leading underscores on 64 bit mingw targets]),
  [],[])
AS_IF([ test x"$enable_leading_mingw64_underscores" = xyes ],
  [AC_DEFINE(USE_MINGW64_LEADING_UNDERSCORES, 1,
    [Define if we should use leading underscore on 64 bit mingw targets])])

AC_ARG_ENABLE(cld,
[AS_HELP_STRING([--enable-cld], [enable -mcld by default for 32bit x86])], [],
[enable_cld=no])

AC_ARG_ENABLE(frame-pointer,
[AS_HELP_STRING([--enable-frame-pointer],
		[enable -fno-omit-frame-pointer by default for 32bit x86])], [],
[
case $target_os in
linux* | darwin[[8912]]*)
  # Enable -fomit-frame-pointer by default for Linux and Darwin with
  # DWARF2.
  enable_frame_pointer=no
  ;;
*)
  enable_frame_pointer=yes
  ;;
esac
])

# Windows32 Registry support for specifying GCC installation paths.
AC_ARG_ENABLE(win32-registry,
[AS_HELP_STRING([--disable-win32-registry],
                [disable lookup of installation paths in the
                 Registry on Windows hosts])
AS_HELP_STRING([--enable-win32-registry], [enable registry lookup (default)])
AS_HELP_STRING([--enable-win32-registry=KEY],
               [use KEY instead of GCC version as the last portion
                of the registry key])],,)

case $host_os in
  win32 | pe | cygwin* | mingw32* | uwin*)
    if test "x$enable_win32_registry" != xno; then
      AC_SEARCH_LIBS(RegOpenKeyExA, advapi32,, [enable_win32_registry=no])
    fi

    if test "x$enable_win32_registry" != xno; then
      AC_DEFINE(ENABLE_WIN32_REGISTRY, 1,
  [Define to 1 if installation paths should be looked up in the Windows
   Registry. Ignored on non-Windows hosts.])

      if test "x$enable_win32_registry" != xyes \
         && test "x$enable_win32_registry" != x; then
	AC_DEFINE_UNQUOTED(WIN32_REGISTRY_KEY, "$enable_win32_registry",
  [Define to be the last component of the Windows registry key under which
   to look for installation paths.  The full key used will be 
   HKEY_LOCAL_MACHINE/SOFTWARE/Free Software Foundation/{WIN32_REGISTRY_KEY}.
   The default is the GCC version number.])
      fi
    fi
  ;;
esac

# Get an absolute path to the GCC top-level source directory
holddir=`${PWDCMD-pwd}`
cd $srcdir
topdir=`${PWDCMD-pwd}`
cd $holddir

# Conditionalize the makefile for this host machine.
xmake_file=
for f in ${host_xmake_file}
do
	if test -f ${srcdir}/config/$f
	then
		xmake_file="${xmake_file} \$(srcdir)/config/$f"
	fi
done

# Conditionalize the makefile for this target machine.
tmake_file_=
for f in ${tmake_file}
do
	if test -f ${srcdir}/config/$f
	then
		tmake_file_="${tmake_file_} \$(srcdir)/config/$f"
	fi
done
tmake_file="${tmake_file_}"

out_object_file=`basename $out_file .c`.o
common_out_object_file=`basename $common_out_file .c`.o

tm_file_list="options.h"
tm_include_list="options.h insn-constants.h"
for f in $tm_file; do
  case $f in
    ./* )
       f=`echo $f | sed 's/^..//'`
       tm_file_list="${tm_file_list} $f"
       tm_include_list="${tm_include_list} $f"
       ;;
    defaults.h )
       tm_file_list="${tm_file_list} \$(srcdir)/$f"
       tm_include_list="${tm_include_list} $f"
       ;;
    * )
       tm_file_list="${tm_file_list} \$(srcdir)/config/$f"
       tm_include_list="${tm_include_list} config/$f"
       ;;
  esac
done

tm_p_file_list=
tm_p_include_list=
for f in $tm_p_file; do
  case $f in
    tm-preds.h )
       tm_p_file_list="${tm_p_file_list} $f"
       tm_p_include_list="${tm_p_include_list} $f"
       ;;
    * )
       tm_p_file_list="${tm_p_file_list} \$(srcdir)/config/$f"
       tm_p_include_list="${tm_p_include_list} config/$f"
  esac
done

xm_file_list=
xm_include_list=
for f in $xm_file; do
  case $f in
    ansidecl.h )
       xm_file_list="${xm_file_list} \$(srcdir)/../include/$f"
       xm_include_list="${xm_include_list} $f"
       ;;
    auto-host.h )
       xm_file_list="${xm_file_list} $f"
       xm_include_list="${xm_include_list} $f"
       ;;
    * )
       xm_file_list="${xm_file_list} \$(srcdir)/config/$f"
       xm_include_list="${xm_include_list} config/$f"
       ;;
  esac
done

host_xm_file_list=
host_xm_include_list=
for f in $host_xm_file; do
  case $f in
    ansidecl.h )
       host_xm_file_list="${host_xm_file_list} \$(srcdir)/../include/$f"
       host_xm_include_list="${host_xm_include_list} $f"
       ;;
    auto-host.h )
       host_xm_file_list="${host_xm_file_list} $f"
       host_xm_include_list="${host_xm_include_list} $f"
       ;;
    * )
       host_xm_file_list="${host_xm_file_list} \$(srcdir)/config/$f"
       host_xm_include_list="${host_xm_include_list} config/$f"
       ;;
  esac
done

build_xm_file_list=
for f in $build_xm_file; do
  case $f in
    ansidecl.h )
       build_xm_file_list="${build_xm_file_list} \$(srcdir)/../include/$f"
       build_xm_include_list="${build_xm_include_list} $f"
       ;;
    auto-build.h | auto-host.h )
       build_xm_file_list="${build_xm_file_list} $f"
       build_xm_include_list="${build_xm_include_list} $f"
       ;;
    * )
       build_xm_file_list="${build_xm_file_list} \$(srcdir)/config/$f"
       build_xm_include_list="${build_xm_include_list} config/$f"
       ;;
  esac
done

# Define macro CROSS_DIRECTORY_STRUCTURE in compilation if this is a
# cross-compiler which does not use the native headers and libraries.
# Also use all.cross instead of all.internal and adjust SYSTEM_HEADER_DIR.
CROSS=						AC_SUBST(CROSS)
ALL=all.internal				AC_SUBST(ALL)
SYSTEM_HEADER_DIR='$(NATIVE_SYSTEM_HEADER_DIR)'	AC_SUBST(SYSTEM_HEADER_DIR)

if test "x$with_build_sysroot" != x; then
  build_system_header_dir=$with_build_sysroot'$${sysroot_headers_suffix}$(NATIVE_SYSTEM_HEADER_DIR)'
else
  # This value is used, even on a native system, because 
  # CROSS_SYSTEM_HEADER_DIR is just 
  # $(TARGET_SYSTEM_ROOT)$(NATIVE_SYSTEM_HEADER_DIR).
  build_system_header_dir='$(CROSS_SYSTEM_HEADER_DIR)'
fi

if test x$host != x$target
then
	CROSS="-DCROSS_DIRECTORY_STRUCTURE"
	ALL=all.cross
	SYSTEM_HEADER_DIR=$build_system_header_dir
	case "$host","$target" in
	# Darwin crosses can use the host system's libraries and headers,
	# because of the fat library support.  Of course, it must be the
	# same version of Darwin on both sides.  Allow the user to
	# just say --target=foo-darwin without a version number to mean
	# "the version on this system".
	    *-*-darwin*,*-*-darwin*)
		hostos=`echo $host | sed 's/.*-darwin/darwin/'`
		targetos=`echo $target | sed 's/.*-darwin/darwin/'`
		if test $hostos = $targetos -o $targetos = darwin ; then
		    CROSS=
		    SYSTEM_HEADER_DIR='$(NATIVE_SYSTEM_HEADER_DIR)'
		    with_headers=yes
		fi
		;;

	    i?86-*-*,x86_64-*-* \
	    | powerpc*-*-*,powerpc64*-*-*)
		CROSS="$CROSS -DNATIVE_CROSS" ;;
	esac

	case $target in
		*-*-mingw*)
			if test "x$with_headers" = x; then
				with_headers=yes
			fi
			;;
		*)
			;;
	esac
elif test "x$TARGET_SYSTEM_ROOT" != x; then
        SYSTEM_HEADER_DIR=$build_system_header_dir 
fi

# If this is a cross-compiler that does not
# have its own set of headers then define
# inhibit_libc

# If this is using newlib, without having the headers available now,
# then define inhibit_libc in LIBGCC2_CFLAGS.
# This prevents libgcc2 from containing any code which requires libc
# support.
: ${inhibit_libc=false}
if { { test x$host != x$target && test "x$with_sysroot" = x ; } ||
       test x$with_newlib = xyes ; } &&
     { test "x$with_headers" = x || test "x$with_headers" = xno ; } ; then
       inhibit_libc=true
fi
AC_SUBST(inhibit_libc)

# When building gcc with a cross-compiler, we need to adjust things so
# that the generator programs are still built with the native compiler.
# Also, we cannot run fixincludes.

# These are the normal (build=host) settings:
CC_FOR_BUILD='$(CC)'		AC_SUBST(CC_FOR_BUILD)
CXX_FOR_BUILD='$(CXX)'		AC_SUBST(CXX_FOR_BUILD)
BUILD_CFLAGS='$(ALL_CFLAGS)'	AC_SUBST(BUILD_CFLAGS)
BUILD_CXXFLAGS='$(ALL_CXXFLAGS)' AC_SUBST(BUILD_CXXFLAGS)
BUILD_LDFLAGS='$(LDFLAGS)'	AC_SUBST(BUILD_LDFLAGS)
STMP_FIXINC=stmp-fixinc		AC_SUBST(STMP_FIXINC)

# And these apply if build != host, or we are generating coverage data
if test x$build != x$host || test "x$coverage_flags" != x
then
    BUILD_CFLAGS='$(INTERNAL_CFLAGS) $(T_CFLAGS) $(CFLAGS_FOR_BUILD)'
    BUILD_CXXFLAGS='$(INTERNAL_CFLAGS) $(T_CFLAGS) $(CXXFLAGS_FOR_BUILD)'
    BUILD_LDFLAGS='$(LDFLAGS_FOR_BUILD)'
fi

# Expand extra_headers to include complete path.
# This substitutes for lots of t-* files.
extra_headers_list=
# Prepend $(srcdir)/config/${cpu_type}/ to every entry in extra_headers.
for file in ${extra_headers} ; do
  extra_headers_list="${extra_headers_list} \$(srcdir)/config/${cpu_type}/${file}"
done

# If use_gcc_tgmath is set, append ginclude/tgmath.h.
if test x"$use_gcc_tgmath" = xyes
then extra_headers_list="${extra_headers_list} \$(srcdir)/ginclude/tgmath.h"
fi

# Define collect2 in Makefile.
case $host_can_use_collect2 in
  no) collect2= ;;
  *) collect2='collect2$(exeext)' ;;
esac
AC_SUBST([collect2])

# Add a definition of USE_COLLECT2 if system wants one.
case $use_collect2 in
  no) use_collect2= ;;
  "") ;;
  *) 
    host_xm_defines="${host_xm_defines} USE_COLLECT2"
    xm_defines="${xm_defines} USE_COLLECT2"
    case $host_can_use_collect2 in
      no)
        AC_MSG_ERROR([collect2 is required but cannot be built on this system])
        ;;
    esac
    ;;
esac

AC_DEFINE_UNQUOTED(FRPLUGINSONAME,"${host_function_reordering_plugin_soname}",
[Define to the name of the function reordering plugin DSO that must be
  passed to the linker's -plugin=LIB option.])

AC_DEFINE_UNQUOTED(LTOPLUGINSONAME,"${host_lto_plugin_soname}",
[Define to the name of the LTO plugin DSO that must be
  passed to the linker's -plugin=LIB option.])

# ---------------------------
# Assembler & linker features
# ---------------------------

# During stage 2, ld is actually gcc/collect-ld, which is a small script to
# discern between when to use prev-ld/ld-new and when to use ld/ld-new.
# However when ld-new is first executed from the build tree, libtool will
# relink it as .libs/lt-ld-new, so that it can give it an RPATH that refers
# to the build tree.  While doing this we need to use the previous-stage
# linker, or we have an infinite loop.  The presence of a shell script as
# ld/ld-new, and the fact that the script *uses ld itself*, is what confuses
# the gcc/collect-ld script.  So we need to know how libtool works, or
# exec-tool will fail.

m4_defun([_LT_CONFIG_COMMANDS], [])
AC_PROG_LIBTOOL
AC_SUBST(objdir)
AC_SUBST(enable_fast_install)

# Identify the assembler which will work hand-in-glove with the newly
# built GCC, so that we can examine its features.  This is the assembler
# which will be driven by the driver program.
#
# If build != host, and we aren't building gas in-tree, we identify a
# build->target assembler and hope that it will have the same features
# as the host->target assembler we'll be using.
gcc_cv_gas_major_version=
gcc_cv_gas_minor_version=
gcc_cv_as_gas_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/gas

m4_pattern_allow([AS_FOR_TARGET])dnl
AS_VAR_SET_IF(gcc_cv_as,, [
if test -x "$DEFAULT_ASSEMBLER"; then
	gcc_cv_as="$DEFAULT_ASSEMBLER"
elif test -f $gcc_cv_as_gas_srcdir/configure.in \
     && test -f ../gas/Makefile \
     && test x$build = x$host; then
	gcc_cv_as=../gas/as-new$build_exeext
elif test -x as$build_exeext; then
	# Build using assembler in the current directory.
	gcc_cv_as=./as$build_exeext
elif ( set dummy $AS_FOR_TARGET; test -x $[2] ); then
        gcc_cv_as="$AS_FOR_TARGET"
else
        AC_PATH_PROG(gcc_cv_as, $AS_FOR_TARGET)
fi])

ORIGINAL_AS_FOR_TARGET=$gcc_cv_as
AC_SUBST(ORIGINAL_AS_FOR_TARGET)
case "$ORIGINAL_AS_FOR_TARGET" in
  ./as | ./as$build_exeext) ;;
  *) AC_CONFIG_FILES(as:exec-tool.in, [chmod +x as]) ;;
esac 

AC_MSG_CHECKING(what assembler to use)
if test "$gcc_cv_as" = ../gas/as-new$build_exeext; then
  # Single tree build which includes gas.  We want to prefer it
  # over whatever linker top-level may have detected, since
  # we'll use what we're building after installation anyway.
  AC_MSG_RESULT(newly built gas)
  in_tree_gas=yes
  _gcc_COMPUTE_GAS_VERSION
  in_tree_gas_is_elf=no
  if grep 'obj_format = elf' ../gas/Makefile > /dev/null \
     || (grep 'obj_format = multi' ../gas/Makefile \
         && grep 'extra_objects =.* obj-elf' ../gas/Makefile) > /dev/null
  then
    in_tree_gas_is_elf=yes
  fi
else
  AC_MSG_RESULT($gcc_cv_as)
  in_tree_gas=no
fi

default_ld=
AC_ARG_ENABLE(ld,
[[  --enable-ld[=ARG]       build ld [ARG={default,yes,no}]]],
[case "${enableval}" in
 no)
   default_ld=ld.gold
   ;;
 esac])

AC_ARG_ENABLE(gold,
[[  --enable-gold[=ARG]     build gold [ARG={default,yes,no}]]],
[case "${enableval}" in
 default)
   install_gold_as_default=yes
   ;;
 yes)
   if test x${default_ld} != x; then
     install_gold_as_default=yes
   fi
   ;;
 no)
   ;;
 *)
   AC_MSG_ERROR([invalid --enable-gold argument])
   ;;
 esac],
[install_gold_as_default=no])

# Identify the linker which will work hand-in-glove with the newly
# built GCC, so that we can examine its features.  This is the linker
# which will be driven by the driver program.
#
# If build != host, and we aren't building gas in-tree, we identify a
# build->target linker and hope that it will have the same features
# as the host->target linker we'll be using.
gcc_cv_gld_major_version=
gcc_cv_gld_minor_version=
gcc_cv_ld_gld_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/ld
gcc_cv_ld_gold_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/gold
gcc_cv_ld_bfd_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/bfd

AS_VAR_SET_IF(gcc_cv_ld,, [
if test -x "$DEFAULT_LINKER"; then
	gcc_cv_ld="$DEFAULT_LINKER"
elif test $install_gold_as_default = yes \
     && test -f $gcc_cv_ld_gold_srcdir/configure.ac \
     && test -f ../gold/Makefile \
     && test x$build = x$host; then
	gcc_cv_ld=../gold/ld-new$build_exeext
elif test -f $gcc_cv_ld_gld_srcdir/configure.in \
     && test -f ../ld/Makefile \
     && test x$build = x$host; then
	gcc_cv_ld=../ld/ld-new$build_exeext
elif test -x collect-ld$build_exeext; then
	# Build using linker in the current directory.
	gcc_cv_ld=./collect-ld$build_exeext
elif ( set dummy $LD_FOR_TARGET; test -x $[2] ); then
        gcc_cv_ld="$LD_FOR_TARGET"
else
        AC_PATH_PROG(gcc_cv_ld, $LD_FOR_TARGET)
fi])

ORIGINAL_PLUGIN_LD_FOR_TARGET=$gcc_cv_ld
PLUGIN_LD_SUFFIX=`basename $gcc_cv_ld | sed -e "s,$target_alias-,,"`
# if the PLUGIN_LD is set ld-new, just have it as ld
# as that is the installed named.
if test x$PLUGIN_LD_SUFFIX = xld-new \
   || test x$PLUGIN_LD_SUFFIX = xcollect-ld ; then
  PLUGIN_LD_SUFFIX=ld
fi
AC_ARG_WITH(plugin-ld,
[AS_HELP_STRING([[--with-plugin-ld=[ARG]]], [specify the plugin linker])],
[if test x"$withval" != x; then
   ORIGINAL_PLUGIN_LD_FOR_TARGET="$withval"
   PLUGIN_LD_SUFFIX=`echo $withval | sed -e "s,$target_alias-,,"`
 fi])
AC_SUBST(ORIGINAL_PLUGIN_LD_FOR_TARGET)
AC_DEFINE_UNQUOTED(PLUGIN_LD_SUFFIX, "$PLUGIN_LD_SUFFIX", [Specify plugin linker])

# Check to see if we are using gold instead of ld
AC_MSG_CHECKING(whether we are using gold)
ld_is_gold=no
if test x$gcc_cv_ld != x; then
  if $gcc_cv_ld --version 2>/dev/null | sed 1q \
     | grep "GNU gold" > /dev/null; then
    ld_is_gold=yes
  fi
fi
AC_MSG_RESULT($ld_is_gold)

ORIGINAL_LD_FOR_TARGET=$gcc_cv_ld
AC_SUBST(ORIGINAL_LD_FOR_TARGET)
case "$ORIGINAL_LD_FOR_TARGET" in
  ./collect-ld | ./collect-ld$build_exeext) ;;
  *) AC_CONFIG_FILES(collect-ld:exec-tool.in, [chmod +x collect-ld]) ;;
esac 

AC_MSG_CHECKING(what linker to use)
if test "$gcc_cv_ld" = ../ld/ld-new$build_exeext \
   || test "$gcc_cv_ld" = ../gold/ld-new$build_exeext; then
	# Single tree build which includes ld.  We want to prefer it
	# over whatever linker top-level may have detected, since
	# we'll use what we're building after installation anyway.
	AC_MSG_RESULT(newly built ld)
	in_tree_ld=yes
	in_tree_ld_is_elf=no
	if (grep 'EMUL = .*elf' ../ld/Makefile \
	    || grep 'EMUL = .*linux' ../ld/Makefile \
	    || grep 'EMUL = .*lynx' ../ld/Makefile) > /dev/null; then
	  in_tree_ld_is_elf=yes
	elif test "$ld_is_gold" = yes; then
	  in_tree_ld_is_elf=yes
	fi
	for f in $gcc_cv_ld_bfd_srcdir/configure $gcc_cv_ld_gld_srcdir/configure $gcc_cv_ld_gld_srcdir/configure.in $gcc_cv_ld_gld_srcdir/Makefile.in
	do
changequote(,)dnl
		gcc_cv_gld_version=`sed -n -e 's/^[ 	]*VERSION=[^0-9A-Za-z_]*\([0-9]*\.[0-9]*.*\)/VERSION=\1/p' < $f`
		if test x$gcc_cv_gld_version != x; then
			break
		fi
	done
	case $gcc_cv_gld_version in
	  VERSION=[0-9]*) ;;
changequote([,])dnl
	  *) AC_MSG_ERROR([[cannot find version of in-tree linker]]) ;;
changequote(,)dnl
	esac
	gcc_cv_gld_major_version=`expr "$gcc_cv_gld_version" : "VERSION=\([0-9]*\)"`
	gcc_cv_gld_minor_version=`expr "$gcc_cv_gld_version" : "VERSION=[0-9]*\.\([0-9]*\)"`
changequote([,])dnl
	ORIGINAL_LD_BFD_FOR_TARGET=../ld/ld-new$build_exeext
	ORIGINAL_LD_GOLD_FOR_TARGET=../gold/ld-new$build_exeext
else
	AC_MSG_RESULT($gcc_cv_ld)
	in_tree_ld=no
	gcc_cvs_ld_program=`dirname $gcc_cv_ld`/`basename $gcc_cv_ld $host_exeext`
	ORIGINAL_LD_BFD_FOR_TARGET=${gcc_cvs_ld_program}.bfd$host_exeext
	ORIGINAL_LD_GOLD_FOR_TARGET=${gcc_cvs_ld_program}.gold$host_exeext
fi

AC_SUBST(ORIGINAL_LD_BFD_FOR_TARGET)
AC_SUBST(ORIGINAL_LD_GOLD_FOR_TARGET)

# Figure out what nm we will be using.
gcc_cv_binutils_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/binutils
AS_VAR_SET_IF(gcc_cv_nm,, [
if test -f $gcc_cv_binutils_srcdir/configure.in \
     && test -f ../binutils/Makefile \
     && test x$build = x$host; then
	gcc_cv_nm=../binutils/nm-new$build_exeext
elif test -x nm$build_exeext; then
	gcc_cv_nm=./nm$build_exeext
elif ( set dummy $NM_FOR_TARGET; test -x $[2] ); then
        gcc_cv_nm="$NM_FOR_TARGET"
else
        AC_PATH_PROG(gcc_cv_nm, $NM_FOR_TARGET)
fi])

AC_MSG_CHECKING(what nm to use)
if test "$gcc_cv_nm" = ../binutils/nm-new$build_exeext; then
	# Single tree build which includes binutils.
	AC_MSG_RESULT(newly built nm)
	in_tree_nm=yes
else
	AC_MSG_RESULT($gcc_cv_nm)
	in_tree_nm=no
fi

ORIGINAL_NM_FOR_TARGET=$gcc_cv_nm
AC_SUBST(ORIGINAL_NM_FOR_TARGET)
case "$ORIGINAL_NM_FOR_TARGET" in
  ./nm | ./nm$build_exeext) ;;
  *) AC_CONFIG_FILES(nm:exec-tool.in, [chmod +x nm]) ;;
esac


# Figure out what objdump we will be using.
AS_VAR_SET_IF(gcc_cv_objdump,, [
if test -f $gcc_cv_binutils_srcdir/configure.in \
     && test -f ../binutils/Makefile \
     && test x$build = x$host; then
	# Single tree build which includes binutils.
	gcc_cv_objdump=../binutils/objdump$build_exeext
elif test -x objdump$build_exeext; then
	gcc_cv_objdump=./objdump$build_exeext
elif ( set dummy $OBJDUMP_FOR_TARGET; test -x $[2] ); then
        gcc_cv_objdump="$OBJDUMP_FOR_TARGET"
else
        AC_PATH_PROG(gcc_cv_objdump, $OBJDUMP_FOR_TARGET)
fi])

AC_MSG_CHECKING(what objdump to use)
if test "$gcc_cv_objdump" = ../binutils/objdump$build_exeext; then
	# Single tree build which includes binutils.
	AC_MSG_RESULT(newly built objdump)
elif test x$gcc_cv_objdump = x; then
	AC_MSG_RESULT(not found)
else
	AC_MSG_RESULT($gcc_cv_objdump)
fi

# Figure out what readelf we will be using.
AS_VAR_SET_IF(gcc_cv_readelf,, [
if test -f $gcc_cv_binutils_srcdir/configure.in \
     && test -f ../binutils/Makefile \
     && test x$build = x$host; then
	# Single tree build which includes binutils.
	gcc_cv_readelf=../binutils/readelf$build_exeext
elif test -x readelf$build_exeext; then
	gcc_cv_readelf=./readelf$build_exeext
elif ( set dummy $READELF_FOR_TARGET; test -x $[2] ); then
        gcc_cv_readelf="$READELF_FOR_TARGET"
else
        AC_PATH_PROG(gcc_cv_readelf, $READELF_FOR_TARGET)
fi])

AC_MSG_CHECKING(what readelf to use)
if test "$gcc_cv_readelf" = ../binutils/readelf$build_exeext; then
	# Single tree build which includes binutils.
	AC_MSG_RESULT(newly built readelf)
elif test x$gcc_cv_readelf = x; then
	AC_MSG_RESULT(not found)
else
	AC_MSG_RESULT($gcc_cv_readelf)
fi

# Figure out what assembler alignment features are present.
gcc_GAS_CHECK_FEATURE([.balign and .p2align], gcc_cv_as_balign_and_p2align,
 [2,6,0],,
[.balign 4
.p2align 2],,
[AC_DEFINE(HAVE_GAS_BALIGN_AND_P2ALIGN, 1,
  [Define if your assembler supports .balign and .p2align.])])

gcc_GAS_CHECK_FEATURE([.p2align with maximum skip], gcc_cv_as_max_skip_p2align,
 [2,8,0],,
 [.p2align 4,,7],,
[AC_DEFINE(HAVE_GAS_MAX_SKIP_P2ALIGN, 1,
  [Define if your assembler supports specifying the maximum number
   of bytes to skip when using the GAS .p2align command.])])

gcc_GAS_CHECK_FEATURE([.literal16], gcc_cv_as_literal16,
 [2,8,0],,
 [.literal16],,
[AC_DEFINE(HAVE_GAS_LITERAL16, 1,
  [Define if your assembler supports .literal16.])])

gcc_GAS_CHECK_FEATURE([working .subsection -1], gcc_cv_as_subsection_m1,
 [elf,2,9,0],,
 [conftest_label1: .word 0
.subsection -1
conftest_label2: .word 0
.previous],
 [if test x$gcc_cv_nm != x; then
    $gcc_cv_nm conftest.o | grep conftest_label1 > conftest.nm1
    $gcc_cv_nm conftest.o | grep conftest_label2 | sed -e 's/label2/label1/' > conftest.nm2
    if cmp conftest.nm1 conftest.nm2 > /dev/null 2>&1
    then :
    else gcc_cv_as_subsection_m1=yes
    fi
    rm -f conftest.nm1 conftest.nm2
  fi],
 [AC_DEFINE(HAVE_GAS_SUBSECTION_ORDERING, 1,
  [Define if your assembler supports .subsection and .subsection -1 starts
   emitting at the beginning of your section.])])

gcc_GAS_CHECK_FEATURE([.weak], gcc_cv_as_weak,
 [2,2,0],,
 [	.weak foobar],,
[AC_DEFINE(HAVE_GAS_WEAK, 1, [Define if your assembler supports .weak.])])

gcc_GAS_CHECK_FEATURE([.weakref], gcc_cv_as_weakref,
 [2,17,0],,
 [	.weakref foobar, barfnot],,
[AC_DEFINE(HAVE_GAS_WEAKREF, 1, [Define if your assembler supports .weakref.])])

gcc_GAS_CHECK_FEATURE([.nsubspa comdat], gcc_cv_as_nsubspa_comdat,
 [2,15,91],,
 [	.SPACE $TEXT$
	.NSUBSPA $CODE$,COMDAT],,
[AC_DEFINE(HAVE_GAS_NSUBSPA_COMDAT, 1, [Define if your assembler supports .nsubspa comdat option.])])

# .hidden needs to be supported in both the assembler and the linker,
# because GNU LD versions before 2.12.1 have buggy support for STV_HIDDEN.
# This is irritatingly difficult to feature test for; we have to check the
# date string after the version number.  If we've got an in-tree
# ld, we don't know its patchlevel version, so we set the baseline at 2.13
# to be safe.
# The gcc_GAS_CHECK_FEATURE call just sets a cache variable.
gcc_GAS_CHECK_FEATURE([.hidden], gcc_cv_as_hidden,
 [elf,2,13,0],,
[	.hidden foobar
foobar:],[
# Solaris 9/x86 as incorrectly emits an alias for a hidden symbol with
# STV_HIDDEN, so disable .hidden support if so.
case "${target}" in
  i?86-*-solaris2* | x86_64-*-solaris2.1[[0-9]]*)
    if test x$gcc_cv_as != x && test x$gcc_cv_objdump != x; then
      cat > conftest.s <<EOF
.globl hidden
        .hidden hidden
hidden:
.globl default
        .set    default,hidden
EOF
      if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1 \
        && $gcc_cv_objdump -t conftest.o 2>/dev/null | \
        grep '\.hidden default' > /dev/null; then
        gcc_cv_as_hidden=no
      else
        gcc_cv_as_hidden=yes
      fi
    else
      # Assume bug is present if objdump is missing.
      gcc_cv_as_hidden=no
    fi
    ;;
  *)
    gcc_cv_as_hidden=yes
    ;;
esac])
case "${target}" in
  *-*-darwin*)
    # Darwin as has some visibility support, though with a different syntax.
    gcc_cv_as_hidden=yes
    ;;
esac

# gnu_indirect_function type is an extension proposed at
# http://groups.google/com/group/generic-abi/files. It allows dynamic runtime
# selection of function implementation
AC_ARG_ENABLE(gnu-indirect-function,
 [AS_HELP_STRING([--enable-gnu-indirect-function],
                 [enable the use of the @gnu_indirect_function to glibc systems])],
 [case $enable_gnu_indirect_function in
    yes | no) ;;
    *) AC_MSG_ERROR(['$enable_gnu_indirect_function' is an invalid value for --enable-gnu-indirect-function.
Valid choices are 'yes' and 'no'.]) ;;
  esac],
 [enable_gnu_indirect_function="$default_gnu_indirect_function"])

gif=`if test x$enable_gnu_indirect_function = xyes; then echo 1; else echo 0; fi`
AC_DEFINE_UNQUOTED(HAVE_GNU_INDIRECT_FUNCTION, $gif,
[Define if your system supports gnu indirect functions.])


changequote(,)dnl
if test $in_tree_ld != yes ; then
  ld_ver=`$gcc_cv_ld --version 2>/dev/null | sed 1q`
  if echo "$ld_ver" | grep GNU > /dev/null; then
    if test x"$ld_is_gold" = xyes; then
      # GNU gold --version looks like this:
      #
      # GNU gold (GNU Binutils 2.21.51.20110225) 1.11
      #
      # We extract the binutils version which is more familiar and specific
      # than the gold version.
      ld_vers=`echo $ld_ver | sed -n \
	  -e 's,^[^)]*[	 ]\([0-9][0-9]*\.[0-9][0-9]*[^)]*\)) .*$,\1,p'`
    else
      # GNU ld --version looks like this:
      #
      # GNU ld (GNU Binutils) 2.21.51.20110225
      ld_vers=`echo $ld_ver | sed -n \
	  -e 's,^.*[	 ]\([0-9][0-9]*\.[0-9][0-9]*.*\)$,\1,p'`
    fi
    ld_date=`echo $ld_ver | sed -n 's,^.*\([2-9][0-9][0-9][0-9]\)[-]*\([01][0-9]\)[-]*\([0-3][0-9]\).*$,\1\2\3,p'`
    ld_vers_major=`expr "$ld_vers" : '\([0-9]*\)'`
    ld_vers_minor=`expr "$ld_vers" : '[0-9]*\.\([0-9]*\)'`
    ld_vers_patch=`expr "$ld_vers" : '[0-9]*\.[0-9]*\.\([0-9]*\)'`
  else
    case "${target}" in
      *-*-solaris2*)
	# See acinclude.m4 (gcc_SUN_LD_VERSION) for the version number
	# format.
	#
	# Don't reuse gcc_gv_sun_ld_vers_* in case a linker other than
	# /usr/ccs/bin/ld has been configured.
	ld_ver=`$gcc_cv_ld -V 2>&1`
	if echo "$ld_ver" | grep 'Solaris Link Editors' > /dev/null; then
	  ld_vers=`echo $ld_ver | sed -n \
	    -e 's,^.*: 5\.[0-9][0-9]*-\([0-9]\.[0-9][0-9]*\).*$,\1,p'`
	  ld_vers_major=`expr "$ld_vers" : '\([0-9]*\)'`
	  ld_vers_minor=`expr "$ld_vers" : '[0-9]*\.\([0-9]*\)'`
	fi
	;;
    esac
  fi
fi
changequote([,])dnl

AC_CACHE_CHECK(linker for .hidden support, gcc_cv_ld_hidden,
[[if test $in_tree_ld = yes ; then
  gcc_cv_ld_hidden=no
  if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 13 -o "$gcc_cv_gld_major_version" -gt 2 \
     && test $in_tree_ld_is_elf = yes; then
     gcc_cv_ld_hidden=yes
  fi
else
  gcc_cv_ld_hidden=yes
  if test x"$ld_is_gold" = xyes; then
    :
  elif echo "$ld_ver" | grep GNU > /dev/null; then
    case "${target}" in
      mmix-knuth-mmixware)
        # The linker emits by default mmo, not ELF, so "no" is appropriate.
	gcc_cv_ld_hidden=no
	;;
    esac
    if test 0"$ld_date" -lt 20020404; then
      if test -n "$ld_date"; then
	# If there was date string, but was earlier than 2002-04-04, fail
	gcc_cv_ld_hidden=no
      elif test -z "$ld_vers"; then
	# If there was no date string nor ld version number, something is wrong
	gcc_cv_ld_hidden=no
      else
	test -z "$ld_vers_patch" && ld_vers_patch=0
	if test "$ld_vers_major" -lt 2; then
	  gcc_cv_ld_hidden=no
	elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 12; then
	  gcc_cv_ld_hidden="no"
	elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -eq 12 -a "$ld_vers_patch" -eq 0; then
	  gcc_cv_ld_hidden=no
	fi
      fi
    fi
  else
    case "${target}" in
      *-*-darwin*)
	# Darwin ld has some visibility support.
	gcc_cv_ld_hidden=yes
        ;;
      hppa64*-*-hpux* | ia64*-*-hpux*)
	gcc_cv_ld_hidden=yes
	;;
      *-*-solaris2.9* | *-*-solaris2.1[0-9]*)
	# Support for .hidden in Sun ld appeared in Solaris 9 FCS, but
	# .symbolic was only added in Solaris 9 12/02.
        gcc_cv_ld_hidden=yes
	;;
      *)
	gcc_cv_ld_hidden=no
	;;
    esac
  fi
fi]])
libgcc_visibility=no
AC_SUBST(libgcc_visibility)
GCC_TARGET_TEMPLATE([HAVE_GAS_HIDDEN])
if test $gcc_cv_as_hidden = yes && test $gcc_cv_ld_hidden = yes; then
  libgcc_visibility=yes
  AC_DEFINE(HAVE_GAS_HIDDEN, 1,
  [Define if your assembler and linker support .hidden.])
fi

AC_MSG_CHECKING(linker read-only and read-write section mixing)
gcc_cv_ld_ro_rw_mix=unknown
if test $in_tree_ld = yes ; then
  if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 10 -o "$gcc_cv_gld_major_version" -gt 2 \
     && test $in_tree_ld_is_elf = yes; then
    gcc_cv_ld_ro_rw_mix=read-write
  fi
elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x ; then
  echo '.section myfoosect, "a"' > conftest1.s
  echo '.section myfoosect, "aw"' > conftest2.s
  echo '.byte 1' >> conftest2.s
  echo '.section myfoosect, "a"' > conftest3.s
  echo '.byte 0' >> conftest3.s
  if $gcc_cv_as -o conftest1.o conftest1.s > /dev/null 2>&1 \
     && $gcc_cv_as -o conftest2.o conftest2.s > /dev/null 2>&1 \
     && $gcc_cv_as -o conftest3.o conftest3.s > /dev/null 2>&1 \
     && $gcc_cv_ld -shared -o conftest1.so conftest1.o \
	conftest2.o conftest3.o > /dev/null 2>&1; then
    gcc_cv_ld_ro_rw_mix=`$gcc_cv_objdump -h conftest1.so \
			 | sed -e '/myfoosect/!d' -e N`
    if echo "$gcc_cv_ld_ro_rw_mix" | grep CONTENTS > /dev/null; then
      if echo "$gcc_cv_ld_ro_rw_mix" | grep READONLY > /dev/null; then
	gcc_cv_ld_ro_rw_mix=read-only
      else
	gcc_cv_ld_ro_rw_mix=read-write
      fi
    fi
  fi
changequote(,)dnl
  rm -f conftest.* conftest[123].*
changequote([,])dnl
fi
if test x$gcc_cv_ld_ro_rw_mix = xread-write; then
	AC_DEFINE(HAVE_LD_RO_RW_SECTION_MIXING, 1,
  [Define if your linker links a mix of read-only
   and read-write sections into a read-write section.])
fi
AC_MSG_RESULT($gcc_cv_ld_ro_rw_mix)

gcc_AC_INITFINI_ARRAY

# Check if we have .[us]leb128, and support symbol arithmetic with it.
gcc_GAS_CHECK_FEATURE([.sleb128 and .uleb128], gcc_cv_as_leb128,
  [elf,2,11,0],,
[	.data
	.uleb128 L2 - L1
L1:
	.uleb128 1280
	.sleb128 -1010
L2:],
[[# GAS versions before 2.11 do not support uleb128,
  # despite appearing to.
  # ??? There exists an elf-specific test that will crash
  # the assembler.  Perhaps it's better to figure out whether
  # arbitrary sections are supported and try the test.
  as_ver=`$gcc_cv_as --version 2>/dev/null | sed 1q`
  if echo "$as_ver" | grep GNU > /dev/null; then
    as_vers=`echo $as_ver | sed -n \
	-e 's,^.*[	 ]\([0-9][0-9]*\.[0-9][0-9]*.*\)$,\1,p'`
    as_major=`expr "$as_vers" : '\([0-9]*\)'`
    as_minor=`expr "$as_vers" : '[0-9]*\.\([0-9]*\)'`
    if test $as_major -eq 2 && test $as_minor -lt 11
    then :
    else gcc_cv_as_leb128=yes
    fi
  fi]],
  [AC_DEFINE(HAVE_AS_LEB128, 1,
    [Define if your assembler supports .sleb128 and .uleb128.])])

# Check if we have assembler support for unwind directives.
gcc_GAS_CHECK_FEATURE([cfi directives], gcc_cv_as_cfi_directive,
  ,,
[	.text
	.cfi_startproc
	.cfi_offset 0, 0
	.cfi_same_value 1
	.cfi_def_cfa 1, 2
	.cfi_escape 1, 2, 3, 4, 5
	.cfi_endproc],
[case "$target" in
  *-*-solaris*)
    # If the linker used on Solaris (like Sun ld) isn't capable of merging
    # read-only and read-write sections, we need to make sure that the
    # assembler used emits read-write .eh_frame sections.
    if test "x$gcc_cv_ld_ro_rw_mix" != xread-write; then
      if test "x$gcc_cv_objdump" != x; then
	if $gcc_cv_objdump -h conftest.o 2>/dev/null | \
		sed -e /.eh_frame/!d -e N | grep READONLY > /dev/null; then
	  gcc_cv_as_cfi_directive=no
	else
	  case "$target" in
	    i?86-*-solaris2.1[[0-9]]* | x86_64-*-solaris2.1[[0-9]]*)
	      # On Solaris/x86, make sure that GCC and gas agree on using
	      # read-only .eh_frame sections for 64-bit.
	      if $gcc_cv_as --64 -o conftest.o conftest.s > /dev/null 2>&1 && \
		$gcc_cv_objdump -h conftest.o 2>/dev/null | \
			sed -e /.eh_frame/!d -e N | \
			grep READONLY > /dev/null; then
		gcc_cv_as_cfi_directive=yes
	      else
		gcc_cv_as_cfi_directive=no
	      fi
	      ;;
	    *)
	      gcc_cv_as_cfi_directive=yes
	      ;;
	  esac 
	fi
      else
        # no objdump, err on the side of caution
	gcc_cv_as_cfi_directive=no
      fi
    else
      gcc_cv_as_cfi_directive=yes
    fi
    ;;
  *-*-*)
    gcc_cv_as_cfi_directive=yes
    ;;
esac])
if test $gcc_cv_as_cfi_directive = yes && test x$gcc_cv_objdump != x; then
gcc_GAS_CHECK_FEATURE([working cfi advance], gcc_cv_as_cfi_advance_working,
  ,,
[	.text
	.cfi_startproc
	.cfi_adjust_cfa_offset 64
	.skip 75040, 0
	.cfi_adjust_cfa_offset 128
	.cfi_endproc],
[[
if $gcc_cv_objdump -Wf conftest.o 2>/dev/null \
    | grep 'DW_CFA_advance_loc[24]:[ 	][ 	]*75040[ 	]' >/dev/null; then
   gcc_cv_as_cfi_advance_working=yes
fi
]])
else
  # no objdump, err on the side of caution
  gcc_cv_as_cfi_advance_working=no
fi
GCC_TARGET_TEMPLATE(HAVE_GAS_CFI_DIRECTIVE)
AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_DIRECTIVE,
  [`if test $gcc_cv_as_cfi_directive = yes \
       && test $gcc_cv_as_cfi_advance_working = yes; then echo 1; else echo 0; fi`],
  [Define 0/1 if your assembler supports CFI directives.])

GCC_TARGET_TEMPLATE(HAVE_GAS_CFI_PERSONALITY_DIRECTIVE)
gcc_GAS_CHECK_FEATURE([cfi personality directive],
  gcc_cv_as_cfi_personality_directive, ,,
[	.text
	.cfi_startproc
	.cfi_personality 0, symbol
	.cfi_endproc])
AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_PERSONALITY_DIRECTIVE,
  [`if test $gcc_cv_as_cfi_personality_directive = yes;
    then echo 1; else echo 0; fi`],
  [Define 0/1 if your assembler supports .cfi_personality.])

gcc_GAS_CHECK_FEATURE([cfi sections directive],
  gcc_cv_as_cfi_sections_directive, ,,
[	.text
	.cfi_sections .debug_frame, .eh_frame
	.cfi_startproc
	.cfi_endproc],
[case $target_os in
  win32 | pe | cygwin* | mingw32* | uwin*)
    # Need to check that we generated the correct relocation for the
    # .debug_frame section.  This was fixed for binutils 2.21.
    gcc_cv_as_cfi_sections_directive=no
    if test "x$gcc_cv_objdump" != x; then
     if $gcc_cv_objdump -j .debug_frame -r conftest.o 2>/dev/null | \
	grep secrel > /dev/null; then
      gcc_cv_as_cfi_sections_directive=yes
     fi
    fi
    ;;
  *)
    gcc_cv_as_cfi_sections_directive=yes
    ;;
esac])
GCC_TARGET_TEMPLATE(HAVE_GAS_CFI_SECTIONS_DIRECTIVE)
AC_DEFINE_UNQUOTED(HAVE_GAS_CFI_SECTIONS_DIRECTIVE,
  [`if test $gcc_cv_as_cfi_sections_directive = yes;
    then echo 1; else echo 0; fi`],
  [Define 0/1 if your assembler supports .cfi_sections.])

# GAS versions up to and including 2.11.0 may mis-optimize
# .eh_frame data.
gcc_GAS_CHECK_FEATURE(eh_frame optimization, gcc_cv_as_eh_frame,
  [elf,2,12,0],,
[	.text
.LFB1:
	.4byte	0
.L1:
	.4byte	0
.LFE1:
	.section	.eh_frame,"aw",@progbits
__FRAME_BEGIN__:
	.4byte	.LECIE1-.LSCIE1
.LSCIE1:
	.4byte	0x0
	.byte	0x1
	.ascii "z\0"
	.byte	0x1
	.byte	0x78
	.byte	0x1a
	.byte	0x0
	.byte	0x4
	.4byte	1
	.p2align 1
.LECIE1:
.LSFDE1:
	.4byte	.LEFDE1-.LASFDE1
.LASFDE1:
	.4byte	.LASFDE1-__FRAME_BEGIN__
	.4byte	.LFB1
	.4byte	.LFE1-.LFB1
	.byte	0x4
	.4byte	.LFE1-.LFB1
	.byte	0x4
	.4byte	.L1-.LFB1
.LEFDE1:],
[  dnl # For autoconf 2.5x, must protect trailing spaces with @&t@.
cat > conftest.lit <<EOF
 0000 10000000 00000000 017a0001 781a0004  .........z..x...
 0010 01000000 12000000 18000000 00000000  ................
 0020 08000000 04080000 0044               .........D      @&t@
EOF
cat > conftest.big <<EOF
 0000 00000010 00000000 017a0001 781a0004  .........z..x...
 0010 00000001 00000012 00000018 00000000  ................
 0020 00000008 04000000 0844               .........D      @&t@
EOF
  # If the assembler didn't choke, and we can objdump,
  # and we got the correct data, then succeed.
  # The text in the here-document typically retains its unix-style line
  # endings, while the output of objdump will use host line endings.
  # Therefore, use diff -b for the comparisons.
  if test x$gcc_cv_objdump != x \
  && $gcc_cv_objdump -s -j .eh_frame conftest.o 2>/dev/null \
     | tail -3 > conftest.got \
  && { diff -b conftest.lit conftest.got > /dev/null 2>&1 \
    || diff -b conftest.big conftest.got > /dev/null 2>&1; }
  then
    gcc_cv_as_eh_frame=yes
  elif AC_TRY_COMMAND($gcc_cv_as -o conftest.o --traditional-format /dev/null); then
    gcc_cv_as_eh_frame=buggy
  else
    # Uh oh, what do we do now?
    gcc_cv_as_eh_frame=no
  fi])

if test $gcc_cv_as_eh_frame = buggy; then
  AC_DEFINE(USE_AS_TRADITIONAL_FORMAT, 1,
  [Define if your assembler mis-optimizes .eh_frame data.])
fi

gcc_GAS_CHECK_FEATURE(section merging support, gcc_cv_as_shf_merge,
 [elf,2,12,0], [--fatal-warnings],
 [.section .rodata.str, "aMS", @progbits, 1])
if test $gcc_cv_as_shf_merge = no; then
  gcc_GAS_CHECK_FEATURE(section merging support, gcc_cv_as_shf_merge,
    [elf,2,12,0], [--fatal-warnings],
    [.section .rodata.str, "aMS", %progbits, 1])
fi
AC_DEFINE_UNQUOTED(HAVE_GAS_SHF_MERGE,
  [`if test $gcc_cv_as_shf_merge = yes; then echo 1; else echo 0; fi`],
[Define 0/1 if your assembler supports marking sections with SHF_MERGE flag.])

gcc_GAS_CHECK_FEATURE([COMDAT group support (GNU as)],
 gcc_cv_as_comdat_group,
 [elf,2,16,0], [--fatal-warnings],
 [.section .text,"axG",@progbits,.foo,comdat])
if test $gcc_cv_as_comdat_group = yes; then
  gcc_cv_as_comdat_group_percent=no
  gcc_cv_as_comdat_group_group=no
else
 gcc_GAS_CHECK_FEATURE([COMDAT group support (GNU as, %type)],
   gcc_cv_as_comdat_group_percent,
   [elf,2,16,0], [--fatal-warnings],
   [.section .text,"axG",%progbits,.foo,comdat])
 if test $gcc_cv_as_comdat_group_percent = yes; then
   gcc_cv_as_comdat_group_group=no
 else
   if test -z "${gcc_cv_as_comdat_group_group+set}"; then
     gcc_cv_as_comdat_group_group=no
   fi
   case "${target}" in
     # Sun as uses a completely different syntax.
     *-*-solaris2*)
       case "${target}" in
         sparc*-*-solaris2*)
           conftest_s='
               .group foo,".text%foo",#comdat
               .section ".text%foo", #alloc,#execinstr,#progbits
               .globl foo
             foo:
	     '
           ;;
         i?86-*-solaris2* | x86_64-*-solaris2.1[[0-9]]*)
	   conftest_s='
               .group foo,.text%foo,#comdat
               .section .text%foo, "ax", @progbits
               .globl  foo
             foo:
	     '
	   ;;
       esac
       gcc_GAS_CHECK_FEATURE([COMDAT group support (Sun as, .group)],
         gcc_cv_as_comdat_group_group,
         ,, [$conftest_s])
       ;;
   esac
 fi
fi
if test x"$ld_is_gold" = xyes; then
  comdat_group=yes
elif test $in_tree_ld = yes ; then
  comdat_group=no
  if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 \
     && test $in_tree_ld_is_elf = yes; then
     comdat_group=yes
  fi
elif echo "$ld_ver" | grep GNU > /dev/null; then
  comdat_group=yes
  if test 0"$ld_date" -lt 20050308; then
    if test -n "$ld_date"; then
      # If there was date string, but was earlier than 2005-03-08, fail
      comdat_group=no
    elif test "$ld_vers_major" -lt 2; then
      comdat_group=no
    elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 16; then
      comdat_group=no
    fi
  fi
else
changequote(,)dnl
  case "${target}" in
    *-*-solaris2.1[1-9]*)
      comdat_group=no
      # Sun ld has COMDAT group support since Solaris 9, but it doesn't
      # interoperate with GNU as until Solaris 11 build 130, i.e. ld
      # version 1.688.
      #
      # If using Sun as for COMDAT group as emitted by GCC, one needs at
      # least ld version 1.2267.
      if test "$ld_vers_major" -gt 1; then
        comdat_group=yes
      elif test "x$gas_flag" = xyes && test "$ld_vers_minor" -ge 1688; then
	comdat_group=yes
      elif test "$ld_vers_minor" -ge 2267; then
	comdat_group=yes
      fi
      ;;
    *)
      # Assume linkers other than GNU ld don't support COMDAT group.
      comdat_group=no
      ;;
  esac
changequote([,])dnl
fi
# Allow overriding the automatic COMDAT group tests above.
AC_ARG_ENABLE(comdat,
  [AS_HELP_STRING([--enable-comdat], [enable COMDAT group support])],
  [comdat_group="$enable_comdat"])
if test $comdat_group = no; then
  gcc_cv_as_comdat_group=no
  gcc_cv_as_comdat_group_percent=no
  gcc_cv_as_comdat_group_group=no
fi
AC_DEFINE_UNQUOTED(HAVE_COMDAT_GROUP,
  [`if test $gcc_cv_as_comdat_group = yes \
    || test $gcc_cv_as_comdat_group_percent = yes \
    || test $gcc_cv_as_comdat_group_group = yes; then echo 1; else echo 0; fi`],
[Define 0/1 if your assembler and linker support COMDAT groups.])

gcc_GAS_CHECK_FEATURE([line table discriminator support],
 gcc_cv_as_discriminator,
 [2,19,51],,
[	.text
	.file 1 "conf.c"
	.loc 1 1 0 discriminator 1],,
[AC_DEFINE(HAVE_GAS_DISCRIMINATOR, 1,
  [Define if your assembler supports the .loc discriminator sub-directive.])])

# Thread-local storage - the check is heavily parameterized.
conftest_s=
tls_first_major=
tls_first_minor=
tls_as_opt=
case "$target" in
changequote(,)dnl
  alpha*-*-*)
    conftest_s='
	.section ".tdata","awT",@progbits
foo:	.long	25
	.text
	ldq	$27,__tls_get_addr($29)		!literal!1
	lda	$16,foo($29)			!tlsgd!1
	jsr	$26,($27),__tls_get_addr	!lituse_tlsgd!1
	ldq	$27,__tls_get_addr($29)		!literal!2
	lda	$16,foo($29)			!tlsldm!2
	jsr	$26,($27),__tls_get_addr	!lituse_tlsldm!2
	ldq	$1,foo($29)			!gotdtprel
	ldah	$2,foo($29)			!dtprelhi
	lda	$3,foo($2)			!dtprello
	lda	$4,foo($29)			!dtprel
	ldq	$1,foo($29)			!gottprel
	ldah	$2,foo($29)			!tprelhi
	lda	$3,foo($2)			!tprello
	lda	$4,foo($29)			!tprel'
	tls_first_major=2
	tls_first_minor=13
	tls_as_opt=--fatal-warnings
	;;
  cris-*-*|crisv32-*-*)
    conftest_s='
	.section ".tdata","awT",@progbits
x:      .long   25
        .text
	move.d x:IE,$r10
	nop'
	tls_first_major=2
	tls_first_minor=20
	tls_as_opt=--fatal-warnings
	;;
  frv*-*-*)
    conftest_s='
	.section ".tdata","awT",@progbits
x:      .long   25
        .text
        call    #gettlsoff(x)'
	tls_first_major=2
	tls_first_minor=14
	;;
  hppa*-*-linux*)
    conftest_s='
t1:	.reg	%r20
t2:	.reg	%r21
gp:	.reg	%r19
	.section ".tdata","awT",@progbits
foo:	.long	25
	.text
	.align	4
	addil LT%foo-$tls_gdidx$,gp
	ldo RT%foo-$tls_gdidx$(%r1),%arg0
	b __tls_get_addr
	nop 		
	addil LT%foo-$tls_ldidx$,gp
	b __tls_get_addr
	ldo RT%foo-$tls_ldidx$(%r1),%arg0
	addil LR%foo-$tls_dtpoff$,%ret0
	ldo RR%foo-$tls_dtpoff$(%r1),%t1
	mfctl %cr27,%t1 		
	addil LT%foo-$tls_ieoff$,gp
	ldw RT%foo-$tls_ieoff$(%r1),%t2
	add %t1,%t2,%t3 		
	mfctl %cr27,%t1 		
	addil LR%foo-$tls_leoff$,%t1
	ldo RR%foo-$tls_leoff$(%r1),%t2'
	tls_first_major=2
	tls_first_minor=15
	tls_as_opt=--fatal-warnings
	;;
  arm*-*-*)
    conftest_s='
	.section ".tdata","awT",%progbits
foo:	.long	25
	.text
.word foo(gottpoff)
.word foo(tpoff)
.word foo(tlsgd)
.word foo(tlsldm)
.word foo(tlsldo)'
	tls_first_major=2
	tls_first_minor=17
	;;
  i[34567]86-*-* | x86_64-*-solaris2.1[0-9]*)
    case "$target" in
      i[34567]86-*-solaris2.*)
	on_solaris=yes
	tga_func=___tls_get_addr
	;;
      x86_64-*-solaris2.1[0-9]*)
	on_solaris=yes
	tga_func=__tls_get_addr
        ;;
      *)
	on_solaris=no
	;;
    esac
    if test x$on_solaris = xyes && test x$gas_flag = xno; then
      conftest_s='
	.section .tdata,"awt",@progbits'
      tls_first_major=0
      tls_first_minor=0
      tls_section_flag=t
changequote([,])dnl
      AC_DEFINE(TLS_SECTION_ASM_FLAG, 't',
[Define to the flag used to mark TLS sections if the default (`T') doesn't work.])
changequote(,)dnl
    else
      conftest_s='
	.section ".tdata","awT",@progbits'
      tls_first_major=2
      tls_first_minor=14
      tls_section_flag=T
      tls_as_opt="--fatal-warnings"
    fi
    conftest_s="$conftest_s
foo:	.long	25
	.text
	movl	%gs:0, %eax
	leal	foo@tlsgd(,%ebx,1), %eax
	leal	foo@tlsldm(%ebx), %eax
	leal	foo@dtpoff(%eax), %edx
	movl	foo@gottpoff(%ebx), %eax
	subl	foo@gottpoff(%ebx), %eax
	addl	foo@gotntpoff(%ebx), %eax
	movl	foo@indntpoff, %eax
	movl	\$foo@tpoff, %eax
	subl	\$foo@tpoff, %eax
	leal	foo@ntpoff(%ecx), %eax"
    ;;
  x86_64-*-*)
    conftest_s='
	.section ".tdata","awT",@progbits
foo:	.long	25
	.text
	movq	%fs:0, %rax
	leaq	foo@TLSGD(%rip), %rdi
	leaq	foo@TLSLD(%rip), %rdi
	leaq	foo@DTPOFF(%rax), %rdx
	movq	foo@GOTTPOFF(%rip), %rax
	movq	$foo@TPOFF, %rax'
	tls_first_major=2
	tls_first_minor=14
	tls_section_flag=T
	tls_as_opt=--fatal-warnings
	;;
  ia64-*-*)
    conftest_s='
	.section ".tdata","awT",@progbits
foo:	data8	25
	.text
	addl	r16 = @ltoff(@dtpmod(foo#)), gp
	addl	r17 = @ltoff(@dtprel(foo#)), gp
	addl	r18 = @ltoff(@tprel(foo#)), gp
	addl	r19 = @dtprel(foo#), gp
	adds	r21 = @dtprel(foo#), r13
	movl	r23 = @dtprel(foo#)
	addl	r20 = @tprel(foo#), gp
	adds	r22 = @tprel(foo#), r13
	movl	r24 = @tprel(foo#)'
	tls_first_major=2
	tls_first_minor=13
	tls_as_opt=--fatal-warnings
	;;
  microblaze*-*-*)
    conftest_s='
	.section .tdata,"awT",@progbits
x:
	.word 2
	.text
	addik r5,r20,x@TLSGD
	addik r5,r20,x@TLSLDM'
	tls_first_major=2
	tls_first_minor=20
	tls_as_opt='--fatal-warnings'
	;;
  mips*-*-*)
    conftest_s='
	.section .tdata,"awT",@progbits
x:
	.word 2
	.text
	addiu $4, $28, %tlsgd(x)
	addiu $4, $28, %tlsldm(x)
	lui $4, %dtprel_hi(x)
	addiu $4, $4, %dtprel_lo(x)
	lw $4, %gottprel(x)($28)
	lui $4, %tprel_hi(x)
	addiu $4, $4, %tprel_lo(x)'
	tls_first_major=2
	tls_first_minor=16
	tls_as_opt='-32 --fatal-warnings'
	;;
  m68k-*-*)
    conftest_s='
	.section .tdata,"awT",@progbits
x:
	.word 2
	.text
foo:
	move.l x@TLSGD(%a5),%a0
	move.l x@TLSLDM(%a5),%a0
	move.l x@TLSLDO(%a5),%a0
	move.l x@TLSIE(%a5),%a0
	move.l x@TLSLE(%a5),%a0'
	tls_first_major=2
	tls_first_minor=19
	tls_as_opt='--fatal-warnings'
	;;
  nios2-*-*)
      conftest_s='
	.section ".tdata","awT",@progbits'
	tls_first_major=2
	tls_first_minor=23
	tls_as_opt="--fatal-warnings"
	;;
  aarch64*-*-*)
    conftest_s='
	.section ".tdata","awT",%progbits
foo:	.long	25
	.text
	adrp  x0, :tlsgd:x
	add   x0, x0, #:tlsgd_lo12:x
        bl    __tls_get_addr
	nop'
	tls_first_major=2
	tls_first_minor=20
	tls_as_opt='--fatal-warnings'
	;;
  powerpc-ibm-aix*)
    conftest_s='
	.extern __get_tpointer
	.toc
LC..1:
	.tc a[TC],a[TL]@le
	.csect .text[PR]
.tlstest:
	lwz 9,LC..1(2)
	bla __get_tpointer
	lwzx 3,9,3
	.globl a
	.csect a[TL],4
a:
	.space 4'
	tls_first_major=0
	tls_first_minor=0
	;;
  powerpc64*-*-*)
    conftest_s='
	.section ".tdata","awT",@progbits
	.align 3
ld0:	.space 8
ld1:	.space 8
x1:	.space 8
x2:	.space 8
x3:	.space 8
	.text
	addi 3,2,ld0@got@tlsgd
	bl .__tls_get_addr
	nop
	addi 3,2,ld1@toc
	bl .__tls_get_addr
	nop
	addi 3,2,x1@got@tlsld
	bl .__tls_get_addr
	nop
	addi 9,3,x1@dtprel
	bl .__tls_get_addr
	nop
	addis 9,3,x2@dtprel@ha
	addi 9,9,x2@dtprel@l
	bl .__tls_get_addr
	nop
	ld 9,x3@got@dtprel(2)
	add 9,9,3
	bl .__tls_get_addr
	nop'
	tls_first_major=2
	tls_first_minor=14
	tls_as_opt="-a64 --fatal-warnings"
	;;
  powerpc*-*-*)
    conftest_s='
	.section ".tdata","awT",@progbits
	.align 2
ld0:	.space 4
ld1:	.space 4
x1:	.space 4
x2:	.space 4
x3:	.space 4
	.text
	addi 3,31,ld0@got@tlsgd
	bl __tls_get_addr
	addi 3,31,x1@got@tlsld
	bl __tls_get_addr
	addi 9,3,x1@dtprel
	addis 9,3,x2@dtprel@ha
	addi 9,9,x2@dtprel@l
	lwz 9,x3@got@tprel(31)
	add 9,9,x@tls
	addi 9,2,x1@tprel
	addis 9,2,x2@tprel@ha
	addi 9,9,x2@tprel@l'
	tls_first_major=2
	tls_first_minor=14
	tls_as_opt="-a32 --fatal-warnings"
	;;
  s390-*-*)
    conftest_s='
	.section ".tdata","awT",@progbits
foo:	.long	25
	.text
	.long	foo@TLSGD
	.long	foo@TLSLDM
	.long	foo@DTPOFF
	.long	foo@NTPOFF
	.long	foo@GOTNTPOFF
	.long	foo@INDNTPOFF
	l	%r1,foo@GOTNTPOFF(%r12)
	l	%r1,0(%r1):tls_load:foo
	bas	%r14,0(%r1,%r13):tls_gdcall:foo
	bas	%r14,0(%r1,%r13):tls_ldcall:foo'
	tls_first_major=2
	tls_first_minor=14
	tls_as_opt="-m31 --fatal-warnings"
	;;
  s390x-*-*)
    conftest_s='
	.section ".tdata","awT",@progbits
foo:	.long	25
	.text
	.quad	foo@TLSGD
	.quad	foo@TLSLDM
	.quad	foo@DTPOFF
	.quad	foo@NTPOFF
	.quad	foo@GOTNTPOFF
	lg	%r1,foo@GOTNTPOFF(%r12)
	larl	%r1,foo@INDNTPOFF
	brasl	%r14,__tls_get_offset@PLT:tls_gdcall:foo
	brasl	%r14,__tls_get_offset@PLT:tls_ldcall:foo'
	tls_first_major=2
	tls_first_minor=14
	tls_as_opt="-m64 -Aesame --fatal-warnings"
	;;
  sh-*-* | sh[34]-*-*)
    conftest_s='
	.section ".tdata","awT",@progbits
foo:	.long	25
	.text
	.long	foo@TLSGD
	.long	foo@TLSLDM
	.long	foo@DTPOFF
	.long	foo@GOTTPOFF
	.long	foo@TPOFF'
	tls_first_major=2
	tls_first_minor=13
	tls_as_opt=--fatal-warnings
	;;
  sparc*-*-*)
    case "$target" in
      sparc*-sun-solaris2.*)
	on_solaris=yes
	tga_func=__tls_get_addr
	;;
      *)
	on_solaris=no
	;;
    esac
    if test x$on_solaris = xyes && test x$gas_flag = xno; then
      conftest_s='
	.section ".tdata",#alloc,#write,#tls'
	tls_first_major=0
	tls_first_minor=0
    else
      conftest_s='
	.section ".tdata","awT",@progbits'
	tls_first_major=2
	tls_first_minor=14
	tls_as_opt="-32 --fatal-warnings"
    fi
    conftest_s="$conftest_s
foo:	.long	25
	.text
	sethi	%tgd_hi22(foo), %o0
	add	%o0, %tgd_lo10(foo), %o1
	add	%l7, %o1, %o0, %tgd_add(foo)
	call	__tls_get_addr, %tgd_call(foo)
	sethi	%tldm_hi22(foo), %l1
	add	%l1, %tldm_lo10(foo), %l2
	add	%l7, %l2, %o0, %tldm_add(foo)
	call	__tls_get_addr, %tldm_call(foo)
	sethi	%tldo_hix22(foo), %l3
	xor	%l3, %tldo_lox10(foo), %l4
	add	%o0, %l4, %l5, %tldo_add(foo)
	sethi	%tie_hi22(foo), %o3
	add	%o3, %tie_lo10(foo), %o3
	ld	[%l7 + %o3], %o2, %tie_ld(foo)
	add	%g7, %o2, %o4, %tie_add(foo)
	sethi	%tle_hix22(foo), %l1
	xor	%l1, %tle_lox10(foo), %o5
	ld	[%g7 + %o5], %o1"
	;;
  tilepro*-*-*)
      conftest_s='
	.section ".tdata","awT",@progbits
foo:	.long	25
	.text
	addli	r0, zero, tls_gd(foo)
	auli	r0, zero, tls_gd_ha16(foo)
	addli	r0, r0, tls_gd_lo16(foo)
	jal	__tls_get_addr
	addli	r0, zero, tls_ie(foo)
	auli	r0, r0, tls_ie_ha16(foo)
	addli	r0, r0, tls_ie_lo16(foo)'
	tls_first_major=2
	tls_first_minor=22
	tls_as_opt="--fatal-warnings"
	;;
  tilegx*-*-*)
      conftest_s='
	.section ".tdata","awT",@progbits
foo:	.long	25
	.text
	shl16insli r0, zero, hw0_last_tls_gd(foo)
	shl16insli r0, zero, hw1_last_tls_gd(foo)
	shl16insli r0, r0,   hw0_tls_gd(foo)
	jal	   __tls_get_addr
	shl16insli r0, zero, hw1_last_tls_ie(foo)
	shl16insli r0, r0,   hw0_tls_ie(foo)'
	tls_first_major=2
	tls_first_minor=22
	tls_as_opt="--fatal-warnings"
	;;
  xtensa*-*-*)
    conftest_s='
	.section ".tdata","awT",@progbits
foo:	.long	25
	.text
	movi	a8, foo@TLSFUNC
	movi	a10, foo@TLSARG
	callx8.tls a8, foo@TLSCALL'
	tls_first_major=2
	tls_first_minor=19
	;;
changequote([,])dnl
esac
set_have_as_tls=no
if test "x$enable_tls" = xno ; then
  : # TLS explicitly disabled.
elif test "x$enable_tls" = xyes ; then
  set_have_as_tls=yes # TLS explicitly enabled.
elif test -z "$tls_first_major"; then
  : # If we don't have a check, assume no support.
else
  gcc_GAS_CHECK_FEATURE(thread-local storage support, gcc_cv_as_tls,
  [$tls_first_major,$tls_first_minor,0], [$tls_as_opt], [$conftest_s],,
  [set_have_as_tls=yes])
fi
case "$target" in
  # TLS was introduced in the Solaris 9 FCS release.  Support for GNU-style
  # TLS on x86 was only introduced in Solaris 9 4/04, replacing the earlier
  # Sun style that Sun ld and GCC don't support any longer.
  *-*-solaris2.*)
    AC_MSG_CHECKING(linker and ld.so.1 TLS support)
    ld_tls_support=no
    # Check ld and ld.so.1 TLS support.
    if echo "$ld_ver" | grep GNU > /dev/null; then
      # Assume all interesting versions of GNU ld have TLS support.
      # FIXME: still need ld.so.1 support, i.e. ld version checks below.
      ld_tls_support=yes
    else
      case "$target" in
	# Solaris 9/x86 ld has GNU style TLS support since version 1.374.
        i?86-*-solaris2.9)
          min_tls_ld_vers_minor=374
          ;;
	# Solaris 9/SPARC and Solaris 10+ ld have TLS support since FCS.
        sparc*-*-solaris2.9 | *-*-solaris2.1[[0-9]]*)
	  min_tls_ld_vers_minor=343
          ;;
      esac
      if test "$ld_vers_major" -gt 1 || \
        test "$ld_vers_minor" -ge "$min_tls_ld_vers_minor"; then
 	ld_tls_support=yes
      else
        set_have_as_tls=no
      fi
    fi
    AC_MSG_RESULT($ld_tls_support)

    save_LIBS="$LIBS"
    save_LDFLAGS="$LDFLAGS"
    LIBS=
    LDFLAGS=

    AC_MSG_CHECKING(library containing $tga_func)
    # Before Solaris 10, __tls_get_addr (SPARC/x64) resp. ___tls_get_addr
    # (32-bit x86) only lived in libthread, so check for that.  Keep
    # set_have_as_tls if found, disable if not.
    AC_SEARCH_LIBS([$tga_func], [thread],, [set_have_as_tls=no])
    ld_tls_libs="$LIBS"
    # Clear LIBS if we cannot support TLS.
    if test $set_have_as_tls = no; then
      LIBS=
    fi
    # Always define LIB_TLS_SPEC, even without TLS support.
    AC_DEFINE_UNQUOTED(LIB_TLS_SPEC, "$LIBS",
        [Define to the library containing __tls_get_addr/___tls_get_addr.])
    AC_MSG_RESULT($LIBS)

    LIBS="$save_LIBS"
    LDFLAGS="$save_LDFLAGS"
    ;;
esac
if test $set_have_as_tls = yes ; then
  AC_DEFINE(HAVE_AS_TLS, 1,
	    [Define if your assembler and linker support thread-local storage.])
fi

# Target-specific assembler checks.

AC_MSG_CHECKING(linker -Bstatic/-Bdynamic option)
gcc_cv_ld_static_dynamic=no
gcc_cv_ld_static_option='-Bstatic'
gcc_cv_ld_dynamic_option='-Bdynamic'
if test $in_tree_ld = yes ; then
  if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 10 -o "$gcc_cv_gld_major_version" -gt 2; then
    gcc_cv_ld_static_dynamic=yes
  fi
elif test x$gcc_cv_ld != x; then
  # Check if linker supports -Bstatic/-Bdynamic option
  if $gcc_cv_ld --help 2>/dev/null | grep -- -Bstatic > /dev/null \
     && $gcc_cv_ld --help 2>/dev/null | grep -- -Bdynamic > /dev/null; then
      gcc_cv_ld_static_dynamic=yes
  else
    case "$target" in
      # AIX ld uses -b flags
      *-*-aix4.[[23]]* | *-*-aix[[5-9]]*)
	gcc_cv_ld_static_dynamic=yes
	gcc_cv_ld_static_option="-bstatic"
	gcc_cv_ld_dynamic_option="-bdynamic"
	;;
      # HP-UX ld uses -a flags to select between shared and archive.
      *-*-hpux*)
	if test x"$gnu_ld" = xno; then
	  gcc_cv_ld_static_dynamic=yes
	  gcc_cv_ld_static_option="-aarchive_shared"
	  gcc_cv_ld_dynamic_option="-adefault"
	fi
	;;
      # Solaris 2 ld always supports -Bstatic/-Bdynamic.
      *-*-solaris2*)
        gcc_cv_ld_static_dynamic=yes
        ;;
    esac
  fi
fi
if test x"$gcc_cv_ld_static_dynamic" = xyes; then
	AC_DEFINE(HAVE_LD_STATIC_DYNAMIC, 1,
[Define if your linker supports -Bstatic/-Bdynamic or equivalent options.])
	AC_DEFINE_UNQUOTED(LD_STATIC_OPTION, "$gcc_cv_ld_static_option",
[Define to the linker option to disable use of shared objects.])
	AC_DEFINE_UNQUOTED(LD_DYNAMIC_OPTION, "$gcc_cv_ld_dynamic_option",
[Define to the linker option to enable use of shared objects.])
fi
AC_MSG_RESULT($gcc_cv_ld_static_dynamic)

if test x"$demangler_in_ld" = xyes; then
  AC_MSG_CHECKING(linker --demangle support)
  gcc_cv_ld_demangle=no
  if test $in_tree_ld = yes; then
    if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 14 -o "$gcc_cv_gld_major_version" -gt 2; then \
      gcc_cv_ld_demangle=yes
    fi
  elif test x$gcc_cv_ld != x -a x"$gnu_ld" = xyes; then
    # Check if the GNU linker supports --demangle option
    if $gcc_cv_ld --help 2>/dev/null | grep no-demangle > /dev/null; then
      gcc_cv_ld_demangle=yes
    fi
  fi
  if test x"$gcc_cv_ld_demangle" = xyes; then
    AC_DEFINE(HAVE_LD_DEMANGLE, 1,
[Define if your linker supports --demangle option.])
  fi
  AC_MSG_RESULT($gcc_cv_ld_demangle)
fi

AC_MSG_CHECKING(linker plugin support)
gcc_cv_lto_plugin=0
if test -f liblto_plugin.la; then
  save_ld_ver="$ld_ver"
  save_ld_vers_major="$ld_vers_major"
  save_ld_vers_minor="$ld_vers_minor"
  save_ld_is_gold="$ld_is_gold"

  ld_is_gold=no

  if test $in_tree_ld = yes -a x"$ORIGINAL_PLUGIN_LD_FOR_TARGET" = x"$gcc_cv_ld"; then
    ld_ver="GNU ld"
    # FIXME: ld_is_gold?
    ld_vers_major="$gcc_cv_gld_major_version"
    ld_vers_minor="$gcc_cv_gld_minor_version"
  else
    # Determine plugin linker version.
    # FIXME: Partial duplicate from above, generalize.
changequote(,)dnl
    ld_ver=`$ORIGINAL_PLUGIN_LD_FOR_TARGET --version 2>/dev/null | sed 1q`
    if echo "$ld_ver" | grep GNU > /dev/null; then
      if echo "$ld_ver" | grep "GNU gold" > /dev/null; then
        ld_is_gold=yes
        ld_vers=`echo $ld_ver | sed -n \
    	    -e 's,^[^)]*[	 ]\([0-9][0-9]*\.[0-9][0-9]*[^)]*\)) .*$,\1,p'`
      else
        ld_vers=`echo $ld_ver | sed -n \
    	    -e 's,^.*[	 ]\([0-9][0-9]*\.[0-9][0-9]*.*\)$,\1,p'`
      fi
      ld_vers_major=`expr "$ld_vers" : '\([0-9]*\)'`
      ld_vers_minor=`expr "$ld_vers" : '[0-9]*\.\([0-9]*\)'`
    fi
changequote([,])dnl
  fi

  # Determine plugin support.
  if echo "$ld_ver" | grep GNU > /dev/null; then
    # Require GNU ld or gold 2.21+ for plugin support by default.
    if test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -ge 21; then
      gcc_cv_lto_plugin=2
    # Allow -fuse-linker-plugin to enable plugin support in GNU gold 2.20.
    elif test "$ld_is_gold" = yes -a "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -eq 20; then
      gcc_cv_lto_plugin=1
    fi
  fi

  ld_ver="$save_ld_ver"
  ld_vers_major="$save_ld_vers_major"
  ld_vers_minor="$save_ld_vers_minor"
  ld_is_gold="$save_ld_is_gold"
fi
AC_DEFINE_UNQUOTED(HAVE_LTO_PLUGIN, $gcc_cv_lto_plugin,
  [Define to the level of your linker's plugin support.])
AC_MSG_RESULT($gcc_cv_lto_plugin)

case "$target" in
  aarch64*-*-*)
    gcc_GAS_CHECK_FEATURE([-mabi option], gcc_cv_as_aarch64_mabi,,
                          [-mabi=lp64], [.text],,,)
    if test x$gcc_cv_as_aarch64_mabi = xyes; then
      AC_DEFINE(HAVE_AS_MABI_OPTION, 1,
                [Define if your assembler supports the -mabi option.])
    else
      if test x$with_abi = xilp32; then
        AC_MSG_ERROR([Assembler does not support -mabi=ilp32.\
                     Upgrade the Assembler.])
      fi
      if test x"$with_multilib_list" = xdefault; then
        TM_MULTILIB_CONFIG=lp64
      else
        aarch64_multilibs=`echo $with_multilib_list | sed -e 's/,/ /g'`
        for aarch64_multilib in ${aarch64_multilibs}; do
          case ${aarch64_multilib} in
            ilp32)
              AC_MSG_ERROR([Assembler does not support -mabi=ilp32.\
                            Upgrade the Assembler.])
              ;;
            *)
              ;;
          esac
        done
      fi
    fi
    # Enable default workaround for AArch64 Cortex-A53 erratum 835769.
    AC_ARG_ENABLE(fix-cortex-a53-835769,
    [
AS_HELP_STRING([--enable-fix-cortex-a53-835769],
        [enable workaround for AArch64 Cortex-A53 erratum 835769 by default])
AS_HELP_STRING([--disable-fix-cortex-a53-835769],
        [disable workaround for AArch64 Cortex-A53 erratum 835769 by default])
    ],
      [
        case $enableval in
          yes)
            tm_defines="${tm_defines} TARGET_FIX_ERR_A53_835769_DEFAULT=1"
            ;;
          no)
            ;;
          *)
            AC_MSG_ERROR(['$enableval' is an invalid value for --enable-fix-cortex-a53-835769.\
  Valid choices are 'yes' and 'no'.])
            ;;

        esac
      ],
    [])
    ;;

  # All TARGET_ABI_OSF targets.
  alpha*-*-linux* | alpha*-*-*bsd*)
    gcc_GAS_CHECK_FEATURE([explicit relocation support],
	gcc_cv_as_alpha_explicit_relocs, [2,12,0],,
[	.set nomacro
	.text
	extbl	$3, $2, $3	!lituse_bytoff!1
	ldq	$2, a($29)	!literal!1
	ldq	$4, b($29)	!literal!2
	ldq_u	$3, 0($2)	!lituse_base!1
	ldq	$27, f($29)	!literal!5
	jsr	$26, ($27), f	!lituse_jsr!5
	ldah	$29, 0($26)	!gpdisp!3
	lda	$0, c($29)	!gprel
	ldah	$1, d($29)	!gprelhigh
	lda	$1, d($1)	!gprellow
	lda	$29, 0($29)	!gpdisp!3],,
    [AC_DEFINE(HAVE_AS_EXPLICIT_RELOCS, 1,
  [Define if your assembler supports explicit relocations.])])
    gcc_GAS_CHECK_FEATURE([jsrdirect relocation support],
	gcc_cv_as_alpha_jsrdirect_relocs, [2,16,90],,
[	.set nomacro
	.text
	ldq	$27, a($29)	!literal!1
	jsr	$26, ($27), a	!lituse_jsrdirect!1],,
    [AC_DEFINE(HAVE_AS_JSRDIRECT_RELOCS, 1,
  [Define if your assembler supports the lituse_jsrdirect relocation.])])
    ;;

  cris-*-*)
    gcc_GAS_CHECK_FEATURE([-no-mul-bug-abort option],
      gcc_cv_as_cris_no_mul_bug,[2,15,91],
      [-no-mul-bug-abort], [.text],,
      [AC_DEFINE(HAVE_AS_NO_MUL_BUG_ABORT_OPTION, 1,
		[Define if your assembler supports the -no-mul-bug-abort option.])])
    ;;

  sparc*-*-*)
    gcc_GAS_CHECK_FEATURE([.register], gcc_cv_as_sparc_register_op,,,
      [.register %g2, #scratch],,
      [AC_DEFINE(HAVE_AS_REGISTER_PSEUDO_OP, 1,
		[Define if your assembler supports .register.])])

    gcc_GAS_CHECK_FEATURE([@%:@nobits], gcc_cv_as_sparc_nobits,,,
      [.section "nobits",#alloc,#write,#nobits
       .section "progbits",#alloc,#write,#progbits])
    AC_DEFINE_UNQUOTED(HAVE_AS_SPARC_NOBITS,
      [`if test $gcc_cv_as_sparc_nobits = yes; then echo 1; else echo 0; fi`],
      [Define to 1 if your assembler supports #nobits, 0 otherwise.])

    gcc_GAS_CHECK_FEATURE([-relax option], gcc_cv_as_sparc_relax,,
      [-relax], [.text],,
      [AC_DEFINE(HAVE_AS_RELAX_OPTION, 1,
		[Define if your assembler supports -relax option.])])

    gcc_GAS_CHECK_FEATURE([GOTDATA_OP relocs],
      gcc_cv_as_sparc_gotdata_op,,
      [-K PIC],
[.text
.align 4
foo:
	nop
bar:
	sethi %gdop_hix22(foo), %g1
	xor    %g1, %gdop_lox10(foo), %g1
	ld    [[%l7 + %g1]], %g2, %gdop(foo)],
      [if test x$gcc_cv_ld != x \
       && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1; then
         if test x$gcc_cv_objdump != x; then
           if $gcc_cv_objdump -s -j .text conftest 2> /dev/null \
              | grep ' 03000004 82186004 c405c001'> /dev/null 2>&1; then
	       gcc_cv_as_sparc_gotdata_op=no
           else
	       gcc_cv_as_sparc_gotdata_op=yes
           fi
         fi
       fi
       rm -f conftest],
      [AC_DEFINE(HAVE_AS_SPARC_GOTDATA_OP, 1,
		[Define if your assembler and linker support GOTDATA_OP relocs.])])

    gcc_GAS_CHECK_FEATURE([unaligned pcrel relocs],
      gcc_cv_as_sparc_ua_pcrel,,
      [-K PIC],
[.text
foo:
	nop
.data
.align 4
.byte 0
.uaword %r_disp32(foo)],
      [if test x$gcc_cv_ld != x \
       && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1; then
	 gcc_cv_as_sparc_ua_pcrel=yes
       fi
       rm -f conftest],
      [AC_DEFINE(HAVE_AS_SPARC_UA_PCREL, 1,
		[Define if your assembler and linker support unaligned PC relative relocs.])

      gcc_GAS_CHECK_FEATURE([unaligned pcrel relocs against hidden symbols],
	gcc_cv_as_sparc_ua_pcrel_hidden,,
	[-K PIC],
[.data
.align 4
.byte 0x31
.uaword %r_disp32(foo)
.byte 0x32, 0x33, 0x34
.global foo
.hidden foo
foo:
.skip 4],
	[if test x$gcc_cv_ld != x && test x$gcc_cv_objdump != x \
	 && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1 \
	 && $gcc_cv_objdump -s -j .data conftest 2> /dev/null \
	    | grep ' 31000000 07323334' > /dev/null 2>&1; then
	    if $gcc_cv_objdump -R conftest 2> /dev/null \
	       | grep 'DISP32' > /dev/null 2>&1; then
		:
	    else
		gcc_cv_as_sparc_ua_pcrel_hidden=yes
	    fi
	 fi
	 rm -f conftest],
	 [AC_DEFINE(HAVE_AS_SPARC_UA_PCREL_HIDDEN, 1,
		   [Define if your assembler and linker support unaligned PC relative relocs against hidden symbols.])])
    ]) # unaligned pcrel relocs

    gcc_GAS_CHECK_FEATURE([offsetable %lo()],
      gcc_cv_as_sparc_offsetable_lo10,,
      [-xarch=v9],
[.text
	or %g1, %lo(ab) + 12, %g1
	or %g1, %lo(ab + 12), %g1],
      [if test x$gcc_cv_objdump != x \
       && $gcc_cv_objdump -s -j .text conftest.o 2> /dev/null \
          | grep ' 82106000 82106000' > /dev/null 2>&1; then
	 gcc_cv_as_sparc_offsetable_lo10=yes
       fi],
       [AC_DEFINE(HAVE_AS_OFFSETABLE_LO10, 1,
	         [Define if your assembler supports offsetable %lo().])])

    gcc_GAS_CHECK_FEATURE([FMAF, HPC, and VIS 3.0 instructions],
      gcc_cv_as_sparc_fmaf,,
      [-xarch=v9d],
      [.text
       .register %g2, #scratch
       .register %g3, #scratch
       .align 4
       fmaddd %f0, %f2, %f4, %f6
       addxccc %g1, %g2, %g3
       fsrl32 %f2, %f4, %f8
       fnaddd %f10, %f12, %f14],,
      [AC_DEFINE(HAVE_AS_FMAF_HPC_VIS3, 1,
                [Define if your assembler supports FMAF, HPC, and VIS 3.0 instructions.])])

    gcc_GAS_CHECK_FEATURE([SPARC4 instructions],
      gcc_cv_as_sparc_sparc4,,
      [-xarch=sparc4],
      [.text
       .register %g2, #scratch
       .register %g3, #scratch
       .align 4
       cxbe %g2, %g3, 1f
1:     cwbneg %g2, %g3, 1f
1:     sha1
       md5
       aes_kexpand0 %f4, %f6, %f8
       des_round %f38, %f40, %f42, %f44
       camellia_f %f54, %f56, %f58, %f60
       kasumi_fi_xor %f46, %f48, %f50, %f52],,
      [AC_DEFINE(HAVE_AS_SPARC4, 1,
                [Define if your assembler supports SPARC4 instructions.])])

    gcc_GAS_CHECK_FEATURE([LEON instructions],
      gcc_cv_as_sparc_leon,,
      [-Aleon],
      [.text
       .register %g2, #scratch
       .register %g3, #scratch
       .align 4
       smac %g2, %g3, %g1
       umac %g2, %g3, %g1
       casa [[%g2]] 0xb, %g3, %g1],,
      [AC_DEFINE(HAVE_AS_LEON, 1,
                [Define if your assembler supports LEON instructions.])])
    ;;

changequote(,)dnl
  i[34567]86-*-* | x86_64-*-*)
changequote([,])dnl
    case $target_os in
      cygwin*)
	# Full C++ conformance when using a shared libstdc++-v3 requires some
	# support from the Cygwin DLL, which in more recent versions exports
	# wrappers to aid in interposing and redirecting operators new, delete,
	# etc., as per n2800 #17.6.4.6 [replacement.functions].  Check if we
	# are configuring for a version of Cygwin that exports the wrappers.
	if test x$host = x$target && test x$host_cpu = xi686; then
	  AC_CHECK_FUNC([__wrap__Znaj],[gcc_ac_cygwin_dll_wrappers=yes],[gcc_ac_cygwin_dll_wrappers=no])
	else
	  # Can't check presence of libc functions during cross-compile, so
	  # we just have to assume we're building for an up-to-date target.
	  gcc_ac_cygwin_dll_wrappers=yes
	fi
	AC_DEFINE_UNQUOTED(USE_CYGWIN_LIBSTDCXX_WRAPPERS,
	  [`if test $gcc_ac_cygwin_dll_wrappers = yes; then echo 1; else echo 0; fi`],
	  [Define if you want to generate code by default that assumes that the
	   Cygwin DLL exports wrappers to support libstdc++ function replacement.])
    esac
    case $target_os in
      cygwin* | pe | mingw32* | interix*)
	# Recent binutils allows the three-operand form of ".comm" on PE.  This
	# definition is used unconditionally to initialise the default state of
	# the target option variable that governs usage of the feature.
	gcc_GAS_CHECK_FEATURE([.comm with alignment], gcc_cv_as_comm_has_align,
	 [2,19,52],,[.comm foo,1,32])
	AC_DEFINE_UNQUOTED(HAVE_GAS_ALIGNED_COMM,
	  [`if test $gcc_cv_as_comm_has_align = yes; then echo 1; else echo 0; fi`],
	  [Define if your assembler supports specifying the alignment
	   of objects allocated using the GAS .comm command.])
	# Used for DWARF 2 in PE
	gcc_GAS_CHECK_FEATURE([.secrel32 relocs],
	  gcc_cv_as_ix86_pe_secrel32,
	  [2,15,91],,
[.text
foo:	nop
.data
	.secrel32 foo],
	  [if test x$gcc_cv_ld != x \
	   && $gcc_cv_ld -o conftest conftest.o > /dev/null 2>&1; then
	     gcc_cv_as_ix86_pe_secrel32=yes
	   fi
	   rm -f conftest],
	  [AC_DEFINE(HAVE_GAS_PE_SECREL32_RELOC, 1,
	    [Define if your assembler and linker support 32-bit section relative relocs via '.secrel32 label'.])])
	# Test if the assembler supports the extended form of the .section
	# directive that specifies section alignment.  LTO support uses this,
	# but normally only after installation, so we warn but don't fail the
	# configure if LTO is enabled but the assembler does not support it.
	gcc_GAS_CHECK_FEATURE([.section with alignment], gcc_cv_as_section_has_align,
	  [2,20,1],-fatal-warnings,[.section lto_test,"dr0"])
	if test x$gcc_cv_as_section_has_align != xyes; then
	  case ",$enable_languages," in
	    *,lto,*)
	      AC_MSG_WARN([LTO for $target requires binutils >= 2.20.1, but version found appears insufficient; LTO will not work until binutils is upgraded.])
	      ;;
	  esac
	fi
	# Test if the assembler supports the section flag 'e' for specifying
	# an excluded section.
	gcc_GAS_CHECK_FEATURE([.section with e], gcc_cv_as_section_has_e,
	  [2,22,51],,
[.section foo1,"e"
.byte 0,0,0,0])
	AC_DEFINE_UNQUOTED(HAVE_GAS_SECTION_EXCLUDE,
	  [`if test $gcc_cv_as_section_has_e = yes; then echo 1; else echo 0; fi`],
          [Define if your assembler supports specifying the section flag e.])
	;;
    esac

    gcc_GAS_CHECK_FEATURE([filds and fists mnemonics],
       gcc_cv_as_ix86_filds,,,
       [filds mem; fists mem],,
       [AC_DEFINE(HAVE_AS_IX86_FILDS, 1,
         [Define if your assembler uses filds and fists mnemonics.])])

    gcc_GAS_CHECK_FEATURE([fildq and fistpq mnemonics],
       gcc_cv_as_ix86_fildq,,,
       [fildq mem; fistpq mem],,
       [AC_DEFINE(HAVE_AS_IX86_FILDQ, 1,
         [Define if your assembler uses fildq and fistq mnemonics.])])

    gcc_GAS_CHECK_FEATURE([cmov syntax],
      gcc_cv_as_ix86_cmov_sun_syntax,,,
      [cmovl.l %edx, %eax],,
      [AC_DEFINE(HAVE_AS_IX86_CMOV_SUN_SYNTAX, 1,
        [Define if your assembler supports the Sun syntax for cmov.])])

    gcc_GAS_CHECK_FEATURE([ffreep mnemonic],
      gcc_cv_as_ix86_ffreep,,,
      [ffreep %st(1)],,
      [AC_DEFINE(HAVE_AS_IX86_FFREEP, 1,
        [Define if your assembler supports the ffreep mnemonic.])])

    gcc_GAS_CHECK_FEATURE([.quad directive],
      gcc_cv_as_ix86_quad,,,
      [.quad 0],,
      [AC_DEFINE(HAVE_AS_IX86_QUAD, 1,
        [Define if your assembler supports the .quad directive.])])

    gcc_GAS_CHECK_FEATURE([sahf mnemonic],
      gcc_cv_as_ix86_sahf,,,
      [.code64
       sahf],,
      [AC_DEFINE(HAVE_AS_IX86_SAHF, 1,
        [Define if your assembler supports the sahf mnemonic in 64bit mode.])])

    gcc_GAS_CHECK_FEATURE([interunit movq mnemonic],
      gcc_cv_as_ix86_interunit_movq,,,
      [.code64
       movq %mm0, %rax
       movq %rax, %xmm0])
    AC_DEFINE_UNQUOTED(HAVE_AS_IX86_INTERUNIT_MOVQ,
      [`if test $gcc_cv_as_ix86_interunit_movq = yes; then echo 1; else echo 0; fi`],
      [Define if your assembler supports interunit movq mnemonic.])

    gcc_GAS_CHECK_FEATURE([hle prefixes],
      gcc_cv_as_ix86_hle,,,
      [lock xacquire cmpxchg %esi, (%ecx)],,
      [AC_DEFINE(HAVE_AS_IX86_HLE, 1,
        [Define if your assembler supports HLE prefixes.])])

    gcc_GAS_CHECK_FEATURE([swap suffix],
      gcc_cv_as_ix86_swap,,,
      [movl.s %esp, %ebp],,
      [AC_DEFINE(HAVE_AS_IX86_SWAP, 1,
        [Define if your assembler supports the swap suffix.])])

    gcc_GAS_CHECK_FEATURE([different section symbol subtraction],
      gcc_cv_as_ix86_diff_sect_delta,,,
      [.section .rodata
.L1:
        .long .L2-.L1
        .long .L3-.L1
        .text
.L3:    nop
.L2:    nop],,
      [AC_DEFINE(HAVE_AS_IX86_DIFF_SECT_DELTA, 1,
        [Define if your assembler supports the subtraction of symbols in different sections.])])

    # These two are used unconditionally by i386.[ch]; it is to be defined
    # to 1 if the feature is present, 0 otherwise.
    as_ix86_gotoff_in_data_opt=
    if test x$gas = xyes; then
      as_ix86_gotoff_in_data_opt="--32"
    fi
    gcc_GAS_CHECK_FEATURE([GOTOFF in data],
      gcc_cv_as_ix86_gotoff_in_data, [2,11,0],
      [$as_ix86_gotoff_in_data_opt],
[	.text
.L0:
	nop
	.data
	.long .L0@GOTOFF])
    AC_DEFINE_UNQUOTED(HAVE_AS_GOTOFF_IN_DATA,
      [`if test $gcc_cv_as_ix86_gotoff_in_data = yes; then echo 1; else echo 0; fi`],
      [Define true if the assembler supports '.long foo@GOTOFF'.])

    gcc_GAS_CHECK_FEATURE([rep and lock prefix],
        gcc_cv_as_ix86_rep_lock_prefix,,,
	[rep movsl
	 rep ret
	 rep nop
	 rep bsf %ecx, %eax
	 rep bsr %ecx, %eax
	 lock addl %edi, (%eax,%esi)
	 lock orl $0, (%esp)],,
        [AC_DEFINE(HAVE_AS_IX86_REP_LOCK_PREFIX, 1,
          [Define if the assembler supports 'rep <insn>, lock <insn>'.])])

    gcc_GAS_CHECK_FEATURE([ud2 mnemonic],
	gcc_cv_as_ix86_ud2,,,
	[ud2],,
      [AC_DEFINE(HAVE_AS_IX86_UD2, 1,
	[Define if your assembler supports the 'ud2' mnemonic.])])

    gcc_GAS_CHECK_FEATURE([R_386_TLS_GD_PLT reloc],
        gcc_cv_as_ix86_tlsgdplt,,,
	[call    tls_gd@tlsgdplt],
	[if test x$gcc_cv_ld != x \
	 && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1; then
	   gcc_cv_as_ix86_tlsgdplt=yes
	 fi
	 rm -f conftest],
      [AC_DEFINE(HAVE_AS_IX86_TLSGDPLT, 1,
        [Define if your assembler and linker support @tlsgdplt.])])

    conftest_s='
	.section .tdata,"aw'$tls_section_flag'",@progbits
tls_ld:
	.section .text,"ax",@progbits
	 call    tls_ld@tlsldmplt'
    gcc_GAS_CHECK_FEATURE([R_386_TLS_LDM_PLT reloc],
        gcc_cv_as_ix86_tlsldmplt,,,
	[$conftest_s],
	[if test x$gcc_cv_ld != x \
	 && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1; then
	   gcc_cv_as_ix86_tlsldmplt=yes
	 fi
	 rm -f conftest])
    AC_DEFINE_UNQUOTED(HAVE_AS_IX86_TLSLDMPLT,
      [`if test $gcc_cv_as_ix86_tlsldmplt = yes; then echo 1; else echo 0; fi`],
      [Define to 1 if your assembler and linker support @tlsldmplt.])

    # Enforce 32-bit output with gas and gld.
    if test x$gas = xyes; then
      as_ix86_tls_ldm_opt="--32"
    fi
    if echo "$ld_ver" | grep GNU > /dev/null; then
      if $gcc_cv_ld -V 2>/dev/null | grep elf_i386_sol2 > /dev/null; then
        ld_ix86_tls_ldm_opt="-melf_i386_sol2"
      else
        ld_ix86_tls_ldm_opt="-melf_i386"
      fi
    fi
    conftest_s='
	.section .text,"ax",@progbits
        .globl  _start
        .type   _start, @function
_start:      
	leal	value@tlsldm(%ebx), %eax
	call	___tls_get_addr@plt

        .section .tdata,"aw'$tls_section_flag'",@progbits
        .type	value, @object
value:'
    gcc_GAS_CHECK_FEATURE([R_386_TLS_LDM reloc],
        gcc_cv_as_ix86_tlsldm,,
	[$as_ix86_tls_ldm_opt],
	[$conftest_s],
	[if test x$gcc_cv_ld != x && test x$gcc_cv_objdump != x \
	    && $gcc_cv_ld $ld_ix86_tls_ldm_opt -o conftest conftest.o $ld_tls_libs -lc > /dev/null 2>&1; then
	   if $gcc_cv_objdump -d conftest 2>/dev/null | grep nop > /dev/null \
	      || dis conftest 2>/dev/null | grep nop > /dev/null; then
	     gcc_cv_as_ix86_tlsldm=yes
	   fi
	 fi
	 rm -f conftest])
    AC_DEFINE_UNQUOTED(HAVE_AS_IX86_TLSLDM,
      [`if test $gcc_cv_as_ix86_tlsldm = yes; then echo 1; else echo 0; fi`],
      [Define to 1 if your assembler and linker support @tlsldm.])

    ;;

  ia64*-*-*)
    gcc_GAS_CHECK_FEATURE([ltoffx and ldxmov relocs],
	gcc_cv_as_ia64_ltoffx_ldxmov_relocs, [2,14,0],,
[	.text
	addl r15 = @ltoffx(x#), gp
	;;
	ld8.mov r16 = [[r15]], x#],,
    [AC_DEFINE(HAVE_AS_LTOFFX_LDXMOV_RELOCS, 1,
	  [Define if your assembler supports ltoffx and ldxmov relocations.])])

    ;;

  powerpc*-*-*)
    case $target in
      *-*-aix*) conftest_s='	.machine "pwr5"
	.csect .text[[PR]]
	mfcr 3,128';;
      *-*-darwin*)
	gcc_GAS_CHECK_FEATURE([.machine directive support],
	  gcc_cv_as_machine_directive,,,
	  [	.machine ppc7400])
	if test x$gcc_cv_as_machine_directive != xyes; then
	  echo "*** This target requires an assembler supporting \".machine\"" >&2
	  echo you can get it from: ftp://gcc.gnu.org/pub/gcc/infrastructure/cctools-528.5.dmg >&2
	  test x$build = x$target && exit 1
	fi
	conftest_s='	.text
	mfcr r3,128';;
      *) conftest_s='	.machine power4
	.text
	mfcr 3,128';;
    esac

    gcc_GAS_CHECK_FEATURE([mfcr field support],
      gcc_cv_as_powerpc_mfcrf, [2,14,0],,
      [$conftest_s],,
      [AC_DEFINE(HAVE_AS_MFCRF, 1,
	  [Define if your assembler supports mfcr field.])])

    case $target in
      *-*-aix*) conftest_s='	.machine "pwr5"
	.csect .text[[PR]]
	popcntb 3,3';;
      *) conftest_s='	.machine power5
	.text
	popcntb 3,3';;
    esac

    gcc_GAS_CHECK_FEATURE([popcntb support],
      gcc_cv_as_powerpc_popcntb, [2,17,0],,
      [$conftest_s],,
      [AC_DEFINE(HAVE_AS_POPCNTB, 1,
	  [Define if your assembler supports popcntb field.])])

    case $target in
      *-*-aix*) conftest_s='	.machine "pwr5x"
	.csect .text[[PR]]
	frin 1,1';;
      *) conftest_s='	.machine power5
	.text
	frin 1,1';;
    esac

    gcc_GAS_CHECK_FEATURE([fp round support],
      gcc_cv_as_powerpc_fprnd, [2,17,0],,
      [$conftest_s],,
      [AC_DEFINE(HAVE_AS_FPRND, 1,
	  [Define if your assembler supports fprnd.])])

    case $target in
      *-*-aix*) conftest_s='	.machine "pwr6"
	.csect .text[[PR]]
	mffgpr 1,3';;
      *) conftest_s='	.machine power6
	.text
	mffgpr 1,3';;
    esac

    gcc_GAS_CHECK_FEATURE([move fp gpr support],
      gcc_cv_as_powerpc_mfpgpr, [2,19,2],,
      [$conftest_s],,
      [AC_DEFINE(HAVE_AS_MFPGPR, 1,
	  [Define if your assembler supports mffgpr and mftgpr.])])

    case $target in
      *-*-aix*) conftest_s='	.csect .text[[PR]]
LCF..0:
	addis 11,30,_GLOBAL_OFFSET_TABLE_-LCF..0@ha';;
      *-*-darwin*)
	conftest_s='	.text
LCF0:
	addis r11,r30,_GLOBAL_OFFSET_TABLE_-LCF0@ha';;
      *) conftest_s='	.text
.LCF0:
	addis 11,30,_GLOBAL_OFFSET_TABLE_-.LCF0@ha';;
    esac

    gcc_GAS_CHECK_FEATURE([rel16 relocs],
      gcc_cv_as_powerpc_rel16, [2,17,0], -a32,
      [$conftest_s],,
      [AC_DEFINE(HAVE_AS_REL16, 1,
	  [Define if your assembler supports R_PPC_REL16 relocs.])])

    case $target in
      *-*-aix*) conftest_s='	.machine "pwr6"
	.csect .text[[PR]]
	cmpb 3,4,5';;
      *) conftest_s='	.machine power6
	.text
	cmpb 3,4,5';;
    esac

    gcc_GAS_CHECK_FEATURE([compare bytes support],
      gcc_cv_as_powerpc_cmpb, [2,19,2], -a32,
      [$conftest_s],,
      [AC_DEFINE(HAVE_AS_CMPB, 1,
	  [Define if your assembler supports cmpb.])])

    case $target in
      *-*-aix*) conftest_s='	.machine "pwr6"
	.csect .text[[PR]]
	dadd 1,2,3';;
      *) conftest_s='	.machine power6
	.text
	dadd 1,2,3';;
    esac

    gcc_GAS_CHECK_FEATURE([decimal float support],
      gcc_cv_as_powerpc_dfp, [2,19,2], -a32,
      [$conftest_s],,
      [AC_DEFINE(HAVE_AS_DFP, 1,
	  [Define if your assembler supports DFP instructions.])])

    case $target in
      *-*-aix*) conftest_s='	.machine "pwr7"
	.csect .text[[PR]]
	lxvd2x 1,2,3';;
      *) conftest_s='	.machine power7
	.text
	lxvd2x 1,2,3';;
    esac

    gcc_GAS_CHECK_FEATURE([vector-scalar support],
      gcc_cv_as_powerpc_vsx, [2,19,2], -a32,
      [$conftest_s],,
      [AC_DEFINE(HAVE_AS_VSX, 1,
	  [Define if your assembler supports VSX instructions.])])

    case $target in
      *-*-aix*) conftest_s='	.machine "pwr7"
	.csect .text[[PR]]
	popcntd 3,3';;
      *) conftest_s='	.machine power7
	.text
	popcntd 3,3';;
    esac

    gcc_GAS_CHECK_FEATURE([popcntd support],
      gcc_cv_as_powerpc_popcntd, [2,19,2], -a32,
      [$conftest_s],,
      [AC_DEFINE(HAVE_AS_POPCNTD, 1,
	  [Define if your assembler supports POPCNTD instructions.])])

    case $target in
      *-*-aix*) conftest_s='	.machine "pwr8"
	.csect .text[[PR]]';;
      *) conftest_s='	.machine power8
	.text';;
    esac

    gcc_GAS_CHECK_FEATURE([power8 support],
      gcc_cv_as_powerpc_power8, [2,19,2], -a32,
      [$conftest_s],,
      [AC_DEFINE(HAVE_AS_POWER8, 1,
	  [Define if your assembler supports POWER8 instructions.])])

    case $target in
      *-*-aix*) conftest_s='	.csect .text[[PR]]
	lwsync';;
      *) conftest_s='	.text
	lwsync';;
    esac

    gcc_GAS_CHECK_FEATURE([lwsync support],
      gcc_cv_as_powerpc_lwsync, [2,19,2], -a32,
      [$conftest_s],,
      [AC_DEFINE(HAVE_AS_LWSYNC, 1,
	  [Define if your assembler supports LWSYNC instructions.])])

    case $target in
      *-*-aix*) conftest_s='	.machine "476"
	.csect .text[[PR]]
	dci 0';;
      *) conftest_s='	.machine "476"
	.text
	dci 0';;
    esac

    gcc_GAS_CHECK_FEATURE([data cache invalidate support],
      gcc_cv_as_powerpc_dci, [9,99,0], -a32,
      [$conftest_s],,
      [AC_DEFINE(HAVE_AS_DCI, 1,
	  [Define if your assembler supports the DCI/ICI instructions.])])

    gcc_GAS_CHECK_FEATURE([.gnu_attribute support],
      gcc_cv_as_powerpc_gnu_attribute, [2,18,0],,
      [.gnu_attribute 4,1],,
      [AC_DEFINE(HAVE_AS_GNU_ATTRIBUTE, 1,
	  [Define if your assembler supports .gnu_attribute.])])

    gcc_GAS_CHECK_FEATURE([tls marker support],
      gcc_cv_as_powerpc_tls_markers, [2,20,0],,
      [ bl __tls_get_addr(x@tlsgd)],,
      [AC_DEFINE(HAVE_AS_TLS_MARKERS, 1,
	  [Define if your assembler supports arg info for __tls_get_addr.])])

    case $target in
      *-*-aix*)
	gcc_GAS_CHECK_FEATURE([.ref support],
	  gcc_cv_as_aix_ref, [2,21,0],,
	  [	.csect stuff[[rw]]
	     stuff:
		.long 1
		.extern sym
		.ref sym
	  ],,
	  [AC_DEFINE(HAVE_AS_REF, 1,
	    [Define if your assembler supports .ref])])
	;;
    esac
    ;;

  mips*-*-*)
    gcc_GAS_CHECK_FEATURE([explicit relocation support],
      gcc_cv_as_mips_explicit_relocs, [2,14,0],,
[	lw $4,%gp_rel(foo)($4)],,
      [if test x$target_cpu_default = x
       then target_cpu_default=MASK_EXPLICIT_RELOCS
       else target_cpu_default="($target_cpu_default)|MASK_EXPLICIT_RELOCS"
       fi])
    gcc_GAS_CHECK_FEATURE([-mno-shared support],
      gcc_cv_as_mips_no_shared, [2,16,0], [-mno-shared], [nop],,
      [AC_DEFINE(HAVE_AS_NO_SHARED, 1,
		 [Define if the assembler understands -mno-shared.])])

    gcc_GAS_CHECK_FEATURE([.gnu_attribute support],
      gcc_cv_as_mips_gnu_attribute, [2,18,0],,
      [.gnu_attribute 4,1],,
      [AC_DEFINE(HAVE_AS_GNU_ATTRIBUTE, 1,
	  [Define if your assembler supports .gnu_attribute.])])

    gcc_GAS_CHECK_FEATURE([.module support],
      gcc_cv_as_mips_dot_module,,,
      [.module fp=32],,
      [AC_DEFINE(HAVE_AS_DOT_MODULE, 1,
	  [Define if your assembler supports .module.])])
    if test x$gcc_cv_as_mips_dot_module = xno \
       && test x$with_fp_32 != x; then
      AC_MSG_ERROR(
	[Requesting --with-fp-32= requires assembler support for .module.])
    fi

    gcc_GAS_CHECK_FEATURE([.micromips support],
      gcc_cv_as_micromips_support,,[--fatal-warnings],
      [.set micromips],,
      [AC_DEFINE(HAVE_GAS_MICROMIPS, 1,
          [Define if your assembler supports the .set micromips directive])])

    gcc_GAS_CHECK_FEATURE([.dtprelword support],
      gcc_cv_as_mips_dtprelword, [2,18,0],,
      [.section .tdata,"awT",@progbits
x:
	.word 2
	.text
	.dtprelword x+0x8000],,
      [AC_DEFINE(HAVE_AS_DTPRELWORD, 1,
	  [Define if your assembler supports .dtprelword.])])

    gcc_GAS_CHECK_FEATURE([DSPR1 mult with four accumulators support],
      gcc_cv_as_mips_dspr1_mult,,,
[	.set	mips32r2
	.set	nodspr2
	.set	dsp
	madd	$ac3,$4,$5
	maddu	$ac3,$4,$5
	msub	$ac3,$4,$5
	msubu	$ac3,$4,$5
	mult	$ac3,$4,$5
	multu	$ac3,$4,$5],,
      [AC_DEFINE(HAVE_AS_DSPR1_MULT, 1,
	  [Define if your assembler supports DSPR1 mult.])])

    AC_MSG_CHECKING(assembler and linker for explicit JALR relocation)
    gcc_cv_as_ld_jalr_reloc=no
    if test $gcc_cv_as_mips_explicit_relocs = yes; then
      if test $in_tree_ld = yes ; then
        if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 20 -o "$gcc_cv_gld_major_version" -gt 2 \
           && test $in_tree_ld_is_elf = yes; then
          gcc_cv_as_ld_jalr_reloc=yes
        fi
      elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x; then
        echo '	.ent x' > conftest.s
        echo 'x:	ld $2,%got_disp(y)($3)' >> conftest.s
        echo '	ld $25,%call16(y)($28)' >> conftest.s
        echo '	.reloc	1f,R_MIPS_JALR,y' >> conftest.s
        echo '1:	jalr $25' >> conftest.s
        echo '	.reloc	1f,R_MIPS_JALR,x' >> conftest.s
        echo '1:	jalr $25' >> conftest.s
        echo '	.end x' >> conftest.s
        if $gcc_cv_as -o conftest.o conftest.s >/dev/null 2>&AS_MESSAGE_LOG_FD \
           && $gcc_cv_ld -shared -o conftest.so conftest.o >/dev/null 2>&AS_MESSAGE_LOG_FD; then
	  if $gcc_cv_objdump -d conftest.so | grep jalr >/dev/null 2>&1 \
	     && $gcc_cv_objdump -d conftest.so | grep "bal.*<x>" >/dev/null 2>&1; then
            gcc_cv_as_ld_jalr_reloc=yes
	  fi
        fi
        rm -f conftest.*
      fi
    fi
    if test $gcc_cv_as_ld_jalr_reloc = yes; then
      if test x$target_cpu_default = x; then
        target_cpu_default=MASK_RELAX_PIC_CALLS
      else
        target_cpu_default="($target_cpu_default)|MASK_RELAX_PIC_CALLS"
      fi
    fi
    AC_MSG_RESULT($gcc_cv_as_ld_jalr_reloc)

    AC_CACHE_CHECK([linker for .eh_frame personality relaxation],
      [gcc_cv_ld_mips_personality_relaxation],
      [gcc_cv_ld_mips_personality_relaxation=no
       if test $in_tree_ld = yes ; then
	 if test "$gcc_cv_gld_major_version" -eq 2 \
		 -a "$gcc_cv_gld_minor_version" -ge 21 \
		 -o "$gcc_cv_gld_major_version" -gt 2; then
	   gcc_cv_ld_mips_personality_relaxation=yes
	 fi
       elif test x$gcc_cv_as != x \
       	    	 -a x$gcc_cv_ld != x \
		 -a x$gcc_cv_readelf != x ; then
	 cat > conftest.s <<EOF
	.cfi_startproc
	.cfi_personality 0x80,indirect_ptr
	.ent test
test:
	nop
	.end test
	.cfi_endproc

	.section .data,"aw",@progbits
indirect_ptr:
	.dc.a personality
EOF
	 if $gcc_cv_as -KPIC -o conftest.o conftest.s > /dev/null 2>&1 \
	    && $gcc_cv_ld -o conftest conftest.o -shared > /dev/null 2>&1; then
	   if $gcc_cv_readelf -d conftest 2>&1 \
	      | grep TEXTREL > /dev/null 2>&1; then
	     :
	   elif $gcc_cv_readelf --relocs conftest 2>&1 \
	        | grep 'R_MIPS_REL32 *$' > /dev/null 2>&1; then
	     :
	   else
	     gcc_cv_ld_mips_personality_relaxation=yes
	   fi
	 fi
       fi
       rm -f conftest.s conftest.o conftest])
    if test x$gcc_cv_ld_mips_personality_relaxation = xyes; then
	    AC_DEFINE(HAVE_LD_PERSONALITY_RELAXATION, 1,
      [Define if your linker can relax absolute .eh_frame personality
pointers into PC-relative form.])
    fi

    gcc_GAS_CHECK_FEATURE([-mnan= support],
      gcc_cv_as_mips_nan,,
      [-mnan=2008],,,
      [AC_DEFINE(HAVE_AS_NAN, 1,
		 [Define if the assembler understands -mnan=.])])
    if test x$gcc_cv_as_mips_nan = xno \
       && test x$with_nan != x; then
      AC_MSG_ERROR(
	[Requesting --with-nan= requires assembler support for -mnan=])
    fi
    ;;
esac

# Mips and HP-UX need the GNU assembler.
# Linux on IA64 might be able to use the Intel assembler.

case "$target" in
  mips*-*-* | *-*-hpux* )
    if test x$gas_flag = xyes \
       || test x"$host" != x"$build" \
       || test ! -x "$gcc_cv_as" \
       || "$gcc_cv_as" -v < /dev/null 2>&1 | grep GNU > /dev/null; then
      :
    else
      echo "*** This configuration requires the GNU assembler" >&2
      exit 1
    fi
    ;;
esac

# ??? Not all targets support dwarf2 debug_line, even within a version
# of gas.  Moreover, we need to emit a valid instruction to trigger any
# info to the output file.  So, as supported targets are added to gas 2.11,
# add some instruction here to (also) show we expect this might work.
# ??? Once 2.11 is released, probably need to add first known working
# version to the per-target configury.
case "$cpu_type" in
  aarch64 | alpha | arm | avr | bfin | cris | i386 | m32c | m68k | microblaze \
  | mips | nios2 | pa | rs6000 | score | sparc | spu | tilegx | tilepro \
  | xstormy16 | xtensa)
    insn="nop"
    ;;
  ia64 | s390)
    insn="nop 0"
    ;;
  mmix)
    insn="swym 0"
    ;;
esac
if test x"$insn" != x; then
 conftest_s="\
	.file 1 \"conftest.s\"
	.loc 1 3 0
	$insn"
 gcc_GAS_CHECK_FEATURE([dwarf2 debug_line support],
  gcc_cv_as_dwarf2_debug_line,
  [elf,2,11,0],, [$conftest_s],
  [if test x$gcc_cv_objdump != x \
   && $gcc_cv_objdump -h conftest.o 2> /dev/null \
      | grep debug_line > /dev/null 2>&1; then
     gcc_cv_as_dwarf2_debug_line=yes
   fi])

# The .debug_line file table must be in the exact order that
# we specified the files, since these indices are also used
# by DW_AT_decl_file.  Approximate this test by testing if
# the assembler bitches if the same index is assigned twice.
 gcc_GAS_CHECK_FEATURE([buggy dwarf2 .file directive],
  gcc_cv_as_dwarf2_file_buggy,,,
[	.file 1 "foo.s"
	.file 1 "bar.s"])

 if test $gcc_cv_as_dwarf2_debug_line = yes \
 && test $gcc_cv_as_dwarf2_file_buggy = no; then
	AC_DEFINE(HAVE_AS_DWARF2_DEBUG_LINE, 1,
  [Define if your assembler supports dwarf2 .file/.loc directives,
   and preserves file table indices exactly as given.])
 fi

 gcc_GAS_CHECK_FEATURE([--gdwarf2 option],
  gcc_cv_as_gdwarf2_flag,
  [elf,2,11,0], [--gdwarf2], [$insn],,
  [AC_DEFINE(HAVE_AS_GDWARF2_DEBUG_FLAG, 1,
[Define if your assembler supports the --gdwarf2 option.])])

 gcc_GAS_CHECK_FEATURE([--gstabs option],
  gcc_cv_as_gstabs_flag,
  [elf,2,11,0], [--gstabs], [$insn],
  [# The native Solaris 9/Intel assembler doesn't understand --gstabs
   # and warns about it, but still exits successfully.  So check for
   # this.
   if AC_TRY_COMMAND([$gcc_cv_as --gstabs -o conftest.o conftest.s 2>&1 | grep -i warning > /dev/null])
   then :
   else gcc_cv_as_gstabs_flag=yes
   fi],
  [AC_DEFINE(HAVE_AS_GSTABS_DEBUG_FLAG, 1,
[Define if your assembler supports the --gstabs option.])])

 gcc_GAS_CHECK_FEATURE([--debug-prefix-map option],
  gcc_cv_as_debug_prefix_map_flag,
  [2,18,0], [--debug-prefix-map /a=/b], [$insn],,
  [AC_DEFINE(HAVE_AS_DEBUG_PREFIX_MAP, 1,
[Define if your assembler supports the --debug-prefix-map option.])])
fi

gcc_GAS_CHECK_FEATURE([.lcomm with alignment], gcc_cv_as_lcomm_with_alignment,
 ,,
[.lcomm bar,4,16],,
[AC_DEFINE(HAVE_GAS_LCOMM_WITH_ALIGNMENT, 1,
  [Define if your assembler supports .lcomm with an alignment field.])])

if test x$with_sysroot = x && test x$host = x$target \
   && test "$prefix" != "/usr" && test "x$prefix" != "x$local_prefix" \
   && test "$prefix" != "NONE"; then
  AC_DEFINE_UNQUOTED(PREFIX_INCLUDE_DIR, "$prefix/include",
[Define to PREFIX/include if cpp should also search that directory.])
fi

if test x$host != x$target || test "x$TARGET_SYSTEM_ROOT" != x; then
  if test "x$with_headers" != x; then
    target_header_dir=$with_headers
  elif test "x$with_sysroot" = x; then
    target_header_dir="${test_exec_prefix}/${target_noncanonical}/sys-include"
  elif test "x$with_build_sysroot" != "x"; then
    target_header_dir="${with_build_sysroot}${native_system_header_dir}"
  elif test "x$with_sysroot" = xyes; then
    target_header_dir="${test_exec_prefix}/${target_noncanonical}/sys-root${native_system_header_dir}"
  else
    target_header_dir="${with_sysroot}${native_system_header_dir}"
  fi
else
  target_header_dir=${native_system_header_dir}
fi

# Determine the version of glibc, if any, used on the target.
AC_MSG_CHECKING([for target glibc version])
AC_ARG_WITH([glibc-version],
  [AS_HELP_STRING([--with-glibc-version=M.N],
    [assume GCC used with glibc version M.N or later])], [
if [echo "$with_glibc_version" | grep '^[0-9][0-9]*\.[0-9][0-9]*$']; then
  glibc_version_major=`echo "$with_glibc_version" | sed -e 's/\..*//'`
  glibc_version_minor=`echo "$with_glibc_version" | sed -e 's/.*\.//'`
else
  AC_MSG_ERROR([option --with-glibc-version requires a version number M.N])
fi], [
glibc_version_major=0
glibc_version_minor=0
[if test -f $target_header_dir/features.h \
  && glibc_version_major_define=`$EGREP '^[ 	]*#[ 	]*define[ 	]+__GLIBC__[ 	]+[0-9]' $target_header_dir/features.h` \
  && glibc_version_minor_define=`$EGREP '^[ 	]*#[ 	]*define[ 	]+__GLIBC_MINOR__[ 	]+[0-9]' $target_header_dir/features.h`; then
  glibc_version_major=`echo "$glibc_version_major_define" | sed -e 's/.*__GLIBC__[ 	]*//'`
  glibc_version_minor=`echo "$glibc_version_minor_define" | sed -e 's/.*__GLIBC_MINOR__[ 	]*//'`
fi]])
AC_MSG_RESULT([$glibc_version_major.$glibc_version_minor])

AC_ARG_ENABLE(gnu-unique-object,
 [AS_HELP_STRING([--enable-gnu-unique-object],
   [enable the use of the @gnu_unique_object ELF extension on glibc systems])],
 [case $enable_gnu_unique_object in
    yes | no) ;;
    *) AC_MSG_ERROR(['$enable_gnu_unique_object' is an invalid value for --enable-gnu-unique-object.
Valid choices are 'yes' and 'no'.]) ;;
  esac],
 [gcc_GAS_CHECK_FEATURE([gnu_unique_object], gcc_cv_as_gnu_unique_object,
   [elf,2,19,52],,
   [.type foo, '$target_type_format_char'gnu_unique_object],,
# We need to unquote above to to use the definition from config.gcc.
# Also check for ld.so support, i.e. glibc 2.11 or higher.
   [GCC_GLIBC_VERSION_GTE_IFELSE([2], [11], [enable_gnu_unique_object=yes], )]
   )])
if test x$enable_gnu_unique_object = xyes; then
  AC_DEFINE(HAVE_GAS_GNU_UNIQUE_OBJECT, 1,
   [Define if your assembler supports @gnu_unique_object.])
fi

AC_CACHE_CHECK([assembler for tolerance to line number 0],
 [gcc_cv_as_line_zero],
 [gcc_cv_as_line_zero=no
  if test $in_tree_gas = yes; then
    gcc_GAS_VERSION_GTE_IFELSE(2, 16, 91, [gcc_cv_as_line_zero=yes])
  elif test "x$gcc_cv_as" != x; then
    { echo '# 1 "test.s" 1'; echo '# 0 "" 2'; } > conftest.s
    if AC_TRY_COMMAND([$gcc_cv_as -o conftest.o conftest.s >&AS_MESSAGE_LOG_FD 2>conftest.out]) &&
       test "x`cat conftest.out`" = x
    then
      gcc_cv_as_line_zero=yes
    else
      echo "configure: failed program was" >&AS_MESSAGE_LOG_FD
      cat conftest.s >&AS_MESSAGE_LOG_FD
      echo "configure: error output was" >&AS_MESSAGE_LOG_FD
      cat conftest.out >&AS_MESSAGE_LOG_FD
    fi
    rm -f conftest.o conftest.s conftest.out
  fi])
if test "x$gcc_cv_as_line_zero" = xyes; then
  AC_DEFINE([HAVE_AS_LINE_ZERO], 1,
[Define if the assembler won't complain about a line such as # 0 "" 2.])
fi

AC_MSG_CHECKING(linker PT_GNU_EH_FRAME support)
gcc_cv_ld_eh_frame_hdr=no
if test $in_tree_ld = yes ; then
  if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 12 -o "$gcc_cv_gld_major_version" -gt 2 \
     && test $in_tree_ld_is_elf = yes; then
    gcc_cv_ld_eh_frame_hdr=yes
  fi
elif test x$gcc_cv_ld != x; then
  if echo "$ld_ver" | grep GNU > /dev/null; then
    # Check if linker supports --eh-frame-hdr option
    if $gcc_cv_ld --help 2>/dev/null | grep eh-frame-hdr > /dev/null; then
      gcc_cv_ld_eh_frame_hdr=yes
    fi
  else
    case "$target" in
      *-*-solaris2*)
        # Sun ld has various bugs in .eh_frame_hdr support before version 1.2251.
        if test "$ld_vers_major" -gt 1 || test "$ld_vers_minor" -ge 2251; then
          gcc_cv_ld_eh_frame_hdr=yes
        fi
        ;;
    esac
  fi
fi
GCC_TARGET_TEMPLATE([HAVE_LD_EH_FRAME_HDR])
if test x"$gcc_cv_ld_eh_frame_hdr" = xyes; then
	AC_DEFINE(HAVE_LD_EH_FRAME_HDR, 1,
[Define if your linker supports .eh_frame_hdr.])
  AC_ARG_ENABLE(eh-frame-hdr-for-static,
   [AS_HELP_STRING([--enable-eh-frame-hdr-for-static],
     [enable linker PT_GNU_EH_FRAME support for static executable])],
   [case $enable_eh_frame_hdr_for_static in
    yes | no) ;;
    *) AC_MSG_ERROR(['$enable_eh_frame_hdr_for_static' is an invalid
value for --enable-eh-frame-hdr-for-static.
Valid choices are 'yes' and 'no'.]) ;;
    esac])
## Only support for glibc 2.3.0 or higher with AT_PHDR/AT_PHNUM from
## Linux kernel.
#   [[if test x$host = x$build -a x$host = x$target &&
#       ldd --version 2>&1 >/dev/null &&
#       glibcver=`ldd --version 2>/dev/null | sed 's/.* //;q'`; then
#      glibcmajor=`expr "$glibcver" : "\([0-9]*\)"`
#      glibcminor=`expr "$glibcver" : "[2-9]*\.\([0-9]*\)"`
#      glibcnum=`expr $glibcmajor \* 1000 + $glibcminor`
#      if test "$glibcnum" -ge 2003 ; then
#	auvx=`LD_SHOW_AUXV=1 ldd 2>/dev/null`
#	if echo "$auvx" | grep AT_PHDR > /dev/null &&
#	   echo "$auvx" | grep AT_PHNUM > /dev/null; then
#	  enable_eh_frame_hdr_for_static=yes
#	fi
#      fi
#    fi]])

  if test x$enable_eh_frame_hdr_for_static = xyes; then
    AC_DEFINE(USE_EH_FRAME_HDR_FOR_STATIC, 1,
[Define if your system supports PT_GNU_EH_FRAME for static executable.])
  fi
fi
AC_MSG_RESULT($gcc_cv_ld_eh_frame_hdr)

AC_MSG_CHECKING(linker CIEv3 in .eh_frame support)
gcc_cv_ld_eh_frame_ciev3=no
if test $in_tree_ld = yes ; then
  if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 \
     && test $in_tree_ld_is_elf = yes; then
    gcc_cv_ld_eh_frame_ciev3=yes
  fi
elif test x$gcc_cv_ld != x; then
  if echo "$ld_ver" | grep GNU > /dev/null; then
    gcc_cv_ld_eh_frame_ciev3=yes
    if test 0"$ld_date" -lt 20040513; then
      if test -n "$ld_date"; then
	# If there was date string, but was earlier than 2004-05-13, fail
	gcc_cv_ld_eh_frame_ciev3=no
      elif test "$ld_vers_major" -lt 2; then
	gcc_cv_ld_eh_frame_ciev3=no
      elif test "$ld_vers_major" -eq 2 -a "$ld_vers_minor" -lt 16; then
	gcc_cv_ld_eh_frame_ciev3=no
      fi
    fi
  else
    case "$target" in
      *-*-solaris2*)
        # Sun ld added support for CIE v3 in .eh_frame in Solaris 11.1.
        if test "$ld_vers_major" -gt 1 || test "$ld_vers_minor" -ge 2324; then
          gcc_cv_ld_eh_frame_ciev3=yes
        fi
        ;;
    esac
  fi
fi
AC_DEFINE_UNQUOTED(HAVE_LD_EH_FRAME_CIEV3,
  [`if test x"$gcc_cv_ld_eh_frame_ciev3" = xyes; then echo 1; else echo 0; fi`],
  [Define 0/1 if your linker supports CIE v3 in .eh_frame.])
AC_MSG_RESULT($gcc_cv_ld_eh_frame_ciev3)

AC_MSG_CHECKING(linker position independent executable support)
gcc_cv_ld_pie=no
if test $in_tree_ld = yes ; then
  if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 15 -o "$gcc_cv_gld_major_version" -gt 2 \
     && test $in_tree_ld_is_elf = yes; then
    gcc_cv_ld_pie=yes
  fi
elif test x$gcc_cv_ld != x; then
	# Check if linker supports -pie option
	if $gcc_cv_ld --help 2>/dev/null | grep -- -pie > /dev/null; then
		gcc_cv_ld_pie=yes
	fi
fi
if test x"$gcc_cv_ld_pie" = xyes; then
	AC_DEFINE(HAVE_LD_PIE, 1,
[Define if your linker supports -pie option.])
fi
AC_MSG_RESULT($gcc_cv_ld_pie)

AC_MSG_CHECKING(linker PIE support with copy reloc)
gcc_cv_ld_pie_copyreloc=no
if test $gcc_cv_ld_pie = yes ; then
  if test $in_tree_ld = yes ; then
    if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 25 -o "$gcc_cv_gld_major_version" -gt 2; then
      gcc_cv_ld_pie_copyreloc=yes
    fi
  elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x ; then
    # Check if linker supports -pie option with copy reloc
    case "$target" in
    i?86-*-linux* | x86_64-*-linux*)
      cat > conftest1.s <<EOF
	.globl	a_glob
	.data
	.type	a_glob, @object
	.size	a_glob, 4
a_glob:
	.long	2
EOF
      cat > conftest2.s <<EOF
	.text
	.globl	main
	.type	main, @function
main:
	movl	%eax, a_glob(%rip)
	.size	main, .-main
EOF
      if $gcc_cv_as --64 -o conftest1.o conftest1.s > /dev/null 2>&1 \
         && $gcc_cv_ld -shared -melf_x86_64 -o conftest1.so conftest1.o > /dev/null 2>&1 \
         && $gcc_cv_as --64 -o conftest2.o conftest2.s > /dev/null 2>&1 \
         && $gcc_cv_ld -pie -melf_x86_64 -o conftest conftest2.o conftest1.so > /dev/null 2>&1; then
        gcc_cv_ld_pie_copyreloc=yes
      fi
      rm -f conftest conftest1.so conftest1.o conftest2.o conftest1.s conftest2.s
      ;;
    esac
  fi
fi
AC_DEFINE_UNQUOTED(HAVE_LD_PIE_COPYRELOC,
  [`if test x"$gcc_cv_ld_pie_copyreloc" = xyes; then echo 1; else echo 0; fi`],
  [Define 0/1 if your linker supports -pie option with copy reloc.])
AC_MSG_RESULT($gcc_cv_ld_pie_copyreloc)

AC_MSG_CHECKING(linker EH-compatible garbage collection of sections)
gcc_cv_ld_eh_gc_sections=no
if test $in_tree_ld = yes ; then
  if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 17 -o "$gcc_cv_gld_major_version" -gt 2 \
     && test $in_tree_ld_is_elf = yes; then
    gcc_cv_ld_eh_gc_sections=yes
  fi
elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x ; then
  cat > conftest.s <<EOF
	.section	.text
.globl _start
        .type _start, @function
_start:
	.long foo
	.size _start, .-_start
	.section	.text.foo,"ax",@progbits
	.type foo, @function
foo:
	.long 0
	.size foo, .-foo
	.section	.gcc_except_table.foo,"a",@progbits
.L0:
	.long 0
	.section	.eh_frame,"a",@progbits
	.long .L0
EOF
  if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
    if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
	 | grep "gc-sections option ignored" > /dev/null; then
      gcc_cv_ld_eh_gc_sections=no
    elif $gcc_cv_objdump -h conftest 2> /dev/null \
         | grep gcc_except_table > /dev/null; then
      gcc_cv_ld_eh_gc_sections=yes
      # If no COMDAT groups, the compiler will emit .gnu.linkonce.t. sections.
      if test x$gcc_cv_as_comdat_group != xyes; then
	gcc_cv_ld_eh_gc_sections=no
	cat > conftest.s <<EOF
	.section	.text
.globl _start
        .type _start, @function
_start:
	.long foo
	.size _start, .-_start
	.section	.gnu.linkonce.t.foo,"ax",@progbits
	.type foo, @function
foo:
	.long 0
	.size foo, .-foo
	.section	.gcc_except_table.foo,"a",@progbits
.L0:
	.long 0
	.section	.eh_frame,"a",@progbits
	.long .L0
EOF
	if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
	  if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
	       | grep "gc-sections option ignored" > /dev/null; then
	    gcc_cv_ld_eh_gc_sections=no
	  elif $gcc_cv_objdump -h conftest 2> /dev/null \
	       | grep gcc_except_table > /dev/null; then
	    gcc_cv_ld_eh_gc_sections=yes
	  fi
	fi
      fi
    fi
  fi
  rm -f conftest.s conftest.o conftest
fi
case "$target" in
  hppa*-*-linux*)
    # ??? This apparently exposes a binutils bug with PC-relative relocations.
    gcc_cv_ld_eh_gc_sections=no
    ;;
esac
if test x$gcc_cv_ld_eh_gc_sections = xyes; then
	AC_DEFINE(HAVE_LD_EH_GC_SECTIONS, 1,
  [Define if your linker supports garbage collection of
   sections in presence of EH frames.])
fi
AC_MSG_RESULT($gcc_cv_ld_eh_gc_sections)

AC_MSG_CHECKING(linker EH garbage collection of sections bug)
gcc_cv_ld_eh_gc_sections_bug=no
if test $in_tree_ld = yes ; then
  if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -lt 19 -o "$gcc_cv_gld_major_version" -lt 2 \
     && test $in_tree_ld_is_elf = yes; then
    gcc_cv_ld_eh_gc_sections_bug=yes
  fi
elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x -a x$gcc_cv_as_comdat_group = xyes; then
  gcc_cv_ld_eh_gc_sections_bug=yes
  cat > conftest.s <<EOF
	.section	.text
.globl _start
	.type _start, @function
_start:
	.long foo
	.size _start, .-_start
	.section	.text.startup.foo,"ax",@progbits
	.type foo, @function
foo:
	.long 0
	.size foo, .-foo
	.section	.gcc_except_table.foo,"a",@progbits
.L0:
	.long 0
	.section	.eh_frame,"a",@progbits
	.long .L0
EOF
  if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
    if $gcc_cv_ld -o conftest conftest.o --entry=_start --gc-sections 2>&1 \
	 | grep "gc-sections option ignored" > /dev/null; then
      :
    elif $gcc_cv_objdump -h conftest 2> /dev/null \
	 | grep gcc_except_table > /dev/null; then
      gcc_cv_ld_eh_gc_sections_bug=no
    fi
  fi
  rm -f conftest.s conftest.o conftest
fi
if test x$gcc_cv_ld_eh_gc_sections_bug = xyes; then
	AC_DEFINE(HAVE_LD_EH_GC_SECTIONS_BUG, 1,
  [Define if your linker has buggy garbage collection of
   sections support when .text.startup.foo like sections are used.])
fi
AC_MSG_RESULT($gcc_cv_ld_eh_gc_sections_bug)

# --------
# UNSORTED
# --------

AC_CACHE_CHECK(linker --as-needed support,
gcc_cv_ld_as_needed,
[gcc_cv_ld_as_needed=no
gcc_cv_ld_as_needed_option='--as-needed'
gcc_cv_ld_no_as_needed_option='--no-as-needed'
if test $in_tree_ld = yes ; then
  if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 \
     && test $in_tree_ld_is_elf = yes; then
    gcc_cv_ld_as_needed=yes
  fi
elif test x$gcc_cv_ld != x; then
	# Check if linker supports --as-needed and --no-as-needed options
	if $gcc_cv_ld --help 2>/dev/null | grep as-needed > /dev/null; then
		gcc_cv_ld_as_needed=yes
	else
	  case "$target" in
	    # Solaris 2 ld always supports -z ignore/-z record.
	    *-*-solaris2*)
	      gcc_cv_ld_as_needed=yes
	      gcc_cv_ld_as_needed_option="-z ignore"
	      gcc_cv_ld_no_as_needed_option="-z record"
	      ;;
	  esac
	fi
fi
# --as-needed/-z ignore can only be used if libgcc_s.so.1 uses
# dl_iterate_phdr, i.e. since Solaris 11.
case "$target" in
  *-*-solaris2.1[[1-9]]*)
    case "$target" in
    i?86-*-* | x86_64-*-*)
      if echo "$ld_ver" | grep GNU > /dev/null; then
        # Doesn't work with gld on Solaris/x86 due to PR ld/12320.
        gcc_cv_ld_as_needed=no
      fi
      ;;
    esac
    ;;
  *-*-solaris2*)
    gcc_cv_ld_as_needed=no
    ;;
esac
])
if test x"$gcc_cv_ld_as_needed" = xyes; then
	AC_DEFINE(HAVE_LD_AS_NEEDED, 1,
[Define if your linker supports --as-needed/--no-as-needed or equivalent options.])
	AC_DEFINE_UNQUOTED(LD_AS_NEEDED_OPTION, "$gcc_cv_ld_as_needed_option",
[Define to the linker option to ignore unused dependencies.])
	AC_DEFINE_UNQUOTED(LD_NO_AS_NEEDED_OPTION, "$gcc_cv_ld_no_as_needed_option",
[Define to the linker option to keep unused dependencies.])
fi

AC_MSG_CHECKING(linker mapfile support for clearing hardware capabilities)
saved_LDFLAGS="$LDFLAGS"
for clearcap_map in sol2-clearcapv2.map sol2-clearcap.map; do
  LDFLAGS="$saved_LDFLAGS -Wl,-M,${srcdir}/config/$clearcap_map"
  AC_LINK_IFELSE([int main(void) {return 0;}],
    [gcc_cv_ld_clearcap=yes; break], [gcc_cv_ld_clearcap=no])
done
LDFLAGS="$saved_LDFLAGS"
if test "x$gcc_cv_ld_clearcap" = xyes; then
  AC_DEFINE([HAVE_LD_CLEARCAP], 1,
[Define if the linker supports clearing hardware capabilities via mapfile.])
  AC_CONFIG_LINKS([clearcap.map:${srcdir}/config/$clearcap_map])
fi
AC_MSG_RESULT($gcc_cv_ld_clearcap)

case "$target:$tm_file" in
  powerpc64-*-freebsd* | powerpc64*-*-linux* | powerpc*-*-linux*rs6000/biarch64.h*)
  case "$target" in
     *le-*-linux*)
     emul_name="-melf64lppc"
      ;;
     *-*-linux*)
     emul_name="-melf64ppc"
      ;;
     *-*-freebsd*)
     emul_name="-melf64ppc_fbsd"
      ;;
  esac
    AC_CACHE_CHECK(linker support for omitting dot symbols,
    gcc_cv_ld_no_dot_syms,
    [gcc_cv_ld_no_dot_syms=no
    if test x"$ld_is_gold" = xyes; then
      gcc_cv_ld_no_dot_syms=yes
    elif test $in_tree_ld = yes ; then
      if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2; then
        gcc_cv_ld_no_dot_syms=yes
      fi
    elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x ; then
      cat > conftest1.s <<EOF
	.text
	bl .foo
EOF
      cat > conftest2.s <<EOF
	.section ".opd","aw"
	.align 3
	.globl foo
	.type foo,@function
foo:
	.quad .LEfoo,.TOC.@tocbase,0
	.text
.LEfoo:
	blr
	.size foo,.-.LEfoo
EOF
      if $gcc_cv_as -a64 -o conftest1.o conftest1.s > /dev/null 2>&1 \
         && $gcc_cv_as -a64 -o conftest2.o conftest2.s > /dev/null 2>&1 \
         && $gcc_cv_ld $emul_name -o conftest conftest1.o conftest2.o > /dev/null 2>&1; then
        gcc_cv_ld_no_dot_syms=yes
      fi
      rm -f conftest conftest1.o conftest2.o conftest1.s conftest2.s
    fi
    ])
    if test x"$gcc_cv_ld_no_dot_syms" = xyes; then
      AC_DEFINE(HAVE_LD_NO_DOT_SYMS, 1,
    [Define if your PowerPC64 linker only needs function descriptor syms.])
    fi

    AC_CACHE_CHECK(linker large toc support,
    gcc_cv_ld_large_toc,
    [gcc_cv_ld_large_toc=no
    if test x"$ld_is_gold" = xyes; then
      gcc_cv_ld_large_toc=yes
    elif test $in_tree_ld = yes ; then
      if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 21 -o "$gcc_cv_gld_major_version" -gt 2; then
        gcc_cv_ld_large_toc=yes
      fi
    elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x ; then
      cat > conftest.s <<EOF
	.section ".tbss","awT",@nobits
	.align 3
ie0:	.space 8
	.global _start
	.text
_start:
	addis 9,13,ie0@got@tprel@ha
	ld 9,ie0@got@tprel@l(9)
EOF
      if $gcc_cv_as -a64 -o conftest.o conftest.s > /dev/null 2>&1 \
         && $gcc_cv_ld $emul_name --no-toc-sort -o conftest conftest.o > /dev/null 2>&1; then
        gcc_cv_ld_large_toc=yes
      fi
      rm -f conftest conftest.o conftest.s
    fi
    ])
    if test x"$gcc_cv_ld_large_toc" = xyes; then
      AC_DEFINE(HAVE_LD_LARGE_TOC, 1,
    [Define if your PowerPC64 linker supports a large TOC.])
    fi
    ;;
esac

case "$target" in
  *-*-aix*)
    AC_CACHE_CHECK(linker large toc support,
    gcc_cv_ld_large_toc,
    [gcc_cv_ld_large_toc=no
    if test x$gcc_cv_as != x ; then
      cat > conftest.s <<EOF
	.toc
LC..1:
	.tc a[[TC]],a[[RW]]
	.extern a[[RW]]
	.csect .text[[PR]]
.largetoctest:
	addis 9,LC..1@u(2)
	ld 3,LC..1@l(9)
EOF
      if $gcc_cv_as -a64 -o conftest.o conftest.s > /dev/null 2>&1; then
        gcc_cv_ld_large_toc=yes
      fi
      rm -f conftest conftest.o conftest.s
    fi
    ])
    if test x"$gcc_cv_ld_large_toc" = xyes; then
      AC_DEFINE(HAVE_LD_LARGE_TOC, 1,
    [Define if your PowerPC64 linker supports a large TOC.])
    fi
    ;;
esac

AC_CACHE_CHECK(linker --build-id support,
  gcc_cv_ld_buildid,
  [gcc_cv_ld_buildid=no
  if test $in_tree_ld = yes ; then
    if test "$gcc_cv_gld_major_version" -eq 2 -a \
       "$gcc_cv_gld_minor_version" -ge 18 -o \
       "$gcc_cv_gld_major_version" -gt 2 \
       && test $in_tree_ld_is_elf = yes; then
      gcc_cv_ld_buildid=yes
    fi
  elif test x$gcc_cv_ld != x; then
    if $gcc_cv_ld --help 2>/dev/null | grep build-id > /dev/null; then
      gcc_cv_ld_buildid=yes
    fi
  fi])
if test x"$gcc_cv_ld_buildid" = xyes; then
  AC_DEFINE(HAVE_LD_BUILDID, 1,
  [Define if your linker supports --build-id.])
fi

AC_ARG_ENABLE(linker-build-id,
[AS_HELP_STRING([--enable-linker-build-id],
                [compiler will always pass --build-id to linker])],
[],
enable_linker_build_id=no)

if test x"$enable_linker_build_id" = xyes; then
  if test x"$gcc_cv_ld_buildid" = xyes; then
    AC_DEFINE(ENABLE_LD_BUILDID, 1,
    [Define if gcc should always pass --build-id to linker.])
  else
    AC_MSG_WARN(--build-id is not supported by your linker; --enable-linker-build-id ignored)
  fi
fi

# In binutils 2.21, GNU ld gained support for new emulations fully
# supporting the Solaris 2 ABI.  Detect their presence in the linker used.
AC_CACHE_CHECK(linker *_sol2 emulation support,
  gcc_cv_ld_sol2_emulation,
  [gcc_cv_ld_sol2_emulation=no
  if test $in_tree_ld = yes ; then
    if test "$gcc_cv_gld_major_version" -eq 2 -a \
       "$gcc_cv_gld_minor_version" -ge 21 -o \
       "$gcc_cv_gld_major_version" -gt 2 \
       && test $in_tree_ld_is_elf = yes; then
      gcc_cv_ld_sol2_emulation=yes
    fi
  elif test x$gcc_cv_ld != x; then
    if $gcc_cv_ld -V 2>/dev/null | sed -e '1,/Supported emulations/d;q' | \
       grep _sol2 > /dev/null; then
      gcc_cv_ld_sol2_emulation=yes
    fi
  fi])
if test x"$gcc_cv_ld_sol2_emulation" = xyes; then
  AC_DEFINE(HAVE_LD_SOL2_EMULATION, 1,
  [Define if your linker supports the *_sol2 emulations.])
fi

AC_CACHE_CHECK(linker --sysroot support,
  gcc_cv_ld_sysroot,
  [gcc_cv_ld_sysroot=no
  if test $in_tree_ld = yes ; then
      if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 16 -o "$gcc_cv_gld_major_version" -gt 2 ; then
        gcc_cv_ld_sysroot=yes
      fi
  elif test x$gcc_cv_ld != x; then 
    if $gcc_cv_ld --help 2>/dev/null | grep sysroot > /dev/null; then
      gcc_cv_ld_sysroot=yes
    fi
  fi])
if test x"$gcc_cv_ld_sysroot" = xyes; then
  AC_DEFINE(HAVE_LD_SYSROOT, 1,
  [Define if your linker supports --sysroot.])
fi	  

# Test for stack protector support in target C library.
AC_CACHE_CHECK(__stack_chk_fail in target C library,
      gcc_cv_libc_provides_ssp,
      [gcc_cv_libc_provides_ssp=no
    case "$target" in
       *-*-linux* | *-*-kfreebsd*-gnu | *-*-knetbsd*-gnu)
      # glibc 2.4 and later provides __stack_chk_fail and
      # either __stack_chk_guard, or TLS access to stack guard canary.
      GCC_GLIBC_VERSION_GTE_IFELSE([2], [4], [gcc_cv_libc_provides_ssp=yes], [
      [if test -f $target_header_dir/features.h \
	 && $EGREP '^[ 	]*#[ 	]*define[ 	]+__GNU_LIBRARY__[ 	]+([1-9][0-9]|[6-9])' \
	    $target_header_dir/features.h > /dev/null; then
	if $EGREP '^[ 	]*#[ 	]*define[ 	]+__UCLIBC__[ 	]+1' \
	     $target_header_dir/features.h > /dev/null && \
	     test -f $target_header_dir/bits/uClibc_config.h && \
	     $EGREP '^[ 	]*#[ 	]*define[ 	]+__UCLIBC_HAS_SSP__[ 	]+1' \
	     $target_header_dir/bits/uClibc_config.h > /dev/null; then
	  gcc_cv_libc_provides_ssp=yes
	fi
      # all versions of Bionic support stack protector
      elif test -f $target_header_dir/sys/cdefs.h \
        && $EGREP '^[  ]*#[    ]*define[       ]+__BIONIC__[   ]+1' \
           $target_header_dir/sys/cdefs.h > /dev/null; then
         gcc_cv_libc_provides_ssp=yes
      fi]])
	;;
       *-*-gnu*)
	 # Avoid complicated tests (see
	 # <http://gcc.gnu.org/ml/gcc/2008-10/msg00130.html>) and for now
	 # simply assert that glibc does provide this, which is true for all
	 # realistically usable GNU/Hurd configurations.
	 gcc_cv_libc_provides_ssp=yes;;
       *-*-darwin* | *-*-freebsd*)
	 AC_CHECK_FUNC(__stack_chk_fail,[gcc_cv_libc_provides_ssp=yes],
           [echo "no __stack_chk_fail on this target"])
        ;;
  *) gcc_cv_libc_provides_ssp=no ;;
    esac])

if test x$gcc_cv_libc_provides_ssp = xyes; then
  AC_DEFINE(TARGET_LIBC_PROVIDES_SSP, 1,
	    [Define if your target C library provides stack protector support])
fi

# Test for <sys/sdt.h> on the target.
GCC_TARGET_TEMPLATE([HAVE_SYS_SDT_H])
AC_MSG_CHECKING(sys/sdt.h in the target C library)
have_sys_sdt_h=no
if test -f $target_header_dir/sys/sdt.h; then
  have_sys_sdt_h=yes
  AC_DEFINE(HAVE_SYS_SDT_H, 1,
            [Define if your target C library provides sys/sdt.h])
fi
AC_MSG_RESULT($have_sys_sdt_h)

# Check if TFmode long double should be used by default or not.
# Some glibc targets used DFmode long double, but with glibc 2.4
# and later they can use TFmode.
case "$target" in
  powerpc*-*-linux* | \
  sparc*-*-linux* | \
  s390*-*-linux* | \
  alpha*-*-linux*)
    AC_ARG_WITH(long-double-128,
      [AS_HELP_STRING([--with-long-double-128],
		      [use 128-bit long double by default])],
      gcc_cv_target_ldbl128="$with_long_double_128",
      [GCC_GLIBC_VERSION_GTE_IFELSE([2], [4], [gcc_cv_target_ldbl128=yes], [
      [gcc_cv_target_ldbl128=no
      grep '^[ 	]*#[ 	]*define[ 	][ 	]*__LONG_DOUBLE_MATH_OPTIONAL' \
        $target_header_dir/bits/wordsize.h > /dev/null 2>&1 \
      && gcc_cv_target_ldbl128=yes
      ]])])
    ;;
esac
if test x$gcc_cv_target_ldbl128 = xyes; then
  AC_DEFINE(TARGET_DEFAULT_LONG_DOUBLE_128, 1,
	    [Define if TFmode long double should be the default])
fi

AC_MSG_CHECKING(dl_iterate_phdr in target C library)
gcc_cv_target_dl_iterate_phdr=unknown
case "$target" in
  # Restrict to Solaris 11+.  While most of the Solaris 11 linker changes
  # were backported to Solaris 10 Update 10, dl_iterate_phdr only lives in
  # libdl there, both complicating its use and breaking compatibility
  # between Solaris 10 updates.
  *-*-solaris2.1[[1-9]]*)
    # <link.h> needs both a dl_iterate_phdr declaration and support for
    # compilation with largefile support.
    if grep dl_iterate_phdr $target_header_dir/link.h > /dev/null 2>&1 \
      && grep 'large file capable' $target_header_dir/link.h > /dev/null 2>&1; then
      gcc_cv_target_dl_iterate_phdr=yes
    else
      gcc_cv_target_dl_iterate_phdr=no
    fi
    ;;
esac
GCC_TARGET_TEMPLATE([TARGET_DL_ITERATE_PHDR])
if test x$gcc_cv_target_dl_iterate_phdr = xyes; then
   AC_DEFINE(TARGET_DL_ITERATE_PHDR, 1,
[Define if your target C library provides the `dl_iterate_phdr' function.])
fi
AC_MSG_RESULT($gcc_cv_target_dl_iterate_phdr)

# We no longer support different GC mechanisms.  Emit an error if
# the user configures with --with-gc.
AC_ARG_WITH(gc,
[AS_HELP_STRING([--with-gc={page,zone}],
		[this option is not supported anymore.  It used to choose
		 the garbage collection mechanism to use with the compiler])],
[AC_MSG_ERROR([Configure option --with-gc is only supported up to GCC 4.7.x])],
[])

# Libraries to use on the host.  This will normally be set by the top
# level Makefile.  Here we simply capture the value for our Makefile.
if test -z "${HOST_LIBS+set}"; then
  HOST_LIBS=
fi
AC_SUBST(HOST_LIBS)

# Use the system's zlib library.
zlibdir=-L../zlib
zlibinc="-I\$(srcdir)/../zlib"
AC_ARG_WITH(system-zlib,
[AS_HELP_STRING([--with-system-zlib], [use installed libz])],
zlibdir=
zlibinc=
)
AC_SUBST(zlibdir)
AC_SUBST(zlibinc)

dnl Very limited version of automake's enable-maintainer-mode

AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
  dnl maintainer-mode is disabled by default
  AC_ARG_ENABLE(maintainer-mode,
[AS_HELP_STRING([--enable-maintainer-mode],
                [enable make rules and dependencies not useful
                 (and sometimes confusing) to the casual installer])],
      maintainer_mode=$enableval,
      maintainer_mode=no)

AC_MSG_RESULT($maintainer_mode)

if test "$maintainer_mode" = "yes"; then
  MAINT=''
else
  MAINT='#'
fi
AC_SUBST(MAINT)dnl

dnl Whether to prevent multiple front-ends from linking at the same time

AC_MSG_CHECKING([whether to avoid linking multiple front-ends at once])
  AC_ARG_ENABLE(link-mutex,
[AS_HELP_STRING([--enable-link-mutex],
		[avoid linking multiple front-ends at once to avoid thrashing
		 on the build machine])],
      do_link_mutex=$enableval,
      do_link_mutex=no)
AC_MSG_RESULT($do_link_mutex)

if test "$do_link_mutex" = "yes"; then
   DO_LINK_MUTEX=true
else
   DO_LINK_MUTEX=false
fi
AC_SUBST(DO_LINK_MUTEX)

# --------------
# Language hooks
# --------------

# Make empty files to contain the specs and options for each language.
# Then add #include lines to for a compiler that has specs and/or options.

subdirs=
lang_opt_files=
lang_specs_files=
lang_tree_files=
# These (without "all_") are set in each config-lang.in.
# `language' must be a single word so is spelled singularly.
all_languages=
all_compilers=
all_outputs='Makefile'
# List of language makefile fragments.
all_lang_makefrags=
# Additional files for gengtype
all_gtfiles="$target_gtfiles"

# These are the languages that are set in --enable-languages,
# and are available in the GCC tree.
all_selected_languages=

# Add the language fragments.
# Languages are added via two mechanisms.  Some information must be
# recorded in makefile variables, these are defined in config-lang.in.
# We accumulate them and plug them into the main Makefile.
# The other mechanism is a set of hooks for each of the main targets
# like `clean', `install', etc.

language_hooks="Make-hooks"

for lang in ${srcdir}/*/config-lang.in
do
changequote(,)dnl
	test "$lang" = "${srcdir}/*/config-lang.in" && continue

        lang_alias=`sed -n -e 's,^language=['"'"'"'"]\(.*\)["'"'"'"'].*$,\1,p' -e 's,^language=\([^   ]*\).*$,\1,p' $lang`
        if test "x$lang_alias" = x
        then
              echo "$lang doesn't set \$language." 1>&2
              exit 1
        fi
        subdir="`echo $lang | sed -e 's,^.*/\([^/]*\)/config-lang.in$,\1,'`"
        subdirs="$subdirs $subdir"

	# $gcc_subdir is where the gcc integration files are to be found
	# for a language, both for internal compiler purposes (compiler
	# sources implementing front-end to GCC tree converters), and for
	# build infrastructure purposes (Make-lang.in, etc.)
	#
	# This will be <subdir> (relative to $srcdir) if a line like 
	# gcc_subdir="<subdir>" or gcc_subdir=<subdir>
	# is found in <langdir>/config-lang.in, and will remain <langdir>
	# otherwise.
	#
	# Except for the language alias (fetched above), the regular
	# "config-lang.in" contents are always retrieved from $gcc_subdir,
	# so a <langdir>/config-lang.in setting gcc_subdir typically sets
	# only this and the language alias.

        gcc_subdir=`sed -n -e 's,^gcc_subdir=['"'"'"'"]\(.*\)["'"'"'"'].*$,\1,p' -e 's,^gcc_subdir=\([^   ]*\).*$,\1,p' $lang`
        if [ "$gcc_subdir" = "" ]; then
           gcc_subdir="$subdir"
        fi

        case ",$enable_languages," in
        *,$lang_alias,*)
            all_selected_languages="$all_selected_languages $lang_alias"
            if test -f $srcdir/$gcc_subdir/lang-specs.h; then
                lang_specs_files="$lang_specs_files $srcdir/$gcc_subdir/lang-specs.h"
	    fi
	    ;;
        esac
changequote([,])dnl

	language=
	boot_language=
	compilers=
	outputs=
	gtfiles=
	subdir_requires=
	. ${srcdir}/$gcc_subdir/config-lang.in
	if test "x$language" = x
	then
		echo "${srcdir}/$gcc_subdir/config-lang.in doesn't set \$language." 1>&2
		exit 1
	fi

	ok=:
        case ",$enable_languages," in
        	*,$lang_alias,*) ;;
		*)
			for i in $subdir_requires; do
				test -f "${srcdir}/$i/config-lang.in" && continue
				ok=false
				break
			done
		;;
	esac
	$ok || continue

	all_lang_makefrags="$all_lang_makefrags \$(srcdir)/$gcc_subdir/Make-lang.in"
	if test -f $srcdir/$gcc_subdir/lang.opt; then
	    lang_opt_files="$lang_opt_files $srcdir/$gcc_subdir/lang.opt"
	    all_opt_files="$all_opt_files $srcdir/$gcc_subdir/lang.opt"
	fi
	if test -f $srcdir/$gcc_subdir/$subdir-tree.def; then
	    lang_tree_files="$lang_tree_files $srcdir/$gcc_subdir/$subdir-tree.def"
	fi
	all_languages="$all_languages $language"
	all_compilers="$all_compilers $compilers"
	all_outputs="$all_outputs $outputs"
	all_gtfiles="$all_gtfiles [[$subdir]] $gtfiles"
        case ",$enable_languages," in
        	*,lto,*)
		    AC_DEFINE(ENABLE_LTO, 1, [Define to enable LTO support.])
		    enable_lto=yes
		    AC_SUBST(enable_lto)
		    ;;
		*) ;;
	esac
done

check_languages=
for language in $all_selected_languages
do
	check_languages="$check_languages check-$language"
done

# We link each language in with a set of hooks, reached indirectly via
# lang.${target}.  Only do so for selected languages.

rm -f Make-hooks
touch Make-hooks
target_list="all.cross start.encap rest.encap tags \
	install-common install-man install-info install-pdf install-html dvi \
	pdf html uninstall info man srcextra srcman srcinfo \
	mostlyclean clean distclean maintainer-clean install-plugin"

for t in $target_list
do
	x=
	for lang in $all_selected_languages
	do
		x="$x $lang.$t"
	done
	echo "lang.$t: $x" >> Make-hooks
done

# --------
# Option include files
# --------

${AWK} -f $srcdir/opt-include.awk $all_opt_files > option-includes.mk
option_includes="option-includes.mk"
AC_SUBST_FILE(option_includes)

# --------
# UNSORTED
# --------

# Create .gdbinit.

echo "dir ." > .gdbinit
echo "dir ${srcdir}" >> .gdbinit
if test x$gdb_needs_out_file_path = xyes
then
	echo "dir ${srcdir}/config/"`dirname ${out_file}` >> .gdbinit
fi
if test "x$subdirs" != x; then
	for s in $subdirs
	do
		echo "dir ${srcdir}/$s" >> .gdbinit
	done
fi
echo "source ${srcdir}/gdbinit.in" >> .gdbinit
echo "python import sys; sys.path.append('${srcdir}'); import gdbhooks" >> .gdbinit

# Put a breakpoint on __asan_report_error to help with debugging buffer
# overflow.
case "$CFLAGS" in
*-fsanitize=address*)
  echo "source ${srcdir}/gdbasan.in" >> .gdbinit
  ;;
esac

gcc_tooldir='$(libsubdir)/$(libsubdir_to_prefix)$(target_noncanonical)'
AC_SUBST(gcc_tooldir)
AC_SUBST(dollar)

# Find a directory in which to install a shared libgcc.

AC_ARG_ENABLE(version-specific-runtime-libs,
[AS_HELP_STRING([--enable-version-specific-runtime-libs],
                [specify that runtime libraries should be
                 installed in a compiler-specific directory])])

# Set default prefix canonicalization.

AC_ARG_ENABLE(canonical-prefixes,
[  --enable-canonical-prefixes
                          enable or disable prefix canonicalization],
[],
enable_canonical_prefixes=yes)
if test x"$enable_canonical_prefixes" = xyes; then
  AC_DEFINE(ENABLE_CANONICAL_PREFIXES,
            1, [Define to enable prefix canonicalization.])
fi

# Substitute configuration variables
AC_SUBST(subdirs)
AC_SUBST(srcdir)
AC_SUBST(all_compilers)
AC_SUBST(all_gtfiles)
AC_SUBST(all_lang_makefrags)
AC_SUBST(all_languages)
AC_SUBST(all_selected_languages)
AC_SUBST(build_exeext)
AC_SUBST(build_install_headers_dir)
AC_SUBST(build_xm_file_list)
AC_SUBST(build_xm_include_list)
AC_SUBST(build_xm_defines)
AC_SUBST(build_file_translate)
AC_SUBST(check_languages)
AC_SUBST(cpp_install_dir)
AC_SUBST(xmake_file)
AC_SUBST(tmake_file)
AC_SUBST(TM_ENDIAN_CONFIG)
AC_SUBST(TM_MULTILIB_CONFIG)
AC_SUBST(TM_MULTILIB_EXCEPTIONS_CONFIG)
AC_SUBST(extra_gcc_objs)
AC_SUBST(user_headers_inc_next_pre)
AC_SUBST(user_headers_inc_next_post)
AC_SUBST(extra_headers_list)
AC_SUBST(extra_objs)
AC_SUBST(extra_programs)
AC_SUBST(float_h_file)
AC_SUBST(gcc_config_arguments)
AC_SUBST(gcc_gxx_include_dir)
AC_SUBST(gcc_gxx_include_dir_add_sysroot)
AC_SUBST(host_exeext)
AC_SUBST(host_xm_file_list)
AC_SUBST(host_xm_include_list)
AC_SUBST(host_xm_defines)
AC_SUBST(out_host_hook_obj)
AC_SUBST(install)
AC_SUBST(lang_opt_files)
AC_SUBST(lang_specs_files)
AC_SUBST(lang_tree_files)
AC_SUBST(local_prefix)
AC_SUBST(md_file)
AC_SUBST(objc_boehm_gc)
AC_SUBST(out_file)
AC_SUBST(out_object_file)
AC_SUBST(common_out_file)
AC_SUBST(common_out_object_file)
AC_SUBST(tm_file_list)
AC_SUBST(tm_include_list)
AC_SUBST(tm_defines)
AC_SUBST(tm_p_file_list)
AC_SUBST(tm_p_include_list)
AC_SUBST(xm_file_list)
AC_SUBST(xm_include_list)
AC_SUBST(xm_defines)
AC_SUBST(use_gcc_stdint)
AC_SUBST(c_target_objs)
AC_SUBST(cxx_target_objs)
AC_SUBST(fortran_target_objs)
AC_SUBST(target_cpu_default)

AC_SUBST_FILE(language_hooks)

# Echo link setup.
if test x${build} = x${host} ; then
  if test x${host} = x${target} ; then
    echo "Links are now set up to build a native compiler for ${target}." 1>&2
  else
    echo "Links are now set up to build a cross-compiler" 1>&2
    echo " from ${host} to ${target}." 1>&2
  fi
else
  if test x${host} = x${target} ; then
    echo "Links are now set up to build (on ${build}) a native compiler" 1>&2
    echo " for ${target}." 1>&2
  else
    echo "Links are now set up to build (on ${build}) a cross-compiler" 1>&2
    echo " from ${host} to ${target}." 1>&2
  fi
fi

AC_ARG_VAR(GMPLIBS,[How to link GMP])
AC_ARG_VAR(GMPINC,[How to find GMP include files])

AC_ARG_VAR(ISLLIBS,[How to link ISL])
AC_ARG_VAR(ISLINC,[How to find ISL include files])

AC_ARG_VAR(CLOOGLIBS,[How to link CLOOG])
AC_ARG_VAR(CLOOGINC,[How to find CLOOG include files])
if test "x${CLOOGLIBS}" != "x" ; then 
   AC_DEFINE(HAVE_cloog, 1, [Define if cloog is in use.])

  # Check whether isl_schedule_constraints_compute_schedule is available;
  # it's new in ISL-0.13.
  saved_CFLAGS="$CFLAGS"
  CFLAGS="$CFLAGS $ISLINC"
  saved_LIBS="$LIBS"
  LIBS="$LIBS $CLOOGLIBS $ISLLIBS $GMPLIBS"

  AC_MSG_CHECKING([Checking for isl_schedule_constraints_compute_schedule])
  AC_TRY_LINK([#include <isl/schedule.h>],
              [isl_schedule_constraints_compute_schedule (NULL);],
              [ac_has_isl_schedule_constraints_compute_schedule=yes],
              [ac_has_isl_schedule_constraints_compute_schedule=no])
  AC_MSG_RESULT($ac_has_isl_schedule_constraints_compute_schedule)

  LIBS="$saved_LIBS"
  CFLAGS="$saved_CFLAGS"

  if test x"$ac_has_isl_schedule_constraints_compute_schedule" = x"yes"; then
     AC_DEFINE(HAVE_ISL_SCHED_CONSTRAINTS_COMPUTE_SCHEDULE, 1,
               [Define if isl_schedule_constraints_compute_schedule exists.])
  fi
fi


# Check for plugin support
AC_ARG_ENABLE(plugin,
[AS_HELP_STRING([--enable-plugin], [enable plugin support])],
enable_plugin=$enableval,
enable_plugin=yes; default_plugin=yes)

pluginlibs=

case "${host}" in
  *-*-darwin*)
    if test x$build = x$host; then
      export_sym_check="nm${exeext} -g"
    elif test x$host = x$target; then
      export_sym_check="$gcc_cv_nm -g"
    else
      export_sym_check=
    fi
  ;;
  *)
    if test x$build = x$host; then
      export_sym_check="objdump${exeext} -T"
    elif test x$host = x$target; then
      export_sym_check="$gcc_cv_objdump -T"
    else
      export_sym_check=
    fi
  ;;
esac

if test x"$enable_plugin" = x"yes"; then

  AC_MSG_CHECKING([for exported symbols])
  if test "x$export_sym_check" != x; then
    echo "int main() {return 0;} int foobar() {return 0;}" > conftest.c
    ${CC} ${CFLAGS} ${LDFLAGS} conftest.c -o conftest$ac_exeext > /dev/null 2>&1
    if $export_sym_check conftest$ac_exeext | grep -q foobar > /dev/null; then
      : # No need to use a flag
      AC_MSG_RESULT([yes])
    else
      AC_MSG_RESULT([yes])
      AC_MSG_CHECKING([for -rdynamic])
      ${CC} ${CFLAGS} ${LDFLAGS} -rdynamic conftest.c -o conftest$ac_exeext > /dev/null 2>&1
      if $export_sym_check conftest$ac_exeext | grep -q foobar > /dev/null; then
        plugin_rdynamic=yes
        pluginlibs="-rdynamic"
      else
        plugin_rdynamic=no
        enable_plugin=no
      fi
      AC_MSG_RESULT([$plugin_rdynamic])
    fi
  else
    AC_MSG_RESULT([unable to check])
  fi

  # Check -ldl
  saved_LIBS="$LIBS"
  AC_SEARCH_LIBS([dlopen], [dl])
  if test x"$ac_cv_search_dlopen" = x"-ldl"; then
    pluginlibs="$pluginlibs -ldl"
  fi
  LIBS="$saved_LIBS"

  # Check that we can build shared objects with -fPIC -shared
  saved_LDFLAGS="$LDFLAGS"
  saved_CFLAGS="$CFLAGS"
  case "${host}" in
    *-*-darwin*)
      CFLAGS=`echo $CFLAGS | sed s/-mdynamic-no-pic//g`
      CFLAGS="$CFLAGS -fPIC"
      LDFLAGS="$LDFLAGS -shared -undefined dynamic_lookup"
    ;;
    *)
      CFLAGS="$CFLAGS -fPIC"
      LDFLAGS="$LDFLAGS -fPIC -shared"
    ;;
  esac
  AC_MSG_CHECKING([for -fPIC -shared])
  AC_TRY_LINK(
    [extern int X;],[return X == 0;],
    [AC_MSG_RESULT([yes]); have_pic_shared=yes],
    [AC_MSG_RESULT([no]); have_pic_shared=no])
  if test x"$have_pic_shared" != x"yes" -o x"$ac_cv_search_dlopen" = x"no"; then
    pluginlibs=
    enable_plugin=no
  fi
  LDFLAGS="$saved_LDFLAGS"
  CFLAGS="$saved_CFLAGS"

  # If plugin support had been requested but not available, fail.
  if test x"$enable_plugin" = x"no" ; then
    if test x"$default_plugin" != x"yes"; then
      AC_MSG_ERROR([
Building GCC with plugin support requires a host that supports
-fPIC, -shared, -ldl and -rdynamic.])
    fi
  fi
fi

AC_SUBST(pluginlibs)
AC_SUBST(enable_plugin)
if test x"$enable_plugin" = x"yes"; then
  AC_DEFINE(ENABLE_PLUGIN, 1, [Define to enable plugin support.])
fi


# Enable --enable-host-shared
AC_ARG_ENABLE(host-shared,
[AS_HELP_STRING([--enable-host-shared],
		[build host code as shared libraries])],
[PICFLAG=-fPIC], [PICFLAG=])
AC_SUBST(enable_host_shared)
AC_SUBST(PICFLAG)


AC_ARG_ENABLE(libquadmath-support,
[AS_HELP_STRING([--disable-libquadmath-support],
  [disable libquadmath support for Fortran])],
ENABLE_LIBQUADMATH_SUPPORT=$enableval,
ENABLE_LIBQUADMATH_SUPPORT=yes)
if test "${ENABLE_LIBQUADMATH_SUPPORT}" != "no" ; then
  AC_DEFINE(ENABLE_LIBQUADMATH_SUPPORT, 1,
            [Define to 1 to enable libquadmath support])
fi


warn_frame_larger_than_extra_text=
AC_ARG_WITH(warn-frame-larger-than-extra-text,
[  --with-warn-frame-larger-than-extra-text=TEXT
                          specifies extra text for frame size warnings],
[case "${withval}" in
yes)	AC_MSG_ERROR(bad value ${withval} given for frame size warning text) ;;
no)	;;
*)	warn_frame_larger_than_extra_text="$withval" ;;
esac])
AC_DEFINE_UNQUOTED(WARN_FRAME_LARGER_THAN_EXTRA_TEXT,
                   "$warn_frame_larger_than_extra_text",
                   [Define to be extra text for frame size warnings.])


# Specify what hash style to use by default.
AC_ARG_WITH([linker-hash-style],
[AC_HELP_STRING([--with-linker-hash-style={sysv,gnu,both}],
                [specify the linker hash style])],
[case x"$withval" in
   xsysv)
     LINKER_HASH_STYLE=sysv
     ;;
   xgnu)
     LINKER_HASH_STYLE=gnu
     ;;
   xboth)
     LINKER_HASH_STYLE=both
     ;;
   *)
     AC_MSG_ERROR([$withval is an invalid option to --with-linker-hash-style])
     ;;
 esac],
[LINKER_HASH_STYLE=''])
if test x"${LINKER_HASH_STYLE}" != x; then
  AC_DEFINE_UNQUOTED(LINKER_HASH_STYLE, "$LINKER_HASH_STYLE",
                                         [The linker hash style])
fi

# Configure the subdirectories
# AC_CONFIG_SUBDIRS($subdirs)

# Create the Makefile
# and configure language subdirectories
AC_CONFIG_FILES($all_outputs)

AC_CONFIG_COMMANDS([default],
[
case ${CONFIG_HEADERS} in
  *auto-host.h:config.in*)
  echo > cstamp-h ;;
esac
# Make sure all the subdirs exist.
for d in $subdirs doc build common c-family
do
    test -d $d || mkdir $d
done
], 
[subdirs='$subdirs'])
AC_OUTPUT