From 1271761f530c0050154e8d526b95f952df551751 Mon Sep 17 00:00:00 2001
From: Keith Obenschain <obenschaink@gmail.com>
Date: Fri, 23 Mar 2012 17:14:06 -0400
Subject: Modifications to enable OpenMP in Android.

This patch enables OpenMP support in the Android NDK by modifying the following:

Specify that pthreads are supported in -lc instead of -lpthread (linux-android.h)
Change the order of ANDROID_LIB_SPEC and LINUX_TARGET_LIB_SPEC so the above change will take precedence (linux-eabi.h)

Modified autoconf for libgomp to check to see if the pthread libraries exist in libc (configure.ac)

Added include to env.c so PAGE_SIZE is defined.

To enable these changes, add "--enable-libgomp" to configure command under build-gcc.sh.

Change-Id: I8b460159b768f64f5198ef5494346cdf75510250
Signed-off-by: Keith Obenschain <obenschaink@gmail.com>
---
 gcc-4.4.3/gcc/config/arm/linux-eabi.h |  2 +-
 gcc-4.4.3/gcc/config/linux-android.h  |  3 ++-
 gcc-4.4.3/libgomp/configure           | 50 +++++++++++++++++++++++++++++++++++
 gcc-4.4.3/libgomp/configure.ac        |  9 ++++++-
 gcc-4.4.3/libgomp/env.c               |  1 +
 5 files changed, 62 insertions(+), 3 deletions(-)

(limited to 'gcc-4.4.3')

diff --git a/gcc-4.4.3/gcc/config/arm/linux-eabi.h b/gcc-4.4.3/gcc/config/arm/linux-eabi.h
index 2ca881890..6ab0f52df 100644
--- a/gcc-4.4.3/gcc/config/arm/linux-eabi.h
+++ b/gcc-4.4.3/gcc/config/arm/linux-eabi.h
@@ -82,7 +82,7 @@
 #undef  LIB_SPEC
 #define LIB_SPEC                                           \
   LINUX_OR_ANDROID_LD (LINUX_TARGET_LIB_SPEC,                  \
-                      LINUX_TARGET_LIB_SPEC " " ANDROID_LIB_SPEC)
+                      ANDROID_LIB_SPEC " " LINUX_TARGET_LIB_SPEC )
 
 #undef STARTFILE_SPEC
 #define STARTFILE_SPEC \
diff --git a/gcc-4.4.3/gcc/config/linux-android.h b/gcc-4.4.3/gcc/config/linux-android.h
index 5ca3858a2..f2a3d9c6f 100644
--- a/gcc-4.4.3/gcc/config/linux-android.h
+++ b/gcc-4.4.3/gcc/config/linux-android.h
@@ -50,7 +50,8 @@
   "%{!frtti:%{!fno-rtti: -fno-rtti}}"
 
 #define ANDROID_LIB_SPEC \
-  "%{!static: -ldl}"
+  "%{!static: -ldl} \
+  %{pthread:-lc}"
 
 #define ANDROID_STARTFILE_SPEC						\
   "%{!shared:"								\
diff --git a/gcc-4.4.3/libgomp/configure b/gcc-4.4.3/libgomp/configure
index 5db715cf3..b5cfeb9ef 100755
--- a/gcc-4.4.3/libgomp/configure
+++ b/gcc-4.4.3/libgomp/configure
@@ -17364,6 +17364,50 @@ else
   echo "$as_me: failed program was:" >&5
 sed 's/^/| /' conftest.$ac_ext >&5
 
+CFLAGS="$save_CFLAGS" LIBS="$LIBS"
+  cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#include <pthread.h>
+     void *g(void *d) { return NULL; }
+int
+main ()
+{
+pthread_t t; pthread_create(&t,NULL,g,NULL);
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext conftest$ac_exeext
+if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+  (eval $ac_link) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+	 { ac_try='test -z "$ac_c_werror_flag"
+			 || test ! -s conftest.err'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } &&
+	 { ac_try='test -s conftest$ac_exeext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  :
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
 CFLAGS="$save_CFLAGS" LIBS="-lpthread $LIBS"
   cat >conftest.$ac_ext <<_ACEOF
 /* confdefs.h.  */
@@ -17415,6 +17459,9 @@ fi
 rm -f conftest.err conftest.$ac_objext \
       conftest$ac_exeext conftest.$ac_ext
 fi
+rm -f conftest.err conftest.$ac_objext \
+      conftest$ac_exeext conftest.$ac_ext
+fi
 rm -f conftest.err conftest.$ac_objext \
       conftest$ac_exeext conftest.$ac_ext
 
@@ -22302,6 +22349,9 @@ ac_configure_args="${multilib_arg} ${ac_configure_args}"
 multi_basedir="$multi_basedir"
 CONFIG_SHELL=${CONFIG_SHELL-/bin/sh}
 CC="$CC"
+CXX="$CXX"
+GFORTRAN="$GFORTRAN"
+GCJ="$GCJ"
 AMDEP_TRUE="$AMDEP_TRUE" ac_aux_dir="$ac_aux_dir"
 
 
diff --git a/gcc-4.4.3/libgomp/configure.ac b/gcc-4.4.3/libgomp/configure.ac
index a46f99c60..5bafe61d1 100644
--- a/gcc-4.4.3/libgomp/configure.ac
+++ b/gcc-4.4.3/libgomp/configure.ac
@@ -168,6 +168,13 @@ AC_LINK_IFELSE(
    void *g(void *d) { return NULL; }],
   [pthread_t t; pthread_create(&t,NULL,g,NULL);])],
  [XPCFLAGS=" -Wc,-pthread"],
+ [CFLAGS="$save_CFLAGS" LIBS="$LIBS"
+  AC_LINK_IFELSE(
+   [AC_LANG_PROGRAM(
+    [#include <pthread.h>
+     void *g(void *d) { return NULL; }],
+    [pthread_t t; pthread_create(&t,NULL,g,NULL);])],
+   [],
  [CFLAGS="$save_CFLAGS" LIBS="-lpthread $LIBS"
   AC_LINK_IFELSE(
    [AC_LANG_PROGRAM(
@@ -175,7 +182,7 @@ AC_LINK_IFELSE(
      void *g(void *d) { return NULL; }],
     [pthread_t t; pthread_create(&t,NULL,g,NULL);])],
    [],
-   [AC_MSG_ERROR([Pthreads are required to build libgomp])])])
+   [AC_MSG_ERROR([Pthreads are required to build libgomp])])])])
 
 # Check for functions needed.
 AC_CHECK_FUNCS(getloadavg clock_gettime strtoull)
diff --git a/gcc-4.4.3/libgomp/env.c b/gcc-4.4.3/libgomp/env.c
index c870433f3..6809fdfa1 100644
--- a/gcc-4.4.3/libgomp/env.c
+++ b/gcc-4.4.3/libgomp/env.c
@@ -43,6 +43,7 @@
 #endif
 #include <limits.h>
 #include <errno.h>
+#include <asm/page.h>
 
 #ifndef HAVE_STRTOULL
 # define strtoull(ptr, eptr, base) strtoul (ptr, eptr, base)
-- 
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