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Diffstat (limited to 'gcc-4.9/gcc/cp/g++spec.c')
| -rw-r--r-- | gcc-4.9/gcc/cp/g++spec.c | 405 |
1 files changed, 405 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/cp/g++spec.c b/gcc-4.9/gcc/cp/g++spec.c new file mode 100644 index 000000000..79117673b --- /dev/null +++ b/gcc-4.9/gcc/cp/g++spec.c @@ -0,0 +1,405 @@ +/* Specific flags and argument handling of the C++ front end. + Copyright (C) 1996-2014 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/>. */ + +#include "config.h" +#include "system.h" +#include "coretypes.h" +#include "tm.h" +#include "gcc.h" +#include "opts.h" + +/* This bit is set if we saw a `-xfoo' language specification. */ +#define LANGSPEC (1<<1) +/* This bit is set if they did `-lm' or `-lmath'. */ +#define MATHLIB (1<<2) +/* This bit is set if they did `-lrt' or equivalent. */ +#define TIMELIB (1<<3) +/* This bit is set if they did `-lc'. */ +#define WITHLIBC (1<<4) +/* Skip this option. */ +#define SKIPOPT (1<<5) + +#ifndef MATH_LIBRARY +#define MATH_LIBRARY "m" +#endif +#ifndef MATH_LIBRARY_PROFILE +#define MATH_LIBRARY_PROFILE MATH_LIBRARY +#endif + +#ifndef TIME_LIBRARY +#define TIME_LIBRARY "" +#endif + +#ifndef LIBSTDCXX +#define LIBSTDCXX "stdc++" +#endif +#ifndef LIBSTDCXX_PROFILE +#define LIBSTDCXX_PROFILE LIBSTDCXX +#endif +#ifndef LIBSTDCXX_STATIC +#define LIBSTDCXX_STATIC NULL +#endif + +void +lang_specific_driver (struct cl_decoded_option **in_decoded_options, + unsigned int *in_decoded_options_count, + int *in_added_libraries) +{ + unsigned int i, j; + + /* If nonzero, the user gave us the `-p' or `-pg' flag. */ + int saw_profile_flag = 0; + + /* What do with libstdc++: + -1 means we should not link in libstdc++ + 0 means we should link in libstdc++ if it is needed + 1 means libstdc++ is needed and should be linked in. + 2 means libstdc++ is needed and should be linked statically. */ + int library = 0; + + /* The number of arguments being added to what's in argv, other than + libraries. We use this to track the number of times we've inserted + -xc++/-xnone. */ + int added = 0; + + /* The new argument list will be contained in this. */ + struct cl_decoded_option *new_decoded_options; + + /* Nonzero if we saw a `-xfoo' language specification on the + command line. Used to avoid adding our own -xc++ if the user + already gave a language for the file. */ + int saw_speclang = 0; + + /* "-lm" or "-lmath" if it appears on the command line. */ + const struct cl_decoded_option *saw_math = NULL; + + /* "-lrt" or eqivalent if it appears on the command line. */ + const struct cl_decoded_option *saw_time = NULL; + + /* "-lc" if it appears on the command line. */ + const struct cl_decoded_option *saw_libc = NULL; + + /* An array used to flag each argument that needs a bit set for + LANGSPEC, MATHLIB, TIMELIB, or WITHLIBC. */ + int *args; + + /* By default, we throw on the math library if we have one. */ + int need_math = (MATH_LIBRARY[0] != '\0'); + + /* By default, we throw on the time library if we have one. */ + int need_time = (TIME_LIBRARY[0] != '\0'); + + /* True if we saw -static. */ + int static_link = 0; + + /* True if we should add -shared-libgcc to the command-line. */ + int shared_libgcc = 1; + + /* The total number of arguments with the new stuff. */ + unsigned int argc; + + /* The argument list. */ + struct cl_decoded_option *decoded_options; + + /* The number of libraries added in. */ + int added_libraries; + + /* The total number of arguments with the new stuff. */ + unsigned int num_args = 1; + + argc = *in_decoded_options_count; + decoded_options = *in_decoded_options; + added_libraries = *in_added_libraries; + + args = XCNEWVEC (int, argc); + + for (i = 1; i < argc; i++) + { + const char *arg = decoded_options[i].arg; + if (decoded_options[i].errors & CL_ERR_MISSING_ARG) + continue; /* Avoid examining arguments of options missing them. */ + + switch (decoded_options[i].opt_index) + { + case OPT_nostdlib: + case OPT_nodefaultlibs: + library = -1; + break; + + case OPT_l: + if (strcmp (arg, MATH_LIBRARY) == 0) + { + args[i] |= MATHLIB; + need_math = 0; + } + else if (strcmp (arg, TIME_LIBRARY) == 0) + { + args[i] |= TIMELIB; + need_time = 0; + } + else if (strcmp (arg, "c") == 0) + args[i] |= WITHLIBC; + else + /* Unrecognized libraries (e.g. -lfoo) may require libstdc++. */ + library = (library == 0) ? 1 : library; + break; + + case OPT_pg: + case OPT_p: + saw_profile_flag++; + break; + + case OPT_x: + if (library == 0 + && (strcmp (arg, "c++") == 0 + || strcmp (arg, "c++-cpp-output") == 0 + || strcmp (arg, "objective-c++") == 0 + || strcmp (arg, "objective-c++-cpp-output") == 0)) + library = 1; + + saw_speclang = 1; + break; + + case OPT_Xlinker: + case OPT_Wl_: + /* Arguments that go directly to the linker might be .o files, + or something, and so might cause libstdc++ to be needed. */ + if (library == 0) + library = 1; + break; + + case OPT_c: + case OPT_S: + case OPT_E: + case OPT_M: + case OPT_MM: + case OPT_fsyntax_only: + /* Don't specify libraries if we won't link, since that would + cause a warning. */ + library = -1; + break; + + case OPT_static: + static_link = 1; + break; + + case OPT_static_libgcc: + shared_libgcc = 0; + break; + + case OPT_static_libstdc__: + library = library >= 0 ? 2 : library; + args[i] |= SKIPOPT; + break; + + case OPT_SPECIAL_input_file: + { + int len; + + /* We don't do this anymore, since we don't get them with minus + signs on them. */ + if (arg[0] == '\0' || arg[1] == '\0') + continue; + + if (saw_speclang) + { + saw_speclang = 0; + continue; + } + + /* If the filename ends in .[chi], put options around it. + But not if a specified -x option is currently active. */ + len = strlen (arg); + if (len > 2 + && (arg[len - 1] == 'c' + || arg[len - 1] == 'i' + || arg[len - 1] == 'h') + && arg[len - 2] == '.') + { + args[i] |= LANGSPEC; + added += 2; + } + + /* If we don't know that this is a header file, we might + need to be linking in the libraries. */ + if (library == 0) + { + if ((len <= 2 || strcmp (arg + (len - 2), ".H") != 0) + && (len <= 2 || strcmp (arg + (len - 2), ".h") != 0) + && (len <= 4 || strcmp (arg + (len - 4), ".hpp") != 0) + && (len <= 3 || strcmp (arg + (len - 3), ".hp") != 0) + && (len <= 4 || strcmp (arg + (len - 4), ".hxx") != 0) + && (len <= 4 || strcmp (arg + (len - 4), ".h++") != 0) + && (len <= 4 || strcmp (arg + (len - 4), ".HPP") != 0) + && (len <= 4 || strcmp (arg + (len - 4), ".tcc") != 0) + && (len <= 3 || strcmp (arg + (len - 3), ".hh") != 0)) + library = 1; + } + } + break; + } + } + + /* There's no point adding -shared-libgcc if we don't have a shared + libgcc. */ +#ifndef ENABLE_SHARED_LIBGCC + shared_libgcc = 0; +#endif + + /* Add one for shared_libgcc or extra static library. */ + num_args = argc + added + need_math + (library > 0) * 4 + 1; + new_decoded_options = XNEWVEC (struct cl_decoded_option, num_args); + + i = 0; + j = 0; + + /* Copy the 0th argument, i.e., the name of the program itself. */ + new_decoded_options[j++] = decoded_options[i++]; + + /* NOTE: We start at 1 now, not 0. */ + while (i < argc) + { + new_decoded_options[j] = decoded_options[i]; + + /* Make sure -lstdc++ is before the math library, since libstdc++ + itself uses those math routines. */ + if (!saw_math && (args[i] & MATHLIB) && library > 0) + { + --j; + saw_math = &decoded_options[i]; + } + + if (!saw_time && (args[i] & TIMELIB) && library > 0) + { + --j; + saw_time = &decoded_options[i]; + } + + if (!saw_libc && (args[i] & WITHLIBC) && library > 0) + { + --j; + saw_libc = &decoded_options[i]; + } + + /* Wrap foo.[chi] files in a language specification to + force the gcc compiler driver to run cc1plus on them. */ + if (args[i] & LANGSPEC) + { + const char *arg = decoded_options[i].arg; + int len = strlen (arg); + switch (arg[len - 1]) + { + case 'c': + generate_option (OPT_x, "c++", 1, CL_DRIVER, + &new_decoded_options[j++]); + break; + case 'i': + generate_option (OPT_x, "c++-cpp-output", 1, CL_DRIVER, + &new_decoded_options[j++]); + break; + case 'h': + generate_option (OPT_x, "c++-header", 1, CL_DRIVER, + &new_decoded_options[j++]); + break; + default: + gcc_unreachable (); + } + new_decoded_options[j++] = decoded_options[i]; + generate_option (OPT_x, "none", 1, CL_DRIVER, + &new_decoded_options[j]); + } + + if ((args[i] & SKIPOPT) != 0) + --j; + + i++; + j++; + } + + /* Add `-lstdc++' if we haven't already done so. */ + if (library > 0) + { +#ifdef HAVE_LD_STATIC_DYNAMIC + if (library > 1 && !static_link) + { + generate_option (OPT_Wl_, LD_STATIC_OPTION, 1, CL_DRIVER, + &new_decoded_options[j]); + j++; + } +#endif + generate_option (OPT_l, + saw_profile_flag ? LIBSTDCXX_PROFILE : LIBSTDCXX, 1, + CL_DRIVER, &new_decoded_options[j]); + added_libraries++; + j++; + /* Add target-dependent static library, if necessary. */ + if ((static_link || library > 1) && LIBSTDCXX_STATIC != NULL) + { + generate_option (OPT_l, LIBSTDCXX_STATIC, 1, + CL_DRIVER, &new_decoded_options[j]); + added_libraries++; + j++; + } +#ifdef HAVE_LD_STATIC_DYNAMIC + if (library > 1 && !static_link) + { + generate_option (OPT_Wl_, LD_DYNAMIC_OPTION, 1, CL_DRIVER, + &new_decoded_options[j]); + j++; + } +#endif + } + if (saw_math) + new_decoded_options[j++] = *saw_math; + else if (library > 0 && need_math) + { + generate_option (OPT_l, + saw_profile_flag ? MATH_LIBRARY_PROFILE : MATH_LIBRARY, + 1, CL_DRIVER, &new_decoded_options[j]); + added_libraries++; + j++; + } + if (saw_time) + new_decoded_options[j++] = *saw_time; + else if (library > 0 && need_time) + { + generate_option (OPT_l, TIME_LIBRARY, 1, CL_DRIVER, + &new_decoded_options[j]); + added_libraries++; + j++; + } + if (saw_libc) + new_decoded_options[j++] = *saw_libc; + if (shared_libgcc && !static_link) + generate_option (OPT_shared_libgcc, NULL, 1, CL_DRIVER, + &new_decoded_options[j++]); + + *in_decoded_options_count = j; + *in_decoded_options = new_decoded_options; + *in_added_libraries = added_libraries; +} + +/* Called before linking. Returns 0 on success and -1 on failure. */ +int lang_specific_pre_link (void) /* Not used for C++. */ +{ + return 0; +} + +/* Number of extra output files that lang_specific_pre_link may generate. */ +int lang_specific_extra_outfiles = 0; /* Not used for C++. */ |