X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=gold%2Fconfigure.ac;h=d7fa1f88e8bdae617f04eeee76dd6f1ad9ec8d84;hb=73b9be8b5301c4ac056e10c38a47414867ee892a;hp=5e3dc0601c04074213ce82180f2c1c42211a8d0e;hpb=81c82a68dc3bb09bd3b5b4101ed9737814023f1a;p=deliverable%2Fbinutils-gdb.git diff --git a/gold/configure.ac b/gold/configure.ac index 5e3dc0601c..d7fa1f88e8 100644 --- a/gold/configure.ac +++ b/gold/configure.ac @@ -1,4 +1,21 @@ dnl Process this file with autoconf to produce a configure script. +dnl +dnl Copyright (C) 2006-2017 Free Software Foundation, Inc. +dnl +dnl This file is free software; you can redistribute it and/or modify +dnl it under the terms of the GNU General Public License as published by +dnl the Free Software Foundation; either version 3 of the License, or +dnl (at your option) any later version. +dnl +dnl This program is distributed in the hope that it will be useful, +dnl but WITHOUT ANY WARRANTY; without even the implied warranty of +dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +dnl GNU General Public License for more details. +dnl +dnl You should have received a copy of the GNU General Public License +dnl along with this program; see the file COPYING3. If not see +dnl . +dnl AC_PREREQ(2.59) @@ -15,7 +32,7 @@ AM_CONFIG_HEADER(config.h:config.in) AH_VERBATIM([00_CONFIG_H_CHECK], [/* Check that config.h is #included before system headers (this works only for glibc, but that should be enough). */ -#if defined(__GLIBC__) && !defined(__CONFIG_H__) +#if defined(__GLIBC__) && !defined(__FreeBSD_kernel__) && !defined(__CONFIG_H__) # error config.h must be #included before system headers #endif #define __CONFIG_H__ 1]) @@ -32,7 +49,7 @@ fi sysroot_relocatable=0 if test -n "$sysroot"; then - case "sysroot" in + case "$sysroot" in "${prefix}" | "${prefix}/"* | \ "${exec_prefix}" | "${exec_prefix}/"* | \ '${prefix}' | '${prefix}/'*| \ @@ -51,32 +68,20 @@ dnl "install_as_default" is true if the linker to be installed as the dnl default linker, ld. dnl "installed_linker" is the installed gold linker name. -default_ld= -AC_ARG_ENABLE(ld, -[[ --enable-ld[=ARG] build ld [ARG={default,yes,no}]]], -[case "${enableval}" in - default) - default_ld=ld.bfd - ;; -esac]) - +installed_linker=ld.gold AC_ARG_ENABLE(gold, [[ --enable-gold[=ARG] build gold [ARG={default,yes,no}]]], [case "${enableval}" in - yes|default) - if test x${default_ld} = x; then + default) + install_as_default=yes + ;; + yes) + if test x${enable_ld} = xno; then install_as_default=yes fi - installed_linker=ld.gold - ;; - no) - ;; - *) - AC_MSG_ERROR([invalid --enable-gold argument]) ;; esac], -[install_as_default=no - installed_linker=ld.gold]) +[install_as_default=no]) AC_SUBST(install_as_default) AC_SUBST(installed_linker) @@ -109,6 +114,23 @@ if test "$plugins" = "yes"; then fi AM_CONDITIONAL(PLUGINS, test "$plugins" = "yes") +# Decide if -z relro should be enabled in ELF linker by default. +ac_default_ld_z_relro=unset +# Provide a configure time option to override our default. +AC_ARG_ENABLE(relro, + AS_HELP_STRING([--enable-relro], + [enable -z relro in ELF linker by default]), +[case "${enableval}" in + yes) ac_default_ld_z_relro=1 ;; + no) ac_default_ld_z_relro=0 ;; +esac])dnl +if test "${ac_default_ld_z_relro}" = unset; then + ac_default_ld_z_relro=1 +fi +AC_DEFINE_UNQUOTED(DEFAULT_LD_Z_RELRO, + $ac_default_ld_z_relro, + [Define to 1 if you want to enable -z relro in ELF linker by default.]) + AC_ARG_ENABLE([targets], [ --enable-targets alternative target configurations], [case "${enableval}" in @@ -139,6 +161,26 @@ if test -n "$enable_targets"; then done fi +# Decide which "--hash-style" to use by default +# Provide a configure time option to override our default. +AC_ARG_ENABLE([default-hash-style], +AS_HELP_STRING([--enable-default-hash-style={sysv,gnu,both}], + [use this default hash style]), +[case "${enable_default_hash_style}" in + sysv | gnu | both) ;; + *) AC_MSG_ERROR([bad value ${enable_default_hash_style} for enable-default-hash-style option]) ;; +esac], +[case "${target}" in + # Enable gnu hash only on GNU targets, but not mips + mips*-*-*) enable_default_hash_style=sysv ;; + *-*-gnu* | *-*-linux* | *-*-nacl*) enable_default_hash_style=both ;; + *) enable_default_hash_style=sysv ;; +esac]) + +AC_DEFINE_UNQUOTED([DEFAULT_HASH_STYLE], + ["${enable_default_hash_style}"], + [Set the default --hash-style value]) + # See which specific instantiations we need. targetobjs= all_targets= @@ -194,11 +236,33 @@ for targ in $target $canon_targets; do default_big_endian=$targ_big_endian default_osabi=$targ_osabi + AM_CONDITIONAL(DEFAULT_TARGET_AARCH64, test "$targ_obj" = "aarch64") AM_CONDITIONAL(DEFAULT_TARGET_ARM, test "$targ_obj" = "arm") AM_CONDITIONAL(DEFAULT_TARGET_I386, test "$targ_obj" = "i386") AM_CONDITIONAL(DEFAULT_TARGET_POWERPC, test "$targ_obj" = "powerpc") AM_CONDITIONAL(DEFAULT_TARGET_SPARC, test "$targ_obj" = "sparc") - AM_CONDITIONAL(DEFAULT_TARGET_X86_64, test "$targ_obj" = "x86_64") + AM_CONDITIONAL(DEFAULT_TARGET_S390, test "$targ_obj" = "s390") + target_x86_64=no + target_x32=no + if test "$targ_obj" = "x86_64"; then + case "$target" in + x86_64*-linux-gnux32) + target_x32=yes + default_size=32 + ;; + *) + target_x86_64=yes + ;; + esac + fi + AM_CONDITIONAL(DEFAULT_TARGET_X86_64, test "$target_x86_64" = "yes") + AM_CONDITIONAL(DEFAULT_TARGET_X32, test "$target_x32" = "yes") + AM_CONDITIONAL(DEFAULT_TARGET_X86_64_OR_X32, + test "$target_x86_64" = "yes" -o "$target_x32" = "yes") + AM_CONDITIONAL(DEFAULT_TARGET_TILEGX, test "$targ_obj" = "tilegx") + AM_CONDITIONAL(DEFAULT_TARGET_MIPS, test "$targ_obj" = "mips") + DEFAULT_TARGET=${targ_obj} + AC_SUBST(DEFAULT_TARGET) fi fi fi @@ -304,9 +368,10 @@ dnl tell the unittest framework if we're compiling for one of those dnl targets, so it doesn't try to run the tests that do that. AM_CONDITIONAL(FN_PTRS_IN_SO_WITHOUT_PIC, [ case $target_cpu in - i?86) true;; + powerpc*) false;; x86_64) false;; sparc64) false;; + s390x) false;; *) true;; esac]) @@ -329,6 +394,19 @@ dnl Whether we can test -mcmodel=medium. AM_CONDITIONAL(MCMODEL_MEDIUM, [test "$target_cpu" = "x86_64" -a "$have_mcmodel_medium" = "yes" -a "$gold_cv_prog_gcc41" = "yes"]) +AC_CACHE_CHECK([whether $CC supports -fmerge-constants], + [gold_cv_merge_constants], [ +save_CFLAGS="$CFLAGS" +CFLAGS="$CFLAGS -fmerge-constants" +AC_COMPILE_IFELSE([const char *s = "foo";], + [gold_cv_merge_constants=yes], + [gold_cv_merge_constants=no]) +CFLAGS="$save_CFLAGS"]) +AC_SUBST([MERGE_CONSTANTS_FLAG]) +AS_IF([test "$gold_cv_merge_constants" = yes], + [MERGE_CONSTANTS_FLAG=-fmerge-constants], + [MERGE_CONSTANTS_FLAG=]) + dnl Test for __thread support. AC_CACHE_CHECK([for thread support], [gold_cv_c_thread], [AC_COMPILE_IFELSE([__thread int i = 1;], @@ -367,8 +445,13 @@ fi AM_CONDITIONAL(OMP_SUPPORT, test "$gold_cv_c_threadprivate" = "yes") dnl Test for the -ftls-dialect=gnu2 option. +dnl Use -Werror in case of compilers that make unknown -m options warnings. +dnl They would pass the test here, but fail in actual use when $WARN_CFLAGS +dnl gets set later by default Autoconf magic to include -Werror. (We are +dnl assuming here that there is no compiler that groks -mtls-dialect=gnu2 +dnl but does not grok -Werror.) save_CFLAGS="$CFLAGS" -CFLAGS="$CFLAGS -fpic -mtls-dialect=gnu2" +CFLAGS="$CFLAGS -Werror -fpic -mtls-dialect=gnu2" AC_COMPILE_IFELSE([ __thread int i; void foo (void) @@ -485,8 +568,7 @@ else fi # Link in zlib if we can. This allows us to write compressed sections. -AC_SEARCH_LIBS(zlibVersion, z, [AC_CHECK_HEADERS(zlib.h)]) -AM_CONDITIONAL(HAVE_ZLIB, test "$ac_cv_search_zlibVersion" != "no") +AM_ZLIB dnl We have to check these in C, not C++, because autoconf generates dnl tests which have no type information, and current glibc provides @@ -494,11 +576,43 @@ dnl multiple declarations of functions like basename when compiling dnl with C++. AC_CHECK_DECLS([basename, ffs, asprintf, vasprintf, snprintf, vsnprintf, strverscmp]) +dnl Check if gcc supports the -gpubnames option. +dnl Use -Werror in case of compilers that make unknown -g options warnings. +dnl They would pass the test here, but fail in actual use when $WARN_CFLAGS +dnl gets set later by default Autoconf magic to include -Werror. (We are +dnl assuming here that there is no compiler that groks -gpubnames +dnl but does not grok -Werror.) +save_CFLAGS="$CFLAGS" +CFLAGS="$CFLAGS -Werror -gpubnames" +AC_COMPILE_IFELSE([int i;], [have_pubnames=yes], [have_pubnames=no]) +CFLAGS="$save_CFLAGS" +AM_CONDITIONAL(HAVE_PUBNAMES, test "$have_pubnames" = "yes") + +dnl Check if gcc supports the -fno-use-linker-plugin option. +save_CFLAGS="$CFLAGS" +CFLAGS="$CFLAGS -Werror -fno-use-linker-plugin" +AC_COMPILE_IFELSE([int i;], [have_no_use_linker_plugin=yes], [have_no_use_linker_plugin=no]) +CFLAGS="$save_CFLAGS" +AM_CONDITIONAL(HAVE_NO_USE_LINKER_PLUGIN, test "$have_no_use_linker_plugin" = "yes") + AC_LANG_PUSH(C++) +AC_CHECK_HEADERS(unordered_set unordered_map) AC_CHECK_HEADERS(tr1/unordered_set tr1/unordered_map) AC_CHECK_HEADERS(ext/hash_map ext/hash_set) AC_CHECK_HEADERS(byteswap.h) + +dnl When plugins enabled dynamic loader interface is required. Check headers +dnl which may provide this interface. Add the necessary library to link. +AC_CHECK_HEADERS(windows.h) +AC_CHECK_HEADERS(dlfcn.h) +AC_SEARCH_LIBS(dlopen, [dl dld]) +case "$ac_cv_search_dlopen" in + no*) DLOPEN_LIBS="";; + *) DLOPEN_LIBS="$ac_cv_search_dlopen";; +esac +AC_SUBST(DLOPEN_LIBS) + AC_CHECK_FUNCS(mallinfo posix_fallocate fallocate readv sysconf times) AC_CHECK_DECLS([basename, ffs, asprintf, vasprintf, snprintf, vsnprintf, strverscmp, strndup, memmem]) @@ -528,7 +642,7 @@ std::tr1::hash h; ], [gold_cv_hash_off_t=yes], [gold_cv_hash_off_t=no]) -CXXFLAGS=$CFLAGS_hold]) +CXXFLAGS=$CXXFLAGS_hold]) if test "$gold_cv_hash_off_t" = "yes"; then AC_DEFINE(HAVE_TR1_HASH_OFF_T, 1, [Define if std::tr1::hash is usable])