dnl Process this file with autoconf to produce a configure script.
-
-AC_PREREQ(2.59)
+dnl
+dnl Copyright (C) 2006-2020 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 <http://www.gnu.org/licenses/>.
+dnl
AC_INIT(gold, 0.1)
AC_CONFIG_SRCDIR(gold.cc)
AC_CANONICAL_TARGET
-AM_INIT_AUTOMAKE
+AM_INIT_AUTOMAKE([no-dist parallel-tests])
AM_CONFIG_HEADER(config.h:config.in)
+AC_USE_SYSTEM_EXTENSIONS
+
+# PR 14072
+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(__FreeBSD_kernel__) && !defined(__CONFIG_H__)
+# error config.h must be #included before system headers
+#endif
+#define __CONFIG_H__ 1])
+
AC_ARG_WITH(sysroot,
[ --with-sysroot[=DIR] search for usr/lib et al within DIR],
[sysroot=$withval], [sysroot=no])
sysroot_relocatable=0
if test -n "$sysroot"; then
- case "sysroot" in
+ case "$sysroot" in
"${prefix}" | "${prefix}/"* | \
"${exec_prefix}" | "${exec_prefix}/"* | \
'${prefix}' | '${prefix}/'*| \
AC_DEFINE_UNQUOTED(TARGET_SYSTEM_ROOT_RELOCATABLE, $sysroot_relocatable,
[Whether the system root can be relocated])
-dnl For now threads are a configure time option.
-AC_ARG_ENABLE([threads],
-[ --enable-threads multi-threaded linking],
+dnl "install_as_default" is true if the linker to be installed as the
+dnl default linker, ld.
+dnl "installed_linker" is the installed gold linker name.
+
+installed_linker=ld.gold
+AC_ARG_ENABLE(gold,
+[[ --enable-gold[=ARG] build gold [ARG={default,yes,no}]]],
[case "${enableval}" in
- yes | "") threads=yes ;;
- no) threads=no ;;
- *) threads=yes ;;
+ default)
+ install_as_default=yes
+ ;;
+ yes)
+ if test x${enable_ld} = xno; then
+ install_as_default=yes
+ fi
+ ;;
esac],
-[threads=no])
-if test "$threads" = "yes"; then
- AC_DEFINE(ENABLE_THREADS, 1,
- [Define to do multi-threaded linking])
+[install_as_default=no])
+AC_SUBST(install_as_default)
+AC_SUBST(installed_linker)
+
+AC_PLUGINS
+if test "$plugins" = "yes"; then
+ AC_DEFINE(ENABLE_PLUGINS, 1,
+ [Define to enable linker plugins])
fi
-AM_CONDITIONAL(THREADS, test "$threads" = "yes")
+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,
+ $ac_default_ld_z_relro,
+ [Define to 1 if you want to enable -z relro in ELF linker by default.])
AC_ARG_ENABLE([targets],
[ --enable-targets alternative target configurations],
done
fi
+# Decide which "--hash-style" to use by default
+# Provide a configure time option to override our default.
+AC_ARG_ENABLE([default-hash-style],
+AS_HELP_STRING([--enable-default-hash-style={sysv,gnu,both}],
+ [use this default hash style]),
+[case "${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=
+default_machine=
+default_size=
+default_big_endian=
+default_osabi=ELFOSABI_NONE
+targ_32_little=
+targ_32_big=
+targ_64_little=
+targ_64_big=
for targ in $target $canon_targets; do
- targ_32_little=
- targ_32_big=
- targ_64_little=
- targ_64_big=
if test "$targ" = "all"; then
targ_32_little=yes
targ_32_big=yes
targ_64_big=yes
all_targets=yes
else
- case "$targ" in
- i?86-*)
- targ_32_little=yes
- targetobjs="$targetobjs i386.\$(OBJEXT)"
- ;;
- x86_64-*)
- targ_64_little=yes
- targetobjs="$targetobjs x86_64.\$(OBJEXT)"
- ;;
- *)
+ . ${srcdir}/configure.tgt
+
+ if test "$targ_obj" = "UNKNOWN"; then
AC_MSG_ERROR("unsupported target $targ")
- ;;
- esac
+ else
+ targetobjs="$targetobjs ${targ_obj}.\$(OBJEXT)"
+ if test "$targ_extra_obj" != ""; then
+ targetobjs="$targetobjs ${targ_extra_obj}.\$(OBJEXT)"
+ fi
+ if test "$targ_size" = "32" -o "$targ_extra_size" = "32"; then
+ if test "$targ_big_endian" = "true" \
+ -o "$targ_extra_big_endian" = "true"; then
+ targ_32_big=yes
+ fi
+ if test "$targ_big_endian" = "false" \
+ -o "$targ_extra_big_endian" = "false"; then
+ targ_32_little=yes
+ fi
+ fi
+ if test "$targ_size" = "64" -o "$targ_extra_size" = "64"; then
+ if test "$targ_big_endian" = "true" \
+ -o "$targ_extra_big_endian" = "true"; then
+ targ_64_big=yes
+ fi
+ if test "$targ_big_endian" = "false" \
+ -o "$targ_extra_big_endian" = "false"; then
+ targ_64_little=yes
+ fi
+ fi
+
+ if test "$target" = "$targ"; then
+ default_machine=$targ_machine
+ default_size=$targ_size
+ default_big_endian=$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_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
done
+# Remove any duplicates.
+to=""
+for t in $targetobjs; do
+ case " $to " in
+ *" $t "*) ;;
+ *) to="$to $t" ;;
+ esac
+done
+targetobjs=$to
+
if test -n "$targ_32_little"; then
AC_DEFINE(HAVE_TARGET_32_LITTLE, 1,
[Define to support 32-bit little-endian targets])
fi
AC_SUBST(TARGETOBJS)
+AC_DEFINE_UNQUOTED(GOLD_DEFAULT_MACHINE, $default_machine,
+ [Default machine code])
+AC_DEFINE_UNQUOTED(GOLD_DEFAULT_SIZE, $default_size,
+ [Default size (32 or 64)])
+AC_DEFINE_UNQUOTED(GOLD_DEFAULT_BIG_ENDIAN, $default_big_endian,
+ [Default big endian (true or false)])
+AC_DEFINE_UNQUOTED(GOLD_DEFAULT_OSABI, $default_osabi,
+ [Default OSABI code])
+
+AC_ARG_WITH(lib-path,
+[ --with-lib-path=dir1:dir2... set default LIB_PATH],
+[case "$withval" in
+ yes) LIB_PATH='"/lib:/usr/lib"' ;;
+ no) LIB_PATH='""' ;;
+ *) LIB_PATH='"'"$withval"'"' ;;
+ esac],
+[LIB_PATH='"::DEFAULT::"'])
+AC_DEFINE_UNQUOTED(LIB_PATH, $LIB_PATH,
+ [Default library search path])
+if test "x$target_alias" = "x" -o "x$host_alias" = "x$target_alias"; then
+ AC_DEFINE(NATIVE_LINKER, 1, [Whether configured as a native linker])
+fi
+
+AC_CHECK_TOOL(NM, nm)
+
AC_PROG_CC
AC_PROG_CXX
AC_PROG_YACC
test "x$target_alias" = "x" -o "x$host_alias" = "x$target_alias")
AM_CONDITIONAL(GCC, test "$GCC" = yes)
+AM_CONDITIONAL(NATIVE_OR_CROSS_LINKER,
+ test "x$target_alias" = "x" -o "x$host_alias" = "x$target_alias" -o "x$host_alias" = "x$build_alias")
+
+dnl Test for whether static linking is supported. Some systems do not
+dnl install static libraries. This only affects the set of tests that
+dnl we run.
+AC_CACHE_CHECK([whether static linking works], [gold_cv_lib_static],
+[LDFLAGS_hold=$LDFLAGS
+LDFLAGS="$LDFLAGS -static"
+AC_LINK_IFELSE([
+AC_LANG_PROGRAM([[void f() { }]])],
+[gold_cv_lib_static=yes], [gold_cv_lib_static=no])
+LDFLAGS=$LDFLAGS_hold])
+AM_CONDITIONAL(HAVE_STATIC, test "$gold_cv_lib_static" = "yes")
+
dnl Some architectures do not support taking pointers of functions
dnl defined in shared libraries except in -fPIC mode. We need to
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 $target_cpu in
- i?86) true;;
+ powerpc*) false;;
x86_64) false;;
+ sparc64) false;;
+ s390x) false;;
*) true;;
esac])
+dnl Test for gcc 4.1 or later. Full support for -mcmodel=medium is
+dnl only available in gcc 4.1.
+AC_CACHE_CHECK([for gcc >= 4.1], [gold_cv_prog_gcc41],
+[AC_COMPILE_IFELSE([AC_LANG_SOURCE([
+#if !defined __GNUC__
+error
+#elif __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 1)
+error
+#endif
+])], [gold_cv_prog_gcc41=yes], [gold_cv_prog_gcc41=no])])
+
+save_CFLAGS="$CFLAGS"
+CFLAGS="$CFLAGS -mcmodel=medium"
+AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])], [have_mcmodel_medium=yes], [have_mcmodel_medium=no])
+CFLAGS="$save_CFLAGS"
+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="$CFLAGS -fmerge-constants"
+AC_COMPILE_IFELSE([AC_LANG_SOURCE([const char *s = "foo";])],
+ [gold_cv_merge_constants=yes],
+ [gold_cv_merge_constants=no])
+CFLAGS="$save_CFLAGS"])
+AC_SUBST([MERGE_CONSTANTS_FLAG])
+AS_IF([test "$gold_cv_merge_constants" = yes],
+ [MERGE_CONSTANTS_FLAG=-fmerge-constants],
+ [MERGE_CONSTANTS_FLAG=])
+
dnl Test for __thread support.
AC_CACHE_CHECK([for thread support], [gold_cv_c_thread],
-[AC_COMPILE_IFELSE([__thread int i = 1;],
+[AC_COMPILE_IFELSE([AC_LANG_SOURCE([__thread int i = 1;])],
[gold_cv_c_thread=yes], [gold_cv_c_thread=no])])
AM_CONDITIONAL(TLS, test "$gold_cv_c_thread" = "yes")
dnl On GNU/Linux TLS in static programs only works when using glibc
dnl 2.4 or later.
AC_CACHE_CHECK([for glibc >= 2.4], [gold_cv_lib_glibc24],
-[AC_COMPILE_IFELSE([
+[AC_COMPILE_IFELSE([AC_LANG_SOURCE([
#include <features.h>
#if !defined __GLIBC__
error
#elif __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 4)
error
#endif
-], [gold_cv_lib_glibc24=yes], [gold_cv_lib_glibc24=no])])
+])], [gold_cv_lib_glibc24=yes], [gold_cv_lib_glibc24=no])])
AM_CONDITIONAL(STATIC_TLS, test "$gold_cv_lib_glibc24" = "yes")
+dnl Test for #pragma omp threadprivate
+AC_CACHE_CHECK([for omp support], [gold_cv_c_threadprivate],
+[save_CFLAGS="$CFLAGS"
+CFLAGS="$CFLAGS -fopenmp"
+AC_COMPILE_IFELSE([AC_LANG_SOURCE([
+#include <omp.h>
+int i;
+#pragma omp threadprivate (i)
+])], [gold_cv_c_threadprivate=yes], [gold_cv_c_threadprivate=no])
+CFLAGS="$save_CFLAGS"])
+if test "$gold_cv_c_threadprivate" = "yes"; then
+ AC_DEFINE(HAVE_OMP_SUPPORT, 1,
+ [Define if compiler supports #pragma omp threadprivate])
+fi
+AM_CONDITIONAL(OMP_SUPPORT, test "$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="$CFLAGS -Werror -fpic -mtls-dialect=gnu2"
+AC_COMPILE_IFELSE([AC_LANG_SOURCE([
+__thread int i;
+void foo (void)
+{
+ i = 10;
+}
+])], [have_tls_gnu2=yes], [have_tls_gnu2=no])
+CFLAGS="$save_CFLAGS"
+AM_CONDITIONAL(TLS_GNU2_DIALECT, test "$have_tls_gnu2" = "yes")
+
+dnl On GNU/Linux TLS descriptors are supported by the dynamic loader
+dnl only with glibc 2.9 or later.
+AC_CACHE_CHECK([for glibc >= 2.9], [gold_cv_lib_glibc29],
+[AC_COMPILE_IFELSE([AC_LANG_SOURCE([
+#include <features.h>
+#if !defined __GLIBC__
+error
+#elif __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 9)
+error
+#endif
+])], [gold_cv_lib_glibc29=yes], [gold_cv_lib_glibc29=no])])
+
+AM_CONDITIONAL(TLS_DESCRIPTORS, test "$gold_cv_lib_glibc29" = "yes")
+
+dnl Test for the -frandom-seed option.
+AC_CACHE_CHECK([for -frandom-seed support], [gold_cv_c_random_seed],
+[save_CFLAGS="$CFLAGS"
+CFLAGS="$CFLAGS -frandom-seed=foo"
+AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])], [gold_cv_c_random_seed=yes],
+[gold_cv_c_random_seed=no])
+CFLAGS="$save_CFLAGS"])
+if test "$gold_cv_c_random_seed" = "yes"; then
+ # In Makefile, '$@' will be expanded to be the name of the file
+ # being built, providing a unique seed for each file.
+ RANDOM_SEED_CFLAGS=-frandom-seed=\$@
+fi
+AC_SUBST(RANDOM_SEED_CFLAGS)
+
+dnl On GNU/Linux ifunc is supported by the dynamic linker in glibc
+dnl 2.11 or later, and by binutils 2.20.1 or later.
+AC_CACHE_CHECK([for glibc ifunc support], [gold_cv_lib_glibc_ifunc],
+[save_LDFLAGS="$LDFLAGS"
+LDFLAGS="$LDFLAGS -static"
+AC_LINK_IFELSE([AC_LANG_PROGRAM([[
+#include <features.h>
+#if !defined __GLIBC__
+error
+#elif __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 11)
+error
+#endif
+void func (void) { }
+void invoke (void);
+__asm__(".type invoke, %gnu_indirect_function");
+typedef void (*funcptr) (void);
+funcptr dispatch (void) __asm__ ("invoke");
+funcptr dispatch (void) { return &func; }]],
+[[invoke();]])
+], [
+if ${NM} conftest$EXEEXT | grep "__rela\?_iplt_start" >/dev/null 2>&1; then
+ gold_cv_lib_glibc_ifunc=both
+else
+ gold_cv_lib_glibc_ifunc=dyn
+fi], [gold_cv_lib_glibc_ifunc=no])
+LDFLAGS="$save_LDFLAGS"])
+
+AM_CONDITIONAL(IFUNC, test "$gold_cv_lib_glibc_ifunc" != "no")
+AM_CONDITIONAL(IFUNC_STATIC, test "$gold_cv_lib_glibc_ifunc" = "both")
+
AM_BINUTILS_WARNINGS
-WARN_CXXFLAGS=`echo ${WARN_CFLAGS} | sed -e 's/-Wstrict-prototypes//' -e 's/-Wmissing-prototypes//'`
+WARN_CXXFLAGS=`echo ${WARN_CFLAGS} | sed -e 's/-Wstrict-prototypes//' -e 's/-Wmissing-prototypes//' -e 's/-Wshadow//'`
AC_SUBST(WARN_CXXFLAGS)
+AC_ARG_WITH(gold-ldflags,
+[ --with-gold-ldflags=FLAGS additional link flags for gold],
+[if test "$withval" = "no" -o "$withval" = "yes"; then
+ GOLD_LDFLAGS=
+ else
+ GOLD_LDFLAGS=$withval
+ fi],
+[GOLD_LDFLAGS=])
+AC_SUBST(GOLD_LDFLAGS)
+
+AC_ARG_WITH(gold-ldadd,
+[ --with-gold-ldadd=LIBS additional libraries for gold],
+[if test "$withval" = "no" -o "$withval" = "yes"; then
+ GOLD_LDADD=
+ else
+ GOLD_LDADD=$withval
+ fi],
+[GOLD_LDADD=])
+AC_SUBST(GOLD_LDADD)
+
dnl Force support for large files by default. This may need to be
dnl host dependent. If build == host, we can check getconf LFS_CFLAGS.
-LFS_CXXFLAGS="-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
-AC_SUBST(LFS_CXXFLAGS)
-
-AC_REPLACE_FUNCS(pread)
+LFS_CFLAGS="-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
+AC_SUBST(LFS_CFLAGS)
+
+AC_CHECK_HEADERS(sys/mman.h)
+AC_CHECK_FUNCS(chsize mmap link)
+AC_REPLACE_FUNCS(pread ftruncate ffsll)
+
+AC_CACHE_CHECK([mremap with MREMAP_MAYMOVE], [gold_cv_lib_mremap_maymove],
+[AC_LINK_IFELSE([
+AC_LANG_PROGRAM([[
+#include <sys/mman.h>
+void f() { mremap (0, 0, 0, MREMAP_MAYMOVE); }
+]])], [gold_cv_lib_mremap_maymove=yes], [gold_cv_lib_mremap_maymove=no])])
+if test "$gold_cv_lib_mremap_maymove" = "yes"; then
+ AC_DEFINE(HAVE_MREMAP, 1,
+ [Define to 1 if you have the mremap function with MREMAP_MAYMOVE support])
+else
+ AC_LIBOBJ(mremap)
+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_ZLIB
+
+AC_ARG_ENABLE([threads],
+[[ --enable-threads[=ARG] multi-threaded linking [ARG={auto,yes,no}]]],
+[case "${enableval}" in
+ yes | "") threads=yes ;;
+ no) threads=no ;;
+ auto) threads=auto ;;
+ *) threads=yes ;;
+ esac],
+[threads=auto])
+
+if test "$threads" = "yes"; then
+ AX_PTHREAD([threads=yes], AC_MSG_ERROR([pthread not found]))
+elif test "$threads" = "auto"; then
+ AX_PTHREAD([threads=yes], [threads=no])
+fi
+
+if test "$threads" = "yes"; then
+ AC_DEFINE(ENABLE_THREADS, 1,
+ [Define to do multi-threaded linking])
+fi
+AM_CONDITIONAL(THREADS, test "$threads" = "yes")
+
+dnl We have to check these in C, not C++, because autoconf generates
+dnl tests which have no type information, and current glibc provides
+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="$CFLAGS -Werror -gpubnames"
+AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])], [have_pubnames=yes], [have_pubnames=no])
+CFLAGS="$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="$CFLAGS -Werror -fno-use-linker-plugin"
+AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])], [have_no_use_linker_plugin=yes], [have_no_use_linker_plugin=no])
+CFLAGS="$save_CFLAGS"
+AM_CONDITIONAL(HAVE_NO_USE_LINKER_PLUGIN, test "$have_no_use_linker_plugin" = "yes")
AC_LANG_PUSH(C++)
+AC_CHECK_HEADERS(unordered_set unordered_map)
AC_CHECK_HEADERS(tr1/unordered_set tr1/unordered_map)
AC_CHECK_HEADERS(ext/hash_map ext/hash_set)
-AC_CHECK_FUNCS(mallinfo)
+AC_CHECK_HEADERS(byteswap.h)
+
+dnl When plugins enabled dynamic loader interface is required. Check headers
+dnl which may provide this interface. Add the necessary library to link.
+AC_CHECK_HEADERS(windows.h)
+AC_CHECK_HEADERS(dlfcn.h)
+AC_SEARCH_LIBS(dlopen, [dl dld])
+case "$ac_cv_search_dlopen" in
+ no*) DLOPEN_LIBS="";;
+ *) DLOPEN_LIBS="$ac_cv_search_dlopen";;
+esac
+AC_SUBST(DLOPEN_LIBS)
+
+AC_CHECK_FUNCS(mallinfo posix_fallocate fallocate readv sysconf times mkdtemp)
+AC_CHECK_DECLS([basename, ffs, asprintf, vasprintf, snprintf, vsnprintf, strverscmp, strndup, memmem])
+
+# Use of ::std::tr1::unordered_map::rehash causes undefined symbols
+# at link time with some versions of GCC.
+AC_CACHE_CHECK([whether ::std::tr1::unordered_map::rehash is usable.],
+[gold_cv_unordered_map_rehash],
+[AC_LINK_IFELSE([AC_LANG_PROGRAM([[
+#include <tr1/unordered_map>
+void bar() { ::std::tr1::unordered_map<int, int> x; x.rehash(10); }
+]])], [gold_cv_unordered_map_rehash=yes], [gold_cv_unordered_map_rehash=no])])
+if test "$gold_cv_unordered_map_rehash" = "yes"; then
+ AC_DEFINE(HAVE_TR1_UNORDERED_MAP_REHASH, 1,
+ [Define if ::std::tr1::unordered_map::rehash is usable])
+fi
-dnl Test whether the compiler can specify a member templates to call.
-AC_CACHE_CHECK([template member calls], [gold_cv_c_membertemplates],
-[AC_COMPILE_IFELSE([
-class c { public: template<int i> void fn(); };
-template<int i> void foo(c cv) { cv.fn<i>(); }
-template void foo<1>(c cv);],
-[gold_cv_c_membertemplates=yes], [gold_cv_c_membertemplates=no])])
+# Use of tr1/unordered_map with off_t as a key is not supported on GCC
+# 4.1.xx when compiling in 32-bit mode with a 64-bit off_t type.
+AC_CACHE_CHECK([whether std::tr1::hash<off_t> is defined],
+[gold_cv_hash_off_t],
+[CXXFLAGS_hold=$CXXFLAGS
+CXXFLAGS="$CXXFLAGS $LFS_CFLAGS"
+AC_COMPILE_IFELSE([AC_LANG_SOURCE([
+#include <sys/types.h>
+#include <tr1/unordered_map>
+std::tr1::hash<off_t> h;
+])],
+[gold_cv_hash_off_t=yes],
+[gold_cv_hash_off_t=no])
+CXXFLAGS=$CXXFLAGS_hold])
+if test "$gold_cv_hash_off_t" = "yes"; then
+ AC_DEFINE(HAVE_TR1_HASH_OFF_T, 1,
+ [Define if std::tr1::hash<off_t> is usable])
+fi
+
+# gcc 4.3.0 doesn't recognize the printf attribute on a template
+# function. Check for that. This is gcc bug 35546. This test can
+# probably be removed after the bug has been fixed for a while.
+AC_CACHE_CHECK([whether we can use attributes with template functions],
+[gold_cv_template_attribute],
+[AC_COMPILE_IFELSE([AC_LANG_SOURCE([
+template<typename T> extern void foo(const char*, ...)
+ __attribute__ ((__format__ (__printf__, 1, 2)));
+template<typename T> void foo(const char* format, ...) {}
+void bar() { foo<int>("%s\n", "foo"); }
+])], [gold_cv_template_attribute=yes], [gold_cv_template_attribute=no])])
+if test "$gold_cv_template_attribute" = "yes"; then
+ AC_DEFINE(HAVE_TEMPLATE_ATTRIBUTES, 1,
+ [Define if attributes work on C++ templates])
+fi
-if test "$gold_cv_c_membertemplates" = "yes"; then
- AC_DEFINE(HAVE_MEMBER_TEMPLATE_SPECIFICATIONS, [],
- [Whether the C++ compiler can call a template member with no arguments])
+dnl Check if the system has struct stat::st_mtim.
+AC_CACHE_CHECK([for struct stat::st_mtim.],
+[gold_cv_stat_st_mtim],
+[AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+#include <sys/stat.h>
+long bar() { struct stat s; return (long)(s.st_mtim.tv_sec + s.st_mtim.tv_sec);}
+]])], [gold_cv_stat_st_mtim=yes], [gold_cv_stat_st_mtim=no])])
+if test "$gold_cv_stat_st_mtim" = "yes"; then
+ AC_DEFINE(HAVE_STAT_ST_MTIM, 1,
+ [Define if struct stat has a field st_mtim with timespec for mtime])
fi
AC_LANG_POP(C++)
+AC_CHECK_HEADERS(locale.h)
+AC_CHECK_FUNCS(setlocale)
+AM_LC_MESSAGES
+
AM_MAINTAINER_MODE
AC_OUTPUT(Makefile testsuite/Makefile po/Makefile.in:po/Make-in)
projects / deliverable / binutils-gdb.git / blobdiff