1 dnl Process this file with autoconf to produce a configure script.
3 dnl Copyright 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013
4 dnl Free Software Foundation, Inc.
6 dnl This file is free software; you can redistribute it and/or modify
7 dnl it under the terms of the GNU General Public License as published by
8 dnl the Free Software Foundation; either version 3 of the License, or
9 dnl (at your option) any later version.
11 dnl This program is distributed in the hope that it will be useful,
12 dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
13 dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 dnl GNU General Public License for more details.
16 dnl You should have received a copy of the GNU General Public License
17 dnl along with this program; see the file COPYING3. If not see
18 dnl <http://www.gnu.org/licenses/>.
24 AC_CONFIG_SRCDIR(gold.cc)
28 AM_INIT_AUTOMAKE([no-dist parallel-tests])
30 AM_CONFIG_HEADER(config.h:config.in)
33 AH_VERBATIM([00_CONFIG_H_CHECK],
34 [/* Check that config.h is #included before system headers
35 (this works only for glibc, but that should be enough). */
36 #if defined(__GLIBC__) && !defined(__FreeBSD_kernel__) && !defined(__CONFIG_H__)
37 # error config.h must be #included before system headers
39 #define __CONFIG_H__ 1])
42 [ --with-sysroot[=DIR] search for usr/lib et al within DIR],
43 [sysroot=$withval], [sysroot=no])
45 if test "$sysroot" = "yes"; then
46 sysroot='${exec_prefix}/${target_alias}/sys-root'
47 elif test "$sysroot" = "no"; then
52 if test -n "$sysroot"; then
54 "${prefix}" | "${prefix}/"* | \
55 "${exec_prefix}" | "${exec_prefix}/"* | \
56 '${prefix}' | '${prefix}/'*| \
57 '${exec_prefix}' | '${exec_prefix}/'*)
63 AC_DEFINE_UNQUOTED(TARGET_SYSTEM_ROOT, "$sysroot",
64 [System root for target files])
65 AC_DEFINE_UNQUOTED(TARGET_SYSTEM_ROOT_RELOCATABLE, $sysroot_relocatable,
66 [Whether the system root can be relocated])
68 dnl "install_as_default" is true if the linker to be installed as the
69 dnl default linker, ld.
70 dnl "installed_linker" is the installed gold linker name.
72 installed_linker=ld.gold
74 [[ --enable-gold[=ARG] build gold [ARG={default,yes,no}]]],
75 [case "${enableval}" in
77 install_as_default=yes
80 if test x${enable_ld} = xno; then
81 install_as_default=yes
85 [install_as_default=no])
86 AC_SUBST(install_as_default)
87 AC_SUBST(installed_linker)
89 dnl For now threads are a configure time option.
90 AC_ARG_ENABLE([threads],
91 [ --enable-threads multi-threaded linking],
92 [case "${enableval}" in
93 yes | "") threads=yes ;;
98 if test "$threads" = "yes"; then
99 AC_DEFINE(ENABLE_THREADS, 1,
100 [Define to do multi-threaded linking])
102 AM_CONDITIONAL(THREADS, test "$threads" = "yes")
104 AC_ARG_ENABLE([plugins],
105 [ --enable-plugins linker plugins],
106 [case "${enableval}" in
107 yes | "") plugins=yes ;;
112 if test "$plugins" = "yes"; then
113 AC_DEFINE(ENABLE_PLUGINS, 1,
114 [Define to enable linker plugins])
116 AM_CONDITIONAL(PLUGINS, test "$plugins" = "yes")
118 AC_ARG_ENABLE([targets],
119 [ --enable-targets alternative target configurations],
120 [case "${enableval}" in
122 AC_MSG_ERROR([--enable-targets option must specify target names or 'all'])
128 enable_targets=$enableval
131 [# For now, enable all targets by default
135 # Canonicalize the enabled targets.
136 if test -n "$enable_targets"; then
137 for targ in `echo $enable_targets | sed -e 's/,/ /g'`; do
138 result=`$ac_config_sub $targ 2>/dev/null`
139 if test -n "$result"; then
140 canon_targets="$canon_targets $result"
142 # Permit unrecognized target names, like "all".
143 canon_targets="$canon_targets $targ"
148 # See which specific instantiations we need.
154 default_osabi=ELFOSABI_NONE
159 for targ in $target $canon_targets; do
160 if test "$targ" = "all"; then
167 . ${srcdir}/configure.tgt
169 if test "$targ_obj" = "UNKNOWN"; then
170 AC_MSG_ERROR("unsupported target $targ")
172 targetobjs="$targetobjs ${targ_obj}.\$(OBJEXT)"
173 if test "$targ_extra_obj" != ""; then
174 targetobjs="$targetobjs ${targ_extra_obj}.\$(OBJEXT)"
176 if test "$targ_size" = "32" -o "$targ_extra_size" = "32"; then
177 if test "$targ_big_endian" = "true" \
178 -o "$targ_extra_big_endian" = "true"; then
181 if test "$targ_big_endian" = "false" \
182 -o "$targ_extra_big_endian" = "false"; then
186 if test "$targ_size" = "64" -o "$targ_extra_size" = "64"; then
187 if test "$targ_big_endian" = "true" \
188 -o "$targ_extra_big_endian" = "true"; then
191 if test "$targ_big_endian" = "false" \
192 -o "$targ_extra_big_endian" = "false"; then
197 if test "$target" = "$targ"; then
198 default_machine=$targ_machine
199 default_size=$targ_size
200 default_big_endian=$targ_big_endian
201 default_osabi=$targ_osabi
203 AM_CONDITIONAL(DEFAULT_TARGET_ARM, test "$targ_obj" = "arm")
204 AM_CONDITIONAL(DEFAULT_TARGET_I386, test "$targ_obj" = "i386")
205 AM_CONDITIONAL(DEFAULT_TARGET_POWERPC, test "$targ_obj" = "powerpc")
206 AM_CONDITIONAL(DEFAULT_TARGET_SPARC, test "$targ_obj" = "sparc")
207 AM_CONDITIONAL(DEFAULT_TARGET_X86_64, test "$targ_obj" = "x86_64")
208 AM_CONDITIONAL(DEFAULT_TARGET_TILEGX, test "$targ_obj" = "tilegx")
209 DEFAULT_TARGET=${targ_obj}
210 AC_SUBST(DEFAULT_TARGET)
216 # Remove any duplicates.
218 for t in $targetobjs; do
226 if test -n "$targ_32_little"; then
227 AC_DEFINE(HAVE_TARGET_32_LITTLE, 1,
228 [Define to support 32-bit little-endian targets])
230 if test -n "$targ_32_big"; then
231 AC_DEFINE(HAVE_TARGET_32_BIG, 1,
232 [Define to support 32-bit big-endian targets])
234 if test -n "$targ_64_little"; then
235 AC_DEFINE(HAVE_TARGET_64_LITTLE, 1,
236 [Define to support 64-bit little-endian targets])
238 if test -n "$targ_64_big"; then
239 AC_DEFINE(HAVE_TARGET_64_BIG, 1,
240 [Define to support 64-bit big-endian targets])
243 if test -n "$all_targets"; then
244 TARGETOBJS='$(ALL_TARGETOBJS)'
246 TARGETOBJS="$targetobjs"
250 AC_DEFINE_UNQUOTED(GOLD_DEFAULT_MACHINE, $default_machine,
251 [Default machine code])
252 AC_DEFINE_UNQUOTED(GOLD_DEFAULT_SIZE, $default_size,
253 [Default size (32 or 64)])
254 AC_DEFINE_UNQUOTED(GOLD_DEFAULT_BIG_ENDIAN, $default_big_endian,
255 [Default big endian (true or false)])
256 AC_DEFINE_UNQUOTED(GOLD_DEFAULT_OSABI, $default_osabi,
257 [Default OSABI code])
259 AC_ARG_WITH(lib-path,
260 [ --with-lib-path=dir1:dir2... set default LIB_PATH],
262 yes) LIB_PATH='"/lib:/usr/lib"' ;;
264 *) LIB_PATH='"'"$withval"'"' ;;
266 [LIB_PATH='"::DEFAULT::"'])
267 AC_DEFINE_UNQUOTED(LIB_PATH, $LIB_PATH,
268 [Default library search path])
269 if test "x$target_alias" = "x" -o "x$host_alias" = "x$target_alias"; then
270 AC_DEFINE(NATIVE_LINKER, 1, [Whether configured as a native linker])
273 AC_CHECK_TOOL(NM, nm)
284 ZW_GNU_GETTEXT_SISTER_DIR
291 AM_CONDITIONAL(NATIVE_LINKER,
292 test "x$target_alias" = "x" -o "x$host_alias" = "x$target_alias")
293 AM_CONDITIONAL(GCC, test "$GCC" = yes)
295 AM_CONDITIONAL(NATIVE_OR_CROSS_LINKER,
296 test "x$target_alias" = "x" -o "x$host_alias" = "x$target_alias" -o "x$host_alias" = "x$build_alias")
298 dnl Test for whether static linking is supported. Some systems do not
299 dnl install static libraries. This only affects the set of tests that
301 AC_CACHE_CHECK([whether static linking works], [gold_cv_lib_static],
302 [LDFLAGS_hold=$LDFLAGS
303 LDFLAGS="$LDFLAGS -static"
305 AC_LANG_PROGRAM([[void f() { }]])],
306 [gold_cv_lib_static=yes], [gold_cv_lib_static=no])
307 LDFLAGS=$LDFLAGS_hold])
308 AM_CONDITIONAL(HAVE_STATIC, test "$gold_cv_lib_static" = "yes")
310 dnl Some architectures do not support taking pointers of functions
311 dnl defined in shared libraries except in -fPIC mode. We need to
312 dnl tell the unittest framework if we're compiling for one of those
313 dnl targets, so it doesn't try to run the tests that do that.
314 AM_CONDITIONAL(FN_PTRS_IN_SO_WITHOUT_PIC, [
322 dnl Test for gcc 4.1 or later. Full support for -mcmodel=medium is
323 dnl only available in gcc 4.1.
324 AC_CACHE_CHECK([for gcc >= 4.1], [gold_cv_prog_gcc41],
326 #if !defined __GNUC__
328 #elif __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 1)
331 ], [gold_cv_prog_gcc41=yes], [gold_cv_prog_gcc41=no])])
333 save_CFLAGS="$CFLAGS"
334 CFLAGS="$CFLAGS -mcmodel=medium"
335 AC_COMPILE_IFELSE([int i;], [have_mcmodel_medium=yes], [have_mcmodel_medium=no])
336 CFLAGS="$save_CFLAGS"
337 dnl Whether we can test -mcmodel=medium.
338 AM_CONDITIONAL(MCMODEL_MEDIUM,
339 [test "$target_cpu" = "x86_64" -a "$have_mcmodel_medium" = "yes" -a "$gold_cv_prog_gcc41" = "yes"])
341 dnl Test for __thread support.
342 AC_CACHE_CHECK([for thread support], [gold_cv_c_thread],
343 [AC_COMPILE_IFELSE([__thread int i = 1;],
344 [gold_cv_c_thread=yes], [gold_cv_c_thread=no])])
346 AM_CONDITIONAL(TLS, test "$gold_cv_c_thread" = "yes")
348 dnl On GNU/Linux TLS in static programs only works when using glibc
350 AC_CACHE_CHECK([for glibc >= 2.4], [gold_cv_lib_glibc24],
352 #include <features.h>
353 #if !defined __GLIBC__
355 #elif __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 4)
358 ], [gold_cv_lib_glibc24=yes], [gold_cv_lib_glibc24=no])])
360 AM_CONDITIONAL(STATIC_TLS, test "$gold_cv_lib_glibc24" = "yes")
362 dnl Test for #pragma omp threadprivate
363 AC_CACHE_CHECK([for omp support], [gold_cv_c_threadprivate],
364 [save_CFLAGS="$CFLAGS"
365 CFLAGS="$CFLAGS -fopenmp"
369 #pragma omp threadprivate (i)
370 ], [gold_cv_c_threadprivate=yes], [gold_cv_c_threadprivate=no])
371 CFLAGS="$save_CFLAGS"])
372 if test "$gold_cv_c_threadprivate" = "yes"; then
373 AC_DEFINE(HAVE_OMP_SUPPORT, 1,
374 [Define if compiler supports #pragma omp threadprivate])
376 AM_CONDITIONAL(OMP_SUPPORT, test "$gold_cv_c_threadprivate" = "yes")
378 dnl Test for the -ftls-dialect=gnu2 option.
379 save_CFLAGS="$CFLAGS"
380 CFLAGS="$CFLAGS -fpic -mtls-dialect=gnu2"
387 ], [have_tls_gnu2=yes], [have_tls_gnu2=no])
388 CFLAGS="$save_CFLAGS"
389 AM_CONDITIONAL(TLS_GNU2_DIALECT, test "$have_tls_gnu2" = "yes")
391 dnl On GNU/Linux TLS descriptors are supported by the dynamic loader
392 dnl only with glibc 2.9 or later.
393 AC_CACHE_CHECK([for glibc >= 2.9], [gold_cv_lib_glibc29],
395 #include <features.h>
396 #if !defined __GLIBC__
398 #elif __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 9)
401 ], [gold_cv_lib_glibc29=yes], [gold_cv_lib_glibc29=no])])
403 AM_CONDITIONAL(TLS_DESCRIPTORS, test "$gold_cv_lib_glibc29" = "yes")
405 dnl Test for the -frandom-seed option.
406 AC_CACHE_CHECK([for -frandom-seed support], [gold_cv_c_random_seed],
407 [save_CFLAGS="$CFLAGS"
408 CFLAGS="$CFLAGS -frandom-seed=foo"
409 AC_COMPILE_IFELSE([int i;], [gold_cv_c_random_seed=yes],
410 [gold_cv_c_random_seed=no])
411 CFLAGS="$save_CFLAGS"])
412 if test "$gold_cv_c_random_seed" = "yes"; then
413 # In Makefile, '$@' will be expanded to be the name of the file
414 # being built, providing a unique seed for each file.
415 RANDOM_SEED_CFLAGS=-frandom-seed=\$@
417 AC_SUBST(RANDOM_SEED_CFLAGS)
419 dnl On GNU/Linux ifunc is supported by the dynamic linker in glibc
420 dnl 2.11 or later, and by binutils 2.20.1 or later.
421 AC_CACHE_CHECK([for glibc ifunc support], [gold_cv_lib_glibc_ifunc],
422 [save_LDFLAGS="$LDFLAGS"
423 LDFLAGS="$LDFLAGS -static"
424 AC_LINK_IFELSE([AC_LANG_PROGRAM([[
425 #include <features.h>
426 #if !defined __GLIBC__
428 #elif __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 11)
433 __asm__(".type invoke, %gnu_indirect_function");
434 typedef void (*funcptr) (void);
435 funcptr dispatch (void) __asm__ ("invoke");
436 funcptr dispatch (void) { return &func; }]],
439 if ${NM} conftest$EXEEXT | grep "__rela\?_iplt_start" >/dev/null 2>&1; then
440 gold_cv_lib_glibc_ifunc=both
442 gold_cv_lib_glibc_ifunc=dyn
443 fi], [gold_cv_lib_glibc_ifunc=no])
444 LDFLAGS="$save_LDFLAGS"])
446 AM_CONDITIONAL(IFUNC, test "$gold_cv_lib_glibc_ifunc" != "no")
447 AM_CONDITIONAL(IFUNC_STATIC, test "$gold_cv_lib_glibc_ifunc" = "both")
451 WARN_CXXFLAGS=`echo ${WARN_CFLAGS} | sed -e 's/-Wstrict-prototypes//' -e 's/-Wmissing-prototypes//' -e 's/-Wshadow//'`
452 AC_SUBST(WARN_CXXFLAGS)
454 AC_ARG_WITH(gold-ldflags,
455 [ --with-gold-ldflags=FLAGS additional link flags for gold],
456 [if test "$withval" = "no" -o "$withval" = "yes"; then
459 GOLD_LDFLAGS=$withval
462 AC_SUBST(GOLD_LDFLAGS)
464 AC_ARG_WITH(gold-ldadd,
465 [ --with-gold-ldadd=LIBS additional libraries for gold],
466 [if test "$withval" = "no" -o "$withval" = "yes"; then
474 dnl Force support for large files by default. This may need to be
475 dnl host dependent. If build == host, we can check getconf LFS_CFLAGS.
476 LFS_CFLAGS="-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
479 AC_CHECK_HEADERS(sys/mman.h)
480 AC_CHECK_FUNCS(chsize mmap)
481 AC_REPLACE_FUNCS(pread ftruncate ffsll)
483 AC_CACHE_CHECK([mremap with MREMAP_MAYMOVE], [gold_cv_lib_mremap_maymove],
486 #include <sys/mman.h>
487 void f() { mremap (0, 0, 0, MREMAP_MAYMOVE); }
488 ]])], [gold_cv_lib_mremap_maymove=yes], [gold_cv_lib_mremap_maymove=no])])
489 if test "$gold_cv_lib_mremap_maymove" = "yes"; then
490 AC_DEFINE(HAVE_MREMAP, 1,
491 [Define to 1 if you have the mremap function with MREMAP_MAYMOVE support])
496 # Link in zlib if we can. This allows us to write compressed sections.
498 AM_CONDITIONAL(HAVE_ZLIB, test "$ac_cv_header_zlib_h" = "yes")
500 dnl We have to check these in C, not C++, because autoconf generates
501 dnl tests which have no type information, and current glibc provides
502 dnl multiple declarations of functions like basename when compiling
504 AC_CHECK_DECLS([basename, ffs, asprintf, vasprintf, snprintf, vsnprintf, strverscmp])
508 AC_CHECK_HEADERS(tr1/unordered_set tr1/unordered_map)
509 AC_CHECK_HEADERS(ext/hash_map ext/hash_set)
510 AC_CHECK_HEADERS(byteswap.h)
512 dnl When plugins enabled dynamic loader interface is required. Check headers
513 dnl which may provide this interface. In case of dlfcn.h add libdl to link.
514 AC_CHECK_HEADERS(windows.h)
515 AC_CHECK_HEADERS(dlfcn.h, [DLOPEN_LIBS="-ldl"], [DLOPEN_LIBS=""])
516 AC_SUBST(DLOPEN_LIBS)
518 AC_CHECK_FUNCS(mallinfo posix_fallocate fallocate readv sysconf times)
519 AC_CHECK_DECLS([basename, ffs, asprintf, vasprintf, snprintf, vsnprintf, strverscmp, strndup, memmem])
521 # Use of ::std::tr1::unordered_map::rehash causes undefined symbols
522 # at link time with some versions of GCC.
523 AC_CACHE_CHECK([whether ::std::tr1::unordered_map::rehash is usable.],
524 [gold_cv_unordered_map_rehash],
525 [AC_LINK_IFELSE([AC_LANG_PROGRAM([[
526 #include <tr1/unordered_map>
527 void bar() { ::std::tr1::unordered_map<int, int> x; x.rehash(10); }
528 ]])], [gold_cv_unordered_map_rehash=yes], [gold_cv_unordered_map_rehash=no])])
529 if test "$gold_cv_unordered_map_rehash" = "yes"; then
530 AC_DEFINE(HAVE_TR1_UNORDERED_MAP_REHASH, 1,
531 [Define if ::std::tr1::unordered_map::rehash is usable])
534 # Use of tr1/unordered_map with off_t as a key is not supported on GCC
535 # 4.1.xx when compiling in 32-bit mode with a 64-bit off_t type.
536 AC_CACHE_CHECK([whether std::tr1::hash<off_t> is defined],
537 [gold_cv_hash_off_t],
538 [CXXFLAGS_hold=$CXXFLAGS
539 CXXFLAGS="$CXXFLAGS $LFS_CFLAGS"
541 #include <sys/types.h>
542 #include <tr1/unordered_map>
543 std::tr1::hash<off_t> h;
545 [gold_cv_hash_off_t=yes],
546 [gold_cv_hash_off_t=no])
547 CXXFLAGS=$CXXFLAGS_hold])
548 if test "$gold_cv_hash_off_t" = "yes"; then
549 AC_DEFINE(HAVE_TR1_HASH_OFF_T, 1,
550 [Define if std::tr1::hash<off_t> is usable])
553 # gcc 4.3.0 doesn't recognize the printf attribute on a template
554 # function. Check for that. This is gcc bug 35546. This test can
555 # probably be removed after the bug has been fixed for a while.
556 AC_CACHE_CHECK([whether we can use attributes with template functions],
557 [gold_cv_template_attribute],
559 template<typename T> extern void foo(const char*, ...)
560 __attribute__ ((__format__ (__printf__, 1, 2)));
561 template<typename T> void foo(const char* format, ...) {}
562 void bar() { foo<int>("%s\n", "foo"); }
563 ], [gold_cv_template_attribute=yes], [gold_cv_template_attribute=no])])
564 if test "$gold_cv_template_attribute" = "yes"; then
565 AC_DEFINE(HAVE_TEMPLATE_ATTRIBUTES, 1,
566 [Define if attributes work on C++ templates])
569 dnl Check if the system has struct stat::st_mtim.
570 AC_CACHE_CHECK([for struct stat::st_mtim.],
571 [gold_cv_stat_st_mtim],
572 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
573 #include <sys/stat.h>
574 long bar() { struct stat s; return (long)(s.st_mtim.tv_sec + s.st_mtim.tv_sec);}
575 ]])], [gold_cv_stat_st_mtim=yes], [gold_cv_stat_st_mtim=no])])
576 if test "$gold_cv_stat_st_mtim" = "yes"; then
577 AC_DEFINE(HAVE_STAT_ST_MTIM, 1,
578 [Define if struct stat has a field st_mtim with timespec for mtime])
581 dnl Check if gcc supports the -gpubnames option.
582 save_CXXFLAGS="$CXXFLAGS"
583 CXXFLAGS="$CXXFLAGS -gpubnames"
584 AC_COMPILE_IFELSE([int i;], [have_pubnames=yes], [have_pubnames=no])
585 CXXFLAGS="$save_CXXFLAGS"
586 AM_CONDITIONAL(HAVE_PUBNAMES, test "$have_pubnames" = "yes")
590 AC_CHECK_HEADERS(locale.h)
591 AC_CHECK_FUNCS(setlocale)
596 AC_OUTPUT(Makefile testsuite/Makefile po/Makefile.in:po/Make-in)