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 AC_CACHE_CHECK([whether $CC supports -fmerge-constants],
342 [gold_cv_merge_constants], [
343 save_CFLAGS="$CFLAGS"
344 CFLAGS="$CFLAGS -fmerge-constants"
345 AC_COMPILE_IFELSE([const char *s = "foo";],
346 [have_merge_constants=yes],
347 [have_merge_constants=no])
348 CFLAGS="$save_CFLAGS"])
349 AC_SUBST([MERGE_CONSTANTS_FLAG])
350 AS_IF([test "$gold_cv_merge_constants" = yes],
351 [MERGE_CONSTANTS_FLAG=-fmerge-constants],
352 [MERGE_CONSTANTS_FLAG=])
354 dnl Test for __thread support.
355 AC_CACHE_CHECK([for thread support], [gold_cv_c_thread],
356 [AC_COMPILE_IFELSE([__thread int i = 1;],
357 [gold_cv_c_thread=yes], [gold_cv_c_thread=no])])
359 AM_CONDITIONAL(TLS, test "$gold_cv_c_thread" = "yes")
361 dnl On GNU/Linux TLS in static programs only works when using glibc
363 AC_CACHE_CHECK([for glibc >= 2.4], [gold_cv_lib_glibc24],
365 #include <features.h>
366 #if !defined __GLIBC__
368 #elif __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 4)
371 ], [gold_cv_lib_glibc24=yes], [gold_cv_lib_glibc24=no])])
373 AM_CONDITIONAL(STATIC_TLS, test "$gold_cv_lib_glibc24" = "yes")
375 dnl Test for #pragma omp threadprivate
376 AC_CACHE_CHECK([for omp support], [gold_cv_c_threadprivate],
377 [save_CFLAGS="$CFLAGS"
378 CFLAGS="$CFLAGS -fopenmp"
382 #pragma omp threadprivate (i)
383 ], [gold_cv_c_threadprivate=yes], [gold_cv_c_threadprivate=no])
384 CFLAGS="$save_CFLAGS"])
385 if test "$gold_cv_c_threadprivate" = "yes"; then
386 AC_DEFINE(HAVE_OMP_SUPPORT, 1,
387 [Define if compiler supports #pragma omp threadprivate])
389 AM_CONDITIONAL(OMP_SUPPORT, test "$gold_cv_c_threadprivate" = "yes")
391 dnl Test for the -ftls-dialect=gnu2 option.
392 save_CFLAGS="$CFLAGS"
393 CFLAGS="$CFLAGS -fpic -mtls-dialect=gnu2"
400 ], [have_tls_gnu2=yes], [have_tls_gnu2=no])
401 CFLAGS="$save_CFLAGS"
402 AM_CONDITIONAL(TLS_GNU2_DIALECT, test "$have_tls_gnu2" = "yes")
404 dnl On GNU/Linux TLS descriptors are supported by the dynamic loader
405 dnl only with glibc 2.9 or later.
406 AC_CACHE_CHECK([for glibc >= 2.9], [gold_cv_lib_glibc29],
408 #include <features.h>
409 #if !defined __GLIBC__
411 #elif __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 9)
414 ], [gold_cv_lib_glibc29=yes], [gold_cv_lib_glibc29=no])])
416 AM_CONDITIONAL(TLS_DESCRIPTORS, test "$gold_cv_lib_glibc29" = "yes")
418 dnl Test for the -frandom-seed option.
419 AC_CACHE_CHECK([for -frandom-seed support], [gold_cv_c_random_seed],
420 [save_CFLAGS="$CFLAGS"
421 CFLAGS="$CFLAGS -frandom-seed=foo"
422 AC_COMPILE_IFELSE([int i;], [gold_cv_c_random_seed=yes],
423 [gold_cv_c_random_seed=no])
424 CFLAGS="$save_CFLAGS"])
425 if test "$gold_cv_c_random_seed" = "yes"; then
426 # In Makefile, '$@' will be expanded to be the name of the file
427 # being built, providing a unique seed for each file.
428 RANDOM_SEED_CFLAGS=-frandom-seed=\$@
430 AC_SUBST(RANDOM_SEED_CFLAGS)
432 dnl On GNU/Linux ifunc is supported by the dynamic linker in glibc
433 dnl 2.11 or later, and by binutils 2.20.1 or later.
434 AC_CACHE_CHECK([for glibc ifunc support], [gold_cv_lib_glibc_ifunc],
435 [save_LDFLAGS="$LDFLAGS"
436 LDFLAGS="$LDFLAGS -static"
437 AC_LINK_IFELSE([AC_LANG_PROGRAM([[
438 #include <features.h>
439 #if !defined __GLIBC__
441 #elif __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 11)
446 __asm__(".type invoke, %gnu_indirect_function");
447 typedef void (*funcptr) (void);
448 funcptr dispatch (void) __asm__ ("invoke");
449 funcptr dispatch (void) { return &func; }]],
452 if ${NM} conftest$EXEEXT | grep "__rela\?_iplt_start" >/dev/null 2>&1; then
453 gold_cv_lib_glibc_ifunc=both
455 gold_cv_lib_glibc_ifunc=dyn
456 fi], [gold_cv_lib_glibc_ifunc=no])
457 LDFLAGS="$save_LDFLAGS"])
459 AM_CONDITIONAL(IFUNC, test "$gold_cv_lib_glibc_ifunc" != "no")
460 AM_CONDITIONAL(IFUNC_STATIC, test "$gold_cv_lib_glibc_ifunc" = "both")
464 WARN_CXXFLAGS=`echo ${WARN_CFLAGS} | sed -e 's/-Wstrict-prototypes//' -e 's/-Wmissing-prototypes//' -e 's/-Wshadow//'`
465 AC_SUBST(WARN_CXXFLAGS)
467 AC_ARG_WITH(gold-ldflags,
468 [ --with-gold-ldflags=FLAGS additional link flags for gold],
469 [if test "$withval" = "no" -o "$withval" = "yes"; then
472 GOLD_LDFLAGS=$withval
475 AC_SUBST(GOLD_LDFLAGS)
477 AC_ARG_WITH(gold-ldadd,
478 [ --with-gold-ldadd=LIBS additional libraries for gold],
479 [if test "$withval" = "no" -o "$withval" = "yes"; then
487 dnl Force support for large files by default. This may need to be
488 dnl host dependent. If build == host, we can check getconf LFS_CFLAGS.
489 LFS_CFLAGS="-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
492 AC_CHECK_HEADERS(sys/mman.h)
493 AC_CHECK_FUNCS(chsize mmap)
494 AC_REPLACE_FUNCS(pread ftruncate ffsll)
496 AC_CACHE_CHECK([mremap with MREMAP_MAYMOVE], [gold_cv_lib_mremap_maymove],
499 #include <sys/mman.h>
500 void f() { mremap (0, 0, 0, MREMAP_MAYMOVE); }
501 ]])], [gold_cv_lib_mremap_maymove=yes], [gold_cv_lib_mremap_maymove=no])])
502 if test "$gold_cv_lib_mremap_maymove" = "yes"; then
503 AC_DEFINE(HAVE_MREMAP, 1,
504 [Define to 1 if you have the mremap function with MREMAP_MAYMOVE support])
509 # Link in zlib if we can. This allows us to write compressed sections.
511 AM_CONDITIONAL(HAVE_ZLIB, test "$ac_cv_header_zlib_h" = "yes")
513 dnl We have to check these in C, not C++, because autoconf generates
514 dnl tests which have no type information, and current glibc provides
515 dnl multiple declarations of functions like basename when compiling
517 AC_CHECK_DECLS([basename, ffs, asprintf, vasprintf, snprintf, vsnprintf, strverscmp])
521 AC_CHECK_HEADERS(tr1/unordered_set tr1/unordered_map)
522 AC_CHECK_HEADERS(ext/hash_map ext/hash_set)
523 AC_CHECK_HEADERS(byteswap.h)
525 dnl When plugins enabled dynamic loader interface is required. Check headers
526 dnl which may provide this interface. In case of dlfcn.h add libdl to link.
527 AC_CHECK_HEADERS(windows.h)
528 AC_CHECK_HEADERS(dlfcn.h, [DLOPEN_LIBS="-ldl"], [DLOPEN_LIBS=""])
529 AC_SUBST(DLOPEN_LIBS)
531 AC_CHECK_FUNCS(mallinfo posix_fallocate fallocate readv sysconf times)
532 AC_CHECK_DECLS([basename, ffs, asprintf, vasprintf, snprintf, vsnprintf, strverscmp, strndup, memmem])
534 # Use of ::std::tr1::unordered_map::rehash causes undefined symbols
535 # at link time with some versions of GCC.
536 AC_CACHE_CHECK([whether ::std::tr1::unordered_map::rehash is usable.],
537 [gold_cv_unordered_map_rehash],
538 [AC_LINK_IFELSE([AC_LANG_PROGRAM([[
539 #include <tr1/unordered_map>
540 void bar() { ::std::tr1::unordered_map<int, int> x; x.rehash(10); }
541 ]])], [gold_cv_unordered_map_rehash=yes], [gold_cv_unordered_map_rehash=no])])
542 if test "$gold_cv_unordered_map_rehash" = "yes"; then
543 AC_DEFINE(HAVE_TR1_UNORDERED_MAP_REHASH, 1,
544 [Define if ::std::tr1::unordered_map::rehash is usable])
547 # Use of tr1/unordered_map with off_t as a key is not supported on GCC
548 # 4.1.xx when compiling in 32-bit mode with a 64-bit off_t type.
549 AC_CACHE_CHECK([whether std::tr1::hash<off_t> is defined],
550 [gold_cv_hash_off_t],
551 [CXXFLAGS_hold=$CXXFLAGS
552 CXXFLAGS="$CXXFLAGS $LFS_CFLAGS"
554 #include <sys/types.h>
555 #include <tr1/unordered_map>
556 std::tr1::hash<off_t> h;
558 [gold_cv_hash_off_t=yes],
559 [gold_cv_hash_off_t=no])
560 CXXFLAGS=$CXXFLAGS_hold])
561 if test "$gold_cv_hash_off_t" = "yes"; then
562 AC_DEFINE(HAVE_TR1_HASH_OFF_T, 1,
563 [Define if std::tr1::hash<off_t> is usable])
566 # gcc 4.3.0 doesn't recognize the printf attribute on a template
567 # function. Check for that. This is gcc bug 35546. This test can
568 # probably be removed after the bug has been fixed for a while.
569 AC_CACHE_CHECK([whether we can use attributes with template functions],
570 [gold_cv_template_attribute],
572 template<typename T> extern void foo(const char*, ...)
573 __attribute__ ((__format__ (__printf__, 1, 2)));
574 template<typename T> void foo(const char* format, ...) {}
575 void bar() { foo<int>("%s\n", "foo"); }
576 ], [gold_cv_template_attribute=yes], [gold_cv_template_attribute=no])])
577 if test "$gold_cv_template_attribute" = "yes"; then
578 AC_DEFINE(HAVE_TEMPLATE_ATTRIBUTES, 1,
579 [Define if attributes work on C++ templates])
582 dnl Check if the system has struct stat::st_mtim.
583 AC_CACHE_CHECK([for struct stat::st_mtim.],
584 [gold_cv_stat_st_mtim],
585 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
586 #include <sys/stat.h>
587 long bar() { struct stat s; return (long)(s.st_mtim.tv_sec + s.st_mtim.tv_sec);}
588 ]])], [gold_cv_stat_st_mtim=yes], [gold_cv_stat_st_mtim=no])])
589 if test "$gold_cv_stat_st_mtim" = "yes"; then
590 AC_DEFINE(HAVE_STAT_ST_MTIM, 1,
591 [Define if struct stat has a field st_mtim with timespec for mtime])
594 dnl Check if gcc supports the -gpubnames option.
595 save_CXXFLAGS="$CXXFLAGS"
596 CXXFLAGS="$CXXFLAGS -gpubnames"
597 AC_COMPILE_IFELSE([int i;], [have_pubnames=yes], [have_pubnames=no])
598 CXXFLAGS="$save_CXXFLAGS"
599 AM_CONDITIONAL(HAVE_PUBNAMES, test "$have_pubnames" = "yes")
603 AC_CHECK_HEADERS(locale.h)
604 AC_CHECK_FUNCS(setlocale)
609 AC_OUTPUT(Makefile testsuite/Makefile po/Makefile.in:po/Make-in)