1 dnl Process this file with autoconf to produce a configure script.
6 AC_CONFIG_SRCDIR(gold.cc)
10 AM_INIT_AUTOMAKE([no-dist parallel-tests])
12 AM_CONFIG_HEADER(config.h:config.in)
15 [ --with-sysroot[=DIR] search for usr/lib et al within DIR],
16 [sysroot=$withval], [sysroot=no])
18 if test "$sysroot" = "yes"; then
19 sysroot='${exec_prefix}/${target_alias}/sys-root'
20 elif test "$sysroot" = "no"; then
25 if test -n "$sysroot"; then
27 "${prefix}" | "${prefix}/"* | \
28 "${exec_prefix}" | "${exec_prefix}/"* | \
29 '${prefix}' | '${prefix}/'*| \
30 '${exec_prefix}' | '${exec_prefix}/'*)
36 AC_DEFINE_UNQUOTED(TARGET_SYSTEM_ROOT, "$sysroot",
37 [System root for target files])
38 AC_DEFINE_UNQUOTED(TARGET_SYSTEM_ROOT_RELOCATABLE, $sysroot_relocatable,
39 [Whether the system root can be relocated])
41 dnl "install_as_default" is true if the linker to be installed as the
42 dnl default linker, ld.
43 dnl "installed_linker" is the installed gold linker name.
47 [[ --enable-ld[=ARG] build ld [ARG={default,yes,no}]]],
48 [case "${enableval}" in
55 [[ --enable-gold[=ARG] build gold [ARG={default,yes,no}]]],
56 [case "${enableval}" in
58 if test x${default_ld} = x; then
59 install_as_default=yes
61 installed_linker=ld.gold
66 AC_MSG_ERROR([invalid --enable-gold argument])
69 [install_as_default=no
70 installed_linker=ld.gold])
71 AC_SUBST(install_as_default)
72 AC_SUBST(installed_linker)
74 dnl For now threads are a configure time option.
75 AC_ARG_ENABLE([threads],
76 [ --enable-threads multi-threaded linking],
77 [case "${enableval}" in
78 yes | "") threads=yes ;;
83 if test "$threads" = "yes"; then
84 AC_DEFINE(ENABLE_THREADS, 1,
85 [Define to do multi-threaded linking])
87 AM_CONDITIONAL(THREADS, test "$threads" = "yes")
89 AC_ARG_ENABLE([plugins],
90 [ --enable-plugins linker plugins],
91 [case "${enableval}" in
92 yes | "") plugins=yes ;;
97 if test "$plugins" = "yes"; then
98 AC_DEFINE(ENABLE_PLUGINS, 1,
99 [Define to enable linker plugins])
101 AM_CONDITIONAL(PLUGINS, test "$plugins" = "yes")
103 AC_ARG_ENABLE([targets],
104 [ --enable-targets alternative target configurations],
105 [case "${enableval}" in
107 AC_MSG_ERROR([--enable-targets option must specify target names or 'all'])
113 enable_targets=$enableval
116 [# For now, enable all targets by default
120 # Canonicalize the enabled targets.
121 if test -n "$enable_targets"; then
122 for targ in `echo $enable_targets | sed -e 's/,/ /g'`; do
123 result=`$ac_config_sub $targ 2>/dev/null`
124 if test -n "$result"; then
125 canon_targets="$canon_targets $result"
127 # Permit unrecognized target names, like "all".
128 canon_targets="$canon_targets $targ"
133 # See which specific instantiations we need.
139 default_osabi=ELFOSABI_NONE
144 for targ in $target $canon_targets; do
145 if test "$targ" = "all"; then
152 . ${srcdir}/configure.tgt
154 if test "$targ_obj" = "UNKNOWN"; then
155 AC_MSG_ERROR("unsupported target $targ")
157 targetobjs="$targetobjs ${targ_obj}.\$(OBJEXT)"
158 if test "$targ_extra_obj" != ""; then
159 targetobjs="$targetobjs ${targ_extra_obj}.\$(OBJEXT)"
161 if test "$targ_size" = "32" -o "$targ_extra_size" = "32"; then
162 if test "$targ_big_endian" = "true" \
163 -o "$targ_extra_big_endian" = "true"; then
166 if test "$targ_big_endian" = "false" \
167 -o "$targ_extra_big_endian" = "false"; then
171 if test "$targ_size" = "64" -o "$targ_extra_size" = "64"; then
172 if test "$targ_big_endian" = "true" \
173 -o "$targ_extra_big_endian" = "true"; then
176 if test "$targ_big_endian" = "false" \
177 -o "$targ_extra_big_endian" = "false"; then
182 if test "$target" = "$targ"; then
183 default_machine=$targ_machine
184 default_size=$targ_size
185 default_big_endian=$targ_big_endian
186 default_osabi=$targ_osabi
188 AM_CONDITIONAL(DEFAULT_TARGET_ARM, test "$targ_obj" = "arm")
189 AM_CONDITIONAL(DEFAULT_TARGET_I386, test "$targ_obj" = "i386")
190 AM_CONDITIONAL(DEFAULT_TARGET_POWERPC, test "$targ_obj" = "powerpc")
191 AM_CONDITIONAL(DEFAULT_TARGET_SPARC, test "$targ_obj" = "sparc")
192 AM_CONDITIONAL(DEFAULT_TARGET_X86_64, test "$targ_obj" = "x86_64")
198 # Remove any duplicates.
200 for t in $targetobjs; do
208 if test -n "$targ_32_little"; then
209 AC_DEFINE(HAVE_TARGET_32_LITTLE, 1,
210 [Define to support 32-bit little-endian targets])
212 if test -n "$targ_32_big"; then
213 AC_DEFINE(HAVE_TARGET_32_BIG, 1,
214 [Define to support 32-bit big-endian targets])
216 if test -n "$targ_64_little"; then
217 AC_DEFINE(HAVE_TARGET_64_LITTLE, 1,
218 [Define to support 64-bit little-endian targets])
220 if test -n "$targ_64_big"; then
221 AC_DEFINE(HAVE_TARGET_64_BIG, 1,
222 [Define to support 64-bit big-endian targets])
225 if test -n "$all_targets"; then
226 TARGETOBJS='$(ALL_TARGETOBJS)'
228 TARGETOBJS="$targetobjs"
232 AC_DEFINE_UNQUOTED(GOLD_DEFAULT_MACHINE, $default_machine,
233 [Default machine code])
234 AC_DEFINE_UNQUOTED(GOLD_DEFAULT_SIZE, $default_size,
235 [Default size (32 or 64)])
236 AC_DEFINE_UNQUOTED(GOLD_DEFAULT_BIG_ENDIAN, $default_big_endian,
237 [Default big endian (true or false)])
238 AC_DEFINE_UNQUOTED(GOLD_DEFAULT_OSABI, $default_osabi,
239 [Default OSABI code])
250 ZW_GNU_GETTEXT_SISTER_DIR
257 AM_CONDITIONAL(NATIVE_LINKER,
258 test "x$target_alias" = "x" -o "x$host_alias" = "x$target_alias")
259 AM_CONDITIONAL(GCC, test "$GCC" = yes)
261 AM_CONDITIONAL(NATIVE_OR_CROSS_LINKER,
262 test "x$target_alias" = "x" -o "x$host_alias" = "x$target_alias" -o "x$host_alias" = "x$build_alias")
264 dnl Some architectures do not support taking pointers of functions
265 dnl defined in shared libraries except in -fPIC mode. We need to
266 dnl tell the unittest framework if we're compiling for one of those
267 dnl targets, so it doesn't try to run the tests that do that.
268 AM_CONDITIONAL(FN_PTRS_IN_SO_WITHOUT_PIC, [
276 dnl Test for gcc 4.1 or later. Full support for -mcmodel=medium is
277 dnl only available in gcc 4.1.
278 AC_CACHE_CHECK([for gcc >= 4.1], [gold_cv_prog_gcc41],
280 #if !defined __GNUC__
282 #elif __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 1)
285 ], [gold_cv_prog_gcc41=yes], [gold_cv_prog_gcc41=no])])
287 dnl Whether we can test -mcmodel=medium.
288 AM_CONDITIONAL(MCMODEL_MEDIUM,
289 [test "$target_cpu" = "x86_64" -a "$gold_cv_prog_gcc41" = "yes"])
291 dnl Test for __thread support.
292 AC_CACHE_CHECK([for thread support], [gold_cv_c_thread],
293 [AC_COMPILE_IFELSE([__thread int i = 1;],
294 [gold_cv_c_thread=yes], [gold_cv_c_thread=no])])
296 AM_CONDITIONAL(TLS, test "$gold_cv_c_thread" = "yes")
298 dnl On GNU/Linux TLS in static programs only works when using glibc
300 AC_CACHE_CHECK([for glibc >= 2.4], [gold_cv_lib_glibc24],
302 #include <features.h>
303 #if !defined __GLIBC__
305 #elif __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 4)
308 ], [gold_cv_lib_glibc24=yes], [gold_cv_lib_glibc24=no])])
310 AM_CONDITIONAL(STATIC_TLS, test "$gold_cv_lib_glibc24" = "yes")
312 dnl Test for #pragma omp threadprivate
313 AC_CACHE_CHECK([for omp support], [gold_cv_c_threadprivate],
314 [save_CFLAGS="$CFLAGS"
315 CFLAGS="$CFLAGS -fopenmp"
319 #pragma omp threadprivate (i)
320 ], [gold_cv_c_threadprivate=yes], [gold_cv_c_threadprivate=no])
321 CFLAGS="$save_CFLAGS"])
322 if test "$gold_cv_c_threadprivate" = "yes"; then
323 AC_DEFINE(HAVE_OMP_SUPPORT, 1,
324 [Define if compiler supports #pragma omp threadprivate])
326 AM_CONDITIONAL(OMP_SUPPORT, test "$gold_cv_c_threadprivate" = "yes")
328 dnl Test for the -ftls-dialect=gnu2 option.
329 save_CFLAGS="$CFLAGS"
330 CFLAGS="$CFLAGS -mtls-dialect=gnu2"
331 AC_COMPILE_IFELSE([int i;], [have_tls_gnu2=yes], [have_tls_gnu2=no])
332 CFLAGS="$save_CFLAGS"
333 AM_CONDITIONAL(TLS_GNU2_DIALECT, test "$have_tls_gnu2" = "yes")
335 dnl On GNU/Linux TLS descriptors are supported by the dynamic loader
336 dnl only with glibc 2.9 or later.
337 AC_CACHE_CHECK([for glibc >= 2.9], [gold_cv_lib_glibc29],
339 #include <features.h>
340 #if !defined __GLIBC__
342 #elif __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 9)
345 ], [gold_cv_lib_glibc29=yes], [gold_cv_lib_glibc29=no])])
347 AM_CONDITIONAL(TLS_DESCRIPTORS, test "$gold_cv_lib_glibc29" = "yes")
349 dnl Check whether the compiler supports constructor priorities in
350 dnl attributes, which were added in gcc 4.3.
351 AC_CACHE_CHECK([for constructor priorities], [gold_cv_c_conprio],
352 [AC_COMPILE_IFELSE([void f() __attribute__ ((constructor (1)));],
353 [gold_cv_c_conprio=yes], [gold_cv_c_conprio=no])])
355 AM_CONDITIONAL(CONSTRUCTOR_PRIORITY, test "$gold_cv_c_conprio" = "yes")
357 dnl Test for the -frandom-seed option.
358 AC_CACHE_CHECK([for -frandom-seed support], [gold_cv_c_random_seed],
359 [save_CFLAGS="$CFLAGS"
360 CFLAGS="$CFLAGS -frandom-seed=foo"
361 AC_COMPILE_IFELSE([int i;], [gold_cv_c_random_seed=yes],
362 [gold_cv_c_random_seed=no])
363 CFLAGS="$save_CFLAGS"])
364 if test "$gold_cv_c_random_seed" = "yes"; then
365 # In Makefile, '$@' will be expanded to be the name of the file
366 # being built, providing a unique seed for each file.
367 RANDOM_SEED_CFLAGS=-frandom-seed=\$@
369 AC_SUBST(RANDOM_SEED_CFLAGS)
371 dnl On GNU/Linux ifunc is supported by the dynamic linker in glibc
373 AC_CACHE_CHECK([for glibc >= 2.11], [gold_cv_lib_glibc2_11],
375 #include <features.h>
376 #if !defined __GLIBC__
378 #elif __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 11)
381 ], [gold_cv_lib_glibc2_11=yes], [gold_cv_lib_glibc2_11=no])])
383 AM_CONDITIONAL(IFUNC, test "$gold_cv_lib_glibc2_11" = "yes")
387 WARN_CXXFLAGS=`echo ${WARN_CFLAGS} | sed -e 's/-Wstrict-prototypes//' -e 's/-Wmissing-prototypes//' -e 's/-Wshadow//'`
388 AC_SUBST(WARN_CXXFLAGS)
390 dnl Force support for large files by default. This may need to be
391 dnl host dependent. If build == host, we can check getconf LFS_CFLAGS.
392 LFS_CFLAGS="-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
395 AC_CHECK_FUNCS(chsize)
396 AC_REPLACE_FUNCS(pread ftruncate mremap ffsll)
398 # Link in zlib if we can. This allows us to write compressed sections.
399 AC_SEARCH_LIBS(zlibVersion, z, [AC_CHECK_HEADERS(zlib.h)])
400 AM_CONDITIONAL(HAVE_ZLIB, test "$ac_cv_search_zlibVersion" != "no")
402 dnl We have to check these in C, not C++, because autoconf generates
403 dnl tests which have no type information, and current glibc provides
404 dnl multiple declarations of functions like basename when compiling
406 AC_CHECK_DECLS([basename, ffs, asprintf, vasprintf, snprintf, vsnprintf, strverscmp])
410 AC_CHECK_HEADERS(tr1/unordered_set tr1/unordered_map)
411 AC_CHECK_HEADERS(ext/hash_map ext/hash_set)
412 AC_CHECK_HEADERS(byteswap.h)
413 AC_CHECK_FUNCS(mallinfo posix_fallocate readv sysconf times)
414 AC_CHECK_DECLS([basename, ffs, asprintf, vasprintf, snprintf, vsnprintf, strverscmp, strndup, memmem])
416 # Use of ::std::tr1::unordered_map::rehash causes undefined symbols
417 # at link time with some versions of GCC.
418 AC_CACHE_CHECK([whether ::std::tr1::unordered_map::rehash is usable.],
419 [gold_cv_unordered_map_rehash],
420 [AC_LINK_IFELSE([AC_LANG_PROGRAM([[
421 #include <tr1/unordered_map>
422 void bar() { ::std::tr1::unordered_map<int, int> x; x.rehash(10); }
423 ]])], [gold_cv_unordered_map_rehash=yes], [gold_cv_unordered_map_rehash=no])])
424 if test "$gold_cv_unordered_map_rehash" = "yes"; then
425 AC_DEFINE(HAVE_TR1_UNORDERED_MAP_REHASH, 1,
426 [Define if ::std::tr1::unordered_map::rehash is usable])
429 # gcc 4.3.0 doesn't recognize the printf attribute on a template
430 # function. Check for that. This is gcc bug 35546. This test can
431 # probably be removed after the bug has been fixed for a while.
432 AC_CACHE_CHECK([whether we can use attributes with template functions],
433 [gold_cv_template_attribute],
435 template<typename T> extern void foo(const char*, ...)
436 __attribute__ ((__format__ (__printf__, 1, 2)));
437 template<typename T> void foo(const char* format, ...) {}
438 void bar() { foo<int>("%s\n", "foo"); }
439 ], [gold_cv_template_attribute=yes], [gold_cv_template_attribute=no])])
440 if test "$gold_cv_template_attribute" = "yes"; then
441 AC_DEFINE(HAVE_TEMPLATE_ATTRIBUTES, 1,
442 [Define if attributes work on C++ templates])
445 dnl Check if the system has struct stat::st_mtim.
446 AC_CACHE_CHECK([for struct stat::st_mtim.],
447 [gold_cv_stat_st_mtim],
448 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
449 #include <sys/stat.h>
450 long bar() { struct stat s; return (long)(s.st_mtim.tv_sec + s.st_mtim.tv_sec);}
451 ]])], [gold_cv_stat_st_mtim=yes], [gold_cv_stat_st_mtim=no])])
452 if test "$gold_cv_stat_st_mtim" = "yes"; then
453 AC_DEFINE(HAVE_STAT_ST_MTIM, 1,
454 [Define if struct stat has a field st_mtim with timespec for mtime])
461 AC_OUTPUT(Makefile testsuite/Makefile po/Makefile.in:po/Make-in)