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 Test for whether static linking is supported. Some systems do not
265 dnl install static libraries. This only affects the set of tests that
267 AC_CACHE_CHECK([whether static linking works], [gold_cv_lib_static],
268 [LDFLAGS_hold=$LDFLAGS
269 LDFLAGS="$LDFLAGS -static"
271 AC_LANG_PROGRAM([[void f() { }]])],
272 [gold_cv_lib_static=yes], [gold_cv_lib_static=no])
273 LDFLAGS=$LDFLAGS_hold])
274 AM_CONDITIONAL(HAVE_STATIC, test "$gold_cv_lib_static" = "yes")
276 dnl Some architectures do not support taking pointers of functions
277 dnl defined in shared libraries except in -fPIC mode. We need to
278 dnl tell the unittest framework if we're compiling for one of those
279 dnl targets, so it doesn't try to run the tests that do that.
280 AM_CONDITIONAL(FN_PTRS_IN_SO_WITHOUT_PIC, [
288 dnl Test for gcc 4.1 or later. Full support for -mcmodel=medium is
289 dnl only available in gcc 4.1.
290 AC_CACHE_CHECK([for gcc >= 4.1], [gold_cv_prog_gcc41],
292 #if !defined __GNUC__
294 #elif __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 1)
297 ], [gold_cv_prog_gcc41=yes], [gold_cv_prog_gcc41=no])])
299 dnl Whether we can test -mcmodel=medium.
300 AM_CONDITIONAL(MCMODEL_MEDIUM,
301 [test "$target_cpu" = "x86_64" -a "$gold_cv_prog_gcc41" = "yes"])
303 dnl Test for __thread support.
304 AC_CACHE_CHECK([for thread support], [gold_cv_c_thread],
305 [AC_COMPILE_IFELSE([__thread int i = 1;],
306 [gold_cv_c_thread=yes], [gold_cv_c_thread=no])])
308 AM_CONDITIONAL(TLS, test "$gold_cv_c_thread" = "yes")
310 dnl On GNU/Linux TLS in static programs only works when using glibc
312 AC_CACHE_CHECK([for glibc >= 2.4], [gold_cv_lib_glibc24],
314 #include <features.h>
315 #if !defined __GLIBC__
317 #elif __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 4)
320 ], [gold_cv_lib_glibc24=yes], [gold_cv_lib_glibc24=no])])
322 AM_CONDITIONAL(STATIC_TLS, test "$gold_cv_lib_glibc24" = "yes")
324 dnl Test for #pragma omp threadprivate
325 AC_CACHE_CHECK([for omp support], [gold_cv_c_threadprivate],
326 [save_CFLAGS="$CFLAGS"
327 CFLAGS="$CFLAGS -fopenmp"
331 #pragma omp threadprivate (i)
332 ], [gold_cv_c_threadprivate=yes], [gold_cv_c_threadprivate=no])
333 CFLAGS="$save_CFLAGS"])
334 if test "$gold_cv_c_threadprivate" = "yes"; then
335 AC_DEFINE(HAVE_OMP_SUPPORT, 1,
336 [Define if compiler supports #pragma omp threadprivate])
338 AM_CONDITIONAL(OMP_SUPPORT, test "$gold_cv_c_threadprivate" = "yes")
340 dnl Test for the -ftls-dialect=gnu2 option.
341 save_CFLAGS="$CFLAGS"
342 CFLAGS="$CFLAGS -mtls-dialect=gnu2"
343 AC_COMPILE_IFELSE([int i;], [have_tls_gnu2=yes], [have_tls_gnu2=no])
344 CFLAGS="$save_CFLAGS"
345 AM_CONDITIONAL(TLS_GNU2_DIALECT, test "$have_tls_gnu2" = "yes")
347 dnl On GNU/Linux TLS descriptors are supported by the dynamic loader
348 dnl only with glibc 2.9 or later.
349 AC_CACHE_CHECK([for glibc >= 2.9], [gold_cv_lib_glibc29],
351 #include <features.h>
352 #if !defined __GLIBC__
354 #elif __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 9)
357 ], [gold_cv_lib_glibc29=yes], [gold_cv_lib_glibc29=no])])
359 AM_CONDITIONAL(TLS_DESCRIPTORS, test "$gold_cv_lib_glibc29" = "yes")
361 dnl Test for the -frandom-seed option.
362 AC_CACHE_CHECK([for -frandom-seed support], [gold_cv_c_random_seed],
363 [save_CFLAGS="$CFLAGS"
364 CFLAGS="$CFLAGS -frandom-seed=foo"
365 AC_COMPILE_IFELSE([int i;], [gold_cv_c_random_seed=yes],
366 [gold_cv_c_random_seed=no])
367 CFLAGS="$save_CFLAGS"])
368 if test "$gold_cv_c_random_seed" = "yes"; then
369 # In Makefile, '$@' will be expanded to be the name of the file
370 # being built, providing a unique seed for each file.
371 RANDOM_SEED_CFLAGS=-frandom-seed=\$@
373 AC_SUBST(RANDOM_SEED_CFLAGS)
375 dnl On GNU/Linux ifunc is supported by the dynamic linker in glibc
376 dnl 2.11 or later, and by binutils 2.20.1 or later.
377 AC_CACHE_CHECK([for glibc >= 2.11], [gold_cv_lib_glibc2_11],
379 #include <features.h>
380 #if !defined __GLIBC__
382 #elif __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 11)
385 __asm__(".type foo, %gnu_indirect_function");
386 ], [gold_cv_lib_glibc2_11=yes], [gold_cv_lib_glibc2_11=no])])
388 AM_CONDITIONAL(IFUNC, test "$gold_cv_lib_glibc2_11" = "yes")
392 WARN_CXXFLAGS=`echo ${WARN_CFLAGS} | sed -e 's/-Wstrict-prototypes//' -e 's/-Wmissing-prototypes//' -e 's/-Wshadow//'`
393 AC_SUBST(WARN_CXXFLAGS)
395 dnl Force support for large files by default. This may need to be
396 dnl host dependent. If build == host, we can check getconf LFS_CFLAGS.
397 LFS_CFLAGS="-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
400 AC_CHECK_HEADERS(sys/mman.h)
401 AC_CHECK_FUNCS(chsize mmap)
402 AC_REPLACE_FUNCS(pread ftruncate ffsll)
404 AC_CACHE_CHECK([mremap with MREMAP_MAYMOVE], [gold_cv_lib_mremap_maymove],
407 #include <sys/mman.h>
408 void f() { mremap (0, 0, 0, MREMAP_MAYMOVE); }
409 ]])], [gold_cv_lib_mremap_maymove=yes], [gold_cv_lib_mremap_maymove=no])])
410 if test "$gold_cv_lib_mremap_maymove" = "yes"; then
411 AC_DEFINE(HAVE_MREMAP, 1,
412 [Define to 1 if you have the mremap function with MREMAP_MAYMOVE support])
417 # Link in zlib if we can. This allows us to write compressed sections.
418 AC_SEARCH_LIBS(zlibVersion, z, [AC_CHECK_HEADERS(zlib.h)])
419 AM_CONDITIONAL(HAVE_ZLIB, test "$ac_cv_search_zlibVersion" != "no")
421 dnl We have to check these in C, not C++, because autoconf generates
422 dnl tests which have no type information, and current glibc provides
423 dnl multiple declarations of functions like basename when compiling
425 AC_CHECK_DECLS([basename, ffs, asprintf, vasprintf, snprintf, vsnprintf, strverscmp])
429 AC_CHECK_HEADERS(tr1/unordered_set tr1/unordered_map)
430 AC_CHECK_HEADERS(ext/hash_map ext/hash_set)
431 AC_CHECK_HEADERS(byteswap.h)
432 AC_CHECK_FUNCS(mallinfo posix_fallocate readv sysconf times)
433 AC_CHECK_DECLS([basename, ffs, asprintf, vasprintf, snprintf, vsnprintf, strverscmp, strndup, memmem])
435 # Use of ::std::tr1::unordered_map::rehash causes undefined symbols
436 # at link time with some versions of GCC.
437 AC_CACHE_CHECK([whether ::std::tr1::unordered_map::rehash is usable.],
438 [gold_cv_unordered_map_rehash],
439 [AC_LINK_IFELSE([AC_LANG_PROGRAM([[
440 #include <tr1/unordered_map>
441 void bar() { ::std::tr1::unordered_map<int, int> x; x.rehash(10); }
442 ]])], [gold_cv_unordered_map_rehash=yes], [gold_cv_unordered_map_rehash=no])])
443 if test "$gold_cv_unordered_map_rehash" = "yes"; then
444 AC_DEFINE(HAVE_TR1_UNORDERED_MAP_REHASH, 1,
445 [Define if ::std::tr1::unordered_map::rehash is usable])
448 # gcc 4.3.0 doesn't recognize the printf attribute on a template
449 # function. Check for that. This is gcc bug 35546. This test can
450 # probably be removed after the bug has been fixed for a while.
451 AC_CACHE_CHECK([whether we can use attributes with template functions],
452 [gold_cv_template_attribute],
454 template<typename T> extern void foo(const char*, ...)
455 __attribute__ ((__format__ (__printf__, 1, 2)));
456 template<typename T> void foo(const char* format, ...) {}
457 void bar() { foo<int>("%s\n", "foo"); }
458 ], [gold_cv_template_attribute=yes], [gold_cv_template_attribute=no])])
459 if test "$gold_cv_template_attribute" = "yes"; then
460 AC_DEFINE(HAVE_TEMPLATE_ATTRIBUTES, 1,
461 [Define if attributes work on C++ templates])
464 dnl Check if the system has struct stat::st_mtim.
465 AC_CACHE_CHECK([for struct stat::st_mtim.],
466 [gold_cv_stat_st_mtim],
467 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
468 #include <sys/stat.h>
469 long bar() { struct stat s; return (long)(s.st_mtim.tv_sec + s.st_mtim.tv_sec);}
470 ]])], [gold_cv_stat_st_mtim=yes], [gold_cv_stat_st_mtim=no])])
471 if test "$gold_cv_stat_st_mtim" = "yes"; then
472 AC_DEFINE(HAVE_STAT_ST_MTIM, 1,
473 [Define if struct stat has a field st_mtim with timespec for mtime])
480 AC_OUTPUT(Makefile testsuite/Makefile po/Makefile.in:po/Make-in)