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, $default_osabi,
239 [Default OSABI code])
241 AC_ARG_WITH(lib-path,
242 [ --with-lib-path=dir1:dir2... set default LIB_PATH],
244 yes) LIB_PATH='"/lib:/usr/lib"' ;;
246 *) LIB_PATH='"'"$withval"'"' ;;
248 [LIB_PATH='"::DEFAULT::"'])
249 AC_DEFINE_UNQUOTED(LIB_PATH, $LIB_PATH,
250 [Default library search path])
251 if test "x$target_alias" = "x" -o "x$host_alias" = "x$target_alias"; then
252 AC_DEFINE(NATIVE_LINKER, 1, [Whether configured as a native linker])
255 AC_CHECK_TOOL(NM, nm)
266 ZW_GNU_GETTEXT_SISTER_DIR
273 AM_CONDITIONAL(NATIVE_LINKER,
274 test "x$target_alias" = "x" -o "x$host_alias" = "x$target_alias")
275 AM_CONDITIONAL(GCC, test "$GCC" = yes)
277 AM_CONDITIONAL(NATIVE_OR_CROSS_LINKER,
278 test "x$target_alias" = "x" -o "x$host_alias" = "x$target_alias" -o "x$host_alias" = "x$build_alias")
280 dnl Test for whether static linking is supported. Some systems do not
281 dnl install static libraries. This only affects the set of tests that
283 AC_CACHE_CHECK([whether static linking works], [gold_cv_lib_static],
284 [LDFLAGS_hold=$LDFLAGS
285 LDFLAGS="$LDFLAGS -static"
287 AC_LANG_PROGRAM([[void f() { }]])],
288 [gold_cv_lib_static=yes], [gold_cv_lib_static=no])
289 LDFLAGS=$LDFLAGS_hold])
290 AM_CONDITIONAL(HAVE_STATIC, test "$gold_cv_lib_static" = "yes")
292 dnl Some architectures do not support taking pointers of functions
293 dnl defined in shared libraries except in -fPIC mode. We need to
294 dnl tell the unittest framework if we're compiling for one of those
295 dnl targets, so it doesn't try to run the tests that do that.
296 AM_CONDITIONAL(FN_PTRS_IN_SO_WITHOUT_PIC, [
304 dnl Test for gcc 4.1 or later. Full support for -mcmodel=medium is
305 dnl only available in gcc 4.1.
306 AC_CACHE_CHECK([for gcc >= 4.1], [gold_cv_prog_gcc41],
308 #if !defined __GNUC__
310 #elif __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 1)
313 ], [gold_cv_prog_gcc41=yes], [gold_cv_prog_gcc41=no])])
315 dnl Whether we can test -mcmodel=medium.
316 AM_CONDITIONAL(MCMODEL_MEDIUM,
317 [test "$target_cpu" = "x86_64" -a "$gold_cv_prog_gcc41" = "yes"])
319 dnl Test for __thread support.
320 AC_CACHE_CHECK([for thread support], [gold_cv_c_thread],
321 [AC_COMPILE_IFELSE([__thread int i = 1;],
322 [gold_cv_c_thread=yes], [gold_cv_c_thread=no])])
324 AM_CONDITIONAL(TLS, test "$gold_cv_c_thread" = "yes")
326 dnl On GNU/Linux TLS in static programs only works when using glibc
328 AC_CACHE_CHECK([for glibc >= 2.4], [gold_cv_lib_glibc24],
330 #include <features.h>
331 #if !defined __GLIBC__
333 #elif __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 4)
336 ], [gold_cv_lib_glibc24=yes], [gold_cv_lib_glibc24=no])])
338 AM_CONDITIONAL(STATIC_TLS, test "$gold_cv_lib_glibc24" = "yes")
340 dnl Test for #pragma omp threadprivate
341 AC_CACHE_CHECK([for omp support], [gold_cv_c_threadprivate],
342 [save_CFLAGS="$CFLAGS"
343 CFLAGS="$CFLAGS -fopenmp"
347 #pragma omp threadprivate (i)
348 ], [gold_cv_c_threadprivate=yes], [gold_cv_c_threadprivate=no])
349 CFLAGS="$save_CFLAGS"])
350 if test "$gold_cv_c_threadprivate" = "yes"; then
351 AC_DEFINE(HAVE_OMP_SUPPORT, 1,
352 [Define if compiler supports #pragma omp threadprivate])
354 AM_CONDITIONAL(OMP_SUPPORT, test "$gold_cv_c_threadprivate" = "yes")
356 dnl Test for the -ftls-dialect=gnu2 option.
357 save_CFLAGS="$CFLAGS"
358 CFLAGS="$CFLAGS -mtls-dialect=gnu2"
359 AC_COMPILE_IFELSE([int i;], [have_tls_gnu2=yes], [have_tls_gnu2=no])
360 CFLAGS="$save_CFLAGS"
361 AM_CONDITIONAL(TLS_GNU2_DIALECT, test "$have_tls_gnu2" = "yes")
363 dnl On GNU/Linux TLS descriptors are supported by the dynamic loader
364 dnl only with glibc 2.9 or later.
365 AC_CACHE_CHECK([for glibc >= 2.9], [gold_cv_lib_glibc29],
367 #include <features.h>
368 #if !defined __GLIBC__
370 #elif __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 9)
373 ], [gold_cv_lib_glibc29=yes], [gold_cv_lib_glibc29=no])])
375 AM_CONDITIONAL(TLS_DESCRIPTORS, test "$gold_cv_lib_glibc29" = "yes")
377 dnl Test for the -frandom-seed option.
378 AC_CACHE_CHECK([for -frandom-seed support], [gold_cv_c_random_seed],
379 [save_CFLAGS="$CFLAGS"
380 CFLAGS="$CFLAGS -frandom-seed=foo"
381 AC_COMPILE_IFELSE([int i;], [gold_cv_c_random_seed=yes],
382 [gold_cv_c_random_seed=no])
383 CFLAGS="$save_CFLAGS"])
384 if test "$gold_cv_c_random_seed" = "yes"; then
385 # In Makefile, '$@' will be expanded to be the name of the file
386 # being built, providing a unique seed for each file.
387 RANDOM_SEED_CFLAGS=-frandom-seed=\$@
389 AC_SUBST(RANDOM_SEED_CFLAGS)
391 dnl On GNU/Linux ifunc is supported by the dynamic linker in glibc
392 dnl 2.11 or later, and by binutils 2.20.1 or later.
393 AC_CACHE_CHECK([for glibc ifunc support], [gold_cv_lib_glibc_ifunc],
394 [save_LDFLAGS="$LDFLAGS"
395 LDFLAGS="$LDFLAGS -static"
396 AC_LINK_IFELSE([AC_LANG_PROGRAM([[
397 #include <features.h>
398 #if !defined __GLIBC__
400 #elif __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 11)
405 __asm__(".type invoke, %gnu_indirect_function");
406 typedef void (*funcptr) (void);
407 funcptr dispatch (void) __asm__ ("invoke");
408 funcptr dispatch (void) { return &func; }]],
411 if ${NM} conftest$EXEEXT | grep "__rela\?_iplt_start" >/dev/null 2>&1; then
412 gold_cv_lib_glibc_ifunc=both
414 gold_cv_lib_glibc_ifunc=dyn
415 fi], [gold_cv_lib_glibc_ifunc=no])
416 LDFLAGS="$save_LDFLAGS"])
418 AM_CONDITIONAL(IFUNC, test "$gold_cv_lib_glibc_ifunc" != "no")
419 AM_CONDITIONAL(IFUNC_STATIC, test "$gold_cv_lib_glibc_ifunc" = "both")
423 WARN_CXXFLAGS=`echo ${WARN_CFLAGS} | sed -e 's/-Wstrict-prototypes//' -e 's/-Wmissing-prototypes//' -e 's/-Wshadow//'`
424 AC_SUBST(WARN_CXXFLAGS)
426 AC_ARG_WITH(gold-ldflags,
427 [ --with-gold-ldflags=FLAGS additional link flags for gold],
428 [if test "$withval" = "no" -o "$withval" = "yes"; then
431 GOLD_LDFLAGS=$withval
434 AC_SUBST(GOLD_LDFLAGS)
436 AC_ARG_WITH(gold-ldadd,
437 [ --with-gold-ldadd=LIBS additional libraries for gold],
438 [if test "$withval" = "no" -o "$withval" = "yes"; then
446 dnl Force support for large files by default. This may need to be
447 dnl host dependent. If build == host, we can check getconf LFS_CFLAGS.
448 LFS_CFLAGS="-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
451 AC_CHECK_HEADERS(sys/mman.h)
452 AC_CHECK_FUNCS(chsize mmap)
453 AC_REPLACE_FUNCS(pread ftruncate ffsll)
455 AC_CACHE_CHECK([mremap with MREMAP_MAYMOVE], [gold_cv_lib_mremap_maymove],
458 #include <sys/mman.h>
459 void f() { mremap (0, 0, 0, MREMAP_MAYMOVE); }
460 ]])], [gold_cv_lib_mremap_maymove=yes], [gold_cv_lib_mremap_maymove=no])])
461 if test "$gold_cv_lib_mremap_maymove" = "yes"; then
462 AC_DEFINE(HAVE_MREMAP, 1,
463 [Define to 1 if you have the mremap function with MREMAP_MAYMOVE support])
468 # Link in zlib if we can. This allows us to write compressed sections.
469 AC_SEARCH_LIBS(zlibVersion, z, [AC_CHECK_HEADERS(zlib.h)])
470 AM_CONDITIONAL(HAVE_ZLIB, test "$ac_cv_search_zlibVersion" != "no")
472 dnl We have to check these in C, not C++, because autoconf generates
473 dnl tests which have no type information, and current glibc provides
474 dnl multiple declarations of functions like basename when compiling
476 AC_CHECK_DECLS([basename, ffs, asprintf, vasprintf, snprintf, vsnprintf, strverscmp])
480 AC_CHECK_HEADERS(tr1/unordered_set tr1/unordered_map)
481 AC_CHECK_HEADERS(ext/hash_map ext/hash_set)
482 AC_CHECK_HEADERS(byteswap.h)
483 AC_CHECK_FUNCS(mallinfo posix_fallocate readv sysconf times)
484 AC_CHECK_DECLS([basename, ffs, asprintf, vasprintf, snprintf, vsnprintf, strverscmp, strndup, memmem])
486 # Use of ::std::tr1::unordered_map::rehash causes undefined symbols
487 # at link time with some versions of GCC.
488 AC_CACHE_CHECK([whether ::std::tr1::unordered_map::rehash is usable.],
489 [gold_cv_unordered_map_rehash],
490 [AC_LINK_IFELSE([AC_LANG_PROGRAM([[
491 #include <tr1/unordered_map>
492 void bar() { ::std::tr1::unordered_map<int, int> x; x.rehash(10); }
493 ]])], [gold_cv_unordered_map_rehash=yes], [gold_cv_unordered_map_rehash=no])])
494 if test "$gold_cv_unordered_map_rehash" = "yes"; then
495 AC_DEFINE(HAVE_TR1_UNORDERED_MAP_REHASH, 1,
496 [Define if ::std::tr1::unordered_map::rehash is usable])
499 # gcc 4.3.0 doesn't recognize the printf attribute on a template
500 # function. Check for that. This is gcc bug 35546. This test can
501 # probably be removed after the bug has been fixed for a while.
502 AC_CACHE_CHECK([whether we can use attributes with template functions],
503 [gold_cv_template_attribute],
505 template<typename T> extern void foo(const char*, ...)
506 __attribute__ ((__format__ (__printf__, 1, 2)));
507 template<typename T> void foo(const char* format, ...) {}
508 void bar() { foo<int>("%s\n", "foo"); }
509 ], [gold_cv_template_attribute=yes], [gold_cv_template_attribute=no])])
510 if test "$gold_cv_template_attribute" = "yes"; then
511 AC_DEFINE(HAVE_TEMPLATE_ATTRIBUTES, 1,
512 [Define if attributes work on C++ templates])
515 dnl Check if the system has struct stat::st_mtim.
516 AC_CACHE_CHECK([for struct stat::st_mtim.],
517 [gold_cv_stat_st_mtim],
518 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
519 #include <sys/stat.h>
520 long bar() { struct stat s; return (long)(s.st_mtim.tv_sec + s.st_mtim.tv_sec);}
521 ]])], [gold_cv_stat_st_mtim=yes], [gold_cv_stat_st_mtim=no])])
522 if test "$gold_cv_stat_st_mtim" = "yes"; then
523 AC_DEFINE(HAVE_STAT_ST_MTIM, 1,
524 [Define if struct stat has a field st_mtim with timespec for mtime])
531 AC_OUTPUT(Makefile testsuite/Makefile po/Makefile.in:po/Make-in)