1 dnl Process this file with autoconf to produce a configure script.
6 AC_CONFIG_SRCDIR(gold.cc)
10 AM_INIT_AUTOMAKE([no-dist])
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, $sysroot_relocatable,
39 [Whether the system root can be relocated])
41 dnl For now threads are a configure time option.
42 AC_ARG_ENABLE([threads],
43 [ --enable-threads multi-threaded linking],
44 [case "${enableval}" in
45 yes | "") threads=yes ;;
50 if test "$threads" = "yes"; then
51 AC_DEFINE(ENABLE_THREADS, 1,
52 [Define to do multi-threaded linking])
54 AM_CONDITIONAL(THREADS, test "$threads" = "yes")
56 AC_ARG_ENABLE([plugins],
57 [ --enable-plugins linker plugins],
58 [case "${enableval}" in
59 yes | "") plugins=yes ;;
64 if test "$plugins" = "yes"; then
65 AC_DEFINE(ENABLE_PLUGINS, 1,
66 [Define to enable linker plugins])
68 AM_CONDITIONAL(PLUGINS, test "$plugins" = "yes")
70 AC_ARG_ENABLE([targets],
71 [ --enable-targets alternative target configurations],
72 [case "${enableval}" in
74 AC_MSG_ERROR([--enable-targets option must specify target names or 'all'])
80 enable_targets=$enableval
83 [# For now, enable all targets by default
87 # Canonicalize the enabled targets.
88 if test -n "$enable_targets"; then
89 for targ in `echo $enable_targets | sed -e 's/,/ /g'`; do
90 result=`$ac_config_sub $targ 2>/dev/null`
91 if test -n "$result"; then
92 canon_targets="$canon_targets $result"
94 # Permit unrecognized target names, like "all".
95 canon_targets="$canon_targets $targ"
100 # See which specific instantiations we need.
106 default_osabi=ELFOSABI_NONE
111 for targ in $target $canon_targets; do
112 if test "$targ" = "all"; then
119 . ${srcdir}/configure.tgt
121 if test "$targ_obj" = "UNKNOWN"; then
122 AC_MSG_ERROR("unsupported target $targ")
124 targetobjs="$targetobjs ${targ_obj}.\$(OBJEXT)"
125 if test "$targ_extra_obj" != ""; then
126 targetobjs="$targetobjs ${targ_extra_obj}.\$(OBJEXT)"
128 if test "$targ_size" = "32" -o "$targ_extra_size" = "32"; then
129 if test "$targ_big_endian" = "true" \
130 -o "$targ_extra_big_endian" = "true"; then
133 if test "$targ_big_endian" = "false" \
134 -o "$targ_extra_big_endian" = "false"; then
138 if test "$targ_size" = "64" -o "$targ_extra_size" = "64"; then
139 if test "$targ_big_endian" = "true" \
140 -o "$targ_extra_big_endian" = "true"; then
143 if test "$targ_big_endian" = "false" \
144 -o "$targ_extra_big_endian" = "false"; then
149 if test "$target" = "$targ"; then
150 default_machine=$targ_machine
151 default_size=$targ_size
152 default_big_endian=$targ_big_endian
153 default_osabi=$targ_osabi
155 AM_CONDITIONAL(DEFAULT_TARGET_ARM, test "$targ_obj" = "arm")
156 AM_CONDITIONAL(DEFAULT_TARGET_I386, test "$targ_obj" = "i386")
157 AM_CONDITIONAL(DEFAULT_TARGET_POWERPC, test "$targ_obj" = "powerpc")
158 AM_CONDITIONAL(DEFAULT_TARGET_SPARC, test "$targ_obj" = "sparc")
159 AM_CONDITIONAL(DEFAULT_TARGET_X86_64, test "$targ_obj" = "x86_64")
165 # Remove any duplicates.
167 for t in $targetobjs; do
175 if test -n "$targ_32_little"; then
176 AC_DEFINE(HAVE_TARGET_32_LITTLE, 1,
177 [Define to support 32-bit little-endian targets])
179 if test -n "$targ_32_big"; then
180 AC_DEFINE(HAVE_TARGET_32_BIG, 1,
181 [Define to support 32-bit big-endian targets])
183 if test -n "$targ_64_little"; then
184 AC_DEFINE(HAVE_TARGET_64_LITTLE, 1,
185 [Define to support 64-bit little-endian targets])
187 if test -n "$targ_64_big"; then
188 AC_DEFINE(HAVE_TARGET_64_BIG, 1,
189 [Define to support 64-bit big-endian targets])
192 if test -n "$all_targets"; then
193 TARGETOBJS='$(ALL_TARGETOBJS)'
195 TARGETOBJS="$targetobjs"
199 AC_DEFINE_UNQUOTED(GOLD_DEFAULT_MACHINE, $default_machine,
200 [Default machine code])
201 AC_DEFINE_UNQUOTED(GOLD_DEFAULT_SIZE, $default_size,
202 [Default size (32 or 64)])
203 AC_DEFINE_UNQUOTED(GOLD_DEFAULT_BIG_ENDIAN, $default_big_endian,
204 [Default big endian (true or false)])
205 AC_DEFINE_UNQUOTED(GOLD_DEFAULT_OSABI, $default_osabi,
206 [Default OSABI code])
217 ZW_GNU_GETTEXT_SISTER_DIR
224 AM_CONDITIONAL(NATIVE_LINKER,
225 test "x$target_alias" = "x" -o "x$host_alias" = "x$target_alias")
226 AM_CONDITIONAL(GCC, test "$GCC" = yes)
228 dnl Some architectures do not support taking pointers of functions
229 dnl defined in shared libraries except in -fPIC mode. We need to
230 dnl tell the unittest framework if we're compiling for one of those
231 dnl targets, so it doesn't try to run the tests that do that.
232 AM_CONDITIONAL(FN_PTRS_IN_SO_WITHOUT_PIC, [
240 dnl Test for gcc 4.1 or later. Full support for -mcmodel=medium is
241 dnl only available in gcc 4.1.
242 AC_CACHE_CHECK([for gcc >= 4.1], [gold_cv_prog_gcc41],
244 #if !defined __GNUC__
246 #elif __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 1)
249 ], [gold_cv_prog_gcc41=yes], [gold_cv_prog_gcc41=no])])
251 dnl Whether we can test -mcmodel=medium.
252 AM_CONDITIONAL(MCMODEL_MEDIUM,
253 [test "$target_cpu" = "x86_64" -a "$gold_cv_prog_gcc41" = "yes"])
255 dnl Test for __thread support.
256 AC_CACHE_CHECK([for thread support], [gold_cv_c_thread],
257 [AC_COMPILE_IFELSE([__thread int i = 1;],
258 [gold_cv_c_thread=yes], [gold_cv_c_thread=no])])
260 AM_CONDITIONAL(TLS, test "$gold_cv_c_thread" = "yes")
262 dnl On GNU/Linux TLS in static programs only works when using glibc
264 AC_CACHE_CHECK([for glibc >= 2.4], [gold_cv_lib_glibc24],
266 #include <features.h>
267 #if !defined __GLIBC__
269 #elif __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 4)
272 ], [gold_cv_lib_glibc24=yes], [gold_cv_lib_glibc24=no])])
274 AM_CONDITIONAL(STATIC_TLS, test "$gold_cv_lib_glibc24" = "yes")
276 dnl Test for #pragma omp threadprivate
277 AC_CACHE_CHECK([for omp support], [gold_cv_c_threadprivate],
278 [save_CFLAGS="$CFLAGS"
279 CFLAGS="$CFLAGS -fopenmp"
283 #pragma omp threadprivate (i)
284 ], [gold_cv_c_threadprivate=yes], [gold_cv_c_threadprivate=no])
285 CFLAGS="$save_CFLAGS"])
286 if test "$gold_cv_c_threadprivate" = "yes"; then
287 AC_DEFINE(HAVE_OMP_SUPPORT, 1,
288 [Define if compiler supports #pragma omp threadprivate])
290 AM_CONDITIONAL(OMP_SUPPORT, test "$gold_cv_c_threadprivate" = "yes")
292 dnl Test for the -ftls-dialect=gnu2 option.
293 save_CFLAGS="$CFLAGS"
294 CFLAGS="$CFLAGS -mtls-dialect=gnu2"
295 AC_COMPILE_IFELSE([int i;], [have_tls_gnu2=yes], [have_tls_gnu2=no])
296 CFLAGS="$save_CFLAGS"
297 AM_CONDITIONAL(TLS_GNU2_DIALECT, test "$have_tls_gnu2" = "yes")
299 dnl On GNU/Linux TLS descriptors are supported by the dynamic loader
300 dnl only with glibc 2.9 or later.
301 AC_CACHE_CHECK([for glibc >= 2.9], [gold_cv_lib_glibc29],
303 #include <features.h>
304 #if !defined __GLIBC__
306 #elif __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 9)
309 ], [gold_cv_lib_glibc29=yes], [gold_cv_lib_glibc29=no])])
311 AM_CONDITIONAL(TLS_DESCRIPTORS, test "$gold_cv_lib_glibc29" = "yes")
313 dnl Check whether the compiler supports constructor priorities in
314 dnl attributes, which were added in gcc 4.3.
315 AC_CACHE_CHECK([for constructor priorities], [gold_cv_c_conprio],
316 [AC_COMPILE_IFELSE([void f() __attribute__ ((constructor (1)));],
317 [gold_cv_c_conprio=yes], [gold_cv_c_conprio=no])])
319 AM_CONDITIONAL(CONSTRUCTOR_PRIORITY, test "$gold_cv_c_conprio" = "yes")
321 dnl Test for the -frandom-seed option.
322 AC_CACHE_CHECK([for -frandom-seed support], [gold_cv_c_random_seed],
323 [save_CFLAGS="$CFLAGS"
324 CFLAGS="$CFLAGS -frandom-seed=foo"
325 AC_COMPILE_IFELSE([int i;], [gold_cv_c_random_seed=yes],
326 [gold_cv_c_random_seed=no])
327 CFLAGS="$save_CFLAGS"])
328 if test "$gold_cv_c_random_seed" = "yes"; then
329 # In Makefile, '$@' will be expanded to be the name of the file
330 # being built, providing a unique seed for each file.
331 RANDOM_SEED_CFLAGS=-frandom-seed=\$@
333 AC_SUBST(RANDOM_SEED_CFLAGS)
337 WARN_CXXFLAGS=`echo ${WARN_CFLAGS} | sed -e 's/-Wstrict-prototypes//' -e 's/-Wmissing-prototypes//' -e 's/-Wshadow//'`
338 AC_SUBST(WARN_CXXFLAGS)
340 dnl Force support for large files by default. This may need to be
341 dnl host dependent. If build == host, we can check getconf LFS_CFLAGS.
342 LFS_CFLAGS="-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
345 AC_CHECK_FUNCS(chsize)
346 AC_REPLACE_FUNCS(pread ftruncate mremap ffsll)
348 # Link in zlib if we can. This allows us to write compressed sections.
349 AC_SEARCH_LIBS(zlibVersion, z, [AC_CHECK_HEADERS(zlib.h)])
350 AM_CONDITIONAL(HAVE_ZLIB, test "$ac_cv_search_zlibVersion" != "no")
352 dnl We have to check these in C, not C++, because autoconf generates
353 dnl tests which have no type information, and current glibc provides
354 dnl multiple declarations of functions like basename when compiling
356 AC_CHECK_DECLS([basename, ffs, asprintf, vasprintf, snprintf, vsnprintf, strverscmp])
360 AC_CHECK_HEADERS(tr1/unordered_set tr1/unordered_map)
361 AC_CHECK_HEADERS(ext/hash_map ext/hash_set)
362 AC_CHECK_HEADERS(byteswap.h)
363 AC_CHECK_FUNCS(mallinfo posix_fallocate readv sysconf times)
364 AC_CHECK_DECLS([basename, ffs, asprintf, vasprintf, snprintf, vsnprintf, strverscmp, strndup, memmem])
366 # Use of ::std::tr1::unordered_map::rehash causes undefined symbols
367 # at link time with some versions of GCC.
368 AC_CACHE_CHECK([whether ::std::tr1::unordered_map::rehash is usable.],
369 [gold_cv_unordered_map_rehash],
370 [AC_LINK_IFELSE([AC_LANG_PROGRAM([[
371 #include <tr1/unordered_map>
372 void bar() { ::std::tr1::unordered_map<int, int> x; x.rehash(10); }
373 ]])], [gold_cv_unordered_map_rehash=yes], [gold_cv_unordered_map_rehash=no])])
374 if test "$gold_cv_unordered_map_rehash" = "yes"; then
375 AC_DEFINE(HAVE_TR1_UNORDERED_MAP_REHASH, 1,
376 [Define if ::std::tr1::unordered_map::rehash is usable])
379 # gcc 4.3.0 doesn't recognize the printf attribute on a template
380 # function. Check for that. This is gcc bug 35546. This test can
381 # probably be removed after the bug has been fixed for a while.
382 AC_CACHE_CHECK([whether we can use attributes with template functions],
383 [gold_cv_template_attribute],
385 template<typename T> extern void foo(const char*, ...)
386 __attribute__ ((__format__ (__printf__, 1, 2)));
387 template<typename T> void foo(const char* format, ...) {}
388 void bar() { foo<int>("%s\n", "foo"); }
389 ], [gold_cv_template_attribute=yes], [gold_cv_template_attribute=no])])
390 if test "$gold_cv_template_attribute" = "yes"; then
391 AC_DEFINE(HAVE_TEMPLATE_ATTRIBUTES, 1,
392 [Define if attributes work on C++ templates])
395 dnl Check if the system has struct stat::st_mtim.
396 AC_CACHE_CHECK([for struct stat::st_mtim.],
397 [gold_cv_stat_st_mtim],
398 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
399 #include <sys/stat.h>
400 long bar() { struct stat s; return (long)(s.st_mtim.tv_sec + s.st_mtim.tv_sec);}
401 ]])], [gold_cv_stat_st_mtim=yes], [gold_cv_stat_st_mtim=no])])
402 if test "$gold_cv_stat_st_mtim" = "yes"; then
403 AC_DEFINE(HAVE_STAT_ST_MTIM, 1,
404 [Define if struct stat has a field st_mtim with timespec for mtime])
411 AC_OUTPUT(Makefile testsuite/Makefile po/Makefile.in:po/Make-in)