PR ld/11384
[binutils.git] / gold / configure.ac
blobf184d4b29def3f4eca93a61c324c27f367f3e782
1 dnl Process this file with autoconf to produce a configure script.
3 AC_PREREQ(2.59)
5 AC_INIT(gold, 0.1)
6 AC_CONFIG_SRCDIR(gold.cc)
8 AC_CANONICAL_TARGET
10 AM_INIT_AUTOMAKE
12 AM_CONFIG_HEADER(config.h:config.in)
14 AC_ARG_WITH(sysroot,
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 "$sysroot" = "no"; then
21   sysroot=
24 sysroot_relocatable=0
25 if test -n "$sysroot"; then
26   case "sysroot" in
27     "${prefix}" | "${prefix}/"* | \
28     "${exec_prefix}" | "${exec_prefix}/"* | \
29     '${prefix}' | '${prefix}/'*| \
30     '${exec_prefix}' | '${exec_prefix}/'*)
31       sysroot_relocatable=1
32       ;;
33   esac
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 ;;
46   no) threads=no ;;
47   *) threads=yes ;;
48  esac],
49 [threads=no])
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 "${enableval}" in
59   yes | "") plugins=yes ;;
60   no) plugins=no ;;
61   *) plugins=yes ;;
62  esac],
63 [plugins=no])
64 if test "$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
73   yes | "")
74     AC_MSG_ERROR([--enable-targets option must specify target names or 'all'])
75     ;;
76   no)
77     enable_targets=
78     ;;
79   *)
80     enable_targets=$enableval
81     ;;
82 esac],
83 [# For now, enable all targets by default
84  enable_targets=all
87 # Canonicalize the enabled targets.
88 if test -n "$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 $result"
93     else
94       # Permit unrecognized target names, like "all".
95       canon_targets="$canon_targets $targ"
96     fi
97   done
100 # See which specific instantiations we need.
101 targetobjs=
102 all_targets=
103 default_machine=
104 default_size=
105 default_big_endian=
106 default_osabi=ELFOSABI_NONE
107 targ_32_little=
108 targ_32_big=
109 targ_64_little=
110 targ_64_big=
111 for targ in $target $canon_targets; do
112   if test "$targ" = "all"; then
113     targ_32_little=yes
114     targ_32_big=yes
115     targ_64_little=yes
116     targ_64_big=yes
117     all_targets=yes
118   else
119     . ${srcdir}/configure.tgt
121     if test "$targ_obj" = "UNKNOWN"; then
122       AC_MSG_ERROR("unsupported target $targ")
123     else
124       targetobjs="$targetobjs ${targ_obj}.\$(OBJEXT)"
125       if test "$targ_extra_obj" != ""; then
126         targetobjs="$targetobjs ${targ_extra_obj}.\$(OBJEXT)"
127       fi
128       if test "$targ_size" = "32" -o "$targ_extra_size" = "32"; then
129           if test "$targ_big_endian" = "true" \
130               -o "$targ_extra_big_endian" = "true"; then
131               targ_32_big=yes
132           fi
133           if test "$targ_big_endian" = "false" \
134               -o "$targ_extra_big_endian" = "false"; then
135               targ_32_little=yes
136           fi
137       fi
138       if test "$targ_size" = "64" -o "$targ_extra_size" = "64"; then
139           if test "$targ_big_endian" = "true" \
140               -o "$targ_extra_big_endian" = "true"; then
141               targ_64_big=yes
142           fi
143           if test "$targ_big_endian" = "false" \
144               -o "$targ_extra_big_endian" = "false"; then
145               targ_64_little=yes
146           fi
147       fi
149       if test "$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")
160       fi
161     fi
162   fi
163 done
165 # Remove any duplicates.
166 to=""
167 for t in $targetobjs; do
168   case " $to " in
169   *" $t "*) ;;
170   *) to="$to $t" ;;
171   esac
172 done
173 targetobjs=$to
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)'
194 else
195   TARGETOBJS="$targetobjs"
197 AC_SUBST(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, $default_osabi,
206                    [Default OSABI code])
208 AC_PROG_CC
209 AC_PROG_CXX
210 AC_PROG_YACC
211 AC_PROG_RANLIB
212 AC_PROG_INSTALL
213 AC_PROG_LN_S
215 AC_GNU_SOURCE
217 ZW_GNU_GETTEXT_SISTER_DIR
218 AM_PO_SUBDIRS
220 AC_C_BIGENDIAN
222 AC_EXEEXT
224 AM_CONDITIONAL(NATIVE_LINKER,
225   test "x$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, [
233   case $target_cpu in
234     i?86) true;;
235     x86_64) false;;
236     sparc64) false;;
237     *) true;;
238   esac])
240 dnl Test for gcc 4.1 or later.  Full support for -mcmodel=medium is
241 dnl only available in gcc 4.1.
242 AC_CACHE_CHECK([for gcc >= 4.1], [gold_cv_prog_gcc41],
243 [AC_COMPILE_IFELSE([
244 #if !defined __GNUC__
245 error
246 #elif __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 1)
247 error
248 #endif
249 ], [gold_cv_prog_gcc41=yes], [gold_cv_prog_gcc41=no])])
251 dnl Whether we can test -mcmodel=medium.
252 AM_CONDITIONAL(MCMODEL_MEDIUM,
253 [test "$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
263 dnl 2.4 or later.
264 AC_CACHE_CHECK([for glibc >= 2.4], [gold_cv_lib_glibc24],
265 [AC_COMPILE_IFELSE([
266 #include <features.h>
267 #if !defined __GLIBC__
268 error
269 #elif __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 4)
270 error
271 #endif
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="$CFLAGS -fopenmp"
280 AC_COMPILE_IFELSE([
281 #include <omp.h>
282 int i;
283 #pragma omp threadprivate (i)
284 ], [gold_cv_c_threadprivate=yes], [gold_cv_c_threadprivate=no])
285 CFLAGS="$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],
302 [AC_COMPILE_IFELSE([
303 #include <features.h>
304 #if !defined __GLIBC__
305 error
306 #elif __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 9)
307 error
308 #endif
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)
335 AM_BINUTILS_WARNINGS
337 WARN_CXXFLAGS=`echo ${WARN_CFLAGS} | sed -e 's/-Wstrict-prototypes//' -e 's/-Wmissing-prototypes//' -e 's/-Wshadow//'`
338 AC_SUBST(WARN_CXXFLAGS)
340 dnl Force support for large files by default.  This may need to be
341 dnl host dependent.  If build == host, we can check getconf LFS_CFLAGS.
342 LFS_CFLAGS="-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
343 AC_SUBST(LFS_CFLAGS)
345 AC_CHECK_FUNCS(chsize)
346 AC_REPLACE_FUNCS(pread ftruncate mremap ffsll)
348 # Link in zlib if we can.  This allows us to write compressed sections.
349 AC_SEARCH_LIBS(zlibVersion, z, [AC_CHECK_HEADERS(zlib.h)])
350 AM_CONDITIONAL(HAVE_ZLIB, test "$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
355 dnl with C++.
356 AC_CHECK_DECLS([basename, ffs, asprintf, vasprintf, snprintf, vsnprintf, strverscmp])
358 AC_LANG_PUSH(C++)
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 "$gold_cv_unordered_map_rehash" = "yes"; then
375   AC_DEFINE(HAVE_TR1_UNORDERED_MAP_REHASH, 1,
376             [Define if ::std::tr1::unordered_map::rehash is usable])
379 # gcc 4.3.0 doesn't recognize the printf attribute on a template
380 # function.  Check for that.  This is gcc bug 35546.  This test can
381 # probably be removed after the bug has been fixed for a while.
382 AC_CACHE_CHECK([whether we can use attributes with template functions],
383 [gold_cv_template_attribute],
384 [AC_COMPILE_IFELSE([
385 template<typename T> extern void foo(const char*, ...)
386   __attribute__ ((__format__ (__printf__, 1, 2)));
387 template<typename T> void foo(const char* format, ...) {}
388 void bar() { foo<int>("%s\n", "foo"); }
389 ], [gold_cv_template_attribute=yes], [gold_cv_template_attribute=no])])
390 if test "$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])
407 AC_LANG_POP(C++)
409 AM_MAINTAINER_MODE
411 AC_OUTPUT(Makefile testsuite/Makefile po/Makefile.in:po/Make-in)