1 # configure.ac -- Backtrace configure script.
2 # Copyright (C) 2012-2018 Free Software Foundation, Inc.
4 # Redistribution and use in source and binary forms, with or without
5 # modification, are permitted provided that the following conditions are
8 # (1) Redistributions of source code must retain the above copyright
9 # notice, this list of conditions and the following disclaimer.
11 # (2) Redistributions in binary form must reproduce the above copyright
12 # notice, this list of conditions and the following disclaimer in
13 # the documentation and/or other materials provided with the
16 # (3) The name of the author may not be used to
17 # endorse or promote products derived from this software without
18 # specific prior written permission.
20 # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
21 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
22 # WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
23 # DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
24 # INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
25 # (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
26 # SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
28 # STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
29 # IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 # POSSIBILITY OF SUCH DAMAGE.
33 AC_INIT(package-unused, version-unused,, libbacktrace)
34 AC_CONFIG_SRCDIR(backtrace.h)
35 AC_CONFIG_HEADER(config.h)
37 if test -n "${with_target_subdir}"; then
38 AM_ENABLE_MULTILIB(, ..)
42 target_alias=${target_alias-$host_alias}
44 AC_USE_SYSTEM_EXTENSIONS
47 AC_SUBST(libtool_VERSION)
49 # 1.11.1: Require that version of automake.
50 # foreign: Don't require README, INSTALL, NEWS, etc.
51 # no-define: Don't define PACKAGE and VERSION.
52 # no-dependencies: Don't generate automatic dependencies.
53 # (because it breaks when using bootstrap-lean, since some of the
54 # headers are gone at "make install" time).
55 # -Wall: Issue all automake warnings.
56 # -Wno-portability: Don't warn about constructs supported by GNU make.
57 # (because GCC requires GNU make anyhow).
58 AM_INIT_AUTOMAKE([1.11.1 foreign no-dist no-define no-dependencies -Wall -Wno-portability])
62 AC_ARG_WITH(target-subdir,
63 [ --with-target-subdir=SUBDIR Configuring in a subdirectory for target])
65 # We must force CC to /not/ be precious variables; otherwise
66 # the wrong, non-multilib-adjusted value will be used in multilibs.
67 # As a side effect, we have to subst CFLAGS ourselves.
68 m4_rename([_AC_ARG_VAR_PRECIOUS],[backtrace_PRECIOUS])
69 m4_define([_AC_ARG_VAR_PRECIOUS],[])
71 m4_rename_force([backtrace_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
79 "") AC_MSG_ERROR([can't build without awk]) ;;
87 backtrace_supported=yes
89 if test -n "${with_target_subdir}"; then
90 # We are compiling a GCC library. We can assume that the unwind
92 BACKTRACE_FILE="backtrace.lo simple.lo"
94 AC_CHECK_HEADER([unwind.h],
95 [AC_CHECK_FUNC([_Unwind_Backtrace],
96 [BACKTRACE_FILE="backtrace.lo simple.lo"],
97 [BACKTRACE_FILE="nounwind.lo"
98 backtrace_supported=no])],
99 [BACKTRACE_FILE="nounwind.lo"
100 backtrace_supported=no])
102 AC_SUBST(BACKTRACE_FILE)
105 if test -n "${with_target_subdir}"; then
106 EXTRA_FLAGS="-funwind-tables -frandom-seed=\$@"
108 AC_CACHE_CHECK([for -funwind-tables option],
109 [libbacktrace_cv_c_unwind_tables],
110 [CFLAGS_hold="$CFLAGS"
111 CFLAGS="$CFLAGS -funwind-tables"
113 [AC_LANG_PROGRAM([static int f() { return 0; }], [return f();])],
114 [libbacktrace_cv_c_unwind_tables=yes],
115 [libbacktrace_cv_c_unwind_tables=no])
116 CFLAGS="$CFLAGS_hold"])
117 if test "$libbacktrace_cv_c_unwind_tables" = "yes"; then
118 EXTRA_FLAGS=-funwind-tables
120 AC_CACHE_CHECK([for -frandom-seed=string option],
121 [libbacktrace_cv_c_random_seed_string],
122 [CFLAGS_hold="$CFLAGS"
123 CFLAGS="$CFLAGS -frandom-seed=conftest.lo"
125 [AC_LANG_PROGRAM([], [return 0;])],
126 [libbacktrace_cv_c_random_seed_string=yes],
127 [libbacktrace_cv_c_random_seed_string=no])
128 CFLAGS="$CFLAGS_hold"])
129 if test "$libbacktrace_cv_c_random_seed_string" = "yes"; then
130 EXTRA_FLAGS="$EXTRA_FLAGS -frandom-seed=\$@"
134 if test -n "${with_target_subdir}"; then
135 # Add CET specific flags is Intel CET is enabled.
136 GCC_CET_FLAGS(CET_FLAGS)
137 EXTRA_FLAGS="$EXTRA_FLAGS $CET_FLAGS"
139 AC_SUBST(EXTRA_FLAGS)
141 ACX_PROG_CC_WARNING_OPTS([-W -Wall -Wwrite-strings -Wstrict-prototypes \
142 -Wmissing-prototypes -Wold-style-definition \
143 -Wmissing-format-attribute -Wcast-qual],
146 if test -n "${with_target_subdir}"; then
147 WARN_FLAGS="$WARN_FLAGS -Werror"
152 if test -n "${with_target_subdir}"; then
153 GCC_CHECK_UNWIND_GETIPINFO
155 ac_save_CFFLAGS="$CFLAGS"
156 CFLAGS="$CFLAGS -Werror-implicit-function-declaration"
157 AC_MSG_CHECKING([for _Unwind_GetIPInfo])
161 struct _Unwind_Context *context;
162 int ip_before_insn = 0;],
163 [return _Unwind_GetIPInfo (context, &ip_before_insn);])],
164 [have_unwind_getipinfo=yes], [have_unwind_getipinfo=no])
165 CFLAGS="$ac_save_CFLAGS"
166 AC_MSG_RESULT([$have_unwind_getipinfo])
167 if test "$have_unwind_getipinfo" = "yes"; then
168 AC_DEFINE(HAVE_GETIPINFO, 1, [Define if _Unwind_GetIPInfo is available.])
172 # Enable --enable-host-shared.
173 AC_ARG_ENABLE(host-shared,
174 [AS_HELP_STRING([--enable-host-shared],
175 [build host code as shared libraries])],
176 [PIC_FLAG=-fPIC], [PIC_FLAG=])
179 # Test for __sync support.
180 AC_CACHE_CHECK([__sync extensions],
181 [libbacktrace_cv_sys_sync],
182 [if test -n "${with_target_subdir}"; then
184 hppa*-*-hpux*) libbacktrace_cv_sys_sync=no ;;
185 *) libbacktrace_cv_sys_sync=yes ;;
189 [AC_LANG_PROGRAM([int i;],
190 [__sync_bool_compare_and_swap (&i, i, i);
191 __sync_lock_test_and_set (&i, 1);
192 __sync_lock_release (&i);])],
193 [libbacktrace_cv_sys_sync=yes],
194 [libbacktrace_cv_sys_sync=no])
196 BACKTRACE_SUPPORTS_THREADS=0
197 if test "$libbacktrace_cv_sys_sync" = "yes"; then
198 BACKTRACE_SUPPORTS_THREADS=1
199 AC_DEFINE([HAVE_SYNC_FUNCTIONS], 1,
200 [Define to 1 if you have the __sync functions])
202 AC_SUBST(BACKTRACE_SUPPORTS_THREADS)
204 # Test for __atomic support.
205 AC_CACHE_CHECK([__atomic extensions],
206 [libbacktrace_cv_sys_atomic],
207 [if test -n "${with_target_subdir}"; then
208 libbacktrace_cv_sys_atomic=yes
211 [AC_LANG_PROGRAM([int i;],
212 [__atomic_load_n (&i, __ATOMIC_ACQUIRE);
213 __atomic_store_n (&i, 1, __ATOMIC_RELEASE);])],
214 [libbacktrace_cv_sys_atomic=yes],
215 [libbacktrace_cv_sys_atomic=no])
217 if test "$libbacktrace_cv_sys_atomic" = "yes"; then
218 AC_DEFINE([HAVE_ATOMIC_FUNCTIONS], 1,
219 [Define to 1 if you have the __atomic functions])
222 # The library needs to be able to read the executable itself. Compile
223 # a file to determine the executable format. The awk script
224 # filetype.awk prints out the file type.
225 AC_CACHE_CHECK([output filetype],
226 [libbacktrace_cv_sys_filetype],
229 [AC_LANG_PROGRAM([int i;], [int j;])],
230 [filetype=`${AWK} -f $srcdir/filetype.awk conftest.$ac_objext`],
231 [AC_MSG_FAILURE([compiler failed])])
232 libbacktrace_cv_sys_filetype=$filetype])
234 # Match the file type to decide what files to compile.
236 backtrace_supports_data=yes
237 case "$libbacktrace_cv_sys_filetype" in
238 elf*) FORMAT_FILE="elf.lo" ;;
239 pecoff) FORMAT_FILE="pecoff.lo"
240 backtrace_supports_data=no
242 xcoff*) FORMAT_FILE="xcoff.lo"
243 backtrace_supports_data=no
245 *) AC_MSG_WARN([could not determine output file type])
246 FORMAT_FILE="unknown.lo"
247 backtrace_supported=no
250 AC_SUBST(FORMAT_FILE)
254 case "$libbacktrace_cv_sys_filetype" in
259 AC_DEFINE_UNQUOTED([BACKTRACE_ELF_SIZE], [$elfsize], [ELF size: 32 or 64])
263 case "$libbacktrace_cv_sys_filetype" in
264 xcoff32) xcoffsize=32 ;;
265 xcoff64) xcoffsize=64 ;;
268 AC_DEFINE_UNQUOTED([BACKTRACE_XCOFF_SIZE], [$xcoffsize], [XCOFF size: 32 or 64])
270 BACKTRACE_SUPPORTED=0
271 if test "$backtrace_supported" = "yes"; then
272 BACKTRACE_SUPPORTED=1
274 AC_SUBST(BACKTRACE_SUPPORTED)
276 BACKTRACE_SUPPORTS_DATA=0
277 if test "$backtrace_supports_data" = "yes"; then
278 BACKTRACE_SUPPORTS_DATA=1
280 AC_SUBST(BACKTRACE_SUPPORTS_DATA)
282 GCC_HEADER_STDINT(gstdint.h)
284 AC_CHECK_HEADERS(sys/mman.h)
285 if test "$ac_cv_header_sys_mman_h" = "no"; then
288 if test -n "${with_target_subdir}"; then
289 # When built as a GCC target library, we can't do a link test. We
290 # simply assume that if we have mman.h, we have mmap.
293 spu-*-*|*-*-msdosdjgpp)
294 # The SPU does not have mmap, but it has a sys/mman.h header file
295 # containing "mmap_eaddr" and the mmap flags, confusing the test.
296 # DJGPP also has sys/man.h, but no mmap
300 AC_CHECK_FUNC(mmap, [have_mmap=yes], [have_mmap=no])
303 if test "$have_mmap" = "no"; then
309 #include <sys/mman.h>
310 #if !defined(MAP_ANONYMOUS) && !defined(MAP_ANON)
311 #error no MAP_ANONYMOUS
313 ], [ALLOC_FILE=mmap.lo], [ALLOC_FILE=alloc.lo])
318 BACKTRACE_USES_MALLOC=0
319 if test "$ALLOC_FILE" = "alloc.lo"; then
320 BACKTRACE_USES_MALLOC=1
322 AC_SUBST(BACKTRACE_USES_MALLOC)
324 # Check for dl_iterate_phdr.
325 AC_CHECK_HEADERS(link.h)
326 if test "$ac_cv_header_link_h" = "no"; then
327 have_dl_iterate_phdr=no
329 if test -n "${with_target_subdir}"; then
330 # When built as a GCC target library, we can't do a link test.
331 AC_EGREP_HEADER([dl_iterate_phdr], [link.h], [have_dl_iterate_phdr=yes],
332 [have_dl_iterate_phdr=no])
335 # Avoid dl_iterate_phdr on Solaris 10, where it is in the
336 # header file but is only in -ldl.
337 have_dl_iterate_phdr=no ;;
340 AC_CHECK_FUNC([dl_iterate_phdr], [have_dl_iterate_phdr=yes],
341 [have_dl_iterate_phdr=no])
344 if test "$have_dl_iterate_phdr" = "yes"; then
345 AC_DEFINE(HAVE_DL_ITERATE_PHDR, 1, [Define if dl_iterate_phdr is available.])
348 # Check for loadquery.
349 AC_CHECK_HEADERS(sys/ldr.h)
350 if test "$ac_cv_header_sys_ldr_h" = "no"; then
353 if test -n "${with_target_subdir}"; then
354 # When built as a GCC target library, we can't do a link test.
355 AC_EGREP_HEADER([loadquery], [sys/ldr.h], [have_loadquery=yes],
358 AC_CHECK_FUNC([loadquery], [have_loadquery=yes],
362 if test "$have_loadquery" = "yes"; then
363 AC_DEFINE(HAVE_LOADQUERY, 1, [Define if AIX loadquery is available.])
366 # Check for the fcntl function.
367 if test -n "${with_target_subdir}"; then
369 *-*-mingw*) have_fcntl=no ;;
370 spu-*-*) have_fcntl=no ;;
374 AC_CHECK_FUNC(fcntl, [have_fcntl=yes], [have_fcntl=no])
376 if test "$have_fcntl" = "yes"; then
377 AC_DEFINE([HAVE_FCNTL], 1,
378 [Define to 1 if you have the fcntl function])
381 AC_CHECK_DECLS(strnlen)
382 AC_CHECK_FUNCS(lstat readlink)
384 # Check for getexecname function.
385 if test -n "${with_target_subdir}"; then
387 *-*-solaris2*) have_getexecname=yes ;;
388 *) have_getexecname=no ;;
391 AC_CHECK_FUNC(getexecname, [have_getexecname=yes], [have_getexecname=no])
393 if test "$have_getexecname" = "yes"; then
394 AC_DEFINE(HAVE_GETEXECNAME, 1, [Define if getexecname is available.])
397 # Check for the clock_gettime function.
398 AC_CHECK_FUNCS(clock_gettime)
400 # At least for glibc, clock_gettime is in librt. But don't
401 # pull that in if it still doesn't give us the function we want. This
402 # test is copied from libgomp, and modified to not link in -lrt as
403 # we're using this for test timing only.
404 if test "$ac_cv_func_clock_gettime" = no; then
405 AC_CHECK_LIB(rt, clock_gettime,
406 [CLOCK_GETTIME_LINK=-lrt
407 AC_DEFINE(HAVE_CLOCK_GETTIME, 1,
408 [Define to 1 if you have the `clock_gettime' function.])])
410 AC_SUBST(CLOCK_GETTIME_LINK)
412 dnl Test whether the compiler supports the -pthread option.
413 AC_CACHE_CHECK([whether -pthread is supported],
414 [libgo_cv_lib_pthread],
416 CFLAGS="$CFLAGS -pthread"
417 AC_COMPILE_IFELSE([[int i;]],
418 [libgo_cv_lib_pthread=yes],
419 [libgo_cv_lib_pthread=no])
420 CFLAGS=$CFLAGS_hold])
422 if test "$libgo_cv_lib_pthread" = yes; then
423 PTHREAD_CFLAGS=-pthread
425 AC_SUBST(PTHREAD_CFLAGS)
427 AM_CONDITIONAL(HAVE_PTHREAD, test "$libgo_cv_lib_pthread" = yes)
429 AC_CHECK_LIB([z], [compress],
430 [AC_DEFINE(HAVE_ZLIB, 1, [Define if -lz is available.])])
431 AM_CONDITIONAL(HAVE_ZLIB, test "$ac_cv_lib_z_compress" = yes)
433 dnl Test whether the linker supports the --compress_debug_sections option.
434 AC_CACHE_CHECK([whether --compress-debug-sections is supported],
435 [libgo_cv_ld_compress],
436 [LDFLAGS_hold=$LDFLAGS
437 LDFLAGS="$LDFLAGS -Wl,--compress-debug-sections=zlib-gnu"
438 AC_LINK_IFELSE([AC_LANG_PROGRAM(,)],
439 [libgo_cv_ld_compress=yes],
440 [libgo_cv_ld_compress=no])
441 LDFLAGS=$LDFLAGS_hold])
442 AM_CONDITIONAL(HAVE_COMPRESSED_DEBUG, test "$libgo_cv_ld_compress" = yes)
444 AC_ARG_VAR(OBJCOPY, [location of objcopy])
445 AC_CHECK_PROG(OBJCOPY, objcopy, objcopy,)
446 AC_CACHE_CHECK([whether objcopy supports debuglink],
447 [libbacktrace_cv_objcopy_debuglink],
448 [if test -n "${with_target_subdir}"; then
449 libbacktrace_cv_objcopy_debuglink=no
450 elif ${OBJCOPY} --add-gnu-debuglink=x /bin/ls /tmp/ls$$; then
452 libbacktrace_cv_objcopy_debuglink=yes
454 libbacktrace_cv_objcopy_debuglink=no
456 AM_CONDITIONAL(HAVE_OBJCOPY_DEBUGLINK, test "$libbacktrace_cv_objcopy_debuglink" = yes)
458 AC_CACHE_CHECK([whether tests can run],
459 [libbacktrace_cv_sys_native],
460 [AC_RUN_IFELSE([AC_LANG_PROGRAM([], [return 0;])],
461 [libbacktrace_cv_sys_native=yes],
462 [libbacktrace_cv_sys_native=no],
463 [libbacktrace_cv_sys_native=no])])
464 AM_CONDITIONAL(NATIVE, test "$libbacktrace_cv_sys_native" = "yes")
466 if test "${multilib}" = "yes"; then
467 multilib_arg="--enable-multilib"
472 AC_CONFIG_FILES(Makefile backtrace-supported.h)
474 # We need multilib support, but only if configuring for the target.
475 AC_CONFIG_COMMANDS([default],
476 [if test -n "$CONFIG_FILES"; then
477 if test -n "${with_target_subdir}"; then
478 # Multilibs need MULTISUBDIR defined correctly in certain makefiles so
479 # that multilib installs will end up installed in the correct place.
480 # The testsuite needs it for multilib-aware ABI baseline files.
481 # To work around this not being passed down from config-ml.in ->
482 # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually
483 # append it here. Only modify Makefiles that have just been created.
485 # Also, get rid of this simulated-VPATH thing that automake does.
487 s!`test -f '$<' || echo '$(srcdir)/'`!!
489 for i in $SUBDIRS; do
490 case $CONFIG_FILES in
492 #echo "Adding MULTISUBDIR to $i/Makefile"
493 sed -f vpsed $i/Makefile > tmp
494 grep '^MULTISUBDIR =' Makefile >> tmp
504 # Variables needed in config.status (file generation) which aren't already
505 # passed by autoconf.