1 # configure.ac -- Backtrace configure script.
2 # Copyright (C) 2012-2015 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-$host_alias}
44 AC_USE_SYSTEM_EXTENSIONS
47 AC_SUBST(libtool_VERSION)
49 # 1.11.1: Require that version of automake.
50 # foreign: Don't require README, INSTALL, NEWS, etc.
51 # no-define: Don't define PACKAGE and VERSION.
52 # no-dependencies: Don't generate automatic dependencies.
53 # (because it breaks when using bootstrap-lean, since some of the
54 # headers are gone at "make install" time).
55 # -Wall: Issue all automake warnings.
56 # -Wno-portability: Don't warn about constructs supported by GNU make.
57 # (because GCC requires GNU make anyhow).
58 AM_INIT_AUTOMAKE([1.11.1 foreign no-dist no-define no-dependencies -Wall -Wno-portability])
62 AC_ARG_WITH(target-subdir,
63 [ --with-target-subdir=SUBDIR Configuring in a subdirectory for target])
65 # We must force CC to /not/ be precious variables; otherwise
66 # the wrong, non-multilib-adjusted value will be used in multilibs.
67 # As a side effect, we have to subst CFLAGS ourselves.
68 m4_rename([_AC_ARG_VAR_PRECIOUS],[backtrace_PRECIOUS])
69 m4_define([_AC_ARG_VAR_PRECIOUS],[])
71 m4_rename_force([backtrace_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
79 "") AC_MSG_ERROR([can't build without awk]) ;;
82 LT_INIT([disable-shared])
85 backtrace_supported=yes
87 if test -n "${with_target_subdir}"; then
88 # We are compiling a GCC library. We can assume that the unwind
90 BACKTRACE_FILE="backtrace.lo simple.lo"
92 AC_CHECK_HEADER([unwind.h],
93 [AC_CHECK_FUNC([_Unwind_Backtrace],
94 [BACKTRACE_FILE="backtrace.lo simple.lo"],
95 [BACKTRACE_FILE="nounwind.lo"
96 backtrace_supported=no])],
97 [BACKTRACE_FILE="nounwind.lo"
98 backtrace_supported=no])
100 AC_SUBST(BACKTRACE_FILE)
103 if test -n "${with_target_subdir}"; then
104 EXTRA_FLAGS="-funwind-tables -frandom-seed=\$@"
106 AC_CACHE_CHECK([for -funwind-tables option],
107 [libbacktrace_cv_c_unwind_tables],
108 [CFLAGS_hold="$CFLAGS"
109 CFLAGS="$CFLAGS -funwind-tables"
111 [AC_LANG_PROGRAM([static int f() { return 0; }], [return f();])],
112 [libbacktrace_cv_c_unwind_tables=yes],
113 [libbacktrace_cv_c_unwind_tables=no])
114 CFLAGS="$CFLAGS_hold"])
115 if test "$libbacktrace_cv_c_unwind_tables" = "yes"; then
116 EXTRA_FLAGS=-funwind-tables
118 AC_CACHE_CHECK([for -frandom-seed=string option],
119 [libbacktrace_cv_c_random_seed_string],
120 [CFLAGS_hold="$CFLAGS"
121 CFLAGS="$CFLAGS -frandom-seed=conftest.lo"
123 [AC_LANG_PROGRAM([], [return 0;])],
124 [libbacktrace_cv_c_random_seed_string=yes],
125 [libbacktrace_cv_c_random_seed_string=no])
126 CFLAGS="$CFLAGS_hold"])
127 if test "$libbacktrace_cv_c_random_seed_string" = "yes"; then
128 EXTRA_FLAGS="$EXTRA_FLAGS -frandom-seed=\$@"
131 AC_SUBST(EXTRA_FLAGS)
133 ACX_PROG_CC_WARNING_OPTS([-W -Wall -Wwrite-strings -Wstrict-prototypes \
134 -Wmissing-prototypes -Wold-style-definition \
135 -Wmissing-format-attribute -Wcast-qual],
138 if test -n "${with_target_subdir}"; then
139 WARN_FLAGS="$WARN_FLAGS -Werror"
144 if test -n "${with_target_subdir}"; then
145 GCC_CHECK_UNWIND_GETIPINFO
147 ac_save_CFFLAGS="$CFLAGS"
148 CFLAGS="$CFLAGS -Werror-implicit-function-declaration"
149 AC_MSG_CHECKING([for _Unwind_GetIPInfo])
153 struct _Unwind_Context *context;
154 int ip_before_insn = 0;],
155 [return _Unwind_GetIPInfo (context, &ip_before_insn);])],
156 [have_unwind_getipinfo=yes], [have_unwind_getipinfo=no])
157 CFLAGS="$ac_save_CFLAGS"
158 AC_MSG_RESULT([$have_unwind_getipinfo])
159 if test "$have_unwind_getipinfo" = "yes"; then
160 AC_DEFINE(HAVE_GETIPINFO, 1, [Define if _Unwind_GetIPInfo is available.])
164 # When building as a target library, shared libraries may want to link
165 # this in. We don't want to provide another shared library to
166 # complicate dependencies. Instead, we just compile with -fPIC.
168 if test -n "${with_target_subdir}"; then
171 # Similarly, use -fPIC with --enable-host-shared:
172 AC_ARG_ENABLE(host-shared,
173 [AS_HELP_STRING([--enable-host-shared],
174 [build host code as shared libraries])],
175 [PIC_FLAG=-fPIC], [])
178 # Test for __sync support.
179 AC_CACHE_CHECK([__sync extensions],
180 [libbacktrace_cv_sys_sync],
181 [if test -n "${with_target_subdir}"; then
182 libbacktrace_cv_sys_sync=yes
185 [AC_LANG_PROGRAM([int i;],
186 [__sync_bool_compare_and_swap (&i, i, i);
187 __sync_lock_test_and_set (&i, 1);
188 __sync_lock_release (&i);])],
189 [libbacktrace_cv_sys_sync=yes],
190 [libbacktrace_cv_sys_sync=no])
192 BACKTRACE_SUPPORTS_THREADS=0
193 if test "$libbacktrace_cv_sys_sync" = "yes"; then
194 BACKTRACE_SUPPORTS_THREADS=1
195 AC_DEFINE([HAVE_SYNC_FUNCTIONS], 1,
196 [Define to 1 if you have the __sync functions])
198 AC_SUBST(BACKTRACE_SUPPORTS_THREADS)
200 # Test for __atomic support.
201 AC_CACHE_CHECK([__atomic extensions],
202 [libbacktrace_cv_sys_atomic],
203 [if test -n "${with_target_subdir}"; then
204 libbacktrace_cv_sys_atomic=yes
207 [AC_LANG_PROGRAM([int i;],
208 [__atomic_load_n (&i, __ATOMIC_ACQUIRE);
209 __atomic_store_n (&i, 1, __ATOMIC_RELEASE);])],
210 [libbacktrace_cv_sys_atomic=yes],
211 [libbacktrace_cv_sys_atomic=no])
213 if test "$libbacktrace_cv_sys_atomic" = "yes"; then
214 AC_DEFINE([HAVE_ATOMIC_FUNCTIONS], 1,
215 [Define to 1 if you have the __atomic functions])
218 # The library needs to be able to read the executable itself. Compile
219 # a file to determine the executable format. The awk script
220 # filetype.awk prints out the file type.
221 AC_CACHE_CHECK([output filetype],
222 [libbacktrace_cv_sys_filetype],
225 [AC_LANG_PROGRAM([int i;], [int j;])],
226 [filetype=`${AWK} -f $srcdir/filetype.awk conftest.$ac_objext`],
227 [AC_MSG_FAILURE([compiler failed])])
228 libbacktrace_cv_sys_filetype=$filetype])
230 # Match the file type to decide what files to compile.
232 case "$libbacktrace_cv_sys_filetype" in
233 elf*) FORMAT_FILE="elf.lo" ;;
234 *) AC_MSG_WARN([could not determine output file type])
235 FORMAT_FILE="unknown.lo"
236 backtrace_supported=no
239 AC_SUBST(FORMAT_FILE)
243 case "$libbacktrace_cv_sys_filetype" in
247 AC_DEFINE_UNQUOTED([BACKTRACE_ELF_SIZE], [$elfsize], [ELF size: 32 or 64])
249 BACKTRACE_SUPPORTED=0
250 if test "$backtrace_supported" = "yes"; then
251 BACKTRACE_SUPPORTED=1
253 AC_SUBST(BACKTRACE_SUPPORTED)
255 GCC_HEADER_STDINT(gstdint.h)
257 AC_CHECK_HEADERS(sys/mman.h)
258 if test "$ac_cv_header_sys_mman_h" = "no"; then
261 if test -n "${with_target_subdir}"; then
262 # When built as a GCC target library, we can't do a link test. We
263 # simply assume that if we have mman.h, we have mmap.
266 AC_CHECK_FUNC(mmap, [have_mmap=yes], [have_mmap=no])
269 if test "$have_mmap" = "no"; then
275 #include <sys/mman.h>
276 #if !defined(MAP_ANONYMOUS) && !defined(MAP_ANON)
277 #error no MAP_ANONYMOUS
279 ], [ALLOC_FILE=mmap.lo], [ALLOC_FILE=alloc.lo])
284 BACKTRACE_USES_MALLOC=0
285 if test "$ALLOC_FILE" = "alloc.lo"; then
286 BACKTRACE_USES_MALLOC=1
288 AC_SUBST(BACKTRACE_USES_MALLOC)
290 # Check for dl_iterate_phdr.
291 AC_CHECK_HEADERS(link.h)
292 if test "$ac_cv_header_link_h" = "no"; then
293 have_dl_iterate_phdr=no
295 if test -n "${with_target_subdir}"; then
296 # When built as a GCC target library, we can't do a link test.
297 AC_EGREP_HEADER([dl_iterate_phdr], [link.h], [have_dl_iterate_phdr=yes],
298 [have_dl_iterate_phdr=no])
301 # Avoid dl_iterate_phdr on Solaris 10, where it is in the
302 # header file but is only in -ldl.
303 have_dl_iterate_phdr=no ;;
306 AC_CHECK_FUNC([dl_iterate_phdr], [have_dl_iterate_phdr=yes],
307 [have_dl_iterate_phdr=no])
310 if test "$have_dl_iterate_phdr" = "yes"; then
311 AC_DEFINE(HAVE_DL_ITERATE_PHDR, 1, [Define if dl_iterate_phdr is available.])
314 # Check for the fcntl function.
315 if test -n "${with_target_subdir}"; then
317 *-*-mingw*) have_fcntl=no ;;
321 AC_CHECK_FUNC(fcntl, [have_fcntl=yes], [have_fcntl=no])
323 if test "$have_fcntl" = "yes"; then
324 AC_DEFINE([HAVE_FCNTL], 1,
325 [Define to 1 if you have the fcntl function])
328 AC_CHECK_DECLS(strnlen)
330 # Check for getexecname function.
331 if test -n "${with_target_subdir}"; then
333 *-*-solaris2*) have_getexecname=yes ;;
334 *) have_getexecname=no ;;
337 AC_CHECK_FUNC(getexecname, [have_getexecname=yes], [have_getexecname=no])
339 if test "$have_getexecname" = "yes"; then
340 AC_DEFINE(HAVE_GETEXECNAME, 1, [Define if getexecname is available.])
343 AC_CACHE_CHECK([whether tests can run],
344 [libbacktrace_cv_sys_native],
345 [AC_RUN_IFELSE([AC_LANG_PROGRAM([], [return 0;])],
346 [libbacktrace_cv_sys_native=yes],
347 [libbacktrace_cv_sys_native=no],
348 [libbacktrace_cv_sys_native=no])])
349 AM_CONDITIONAL(NATIVE, test "$libbacktrace_cv_sys_native" = "yes")
351 if test "${multilib}" = "yes"; then
352 multilib_arg="--enable-multilib"
357 AC_CONFIG_FILES(Makefile backtrace-supported.h)
359 # We need multilib support, but only if configuring for the target.
360 AC_CONFIG_COMMANDS([default],
361 [if test -n "$CONFIG_FILES"; then
362 if test -n "${with_target_subdir}"; then
363 # Multilibs need MULTISUBDIR defined correctly in certain makefiles so
364 # that multilib installs will end up installed in the correct place.
365 # The testsuite needs it for multilib-aware ABI baseline files.
366 # To work around this not being passed down from config-ml.in ->
367 # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually
368 # append it here. Only modify Makefiles that have just been created.
370 # Also, get rid of this simulated-VPATH thing that automake does.
372 s!`test -f '$<' || echo '$(srcdir)/'`!!
374 for i in $SUBDIRS; do
375 case $CONFIG_FILES in
377 #echo "Adding MULTISUBDIR to $i/Makefile"
378 sed -f vpsed $i/Makefile > tmp
379 grep '^MULTISUBDIR =' Makefile >> tmp
389 # Variables needed in config.status (file generation) which aren't already
390 # passed by autoconf.