1 # configure.ac -- Backtrace configure script.
2 # Copyright (C) 2012-2014 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)
38 target_alias=${target_alias-$host_alias}
40 AC_USE_SYSTEM_EXTENSIONS
43 AC_SUBST(libtool_VERSION)
45 # 1.11.1: Require that version of automake.
46 # foreign: Don't require README, INSTALL, NEWS, etc.
47 # no-define: Don't define PACKAGE and VERSION.
48 # no-dependencies: Don't generate automatic dependencies.
49 # (because it breaks when using bootstrap-lean, since some of the
50 # headers are gone at "make install" time).
51 # -Wall: Issue all automake warnings.
52 # -Wno-portability: Don't warn about constructs supported by GNU make.
53 # (because GCC requires GNU make anyhow).
54 AM_INIT_AUTOMAKE([1.11.1 foreign no-dist no-define no-dependencies -Wall -Wno-portability])
58 AC_ARG_WITH(target-subdir,
59 [ --with-target-subdir=SUBDIR Configuring in a subdirectory for target])
61 # We must force CC to /not/ be precious variables; otherwise
62 # the wrong, non-multilib-adjusted value will be used in multilibs.
63 # As a side effect, we have to subst CFLAGS ourselves.
64 m4_rename([_AC_ARG_VAR_PRECIOUS],[backtrace_PRECIOUS])
65 m4_define([_AC_ARG_VAR_PRECIOUS],[])
67 m4_rename_force([backtrace_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
75 "") AC_MSG_ERROR([can't build without awk]) ;;
78 LT_INIT([disable-shared])
81 backtrace_supported=yes
83 if test -n "${with_target_subdir}"; then
84 # We are compiling a GCC library. We can assume that the unwind
86 AM_ENABLE_MULTILIB(, ..)
87 BACKTRACE_FILE="backtrace.lo simple.lo"
89 AC_CHECK_HEADER([unwind.h],
90 [AC_CHECK_FUNC([_Unwind_Backtrace],
91 [BACKTRACE_FILE="backtrace.lo simple.lo"],
92 [BACKTRACE_FILE="nounwind.lo"
93 backtrace_supported=no])],
94 [BACKTRACE_FILE="nounwind.lo"
95 backtrace_supported=no])
97 AC_SUBST(BACKTRACE_FILE)
100 if test -n "${with_target_subdir}"; then
101 EXTRA_FLAGS="-funwind-tables -frandom-seed=\$@"
103 AC_CACHE_CHECK([for -funwind-tables option],
104 [libbacktrace_cv_c_unwind_tables],
105 [CFLAGS_hold="$CFLAGS"
106 CFLAGS="$CFLAGS -funwind-tables"
108 [AC_LANG_PROGRAM([static int f() { return 0; }], [return f();])],
109 [libbacktrace_cv_c_unwind_tables=yes],
110 [libbacktrace_cv_c_unwind_tables=no])
111 CFLAGS="$CFLAGS_hold"])
112 if test "$libbacktrace_cv_c_unwind_tables" = "yes"; then
113 EXTRA_FLAGS=-funwind-tables
115 AC_CACHE_CHECK([for -frandom-seed=string option],
116 [libbacktrace_cv_c_random_seed_string],
117 [CFLAGS_hold="$CFLAGS"
118 CFLAGS="$CFLAGS -frandom-seed=conftest.lo"
120 [AC_LANG_PROGRAM([], [return 0;])],
121 [libbacktrace_cv_c_random_seed_string=yes],
122 [libbacktrace_cv_c_random_seed_string=no])
123 CFLAGS="$CFLAGS_hold"])
124 if test "$libbacktrace_cv_c_random_seed_string" = "yes"; then
125 EXTRA_FLAGS="$EXTRA_FLAGS -frandom-seed=\$@"
128 AC_SUBST(EXTRA_FLAGS)
130 ACX_PROG_CC_WARNING_OPTS([-W -Wall -Wwrite-strings -Wstrict-prototypes \
131 -Wmissing-prototypes -Wold-style-definition \
132 -Wmissing-format-attribute -Wcast-qual],
135 if test -n "${with_target_subdir}"; then
136 WARN_FLAGS="$WARN_FLAGS -Werror"
141 if test -n "${with_target_subdir}"; then
142 GCC_CHECK_UNWIND_GETIPINFO
144 ac_save_CFFLAGS="$CFLAGS"
145 CFLAGS="$CFLAGS -Werror-implicit-function-declaration"
146 AC_MSG_CHECKING([for _Unwind_GetIPInfo])
150 struct _Unwind_Context *context;
151 int ip_before_insn = 0;],
152 [return _Unwind_GetIPInfo (context, &ip_before_insn);])],
153 [have_unwind_getipinfo=yes], [have_unwind_getipinfo=no])
154 CFLAGS="$ac_save_CFLAGS"
155 AC_MSG_RESULT([$have_unwind_getipinfo])
156 if test "$have_unwind_getipinfo" = "yes"; then
157 AC_DEFINE(HAVE_GETIPINFO, 1, [Define if _Unwind_GetIPInfo is available.])
161 # When building as a target library, shared libraries may want to link
162 # this in. We don't want to provide another shared library to
163 # complicate dependencies. Instead, we just compile with -fPIC.
165 if test -n "${with_target_subdir}"; then
168 # Similarly, use -fPIC with --enable-host-shared:
169 AC_ARG_ENABLE(host-shared,
170 [AS_HELP_STRING([--enable-host-shared],
171 [build host code as shared libraries])],
172 [PIC_FLAG=-fPIC], [])
175 # Test for __sync support.
176 AC_CACHE_CHECK([__sync extensions],
177 [libbacktrace_cv_sys_sync],
178 [if test -n "${with_target_subdir}"; then
179 libbacktrace_cv_sys_sync=yes
182 [AC_LANG_PROGRAM([int i;],
183 [__sync_bool_compare_and_swap (&i, i, i);
184 __sync_lock_test_and_set (&i, 1);
185 __sync_lock_release (&i);])],
186 [libbacktrace_cv_sys_sync=yes],
187 [libbacktrace_cv_sys_sync=no])
189 BACKTRACE_SUPPORTS_THREADS=0
190 if test "$libbacktrace_cv_sys_sync" = "yes"; then
191 BACKTRACE_SUPPORTS_THREADS=1
192 AC_DEFINE([HAVE_SYNC_FUNCTIONS], 1,
193 [Define to 1 if you have the __sync functions])
195 AC_SUBST(BACKTRACE_SUPPORTS_THREADS)
197 # Test for __atomic support.
198 AC_CACHE_CHECK([__atomic extensions],
199 [libbacktrace_cv_sys_atomic],
200 [if test -n "${with_target_subdir}"; then
201 libbacktrace_cv_sys_atomic=yes
204 [AC_LANG_PROGRAM([int i;],
205 [__atomic_load_n (&i, __ATOMIC_ACQUIRE);
206 __atomic_store_n (&i, 1, __ATOMIC_RELEASE);])],
207 [libbacktrace_cv_sys_atomic=yes],
208 [libbacktrace_cv_sys_atomic=no])
210 if test "$libbacktrace_cv_sys_atomic" = "yes"; then
211 AC_DEFINE([HAVE_ATOMIC_FUNCTIONS], 1,
212 [Define to 1 if you have the __atomic functions])
215 # The library needs to be able to read the executable itself. Compile
216 # a file to determine the executable format. The awk script
217 # filetype.awk prints out the file type.
218 AC_CACHE_CHECK([output filetype],
219 [libbacktrace_cv_sys_filetype],
222 [AC_LANG_PROGRAM([int i;], [int j;])],
223 [filetype=`${AWK} -f $srcdir/filetype.awk conftest.$ac_objext`],
224 [AC_MSG_FAILURE([compiler failed])])
225 libbacktrace_cv_sys_filetype=$filetype])
227 # Match the file type to decide what files to compile.
229 case "$libbacktrace_cv_sys_filetype" in
230 elf*) FORMAT_FILE="elf.lo" ;;
231 *) AC_MSG_WARN([could not determine output file type])
232 FORMAT_FILE="unknown.lo"
233 backtrace_supported=no
236 AC_SUBST(FORMAT_FILE)
240 case "$libbacktrace_cv_sys_filetype" in
244 AC_DEFINE_UNQUOTED([BACKTRACE_ELF_SIZE], [$elfsize], [ELF size: 32 or 64])
246 BACKTRACE_SUPPORTED=0
247 if test "$backtrace_supported" = "yes"; then
248 BACKTRACE_SUPPORTED=1
250 AC_SUBST(BACKTRACE_SUPPORTED)
252 GCC_HEADER_STDINT(gstdint.h)
254 AC_CHECK_HEADERS(sys/mman.h)
255 if test "$ac_cv_header_sys_mman_h" = "no"; then
258 if test -n "${with_target_subdir}"; then
259 # When built as a GCC target library, we can't do a link test. We
260 # simply assume that if we have mman.h, we have mmap.
263 AC_CHECK_FUNC(mmap, [have_mmap=yes], [have_mmap=no])
266 if test "$have_mmap" = "no"; then
272 #include <sys/mman.h>
273 #if !defined(MAP_ANONYMOUS) && !defined(MAP_ANON)
274 #error no MAP_ANONYMOUS
276 ], [ALLOC_FILE=mmap.lo], [ALLOC_FILE=alloc.lo])
281 BACKTRACE_USES_MALLOC=0
282 if test "$ALLOC_FILE" = "alloc.lo"; then
283 BACKTRACE_USES_MALLOC=1
285 AC_SUBST(BACKTRACE_USES_MALLOC)
287 # Check for dl_iterate_phdr.
288 AC_CHECK_HEADERS(link.h)
289 if test "$ac_cv_header_link_h" = "no"; then
290 have_dl_iterate_phdr=no
292 if test -n "${with_target_subdir}"; then
293 # When built as a GCC target library, we can't do a link test.
294 AC_EGREP_HEADER([dl_iterate_phdr], [link.h], [have_dl_iterate_phdr=yes],
295 [have_dl_iterate_phdr=no])
298 # Avoid dl_iterate_phdr on Solaris 10, where it is in the
299 # header file but is only in -ldl.
300 have_dl_iterate_phdr=no ;;
303 AC_CHECK_FUNC([dl_iterate_phdr], [have_dl_iterate_phdr=yes],
304 [have_dl_iterate_phdr=no])
307 if test "$have_dl_iterate_phdr" = "yes"; then
308 AC_DEFINE(HAVE_DL_ITERATE_PHDR, 1, [Define if dl_iterate_phdr is available.])
311 # Check for the fcntl function.
312 if test -n "${with_target_subdir}"; then
314 *-*-mingw*) have_fcntl=no ;;
318 AC_CHECK_FUNC(fcntl, [have_fcntl=yes], [have_fcntl=no])
320 if test "$have_fcntl" = "yes"; then
321 AC_DEFINE([HAVE_FCNTL], 1,
322 [Define to 1 if you have the fcntl function])
325 AC_CHECK_DECLS(strnlen)
327 # Check for getexecname function.
328 if test -n "${with_target_subdir}"; then
330 *-*-solaris2*) have_getexecname=yes ;;
331 *) have_getexecname=no ;;
334 AC_CHECK_FUNC(getexecname, [have_getexecname=yes], [have_getexecname=no])
336 if test "$have_getexecname" = "yes"; then
337 AC_DEFINE(HAVE_GETEXECNAME, 1, [Define if getexecname is available.])
340 AC_CACHE_CHECK([whether tests can run],
341 [libbacktrace_cv_sys_native],
342 [AC_RUN_IFELSE([AC_LANG_PROGRAM([], [return 0;])],
343 [libbacktrace_cv_sys_native=yes],
344 [libbacktrace_cv_sys_native=no],
345 [libbacktrace_cv_sys_native=no])])
346 AM_CONDITIONAL(NATIVE, test "$libbacktrace_cv_sys_native" = "yes")
348 if test "${multilib}" = "yes"; then
349 multilib_arg="--enable-multilib"
354 AC_CONFIG_FILES(Makefile backtrace-supported.h)
356 # We need multilib support, but only if configuring for the target.
357 AC_CONFIG_COMMANDS([default],
358 [if test -n "$CONFIG_FILES"; then
359 if test -n "${with_target_subdir}"; then
360 # Multilibs need MULTISUBDIR defined correctly in certain makefiles so
361 # that multilib installs will end up installed in the correct place.
362 # The testsuite needs it for multilib-aware ABI baseline files.
363 # To work around this not being passed down from config-ml.in ->
364 # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually
365 # append it here. Only modify Makefiles that have just been created.
367 # Also, get rid of this simulated-VPATH thing that automake does.
369 s!`test -f '$<' || echo '$(srcdir)/'`!!
371 for i in $SUBDIRS; do
372 case $CONFIG_FILES in
374 #echo "Adding MULTISUBDIR to $i/Makefile"
375 sed -f vpsed $i/Makefile > tmp
376 grep '^MULTISUBDIR =' Makefile >> tmp
386 # Variables needed in config.status (file generation) which aren't already
387 # passed by autoconf.