1 # configure.ac -- Backtrace configure script.
2 # Copyright (C) 2012 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 "${with_target_subdir}"; then
84 # We are compiling a GCC library. We can assume that the unwind
86 AM_ENABLE_MULTILIB(, ..)
87 BACKTRACE_FILE="backtrace.lo simple.lo"
89 AC_CHECK_HEADER([unwind.h],
90 [AC_CHECK_FUNC([_Unwind_Backtrace],
91 [BACKTRACE_FILE="backtrace.lo simple.lo"],
92 [BACKTRACE_FILE="nounwind.lo"
93 backtrace_supported=no])],
94 [BACKTRACE_FILE="nounwind.lo"
95 backtrace_supported=no])
97 AC_SUBST(BACKTRACE_FILE)
100 if test "x$GCC" = "xyes"; then
101 EXTRA_FLAGS=-funwind-tables
103 AC_SUBST(EXTRA_FLAGS)
105 ACX_PROG_CC_WARNING_OPTS([-W -Wall -Wwrite-strings -Wstrict-prototypes \
106 -Wmissing-prototypes -Wold-style-definition \
107 -Wmissing-format-attribute -Wcast-qual],
110 if test "x$GCC" = "xyes"; then
111 WARN_FLAGS="$WARN_FLAGS -Werror"
116 if test -n "${with_target_subdir}"; then
117 GCC_CHECK_UNWIND_GETIPINFO
119 AC_CHECK_FUNC(_Unwind_GetIPInfo, [have_unwind_getipinfo=yes],
120 [have_unwind_getipinfo=no])
121 if test "$have_unwind_getipinfo" = "yes"; then
122 AC_DEFINE(HAVE_GETIPINFO, 1, [Define if _Unwind_GetIPInfo is available.])
126 # When building as a target library, shared libraries may want to link
127 # this in. We don't want to provide another shared library to
128 # complicate dependencies. Instead, we just compile with -fPIC.
130 if test -n "${with_target_subdir}"; then
135 # Test for __sync support.
136 AC_CACHE_CHECK([__sync extensions],
137 [libbacktrace_cv_sys_sync],
138 [if test -n "${with_target_subdir}"; then
139 libbacktrace_cv_sys_sync=yes
142 [AC_LANG_PROGRAM([int i;],
143 [__sync_bool_compare_and_swap (&i, i, i);
144 __sync_lock_test_and_set (&i, 1);
145 __sync_lock_release (&i);])],
146 [libbacktrace_cv_sys_sync=yes],
147 [libbacktrace_cv_sys_sync=no])
149 BACKTRACE_SUPPORTS_THREADS=0
150 if test "$libbacktrace_cv_sys_sync" = "yes"; then
151 BACKTRACE_SUPPORTS_THREADS=1
152 AC_DEFINE([HAVE_SYNC_FUNCTIONS], 1,
153 [Define to 1 if you have the __sync functions])
155 AC_SUBST(BACKTRACE_SUPPORTS_THREADS)
157 # The library needs to be able to read the executable itself. Compile
158 # a file to determine the executable format. The awk script
159 # filetype.awk prints out the file type.
160 AC_CACHE_CHECK([output filetype],
161 [libbacktrace_cv_sys_filetype],
164 [AC_LANG_PROGRAM([int i;], [int j;])],
165 [filetype=`${AWK} -f $srcdir/filetype.awk conftest.$ac_objext`],
166 [AC_MSG_FAILURE([compiler failed])])
167 libbacktrace_cv_sys_filetype=$filetype])
169 # Match the file type to decide what files to compile.
171 case "$libbacktrace_cv_sys_filetype" in
172 elf*) FORMAT_FILE="elf.lo" ;;
173 *) AC_MSG_WARN([could not determine output file type])
174 FORMAT_FILE="unknown.lo"
175 backtrace_supported=no
178 AC_SUBST(FORMAT_FILE)
182 case "$libbacktrace_cv_sys_filetype" in
186 AC_DEFINE_UNQUOTED([BACKTRACE_ELF_SIZE], [$elfsize], [ELF size: 32 or 64])
188 BACKTRACE_SUPPORTED=0
189 if test "$backtrace_supported" = "yes"; then
190 BACKTRACE_SUPPORTED=1
192 AC_SUBST(BACKTRACE_SUPPORTED)
194 GCC_HEADER_STDINT(gstdint.h)
196 AC_CHECK_HEADERS(sys/mman.h)
197 if test "$ac_cv_header_sys_mman_h" = "no"; then
200 if test -n "${with_target_subdir}"; then
201 # When built as a GCC target library, we can't do a link test. We
202 # simply assume that if we have mman.h, we have mmap.
205 AC_CHECK_FUNC(mmap, [have_mmap=yes], [have_mmap=no])
208 if test "$have_mmap" = "no"; then
214 #include <sys/mman.h>
215 #if !defined(MAP_ANONYMOUS) && !defined(MAP_ANON)
216 #error no MAP_ANONYMOUS
218 ], [ALLOC_FILE=mmap.lo], [ALLOC_FILE=alloc.lo])
223 BACKTRACE_USES_MALLOC=0
224 if test "$ALLOC_FILE" = "alloc.lo"; then
225 BACKTRACE_USES_MALLOC=1
227 AC_SUBST(BACKTRACE_USES_MALLOC)
229 # Check for the fcntl function.
230 if test -n "${with_target_subdir}"; then
232 *-*-mingw*) have_fcntl=no ;;
236 AC_CHECK_FUNC(fcntl, [have_fcntl=yes], [have_fcntl=no])
238 if test "$have_fcntl" = "yes"; then
239 AC_DEFINE([HAVE_FCNTL], 1,
240 [Define to 1 if you have the fcntl function])
243 AC_CHECK_DECLS(strnlen)
245 AC_CACHE_CHECK([whether tests can run],
246 [libbacktrace_cv_sys_native],
247 [AC_RUN_IFELSE([AC_LANG_PROGRAM([], [return 0;])],
248 [libbacktrace_cv_sys_native=yes],
249 [libbacktrace_cv_sys_native=no],
250 [libbacktrace_cv_sys_native=no])])
251 AM_CONDITIONAL(NATIVE, test "$libbacktrace_cv_sys_native" = "yes")
253 if test "${multilib}" = "yes"; then
254 multilib_arg="--enable-multilib"
259 AC_CONFIG_FILES(Makefile backtrace-supported.h)
261 # We need multilib support, but only if configuring for the target.
262 AC_CONFIG_COMMANDS([default],
263 [if test -n "$CONFIG_FILES"; then
264 if test -n "${with_target_subdir}"; then
265 # Multilibs need MULTISUBDIR defined correctly in certain makefiles so
266 # that multilib installs will end up installed in the correct place.
267 # The testsuite needs it for multilib-aware ABI baseline files.
268 # To work around this not being passed down from config-ml.in ->
269 # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually
270 # append it here. Only modify Makefiles that have just been created.
272 # Also, get rid of this simulated-VPATH thing that automake does.
274 s!`test -f '$<' || echo '$(srcdir)/'`!!
276 for i in $SUBDIRS; do
277 case $CONFIG_FILES in
279 #echo "Adding MULTISUBDIR to $i/Makefile"
280 sed -f vpsed $i/Makefile > tmp
281 grep '^MULTISUBDIR =' Makefile >> tmp
291 # Variables needed in config.status (file generation) which aren't already
292 # passed by autoconf.