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ecd3459e 1# configure.ac -- Backtrace configure script.
d353bf18 2# Copyright (C) 2012-2015 Free Software Foundation, Inc.
ecd3459e 3
4# Redistribution and use in source and binary forms, with or without
5# modification, are permitted provided that the following conditions are
6# met:
7
8# (1) Redistributions of source code must retain the above copyright
9# notice, this list of conditions and the following disclaimer.
10
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
14# distribution.
15
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.
19
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.
31
32AC_PREREQ(2.64)
33AC_INIT(package-unused, version-unused,, libbacktrace)
34AC_CONFIG_SRCDIR(backtrace.h)
35AC_CONFIG_HEADER(config.h)
36
8df488f9 37if test -n "${with_target_subdir}"; then
38 AM_ENABLE_MULTILIB(, ..)
39fi
40
ecd3459e 41AC_CANONICAL_SYSTEM
42target_alias=${target_alias-$host_alias}
43
30bd8e8b 44AC_USE_SYSTEM_EXTENSIONS
45
ecd3459e 46libtool_VERSION=1:0:0
47AC_SUBST(libtool_VERSION)
48
451b8929 49# 1.11.1: Require that version of automake.
50# foreign: Don't require README, INSTALL, NEWS, etc.
51# no-define: Don't define PACKAGE and VERSION.
52# no-dependencies: Don't generate automatic dependencies.
53# (because it breaks when using bootstrap-lean, since some of the
54# headers are gone at "make install" time).
55# -Wall: Issue all automake warnings.
56# -Wno-portability: Don't warn about constructs supported by GNU make.
57# (because GCC requires GNU make anyhow).
58AM_INIT_AUTOMAKE([1.11.1 foreign no-dist no-define no-dependencies -Wall -Wno-portability])
ecd3459e 59
60AM_MAINTAINER_MODE
61
62AC_ARG_WITH(target-subdir,
63[ --with-target-subdir=SUBDIR Configuring in a subdirectory for target])
64
65# We must force CC to /not/ be precious variables; otherwise
66# the wrong, non-multilib-adjusted value will be used in multilibs.
67# As a side effect, we have to subst CFLAGS ourselves.
68m4_rename([_AC_ARG_VAR_PRECIOUS],[backtrace_PRECIOUS])
69m4_define([_AC_ARG_VAR_PRECIOUS],[])
70AC_PROG_CC
71m4_rename_force([backtrace_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
72
73AC_SUBST(CFLAGS)
74
75AC_PROG_RANLIB
76
77AC_PROG_AWK
78case "$AWK" in
79"") AC_MSG_ERROR([can't build without awk]) ;;
80esac
81
d0724418 82LT_INIT
ecd3459e 83AM_PROG_LIBTOOL
84
85backtrace_supported=yes
86
87if test -n "${with_target_subdir}"; then
88 # We are compiling a GCC library. We can assume that the unwind
89 # library exists.
ecd3459e 90 BACKTRACE_FILE="backtrace.lo simple.lo"
91else
92 AC_CHECK_HEADER([unwind.h],
93 [AC_CHECK_FUNC([_Unwind_Backtrace],
94 [BACKTRACE_FILE="backtrace.lo simple.lo"],
95 [BACKTRACE_FILE="nounwind.lo"
96 backtrace_supported=no])],
97 [BACKTRACE_FILE="nounwind.lo"
98 backtrace_supported=no])
99fi
100AC_SUBST(BACKTRACE_FILE)
101
536b8dd3 102EXTRA_FLAGS=
ff2fe13c 103if test -n "${with_target_subdir}"; then
a7ebc02e 104 EXTRA_FLAGS="-funwind-tables -frandom-seed=\$@"
ff2fe13c 105else
106 AC_CACHE_CHECK([for -funwind-tables option],
107 [libbacktrace_cv_c_unwind_tables],
108 [CFLAGS_hold="$CFLAGS"
109 CFLAGS="$CFLAGS -funwind-tables"
110 AC_COMPILE_IFELSE(
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="$CFLAGS_hold"])
a7ebc02e 115 if test "$libbacktrace_cv_c_unwind_tables" = "yes"; then
116 EXTRA_FLAGS=-funwind-tables
117 fi
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"
122 AC_COMPILE_IFELSE(
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="$EXTRA_FLAGS -frandom-seed=\$@"
129 fi
536b8dd3 130fi
131AC_SUBST(EXTRA_FLAGS)
132
ecd3459e 133ACX_PROG_CC_WARNING_OPTS([-W -Wall -Wwrite-strings -Wstrict-prototypes \
134 -Wmissing-prototypes -Wold-style-definition \
135 -Wmissing-format-attribute -Wcast-qual],
136 [WARN_FLAGS])
137
47b4f489 138if test -n "${with_target_subdir}"; then
ecd3459e 139 WARN_FLAGS="$WARN_FLAGS -Werror"
140fi
141
142AC_SUBST(WARN_FLAGS)
143
837eabff 144if test -n "${with_target_subdir}"; then
145 GCC_CHECK_UNWIND_GETIPINFO
146else
a4a5a77a 147 ac_save_CFFLAGS="$CFLAGS"
148 CFLAGS="$CFLAGS -Werror-implicit-function-declaration"
149 AC_MSG_CHECKING([for _Unwind_GetIPInfo])
2ee407b0 150 AC_LINK_IFELSE(
a4a5a77a 151 [AC_LANG_PROGRAM(
152 [#include "unwind.h"
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])
837eabff 159 if test "$have_unwind_getipinfo" = "yes"; then
160 AC_DEFINE(HAVE_GETIPINFO, 1, [Define if _Unwind_GetIPInfo is available.])
161 fi
162fi
ecd3459e 163
d0724418 164# Enable --enable-host-shared.
2bd17377 165AC_ARG_ENABLE(host-shared,
166[AS_HELP_STRING([--enable-host-shared],
167 [build host code as shared libraries])],
d0724418 168[PIC_FLAG=-fPIC], [PIC_FLAG=])
ecd3459e 169AC_SUBST(PIC_FLAG)
170
171# Test for __sync support.
172AC_CACHE_CHECK([__sync extensions],
173[libbacktrace_cv_sys_sync],
174[if test -n "${with_target_subdir}"; then
175 libbacktrace_cv_sys_sync=yes
176 else
177 AC_LINK_IFELSE(
178 [AC_LANG_PROGRAM([int i;],
179 [__sync_bool_compare_and_swap (&i, i, i);
180 __sync_lock_test_and_set (&i, 1);
181 __sync_lock_release (&i);])],
182 [libbacktrace_cv_sys_sync=yes],
183 [libbacktrace_cv_sys_sync=no])
184 fi])
185BACKTRACE_SUPPORTS_THREADS=0
186if test "$libbacktrace_cv_sys_sync" = "yes"; then
187 BACKTRACE_SUPPORTS_THREADS=1
188 AC_DEFINE([HAVE_SYNC_FUNCTIONS], 1,
189 [Define to 1 if you have the __sync functions])
190fi
191AC_SUBST(BACKTRACE_SUPPORTS_THREADS)
192
bcafb4a8 193# Test for __atomic support.
194AC_CACHE_CHECK([__atomic extensions],
195[libbacktrace_cv_sys_atomic],
196[if test -n "${with_target_subdir}"; then
197 libbacktrace_cv_sys_atomic=yes
198 else
199 AC_LINK_IFELSE(
200 [AC_LANG_PROGRAM([int i;],
201 [__atomic_load_n (&i, __ATOMIC_ACQUIRE);
202 __atomic_store_n (&i, 1, __ATOMIC_RELEASE);])],
203 [libbacktrace_cv_sys_atomic=yes],
204 [libbacktrace_cv_sys_atomic=no])
205 fi])
206if test "$libbacktrace_cv_sys_atomic" = "yes"; then
207 AC_DEFINE([HAVE_ATOMIC_FUNCTIONS], 1,
208 [Define to 1 if you have the __atomic functions])
209fi
210
ecd3459e 211# The library needs to be able to read the executable itself. Compile
212# a file to determine the executable format. The awk script
213# filetype.awk prints out the file type.
214AC_CACHE_CHECK([output filetype],
215[libbacktrace_cv_sys_filetype],
216[filetype=
217AC_COMPILE_IFELSE(
218 [AC_LANG_PROGRAM([int i;], [int j;])],
219 [filetype=`${AWK} -f $srcdir/filetype.awk conftest.$ac_objext`],
220 [AC_MSG_FAILURE([compiler failed])])
221libbacktrace_cv_sys_filetype=$filetype])
222
223# Match the file type to decide what files to compile.
224FORMAT_FILE=
48ee217e 225backtrace_supports_data=yes
ecd3459e 226case "$libbacktrace_cv_sys_filetype" in
227elf*) FORMAT_FILE="elf.lo" ;;
48ee217e 228pecoff) FORMAT_FILE="pecoff.lo"
229 backtrace_supports_data=no
230 ;;
ecd3459e 231*) AC_MSG_WARN([could not determine output file type])
232 FORMAT_FILE="unknown.lo"
233 backtrace_supported=no
234 ;;
235esac
236AC_SUBST(FORMAT_FILE)
237
238# ELF defines.
239elfsize=
240case "$libbacktrace_cv_sys_filetype" in
241elf32) elfsize=32 ;;
242elf64) elfsize=64 ;;
48ee217e 243*) elfsize=unused
ecd3459e 244esac
245AC_DEFINE_UNQUOTED([BACKTRACE_ELF_SIZE], [$elfsize], [ELF size: 32 or 64])
246
247BACKTRACE_SUPPORTED=0
248if test "$backtrace_supported" = "yes"; then
249 BACKTRACE_SUPPORTED=1
250fi
251AC_SUBST(BACKTRACE_SUPPORTED)
252
48ee217e 253BACKTRACE_SUPPORTS_DATA=0
254if test "$backtrace_supports_data" = "yes"; then
255 BACKTRACE_SUPPORTS_DATA=1
256fi
257AC_SUBST(BACKTRACE_SUPPORTS_DATA)
258
b945b61c 259GCC_HEADER_STDINT(gstdint.h)
260
ecd3459e 261AC_CHECK_HEADERS(sys/mman.h)
262if test "$ac_cv_header_sys_mman_h" = "no"; then
263 have_mmap=no
264else
265 if test -n "${with_target_subdir}"; then
266 # When built as a GCC target library, we can't do a link test. We
267 # simply assume that if we have mman.h, we have mmap.
268 have_mmap=yes
de04a87e 269 case "${host}" in
270 spu-*-*)
271 # The SPU does not have mmap, but it has a sys/mman.h header file
272 # containing "mmap_eaddr" and the mmap flags, confusing the test.
273 have_mmap=no ;;
274 esac
ecd3459e 275 else
276 AC_CHECK_FUNC(mmap, [have_mmap=yes], [have_mmap=no])
277 fi
278fi
279if test "$have_mmap" = "no"; then
280 VIEW_FILE=read.lo
281 ALLOC_FILE=alloc.lo
282else
283 VIEW_FILE=mmapio.lo
284 AC_PREPROC_IFELSE([
285#include <sys/mman.h>
286#if !defined(MAP_ANONYMOUS) && !defined(MAP_ANON)
287 #error no MAP_ANONYMOUS
288#endif
289], [ALLOC_FILE=mmap.lo], [ALLOC_FILE=alloc.lo])
290fi
291AC_SUBST(VIEW_FILE)
292AC_SUBST(ALLOC_FILE)
293
294BACKTRACE_USES_MALLOC=0
295if test "$ALLOC_FILE" = "alloc.lo"; then
296 BACKTRACE_USES_MALLOC=1
297fi
298AC_SUBST(BACKTRACE_USES_MALLOC)
299
1bfb5d87 300# Check for dl_iterate_phdr.
301AC_CHECK_HEADERS(link.h)
302if test "$ac_cv_header_link_h" = "no"; then
303 have_dl_iterate_phdr=no
304else
305 if test -n "${with_target_subdir}"; then
306 # When built as a GCC target library, we can't do a link test.
307 AC_EGREP_HEADER([dl_iterate_phdr], [link.h], [have_dl_iterate_phdr=yes],
308 [have_dl_iterate_phdr=no])
90de4704 309 case "${host}" in
310 *-*-solaris2.10*)
311 # Avoid dl_iterate_phdr on Solaris 10, where it is in the
312 # header file but is only in -ldl.
313 have_dl_iterate_phdr=no ;;
314 esac
1bfb5d87 315 else
316 AC_CHECK_FUNC([dl_iterate_phdr], [have_dl_iterate_phdr=yes],
317 [have_dl_iterate_phdr=no])
318 fi
319fi
320if test "$have_dl_iterate_phdr" = "yes"; then
321 AC_DEFINE(HAVE_DL_ITERATE_PHDR, 1, [Define if dl_iterate_phdr is available.])
322fi
323
7341e544 324# Check for the fcntl function.
325if test -n "${with_target_subdir}"; then
326 case "${host}" in
327 *-*-mingw*) have_fcntl=no ;;
328 *) have_fcntl=yes ;;
329 esac
330else
331 AC_CHECK_FUNC(fcntl, [have_fcntl=yes], [have_fcntl=no])
332fi
333if test "$have_fcntl" = "yes"; then
334 AC_DEFINE([HAVE_FCNTL], 1,
335 [Define to 1 if you have the fcntl function])
336fi
337
5f7c240f 338AC_CHECK_DECLS(strnlen)
339
686b3772 340# Check for getexecname function.
341if test -n "${with_target_subdir}"; then
342 case "${host}" in
343 *-*-solaris2*) have_getexecname=yes ;;
344 *) have_getexecname=no ;;
345 esac
346else
347 AC_CHECK_FUNC(getexecname, [have_getexecname=yes], [have_getexecname=no])
348fi
349if test "$have_getexecname" = "yes"; then
350 AC_DEFINE(HAVE_GETEXECNAME, 1, [Define if getexecname is available.])
351fi
352
ecd3459e 353AC_CACHE_CHECK([whether tests can run],
354 [libbacktrace_cv_sys_native],
355 [AC_RUN_IFELSE([AC_LANG_PROGRAM([], [return 0;])],
356 [libbacktrace_cv_sys_native=yes],
357 [libbacktrace_cv_sys_native=no],
358 [libbacktrace_cv_sys_native=no])])
359AM_CONDITIONAL(NATIVE, test "$libbacktrace_cv_sys_native" = "yes")
360
361if test "${multilib}" = "yes"; then
362 multilib_arg="--enable-multilib"
363else
364 multilib_arg=
365fi
366
367AC_CONFIG_FILES(Makefile backtrace-supported.h)
368
369# We need multilib support, but only if configuring for the target.
370AC_CONFIG_COMMANDS([default],
371[if test -n "$CONFIG_FILES"; then
372 if test -n "${with_target_subdir}"; then
373 # Multilibs need MULTISUBDIR defined correctly in certain makefiles so
374 # that multilib installs will end up installed in the correct place.
375 # The testsuite needs it for multilib-aware ABI baseline files.
376 # To work around this not being passed down from config-ml.in ->
377 # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually
378 # append it here. Only modify Makefiles that have just been created.
379 #
380 # Also, get rid of this simulated-VPATH thing that automake does.
381 cat > vpsed << \_EOF
382 s!`test -f '$<' || echo '$(srcdir)/'`!!
383_EOF
384 for i in $SUBDIRS; do
385 case $CONFIG_FILES in
386 *${i}/Makefile*)
387 #echo "Adding MULTISUBDIR to $i/Makefile"
388 sed -f vpsed $i/Makefile > tmp
389 grep '^MULTISUBDIR =' Makefile >> tmp
390 mv tmp $i/Makefile
391 ;;
392 esac
393 done
394 rm vpsed
395 fi
396 fi
397],
398[
399# Variables needed in config.status (file generation) which aren't already
400# passed by autoconf.
401SUBDIRS="$SUBDIRS"
402])
403
404AC_OUTPUT