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ecd3459e | 1 | # configure.ac -- Backtrace configure script. |
f1717362 | 2 | # Copyright (C) 2012-2016 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 | ||
32 | AC_PREREQ(2.64) | |
33 | AC_INIT(package-unused, version-unused,, libbacktrace) | |
34 | AC_CONFIG_SRCDIR(backtrace.h) | |
35 | AC_CONFIG_HEADER(config.h) | |
36 | ||
8df488f9 | 37 | if test -n "${with_target_subdir}"; then |
38 | AM_ENABLE_MULTILIB(, ..) | |
39 | fi | |
40 | ||
ecd3459e | 41 | AC_CANONICAL_SYSTEM |
42 | target_alias=${target_alias-$host_alias} | |
43 | ||
30bd8e8b | 44 | AC_USE_SYSTEM_EXTENSIONS |
45 | ||
ecd3459e | 46 | libtool_VERSION=1:0:0 |
47 | AC_SUBST(libtool_VERSION) | |
48 | ||
451b8929 | 49 | # 1.11.1: Require that version of automake. |
50 | # foreign: Don't require README, INSTALL, NEWS, etc. | |
51 | # no-define: Don't define PACKAGE and VERSION. | |
52 | # no-dependencies: Don't generate automatic dependencies. | |
53 | # (because it breaks when using bootstrap-lean, since some of the | |
54 | # headers are gone at "make install" time). | |
55 | # -Wall: Issue all automake warnings. | |
56 | # -Wno-portability: Don't warn about constructs supported by GNU make. | |
57 | # (because GCC requires GNU make anyhow). | |
58 | AM_INIT_AUTOMAKE([1.11.1 foreign no-dist no-define no-dependencies -Wall -Wno-portability]) | |
ecd3459e | 59 | |
60 | AM_MAINTAINER_MODE | |
61 | ||
62 | AC_ARG_WITH(target-subdir, | |
63 | [ --with-target-subdir=SUBDIR Configuring in a subdirectory for target]) | |
64 | ||
65 | # We must force CC to /not/ be precious variables; otherwise | |
66 | # the wrong, non-multilib-adjusted value will be used in multilibs. | |
67 | # As a side effect, we have to subst CFLAGS ourselves. | |
68 | m4_rename([_AC_ARG_VAR_PRECIOUS],[backtrace_PRECIOUS]) | |
69 | m4_define([_AC_ARG_VAR_PRECIOUS],[]) | |
70 | AC_PROG_CC | |
71 | m4_rename_force([backtrace_PRECIOUS],[_AC_ARG_VAR_PRECIOUS]) | |
72 | ||
73 | AC_SUBST(CFLAGS) | |
74 | ||
75 | AC_PROG_RANLIB | |
76 | ||
77 | AC_PROG_AWK | |
78 | case "$AWK" in | |
79 | "") AC_MSG_ERROR([can't build without awk]) ;; | |
80 | esac | |
81 | ||
d0724418 | 82 | LT_INIT |
ecd3459e | 83 | AM_PROG_LIBTOOL |
84 | ||
85 | backtrace_supported=yes | |
86 | ||
87 | if test -n "${with_target_subdir}"; then | |
88 | # We are compiling a GCC library. We can assume that the unwind | |
89 | # library exists. | |
ecd3459e | 90 | BACKTRACE_FILE="backtrace.lo simple.lo" |
91 | else | |
92 | AC_CHECK_HEADER([unwind.h], | |
93 | [AC_CHECK_FUNC([_Unwind_Backtrace], | |
94 | [BACKTRACE_FILE="backtrace.lo simple.lo"], | |
95 | [BACKTRACE_FILE="nounwind.lo" | |
96 | backtrace_supported=no])], | |
97 | [BACKTRACE_FILE="nounwind.lo" | |
98 | backtrace_supported=no]) | |
99 | fi | |
100 | AC_SUBST(BACKTRACE_FILE) | |
101 | ||
536b8dd3 | 102 | EXTRA_FLAGS= |
ff2fe13c | 103 | if test -n "${with_target_subdir}"; then |
a7ebc02e | 104 | EXTRA_FLAGS="-funwind-tables -frandom-seed=\$@" |
ff2fe13c | 105 | else |
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="$EXTRA_FLAGS -frandom-seed=\$@" | |
129 | fi | |
536b8dd3 | 130 | fi |
131 | AC_SUBST(EXTRA_FLAGS) | |
132 | ||
ecd3459e | 133 | ACX_PROG_CC_WARNING_OPTS([-W -Wall -Wwrite-strings -Wstrict-prototypes \ |
134 | -Wmissing-prototypes -Wold-style-definition \ | |
135 | -Wmissing-format-attribute -Wcast-qual], | |
136 | [WARN_FLAGS]) | |
137 | ||
47b4f489 | 138 | if test -n "${with_target_subdir}"; then |
ecd3459e | 139 | WARN_FLAGS="$WARN_FLAGS -Werror" |
140 | fi | |
141 | ||
142 | AC_SUBST(WARN_FLAGS) | |
143 | ||
837eabff | 144 | if test -n "${with_target_subdir}"; then |
145 | GCC_CHECK_UNWIND_GETIPINFO | |
146 | else | |
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 "$have_unwind_getipinfo" = "yes"; then |
160 | AC_DEFINE(HAVE_GETIPINFO, 1, [Define if _Unwind_GetIPInfo is available.]) | |
161 | fi | |
162 | fi | |
ecd3459e | 163 | |
d0724418 | 164 | # Enable --enable-host-shared. |
2bd17377 | 165 | AC_ARG_ENABLE(host-shared, |
166 | [AS_HELP_STRING([--enable-host-shared], | |
167 | [build host code as shared libraries])], | |
d0724418 | 168 | [PIC_FLAG=-fPIC], [PIC_FLAG=]) |
ecd3459e | 169 | AC_SUBST(PIC_FLAG) |
170 | ||
171 | # Test for __sync support. | |
172 | AC_CACHE_CHECK([__sync extensions], | |
173 | [libbacktrace_cv_sys_sync], | |
174 | [if test -n "${with_target_subdir}"; then | |
ab861c80 | 175 | case "${host}" in |
176 | hppa*-*-hpux*) libbacktrace_cv_sys_sync=no ;; | |
177 | *) libbacktrace_cv_sys_sync=yes ;; | |
178 | esac | |
ecd3459e | 179 | else |
180 | AC_LINK_IFELSE( | |
181 | [AC_LANG_PROGRAM([int i;], | |
182 | [__sync_bool_compare_and_swap (&i, i, i); | |
183 | __sync_lock_test_and_set (&i, 1); | |
184 | __sync_lock_release (&i);])], | |
185 | [libbacktrace_cv_sys_sync=yes], | |
186 | [libbacktrace_cv_sys_sync=no]) | |
187 | fi]) | |
188 | BACKTRACE_SUPPORTS_THREADS=0 | |
189 | if test "$libbacktrace_cv_sys_sync" = "yes"; then | |
190 | BACKTRACE_SUPPORTS_THREADS=1 | |
191 | AC_DEFINE([HAVE_SYNC_FUNCTIONS], 1, | |
192 | [Define to 1 if you have the __sync functions]) | |
193 | fi | |
194 | AC_SUBST(BACKTRACE_SUPPORTS_THREADS) | |
195 | ||
bcafb4a8 | 196 | # Test for __atomic support. |
197 | AC_CACHE_CHECK([__atomic extensions], | |
198 | [libbacktrace_cv_sys_atomic], | |
199 | [if test -n "${with_target_subdir}"; then | |
200 | libbacktrace_cv_sys_atomic=yes | |
201 | else | |
202 | AC_LINK_IFELSE( | |
203 | [AC_LANG_PROGRAM([int i;], | |
204 | [__atomic_load_n (&i, __ATOMIC_ACQUIRE); | |
205 | __atomic_store_n (&i, 1, __ATOMIC_RELEASE);])], | |
206 | [libbacktrace_cv_sys_atomic=yes], | |
207 | [libbacktrace_cv_sys_atomic=no]) | |
208 | fi]) | |
209 | if test "$libbacktrace_cv_sys_atomic" = "yes"; then | |
210 | AC_DEFINE([HAVE_ATOMIC_FUNCTIONS], 1, | |
211 | [Define to 1 if you have the __atomic functions]) | |
212 | fi | |
213 | ||
ecd3459e | 214 | # The library needs to be able to read the executable itself. Compile |
215 | # a file to determine the executable format. The awk script | |
216 | # filetype.awk prints out the file type. | |
217 | AC_CACHE_CHECK([output filetype], | |
218 | [libbacktrace_cv_sys_filetype], | |
219 | [filetype= | |
220 | AC_COMPILE_IFELSE( | |
221 | [AC_LANG_PROGRAM([int i;], [int j;])], | |
222 | [filetype=`${AWK} -f $srcdir/filetype.awk conftest.$ac_objext`], | |
223 | [AC_MSG_FAILURE([compiler failed])]) | |
224 | libbacktrace_cv_sys_filetype=$filetype]) | |
225 | ||
226 | # Match the file type to decide what files to compile. | |
227 | FORMAT_FILE= | |
48ee217e | 228 | backtrace_supports_data=yes |
ecd3459e | 229 | case "$libbacktrace_cv_sys_filetype" in |
230 | elf*) FORMAT_FILE="elf.lo" ;; | |
48ee217e | 231 | pecoff) FORMAT_FILE="pecoff.lo" |
232 | backtrace_supports_data=no | |
233 | ;; | |
ecd3459e | 234 | *) AC_MSG_WARN([could not determine output file type]) |
235 | FORMAT_FILE="unknown.lo" | |
236 | backtrace_supported=no | |
237 | ;; | |
238 | esac | |
239 | AC_SUBST(FORMAT_FILE) | |
240 | ||
241 | # ELF defines. | |
242 | elfsize= | |
243 | case "$libbacktrace_cv_sys_filetype" in | |
244 | elf32) elfsize=32 ;; | |
245 | elf64) elfsize=64 ;; | |
48ee217e | 246 | *) elfsize=unused |
ecd3459e | 247 | esac |
248 | AC_DEFINE_UNQUOTED([BACKTRACE_ELF_SIZE], [$elfsize], [ELF size: 32 or 64]) | |
249 | ||
250 | BACKTRACE_SUPPORTED=0 | |
251 | if test "$backtrace_supported" = "yes"; then | |
252 | BACKTRACE_SUPPORTED=1 | |
253 | fi | |
254 | AC_SUBST(BACKTRACE_SUPPORTED) | |
255 | ||
48ee217e | 256 | BACKTRACE_SUPPORTS_DATA=0 |
257 | if test "$backtrace_supports_data" = "yes"; then | |
258 | BACKTRACE_SUPPORTS_DATA=1 | |
259 | fi | |
260 | AC_SUBST(BACKTRACE_SUPPORTS_DATA) | |
261 | ||
b945b61c | 262 | GCC_HEADER_STDINT(gstdint.h) |
263 | ||
ecd3459e | 264 | AC_CHECK_HEADERS(sys/mman.h) |
265 | if test "$ac_cv_header_sys_mman_h" = "no"; then | |
266 | have_mmap=no | |
267 | else | |
268 | if test -n "${with_target_subdir}"; then | |
269 | # When built as a GCC target library, we can't do a link test. We | |
270 | # simply assume that if we have mman.h, we have mmap. | |
271 | have_mmap=yes | |
de04a87e | 272 | case "${host}" in |
b767924b | 273 | spu-*-*|*-*-msdosdjgpp) |
de04a87e | 274 | # The SPU does not have mmap, but it has a sys/mman.h header file |
275 | # containing "mmap_eaddr" and the mmap flags, confusing the test. | |
b767924b | 276 | # DJGPP also has sys/man.h, but no mmap |
de04a87e | 277 | have_mmap=no ;; |
278 | esac | |
ecd3459e | 279 | else |
280 | AC_CHECK_FUNC(mmap, [have_mmap=yes], [have_mmap=no]) | |
281 | fi | |
282 | fi | |
283 | if test "$have_mmap" = "no"; then | |
284 | VIEW_FILE=read.lo | |
285 | ALLOC_FILE=alloc.lo | |
286 | else | |
287 | VIEW_FILE=mmapio.lo | |
288 | AC_PREPROC_IFELSE([ | |
289 | #include <sys/mman.h> | |
290 | #if !defined(MAP_ANONYMOUS) && !defined(MAP_ANON) | |
291 | #error no MAP_ANONYMOUS | |
292 | #endif | |
293 | ], [ALLOC_FILE=mmap.lo], [ALLOC_FILE=alloc.lo]) | |
294 | fi | |
295 | AC_SUBST(VIEW_FILE) | |
296 | AC_SUBST(ALLOC_FILE) | |
297 | ||
298 | BACKTRACE_USES_MALLOC=0 | |
299 | if test "$ALLOC_FILE" = "alloc.lo"; then | |
300 | BACKTRACE_USES_MALLOC=1 | |
301 | fi | |
302 | AC_SUBST(BACKTRACE_USES_MALLOC) | |
303 | ||
1bfb5d87 | 304 | # Check for dl_iterate_phdr. |
305 | AC_CHECK_HEADERS(link.h) | |
306 | if test "$ac_cv_header_link_h" = "no"; then | |
307 | have_dl_iterate_phdr=no | |
308 | else | |
309 | if test -n "${with_target_subdir}"; then | |
310 | # When built as a GCC target library, we can't do a link test. | |
311 | AC_EGREP_HEADER([dl_iterate_phdr], [link.h], [have_dl_iterate_phdr=yes], | |
312 | [have_dl_iterate_phdr=no]) | |
90de4704 | 313 | case "${host}" in |
314 | *-*-solaris2.10*) | |
315 | # Avoid dl_iterate_phdr on Solaris 10, where it is in the | |
316 | # header file but is only in -ldl. | |
317 | have_dl_iterate_phdr=no ;; | |
318 | esac | |
1bfb5d87 | 319 | else |
320 | AC_CHECK_FUNC([dl_iterate_phdr], [have_dl_iterate_phdr=yes], | |
321 | [have_dl_iterate_phdr=no]) | |
322 | fi | |
323 | fi | |
324 | if test "$have_dl_iterate_phdr" = "yes"; then | |
325 | AC_DEFINE(HAVE_DL_ITERATE_PHDR, 1, [Define if dl_iterate_phdr is available.]) | |
326 | fi | |
327 | ||
7341e544 | 328 | # Check for the fcntl function. |
329 | if test -n "${with_target_subdir}"; then | |
330 | case "${host}" in | |
331 | *-*-mingw*) have_fcntl=no ;; | |
b2d409ee | 332 | spu-*-*) have_fcntl=no ;; |
7341e544 | 333 | *) have_fcntl=yes ;; |
334 | esac | |
335 | else | |
336 | AC_CHECK_FUNC(fcntl, [have_fcntl=yes], [have_fcntl=no]) | |
337 | fi | |
338 | if test "$have_fcntl" = "yes"; then | |
339 | AC_DEFINE([HAVE_FCNTL], 1, | |
340 | [Define to 1 if you have the fcntl function]) | |
341 | fi | |
342 | ||
5f7c240f | 343 | AC_CHECK_DECLS(strnlen) |
344 | ||
686b3772 | 345 | # Check for getexecname function. |
346 | if test -n "${with_target_subdir}"; then | |
347 | case "${host}" in | |
348 | *-*-solaris2*) have_getexecname=yes ;; | |
349 | *) have_getexecname=no ;; | |
350 | esac | |
351 | else | |
352 | AC_CHECK_FUNC(getexecname, [have_getexecname=yes], [have_getexecname=no]) | |
353 | fi | |
354 | if test "$have_getexecname" = "yes"; then | |
355 | AC_DEFINE(HAVE_GETEXECNAME, 1, [Define if getexecname is available.]) | |
356 | fi | |
357 | ||
ecd3459e | 358 | AC_CACHE_CHECK([whether tests can run], |
359 | [libbacktrace_cv_sys_native], | |
360 | [AC_RUN_IFELSE([AC_LANG_PROGRAM([], [return 0;])], | |
361 | [libbacktrace_cv_sys_native=yes], | |
362 | [libbacktrace_cv_sys_native=no], | |
363 | [libbacktrace_cv_sys_native=no])]) | |
364 | AM_CONDITIONAL(NATIVE, test "$libbacktrace_cv_sys_native" = "yes") | |
365 | ||
366 | if test "${multilib}" = "yes"; then | |
367 | multilib_arg="--enable-multilib" | |
368 | else | |
369 | multilib_arg= | |
370 | fi | |
371 | ||
372 | AC_CONFIG_FILES(Makefile backtrace-supported.h) | |
373 | ||
374 | # We need multilib support, but only if configuring for the target. | |
375 | AC_CONFIG_COMMANDS([default], | |
376 | [if test -n "$CONFIG_FILES"; then | |
377 | if test -n "${with_target_subdir}"; then | |
378 | # Multilibs need MULTISUBDIR defined correctly in certain makefiles so | |
379 | # that multilib installs will end up installed in the correct place. | |
380 | # The testsuite needs it for multilib-aware ABI baseline files. | |
381 | # To work around this not being passed down from config-ml.in -> | |
382 | # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually | |
383 | # append it here. Only modify Makefiles that have just been created. | |
384 | # | |
385 | # Also, get rid of this simulated-VPATH thing that automake does. | |
386 | cat > vpsed << \_EOF | |
387 | s!`test -f '$<' || echo '$(srcdir)/'`!! | |
388 | _EOF | |
389 | for i in $SUBDIRS; do | |
390 | case $CONFIG_FILES in | |
391 | *${i}/Makefile*) | |
392 | #echo "Adding MULTISUBDIR to $i/Makefile" | |
393 | sed -f vpsed $i/Makefile > tmp | |
394 | grep '^MULTISUBDIR =' Makefile >> tmp | |
395 | mv tmp $i/Makefile | |
396 | ;; | |
397 | esac | |
398 | done | |
399 | rm vpsed | |
400 | fi | |
401 | fi | |
402 | ], | |
403 | [ | |
404 | # Variables needed in config.status (file generation) which aren't already | |
405 | # passed by autoconf. | |
406 | SUBDIRS="$SUBDIRS" | |
407 | ]) | |
408 | ||
409 | AC_OUTPUT |