1# configure.ac -- Backtrace configure script. 2# Copyright (C) 2012-2013 Free Software Foundation, Inc. 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 37AC_CANONICAL_SYSTEM 38target_alias=${target_alias-$host_alias} 39 40AC_USE_SYSTEM_EXTENSIONS 41 42libtool_VERSION=1:0:0 43AC_SUBST(libtool_VERSION) 44 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). 54AM_INIT_AUTOMAKE([1.11.1 foreign no-dist no-define no-dependencies -Wall -Wno-portability]) 55 56AM_MAINTAINER_MODE 57 58AC_ARG_WITH(target-subdir, 59[ --with-target-subdir=SUBDIR Configuring in a subdirectory for target]) 60 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. 64m4_rename([_AC_ARG_VAR_PRECIOUS],[backtrace_PRECIOUS]) 65m4_define([_AC_ARG_VAR_PRECIOUS],[]) 66AC_PROG_CC 67m4_rename_force([backtrace_PRECIOUS],[_AC_ARG_VAR_PRECIOUS]) 68 69AC_SUBST(CFLAGS) 70 71AC_PROG_RANLIB 72 73AC_PROG_AWK 74case "$AWK" in 75"") AC_MSG_ERROR([can't build without awk]) ;; 76esac 77 78LT_INIT([disable-shared]) 79AM_PROG_LIBTOOL 80 81backtrace_supported=yes 82 83if test -n "${with_target_subdir}"; then 84 # We are compiling a GCC library. We can assume that the unwind 85 # library exists. 86 AM_ENABLE_MULTILIB(, ..) 87 BACKTRACE_FILE="backtrace.lo simple.lo" 88else 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]) 96fi 97AC_SUBST(BACKTRACE_FILE) 98 99EXTRA_FLAGS= 100if test -n "${with_target_subdir}"; then 101 EXTRA_FLAGS="-funwind-tables -frandom-seed=\$@" 102else 103 AC_CACHE_CHECK([for -funwind-tables option], 104 [libbacktrace_cv_c_unwind_tables], 105 [CFLAGS_hold="$CFLAGS" 106 CFLAGS="$CFLAGS -funwind-tables" 107 AC_COMPILE_IFELSE( 108 [AC_LANG_PROGRAM([static int f() { return 0; }], [return f();])], 109 [libbacktrace_cv_c_unwind_tables=yes], 110 [libbacktrace_cv_c_unwind_tables=no]) 111 CFLAGS="$CFLAGS_hold"]) 112 if test "$libbacktrace_cv_c_unwind_tables" = "yes"; then 113 EXTRA_FLAGS=-funwind-tables 114 fi 115 AC_CACHE_CHECK([for -frandom-seed=string option], 116 [libbacktrace_cv_c_random_seed_string], 117 [CFLAGS_hold="$CFLAGS" 118 CFLAGS="$CFLAGS -frandom-seed=conftest.lo" 119 AC_COMPILE_IFELSE( 120 [AC_LANG_PROGRAM([], [return 0;])], 121 [libbacktrace_cv_c_random_seed_string=yes], 122 [libbacktrace_cv_c_random_seed_string=no]) 123 CFLAGS="$CFLAGS_hold"]) 124 if test "$libbacktrace_cv_c_random_seed_string" = "yes"; then 125 EXTRA_FLAGS="$EXTRA_FLAGS -frandom-seed=\$@" 126 fi 127fi 128AC_SUBST(EXTRA_FLAGS) 129 130ACX_PROG_CC_WARNING_OPTS([-W -Wall -Wwrite-strings -Wstrict-prototypes \ 131 -Wmissing-prototypes -Wold-style-definition \ 132 -Wmissing-format-attribute -Wcast-qual], 133 [WARN_FLAGS]) 134 135if test -n "${with_target_subdir}"; then 136 WARN_FLAGS="$WARN_FLAGS -Werror" 137fi 138 139AC_SUBST(WARN_FLAGS) 140 141if test -n "${with_target_subdir}"; then 142 GCC_CHECK_UNWIND_GETIPINFO 143else 144 ac_save_CFFLAGS="$CFLAGS" 145 CFLAGS="$CFLAGS -Werror-implicit-function-declaration" 146 AC_MSG_CHECKING([for _Unwind_GetIPInfo]) 147 AC_LINK_IFELSE( 148 [AC_LANG_PROGRAM( 149 [#include "unwind.h" 150 struct _Unwind_Context *context; 151 int ip_before_insn = 0;], 152 [return _Unwind_GetIPInfo (context, &ip_before_insn);])], 153 [have_unwind_getipinfo=yes], [have_unwind_getipinfo=no]) 154 CFLAGS="$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.]) 158 fi 159fi 160 161# 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. 164PIC_FLAG= 165if test -n "${with_target_subdir}"; then 166 PIC_FLAG=-fPIC 167fi 168AC_SUBST(PIC_FLAG) 169 170# Test for __sync support. 171AC_CACHE_CHECK([__sync extensions], 172[libbacktrace_cv_sys_sync], 173[if test -n "${with_target_subdir}"; then 174 libbacktrace_cv_sys_sync=yes 175 else 176 AC_LINK_IFELSE( 177 [AC_LANG_PROGRAM([int i;], 178 [__sync_bool_compare_and_swap (&i, i, i); 179 __sync_lock_test_and_set (&i, 1); 180 __sync_lock_release (&i);])], 181 [libbacktrace_cv_sys_sync=yes], 182 [libbacktrace_cv_sys_sync=no]) 183 fi]) 184BACKTRACE_SUPPORTS_THREADS=0 185if test "$libbacktrace_cv_sys_sync" = "yes"; then 186 BACKTRACE_SUPPORTS_THREADS=1 187 AC_DEFINE([HAVE_SYNC_FUNCTIONS], 1, 188 [Define to 1 if you have the __sync functions]) 189fi 190AC_SUBST(BACKTRACE_SUPPORTS_THREADS) 191 192# The library needs to be able to read the executable itself. Compile 193# a file to determine the executable format. The awk script 194# filetype.awk prints out the file type. 195AC_CACHE_CHECK([output filetype], 196[libbacktrace_cv_sys_filetype], 197[filetype= 198AC_COMPILE_IFELSE( 199 [AC_LANG_PROGRAM([int i;], [int j;])], 200 [filetype=`${AWK} -f $srcdir/filetype.awk conftest.$ac_objext`], 201 [AC_MSG_FAILURE([compiler failed])]) 202libbacktrace_cv_sys_filetype=$filetype]) 203 204# Match the file type to decide what files to compile. 205FORMAT_FILE= 206case "$libbacktrace_cv_sys_filetype" in 207elf*) FORMAT_FILE="elf.lo" ;; 208*) AC_MSG_WARN([could not determine output file type]) 209 FORMAT_FILE="unknown.lo" 210 backtrace_supported=no 211 ;; 212esac 213AC_SUBST(FORMAT_FILE) 214 215# ELF defines. 216elfsize= 217case "$libbacktrace_cv_sys_filetype" in 218elf32) elfsize=32 ;; 219elf64) elfsize=64 ;; 220esac 221AC_DEFINE_UNQUOTED([BACKTRACE_ELF_SIZE], [$elfsize], [ELF size: 32 or 64]) 222 223BACKTRACE_SUPPORTED=0 224if test "$backtrace_supported" = "yes"; then 225 BACKTRACE_SUPPORTED=1 226fi 227AC_SUBST(BACKTRACE_SUPPORTED) 228 229GCC_HEADER_STDINT(gstdint.h) 230 231AC_CHECK_HEADERS(sys/mman.h) 232if test "$ac_cv_header_sys_mman_h" = "no"; then 233 have_mmap=no 234else 235 if test -n "${with_target_subdir}"; then 236 # When built as a GCC target library, we can't do a link test. We 237 # simply assume that if we have mman.h, we have mmap. 238 have_mmap=yes 239 else 240 AC_CHECK_FUNC(mmap, [have_mmap=yes], [have_mmap=no]) 241 fi 242fi 243if test "$have_mmap" = "no"; then 244 VIEW_FILE=read.lo 245 ALLOC_FILE=alloc.lo 246else 247 VIEW_FILE=mmapio.lo 248 AC_PREPROC_IFELSE([ 249#include <sys/mman.h> 250#if !defined(MAP_ANONYMOUS) && !defined(MAP_ANON) 251 #error no MAP_ANONYMOUS 252#endif 253], [ALLOC_FILE=mmap.lo], [ALLOC_FILE=alloc.lo]) 254fi 255AC_SUBST(VIEW_FILE) 256AC_SUBST(ALLOC_FILE) 257 258BACKTRACE_USES_MALLOC=0 259if test "$ALLOC_FILE" = "alloc.lo"; then 260 BACKTRACE_USES_MALLOC=1 261fi 262AC_SUBST(BACKTRACE_USES_MALLOC) 263 264# Check for dl_iterate_phdr. 265AC_CHECK_HEADERS(link.h) 266if test "$ac_cv_header_link_h" = "no"; then 267 have_dl_iterate_phdr=no 268else 269 if test -n "${with_target_subdir}"; then 270 # When built as a GCC target library, we can't do a link test. 271 AC_EGREP_HEADER([dl_iterate_phdr], [link.h], [have_dl_iterate_phdr=yes], 272 [have_dl_iterate_phdr=no]) 273 case "${host}" in 274 *-*-solaris2.10*) 275 # Avoid dl_iterate_phdr on Solaris 10, where it is in the 276 # header file but is only in -ldl. 277 have_dl_iterate_phdr=no ;; 278 esac 279 else 280 AC_CHECK_FUNC([dl_iterate_phdr], [have_dl_iterate_phdr=yes], 281 [have_dl_iterate_phdr=no]) 282 fi 283fi 284if test "$have_dl_iterate_phdr" = "yes"; then 285 AC_DEFINE(HAVE_DL_ITERATE_PHDR, 1, [Define if dl_iterate_phdr is available.]) 286fi 287 288# Check for the fcntl function. 289if test -n "${with_target_subdir}"; then 290 case "${host}" in 291 *-*-mingw*) have_fcntl=no ;; 292 *) have_fcntl=yes ;; 293 esac 294else 295 AC_CHECK_FUNC(fcntl, [have_fcntl=yes], [have_fcntl=no]) 296fi 297if test "$have_fcntl" = "yes"; then 298 AC_DEFINE([HAVE_FCNTL], 1, 299 [Define to 1 if you have the fcntl function]) 300fi 301 302AC_CHECK_DECLS(strnlen) 303 304# Check for getexecname function. 305if test -n "${with_target_subdir}"; then 306 case "${host}" in 307 *-*-solaris2*) have_getexecname=yes ;; 308 *) have_getexecname=no ;; 309 esac 310else 311 AC_CHECK_FUNC(getexecname, [have_getexecname=yes], [have_getexecname=no]) 312fi 313if test "$have_getexecname" = "yes"; then 314 AC_DEFINE(HAVE_GETEXECNAME, 1, [Define if getexecname is available.]) 315fi 316 317AC_CACHE_CHECK([whether tests can run], 318 [libbacktrace_cv_sys_native], 319 [AC_RUN_IFELSE([AC_LANG_PROGRAM([], [return 0;])], 320 [libbacktrace_cv_sys_native=yes], 321 [libbacktrace_cv_sys_native=no], 322 [libbacktrace_cv_sys_native=no])]) 323AM_CONDITIONAL(NATIVE, test "$libbacktrace_cv_sys_native" = "yes") 324 325if test "${multilib}" = "yes"; then 326 multilib_arg="--enable-multilib" 327else 328 multilib_arg= 329fi 330 331AC_CONFIG_FILES(Makefile backtrace-supported.h) 332 333# We need multilib support, but only if configuring for the target. 334AC_CONFIG_COMMANDS([default], 335[if test -n "$CONFIG_FILES"; then 336 if test -n "${with_target_subdir}"; then 337 # Multilibs need MULTISUBDIR defined correctly in certain makefiles so 338 # that multilib installs will end up installed in the correct place. 339 # The testsuite needs it for multilib-aware ABI baseline files. 340 # To work around this not being passed down from config-ml.in -> 341 # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually 342 # append it here. Only modify Makefiles that have just been created. 343 # 344 # Also, get rid of this simulated-VPATH thing that automake does. 345 cat > vpsed << \_EOF 346 s!`test -f '$<' || echo '$(srcdir)/'`!! 347_EOF 348 for i in $SUBDIRS; do 349 case $CONFIG_FILES in 350 *${i}/Makefile*) 351 #echo "Adding MULTISUBDIR to $i/Makefile" 352 sed -f vpsed $i/Makefile > tmp 353 grep '^MULTISUBDIR =' Makefile >> tmp 354 mv tmp $i/Makefile 355 ;; 356 esac 357 done 358 rm vpsed 359 fi 360 fi 361], 362[ 363# Variables needed in config.status (file generation) which aren't already 364# passed by autoconf. 365SUBDIRS="$SUBDIRS" 366]) 367 368AC_OUTPUT 369