1# configure.ac -- Backtrace configure script. 2# Copyright (C) 2012-2018 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) 36AC_CONFIG_MACRO_DIR(config) 37 38# with_target_subdir is used when configured as part of a GCC tree. 39if test -n "${with_target_subdir}"; then 40 AM_ENABLE_MULTILIB(, ..) 41fi 42 43AC_CANONICAL_SYSTEM 44target_alias=${target_alias-$host_alias} 45 46AC_USE_SYSTEM_EXTENSIONS 47 48libtool_VERSION=1:0:0 49AC_SUBST(libtool_VERSION) 50 51# 1.11.1: Require that version of automake. 52# foreign: Don't require README, INSTALL, NEWS, etc. 53# no-define: Don't define PACKAGE and VERSION. 54# no-dependencies: Don't generate automatic dependencies. 55# (because it breaks when using bootstrap-lean, since some of the 56# headers are gone at "make install" time). 57# -Wall: Issue all automake warnings. 58# -Wno-portability: Don't warn about constructs supported by GNU make. 59# (because GCC requires GNU make anyhow). 60AM_INIT_AUTOMAKE([1.11.1 foreign no-dist no-define no-dependencies -Wall -Wno-portability]) 61 62AM_MAINTAINER_MODE 63 64AC_ARG_WITH(target-subdir, 65[ --with-target-subdir=SUBDIR Configuring in a subdirectory for target]) 66 67# We must force CC to /not/ be precious variables; otherwise 68# the wrong, non-multilib-adjusted value will be used in multilibs. 69# As a side effect, we have to subst CFLAGS ourselves. 70m4_rename([_AC_ARG_VAR_PRECIOUS],[backtrace_PRECIOUS]) 71m4_define([_AC_ARG_VAR_PRECIOUS],[]) 72AC_PROG_CC 73m4_rename_force([backtrace_PRECIOUS],[_AC_ARG_VAR_PRECIOUS]) 74 75AC_SUBST(CFLAGS) 76 77AC_PROG_AWK 78case "$AWK" in 79"") AC_MSG_ERROR([can't build without awk]) ;; 80esac 81 82LT_INIT 83AM_PROG_LIBTOOL 84 85AC_SYS_LARGEFILE 86 87backtrace_supported=yes 88 89if test -n "${with_target_subdir}"; then 90 # We are compiling a GCC library. We can assume that the unwind 91 # library exists. 92 BACKTRACE_FILE="backtrace.lo simple.lo" 93else 94 AC_CHECK_HEADER([unwind.h], 95 [AC_CHECK_FUNC([_Unwind_Backtrace], 96 [BACKTRACE_FILE="backtrace.lo simple.lo"], 97 [BACKTRACE_FILE="nounwind.lo" 98 backtrace_supported=no])], 99 [BACKTRACE_FILE="nounwind.lo" 100 backtrace_supported=no]) 101fi 102AC_SUBST(BACKTRACE_FILE) 103 104EXTRA_FLAGS= 105if test -n "${with_target_subdir}"; then 106 EXTRA_FLAGS="-funwind-tables -frandom-seed=\$@" 107else 108 AC_CACHE_CHECK([for -funwind-tables option], 109 [libbacktrace_cv_c_unwind_tables], 110 [CFLAGS_hold="$CFLAGS" 111 CFLAGS="$CFLAGS -funwind-tables" 112 AC_COMPILE_IFELSE( 113 [AC_LANG_PROGRAM([static int f() { return 0; }], [return f();])], 114 [libbacktrace_cv_c_unwind_tables=yes], 115 [libbacktrace_cv_c_unwind_tables=no]) 116 CFLAGS="$CFLAGS_hold"]) 117 if test "$libbacktrace_cv_c_unwind_tables" = "yes"; then 118 EXTRA_FLAGS=-funwind-tables 119 fi 120 AC_CACHE_CHECK([for -frandom-seed=string option], 121 [libbacktrace_cv_c_random_seed_string], 122 [CFLAGS_hold="$CFLAGS" 123 CFLAGS="$CFLAGS -frandom-seed=conftest.lo" 124 AC_COMPILE_IFELSE( 125 [AC_LANG_PROGRAM([], [return 0;])], 126 [libbacktrace_cv_c_random_seed_string=yes], 127 [libbacktrace_cv_c_random_seed_string=no]) 128 CFLAGS="$CFLAGS_hold"]) 129 if test "$libbacktrace_cv_c_random_seed_string" = "yes"; then 130 EXTRA_FLAGS="$EXTRA_FLAGS -frandom-seed=\$@" 131 fi 132fi 133AC_SUBST(EXTRA_FLAGS) 134 135ACX_PROG_CC_WARNING_OPTS([-W -Wall -Wwrite-strings -Wstrict-prototypes \ 136 -Wmissing-prototypes -Wold-style-definition \ 137 -Wmissing-format-attribute -Wcast-qual], 138 [WARN_FLAGS]) 139 140if test -n "${with_target_subdir}"; then 141 WARN_FLAGS="$WARN_FLAGS -Werror" 142fi 143 144AC_SUBST(WARN_FLAGS) 145 146if test -n "${with_target_subdir}"; then 147 GCC_CHECK_UNWIND_GETIPINFO 148else 149 ac_save_CFFLAGS="$CFLAGS" 150 CFLAGS="$CFLAGS -Werror-implicit-function-declaration" 151 AC_MSG_CHECKING([for _Unwind_GetIPInfo]) 152 AC_LINK_IFELSE( 153 [AC_LANG_PROGRAM( 154 [#include "unwind.h" 155 struct _Unwind_Context *context; 156 int ip_before_insn = 0;], 157 [return _Unwind_GetIPInfo (context, &ip_before_insn);])], 158 [have_unwind_getipinfo=yes], [have_unwind_getipinfo=no]) 159 CFLAGS="$ac_save_CFLAGS" 160 AC_MSG_RESULT([$have_unwind_getipinfo]) 161 if test "$have_unwind_getipinfo" = "yes"; then 162 AC_DEFINE(HAVE_GETIPINFO, 1, [Define if _Unwind_GetIPInfo is available.]) 163 fi 164fi 165 166# Enable --enable-host-shared. 167AC_ARG_ENABLE(host-shared, 168[AS_HELP_STRING([--enable-host-shared], 169 [build host code as shared libraries])], 170[PIC_FLAG=-fPIC], [PIC_FLAG=]) 171AC_SUBST(PIC_FLAG) 172 173# Test for __sync support. 174AC_CACHE_CHECK([__sync extensions], 175[libbacktrace_cv_sys_sync], 176[if test -n "${with_target_subdir}"; then 177 case "${host}" in 178 hppa*-*-hpux*) libbacktrace_cv_sys_sync=no ;; 179 *) libbacktrace_cv_sys_sync=yes ;; 180 esac 181 else 182 AC_LINK_IFELSE( 183 [AC_LANG_PROGRAM([int i;], 184 [__sync_bool_compare_and_swap (&i, i, i); 185 __sync_lock_test_and_set (&i, 1); 186 __sync_lock_release (&i);])], 187 [libbacktrace_cv_sys_sync=yes], 188 [libbacktrace_cv_sys_sync=no]) 189 fi]) 190BACKTRACE_SUPPORTS_THREADS=0 191if test "$libbacktrace_cv_sys_sync" = "yes"; then 192 BACKTRACE_SUPPORTS_THREADS=1 193 AC_DEFINE([HAVE_SYNC_FUNCTIONS], 1, 194 [Define to 1 if you have the __sync functions]) 195fi 196AC_SUBST(BACKTRACE_SUPPORTS_THREADS) 197 198# Test for __atomic support. 199AC_CACHE_CHECK([__atomic extensions], 200[libbacktrace_cv_sys_atomic], 201[if test -n "${with_target_subdir}"; then 202 libbacktrace_cv_sys_atomic=yes 203 else 204 AC_LINK_IFELSE( 205 [AC_LANG_PROGRAM([int i;], 206 [__atomic_load_n (&i, __ATOMIC_ACQUIRE); 207 __atomic_store_n (&i, 1, __ATOMIC_RELEASE);])], 208 [libbacktrace_cv_sys_atomic=yes], 209 [libbacktrace_cv_sys_atomic=no]) 210 fi]) 211if test "$libbacktrace_cv_sys_atomic" = "yes"; then 212 AC_DEFINE([HAVE_ATOMIC_FUNCTIONS], 1, 213 [Define to 1 if you have the __atomic functions]) 214fi 215 216# The library needs to be able to read the executable itself. Compile 217# a file to determine the executable format. The awk script 218# filetype.awk prints out the file type. 219AC_CACHE_CHECK([output filetype], 220[libbacktrace_cv_sys_filetype], 221[filetype= 222AC_COMPILE_IFELSE( 223 [AC_LANG_PROGRAM([int i;], [int j;])], 224 [filetype=`${AWK} -f $srcdir/filetype.awk conftest.$ac_objext`], 225 [AC_MSG_FAILURE([compiler failed])]) 226libbacktrace_cv_sys_filetype=$filetype]) 227 228# Match the file type to decide what files to compile. 229FORMAT_FILE= 230backtrace_supports_data=yes 231case "$libbacktrace_cv_sys_filetype" in 232elf*) FORMAT_FILE="elf.lo" ;; 233pecoff) FORMAT_FILE="pecoff.lo" 234 backtrace_supports_data=no 235 ;; 236xcoff*) FORMAT_FILE="xcoff.lo" 237 backtrace_supports_data=no 238 ;; 239macho*) FORMAT_FILE="macho.lo" 240 backtrace_supports_data=no 241 ;; 242*) AC_MSG_WARN([could not determine output file type]) 243 FORMAT_FILE="unknown.lo" 244 backtrace_supported=no 245 ;; 246esac 247AC_SUBST(FORMAT_FILE) 248 249# ELF defines. 250elfsize= 251case "$libbacktrace_cv_sys_filetype" in 252elf32) elfsize=32 ;; 253elf64) elfsize=64 ;; 254*) elfsize=unused 255esac 256AC_DEFINE_UNQUOTED([BACKTRACE_ELF_SIZE], [$elfsize], [ELF size: 32 or 64]) 257 258# XCOFF defines. 259xcoffsize= 260case "$libbacktrace_cv_sys_filetype" in 261xcoff32) xcoffsize=32 ;; 262xcoff64) xcoffsize=64 ;; 263*) xcoffsize=unused 264esac 265AC_DEFINE_UNQUOTED([BACKTRACE_XCOFF_SIZE], [$xcoffsize], [XCOFF size: 32 or 64]) 266 267BACKTRACE_SUPPORTED=0 268if test "$backtrace_supported" = "yes"; then 269 BACKTRACE_SUPPORTED=1 270fi 271AC_SUBST(BACKTRACE_SUPPORTED) 272 273BACKTRACE_SUPPORTS_DATA=0 274if test "$backtrace_supports_data" = "yes"; then 275 BACKTRACE_SUPPORTS_DATA=1 276fi 277AC_SUBST(BACKTRACE_SUPPORTS_DATA) 278 279AC_CHECK_HEADERS(sys/mman.h) 280if test "$ac_cv_header_sys_mman_h" = "no"; then 281 have_mmap=no 282else 283 if test -n "${with_target_subdir}"; then 284 # When built as a GCC target library, we can't do a link test. We 285 # simply assume that if we have mman.h, we have mmap. 286 have_mmap=yes 287 case "${host}" in 288 spu-*-*|*-*-msdosdjgpp) 289 # The SPU does not have mmap, but it has a sys/mman.h header file 290 # containing "mmap_eaddr" and the mmap flags, confusing the test. 291 # DJGPP also has sys/man.h, but no mmap 292 have_mmap=no ;; 293 esac 294 else 295 AC_CHECK_FUNC(mmap, [have_mmap=yes], [have_mmap=no]) 296 fi 297fi 298 299case "${host_os}" in 300darwin*) 301 have_mmap=no ;; 302esac 303 304if test "$have_mmap" = "no"; then 305 VIEW_FILE=read.lo 306 ALLOC_FILE=alloc.lo 307else 308 VIEW_FILE=mmapio.lo 309 AC_PREPROC_IFELSE([ 310#include <sys/mman.h> 311#if !defined(MAP_ANONYMOUS) && !defined(MAP_ANON) 312 #error no MAP_ANONYMOUS 313#endif 314], [ALLOC_FILE=mmap.lo], [ALLOC_FILE=alloc.lo]) 315fi 316AC_SUBST(VIEW_FILE) 317AC_SUBST(ALLOC_FILE) 318 319BACKTRACE_USES_MALLOC=0 320if test "$ALLOC_FILE" = "alloc.lo"; then 321 BACKTRACE_USES_MALLOC=1 322fi 323AC_SUBST(BACKTRACE_USES_MALLOC) 324 325# Check for dl_iterate_phdr. 326AC_CHECK_HEADERS(link.h) 327if test "$ac_cv_header_link_h" = "no"; then 328 have_dl_iterate_phdr=no 329else 330 if test -n "${with_target_subdir}"; then 331 # When built as a GCC target library, we can't do a link test. 332 AC_EGREP_HEADER([dl_iterate_phdr], [link.h], [have_dl_iterate_phdr=yes], 333 [have_dl_iterate_phdr=no]) 334 case "${host}" in 335 *-*-solaris2.10*) 336 # Avoid dl_iterate_phdr on Solaris 10, where it is in the 337 # header file but is only in -ldl. 338 have_dl_iterate_phdr=no ;; 339 esac 340 else 341 AC_CHECK_FUNC([dl_iterate_phdr], [have_dl_iterate_phdr=yes], 342 [have_dl_iterate_phdr=no]) 343 fi 344fi 345if test "$have_dl_iterate_phdr" = "yes"; then 346 AC_DEFINE(HAVE_DL_ITERATE_PHDR, 1, [Define if dl_iterate_phdr is available.]) 347fi 348 349# Check for loadquery. 350AC_CHECK_HEADERS(sys/ldr.h) 351if test "$ac_cv_header_sys_ldr_h" = "no"; then 352 have_loadquery=no 353else 354 if test -n "${with_target_subdir}"; then 355 # When built as a GCC target library, we can't do a link test. 356 AC_EGREP_HEADER([loadquery], [sys/ldr.h], [have_loadquery=yes], 357 [have_loadquery=no]) 358 else 359 AC_CHECK_FUNC([loadquery], [have_loadquery=yes], 360 [have_loadquery=no]) 361 fi 362fi 363if test "$have_loadquery" = "yes"; then 364 AC_DEFINE(HAVE_LOADQUERY, 1, [Define if AIX loadquery is available.]) 365fi 366 367# Check for the fcntl function. 368if test -n "${with_target_subdir}"; then 369 case "${host}" in 370 *-*-mingw*) have_fcntl=no ;; 371 spu-*-*) have_fcntl=no ;; 372 *) have_fcntl=yes ;; 373 esac 374else 375 AC_CHECK_FUNC(fcntl, [have_fcntl=yes], [have_fcntl=no]) 376fi 377if test "$have_fcntl" = "yes"; then 378 AC_DEFINE([HAVE_FCNTL], 1, 379 [Define to 1 if you have the fcntl function]) 380fi 381 382AC_CHECK_DECLS(strnlen) 383AC_CHECK_FUNCS(lstat readlink) 384 385# Check for getexecname function. 386if test -n "${with_target_subdir}"; then 387 case "${host}" in 388 *-*-solaris2*) have_getexecname=yes ;; 389 *) have_getexecname=no ;; 390 esac 391else 392 AC_CHECK_FUNC(getexecname, [have_getexecname=yes], [have_getexecname=no]) 393fi 394if test "$have_getexecname" = "yes"; then 395 AC_DEFINE(HAVE_GETEXECNAME, 1, [Define if getexecname is available.]) 396fi 397 398# Check for the clock_gettime function. 399AC_CHECK_FUNCS(clock_gettime) 400clock_gettime_link= 401# At least for glibc, clock_gettime is in librt. But don't 402# pull that in if it still doesn't give us the function we want. This 403# test is copied from libgomp, and modified to not link in -lrt as 404# we're using this for test timing only. 405if test "$ac_cv_func_clock_gettime" = no; then 406 AC_CHECK_LIB(rt, clock_gettime, 407 [CLOCK_GETTIME_LINK=-lrt 408 AC_DEFINE(HAVE_CLOCK_GETTIME, 1, 409 [Define to 1 if you have the `clock_gettime' function.])]) 410fi 411AC_SUBST(CLOCK_GETTIME_LINK) 412 413dnl Test whether the compiler supports the -pthread option. 414AC_CACHE_CHECK([whether -pthread is supported], 415[libgo_cv_lib_pthread], 416[CFLAGS_hold=$CFLAGS 417CFLAGS="$CFLAGS -pthread" 418AC_COMPILE_IFELSE([[int i;]], 419[libgo_cv_lib_pthread=yes], 420[libgo_cv_lib_pthread=no]) 421CFLAGS=$CFLAGS_hold]) 422PTHREAD_CFLAGS= 423if test "$libgo_cv_lib_pthread" = yes; then 424 PTHREAD_CFLAGS=-pthread 425fi 426AC_SUBST(PTHREAD_CFLAGS) 427 428AM_CONDITIONAL(HAVE_PTHREAD, test "$libgo_cv_lib_pthread" = yes) 429 430AC_CHECK_LIB([z], [compress], []) 431if test $ac_cv_lib_z_compress = "yes"; then 432 AC_DEFINE(HAVE_ZLIB, 1, [Define if -lz is available.]) 433fi 434AM_CONDITIONAL(HAVE_ZLIB, test "$ac_cv_lib_z_compress" = yes) 435 436dnl Test whether the linker supports the --compress_debug_sections option. 437AC_CACHE_CHECK([whether --compress-debug-sections is supported], 438[libgo_cv_ld_compress], 439[LDFLAGS_hold=$LDFLAGS 440LDFLAGS="$LDFLAGS -Wl,--compress-debug-sections=zlib-gnu" 441AC_LINK_IFELSE([AC_LANG_PROGRAM(,)], 442[libgo_cv_ld_compress=yes], 443[libgo_cv_ld_compress=no]) 444LDFLAGS=$LDFLAGS_hold]) 445AM_CONDITIONAL(HAVE_COMPRESSED_DEBUG, test "$libgo_cv_ld_compress" = yes) 446 447AC_ARG_VAR(OBJCOPY, [location of objcopy]) 448AC_CHECK_PROG(OBJCOPY, objcopy, objcopy,) 449AC_CACHE_CHECK([whether objcopy supports debuglink], 450[libbacktrace_cv_objcopy_debuglink], 451[if test -n "${with_target_subdir}"; then 452 libbacktrace_cv_objcopy_debuglink=no 453elif ${OBJCOPY} --add-gnu-debuglink=x /bin/ls /tmp/ls$$; then 454 rm -f /tmp/ls$$ 455 libbacktrace_cv_objcopy_debuglink=yes 456else 457 libbacktrace_cv_objcopy_debuglink=no 458fi]) 459AM_CONDITIONAL(HAVE_OBJCOPY_DEBUGLINK, test "$libbacktrace_cv_objcopy_debuglink" = yes) 460 461AC_CACHE_CHECK([whether tests can run], 462 [libbacktrace_cv_sys_native], 463 [AC_RUN_IFELSE([AC_LANG_PROGRAM([], [return 0;])], 464 [libbacktrace_cv_sys_native=yes], 465 [libbacktrace_cv_sys_native=no], 466 [libbacktrace_cv_sys_native=no])]) 467AM_CONDITIONAL(NATIVE, test "$libbacktrace_cv_sys_native" = "yes") 468 469if test "${multilib}" = "yes"; then 470 multilib_arg="--enable-multilib" 471else 472 multilib_arg= 473fi 474 475AC_CONFIG_FILES(Makefile backtrace-supported.h) 476 477# We need multilib support, but only if configuring for the target. 478AC_CONFIG_COMMANDS([default], 479[if test -n "$CONFIG_FILES"; then 480 if test -n "${with_target_subdir}"; then 481 # Multilibs need MULTISUBDIR defined correctly in certain makefiles so 482 # that multilib installs will end up installed in the correct place. 483 # The testsuite needs it for multilib-aware ABI baseline files. 484 # To work around this not being passed down from config-ml.in -> 485 # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually 486 # append it here. Only modify Makefiles that have just been created. 487 # 488 # Also, get rid of this simulated-VPATH thing that automake does. 489 cat > vpsed << \_EOF 490 s!`test -f '$<' || echo '$(srcdir)/'`!! 491_EOF 492 for i in $SUBDIRS; do 493 case $CONFIG_FILES in 494 *${i}/Makefile*) 495 #echo "Adding MULTISUBDIR to $i/Makefile" 496 sed -f vpsed $i/Makefile > tmp 497 grep '^MULTISUBDIR =' Makefile >> tmp 498 mv tmp $i/Makefile 499 ;; 500 esac 501 done 502 rm vpsed 503 fi 504 fi 505], 506[ 507# Variables needed in config.status (file generation) which aren't already 508# passed by autoconf. 509SUBDIRS="$SUBDIRS" 510]) 511 512AC_OUTPUT 513