# configure.ac -- Backtrace configure script. # Copyright (C) 2012-2019 Free Software Foundation, Inc. # Redistribution and use in source and binary forms, with or without # modification, are permitted provided that the following conditions are # met: # (1) Redistributions of source code must retain the above copyright # notice, this list of conditions and the following disclaimer. # (2) Redistributions in binary form must reproduce the above copyright # notice, this list of conditions and the following disclaimer in # the documentation and/or other materials provided with the # distribution. # (3) The name of the author may not be used to # endorse or promote products derived from this software without # specific prior written permission. # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED # WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE # DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, # INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES # (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR # SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, # STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING # IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE # POSSIBILITY OF SUCH DAMAGE. AC_INIT(package-unused, version-unused,, libbacktrace) AC_CONFIG_SRCDIR(backtrace.h) AC_CONFIG_HEADER(config.h) if test -n "${with_target_subdir}"; then AM_ENABLE_MULTILIB(, ..) fi AC_CANONICAL_SYSTEM target_alias=${target_alias-$host_alias} AC_USE_SYSTEM_EXTENSIONS libtool_VERSION=1:0:0 AC_SUBST(libtool_VERSION) # 1.11.1: Require that version of automake. # foreign: Don't require README, INSTALL, NEWS, etc. # no-define: Don't define PACKAGE and VERSION. # no-dependencies: Don't generate automatic dependencies. # (because it breaks when using bootstrap-lean, since some of the # headers are gone at "make install" time). # -Wall: Issue all automake warnings. # -Wno-portability: Don't warn about constructs supported by GNU make. # (because GCC requires GNU make anyhow). AM_INIT_AUTOMAKE([1.11.1 foreign no-dist no-define no-dependencies -Wall -Wno-portability]) AM_MAINTAINER_MODE AC_ARG_WITH(target-subdir, [ --with-target-subdir=SUBDIR Configuring in a subdirectory for target]) # We must force CC to /not/ be precious variables; otherwise # the wrong, non-multilib-adjusted value will be used in multilibs. # As a side effect, we have to subst CFLAGS ourselves. m4_rename([_AC_ARG_VAR_PRECIOUS],[backtrace_PRECIOUS]) m4_define([_AC_ARG_VAR_PRECIOUS],[]) AC_PROG_CC m4_rename_force([backtrace_PRECIOUS],[_AC_ARG_VAR_PRECIOUS]) AC_SUBST(CFLAGS) AC_PROG_RANLIB AC_PROG_AWK case "$AWK" in "") AC_MSG_ERROR([can't build without awk]) ;; esac AC_CHECK_PROG(DWZ, dwz, dwz) AM_CONDITIONAL(HAVE_DWZ, test "$DWZ" != "") LT_INIT AM_PROG_LIBTOOL AC_SYS_LARGEFILE backtrace_supported=yes if test -n "${with_target_subdir}"; then # We are compiling a GCC library. We can assume that the unwind # library exists. BACKTRACE_FILE="backtrace.lo simple.lo" else AC_CHECK_HEADER([unwind.h], [AC_CHECK_FUNC([_Unwind_Backtrace], [BACKTRACE_FILE="backtrace.lo simple.lo"], [BACKTRACE_FILE="nounwind.lo" backtrace_supported=no])], [BACKTRACE_FILE="nounwind.lo" backtrace_supported=no]) fi AC_SUBST(BACKTRACE_FILE) EXTRA_FLAGS= if test -n "${with_target_subdir}"; then EXTRA_FLAGS="-funwind-tables -frandom-seed=\$@" else AC_CACHE_CHECK([for -funwind-tables option], [libbacktrace_cv_c_unwind_tables], [CFLAGS_hold="$CFLAGS" CFLAGS="$CFLAGS -funwind-tables" AC_COMPILE_IFELSE( [AC_LANG_PROGRAM([static int f() { return 0; }], [return f();])], [libbacktrace_cv_c_unwind_tables=yes], [libbacktrace_cv_c_unwind_tables=no]) CFLAGS="$CFLAGS_hold"]) if test "$libbacktrace_cv_c_unwind_tables" = "yes"; then EXTRA_FLAGS=-funwind-tables fi AC_CACHE_CHECK([for -frandom-seed=string option], [libbacktrace_cv_c_random_seed_string], [CFLAGS_hold="$CFLAGS" CFLAGS="$CFLAGS -frandom-seed=conftest.lo" AC_COMPILE_IFELSE( [AC_LANG_PROGRAM([], [return 0;])], [libbacktrace_cv_c_random_seed_string=yes], [libbacktrace_cv_c_random_seed_string=no]) CFLAGS="$CFLAGS_hold"]) if test "$libbacktrace_cv_c_random_seed_string" = "yes"; then EXTRA_FLAGS="$EXTRA_FLAGS -frandom-seed=\$@" fi fi if test -n "${with_target_subdir}"; then # Add CET specific flags is Intel CET is enabled. GCC_CET_FLAGS(CET_FLAGS) EXTRA_FLAGS="$EXTRA_FLAGS $CET_FLAGS" fi AC_SUBST(EXTRA_FLAGS) ACX_PROG_CC_WARNING_OPTS([-W -Wall -Wwrite-strings -Wstrict-prototypes \ -Wmissing-prototypes -Wold-style-definition \ -Wmissing-format-attribute -Wcast-qual], [WARN_FLAGS]) if test -n "${with_target_subdir}"; then WARN_FLAGS="$WARN_FLAGS -Werror" fi AC_SUBST(WARN_FLAGS) if test -n "${with_target_subdir}"; then GCC_CHECK_UNWIND_GETIPINFO else ac_save_CFFLAGS="$CFLAGS" CFLAGS="$CFLAGS -Werror-implicit-function-declaration" AC_MSG_CHECKING([for _Unwind_GetIPInfo]) AC_LINK_IFELSE( [AC_LANG_PROGRAM( [#include "unwind.h" struct _Unwind_Context *context; int ip_before_insn = 0;], [return _Unwind_GetIPInfo (context, &ip_before_insn);])], [have_unwind_getipinfo=yes], [have_unwind_getipinfo=no]) CFLAGS="$ac_save_CFLAGS" AC_MSG_RESULT([$have_unwind_getipinfo]) if test "$have_unwind_getipinfo" = "yes"; then AC_DEFINE(HAVE_GETIPINFO, 1, [Define if _Unwind_GetIPInfo is available.]) fi fi # Enable --enable-host-shared. AC_ARG_ENABLE(host-shared, [AS_HELP_STRING([--enable-host-shared], [build host code as shared libraries])], [PIC_FLAG=-fPIC], [PIC_FLAG=]) AC_SUBST(PIC_FLAG) # Test for __sync support. AC_CACHE_CHECK([__sync extensions], [libbacktrace_cv_sys_sync], [if test -n "${with_target_subdir}"; then case "${host}" in hppa*-*-hpux*) libbacktrace_cv_sys_sync=no ;; *) libbacktrace_cv_sys_sync=yes ;; esac else AC_LINK_IFELSE( [AC_LANG_PROGRAM([int i;], [__sync_bool_compare_and_swap (&i, i, i); __sync_lock_test_and_set (&i, 1); __sync_lock_release (&i);])], [libbacktrace_cv_sys_sync=yes], [libbacktrace_cv_sys_sync=no]) fi]) BACKTRACE_SUPPORTS_THREADS=0 if test "$libbacktrace_cv_sys_sync" = "yes"; then BACKTRACE_SUPPORTS_THREADS=1 AC_DEFINE([HAVE_SYNC_FUNCTIONS], 1, [Define to 1 if you have the __sync functions]) fi AC_SUBST(BACKTRACE_SUPPORTS_THREADS) # Test for __atomic support. AC_CACHE_CHECK([__atomic extensions], [libbacktrace_cv_sys_atomic], [if test -n "${with_target_subdir}"; then libbacktrace_cv_sys_atomic=yes else AC_LINK_IFELSE( [AC_LANG_PROGRAM([int i;], [__atomic_load_n (&i, __ATOMIC_ACQUIRE); __atomic_store_n (&i, 1, __ATOMIC_RELEASE);])], [libbacktrace_cv_sys_atomic=yes], [libbacktrace_cv_sys_atomic=no]) fi]) if test "$libbacktrace_cv_sys_atomic" = "yes"; then AC_DEFINE([HAVE_ATOMIC_FUNCTIONS], 1, [Define to 1 if you have the __atomic functions]) fi # The library needs to be able to read the executable itself. Compile # a file to determine the executable format. The awk script # filetype.awk prints out the file type. AC_CACHE_CHECK([output filetype], [libbacktrace_cv_sys_filetype], [filetype= AC_COMPILE_IFELSE( [AC_LANG_PROGRAM([int i;], [int j;])], [filetype=`${AWK} -f $srcdir/filetype.awk conftest.$ac_objext`], [AC_MSG_FAILURE([compiler failed])]) libbacktrace_cv_sys_filetype=$filetype]) # Match the file type to decide what files to compile. FORMAT_FILE= backtrace_supports_data=yes case "$libbacktrace_cv_sys_filetype" in elf*) FORMAT_FILE="elf.lo" ;; pecoff) FORMAT_FILE="pecoff.lo" backtrace_supports_data=no ;; xcoff*) FORMAT_FILE="xcoff.lo" backtrace_supports_data=no ;; *) AC_MSG_WARN([could not determine output file type]) FORMAT_FILE="unknown.lo" backtrace_supported=no ;; esac AC_SUBST(FORMAT_FILE) # ELF defines. elfsize= case "$libbacktrace_cv_sys_filetype" in elf32) elfsize=32 ;; elf64) elfsize=64 ;; *) elfsize=unused esac AC_DEFINE_UNQUOTED([BACKTRACE_ELF_SIZE], [$elfsize], [ELF size: 32 or 64]) # XCOFF defines. xcoffsize= case "$libbacktrace_cv_sys_filetype" in xcoff32) xcoffsize=32 ;; xcoff64) xcoffsize=64 ;; *) xcoffsize=unused esac AC_DEFINE_UNQUOTED([BACKTRACE_XCOFF_SIZE], [$xcoffsize], [XCOFF size: 32 or 64]) BACKTRACE_SUPPORTED=0 if test "$backtrace_supported" = "yes"; then BACKTRACE_SUPPORTED=1 fi AC_SUBST(BACKTRACE_SUPPORTED) BACKTRACE_SUPPORTS_DATA=0 if test "$backtrace_supports_data" = "yes"; then BACKTRACE_SUPPORTS_DATA=1 fi AC_SUBST(BACKTRACE_SUPPORTS_DATA) GCC_HEADER_STDINT(gstdint.h) AC_CHECK_HEADERS(sys/mman.h) if test "$ac_cv_header_sys_mman_h" = "no"; then have_mmap=no else if test -n "${with_target_subdir}"; then # When built as a GCC target library, we can't do a link test. We # simply assume that if we have mman.h, we have mmap. have_mmap=yes case "${host}" in spu-*-*|*-*-msdosdjgpp) # The SPU does not have mmap, but it has a sys/mman.h header file # containing "mmap_eaddr" and the mmap flags, confusing the test. # DJGPP also has sys/man.h, but no mmap have_mmap=no ;; esac else AC_CHECK_FUNC(mmap, [have_mmap=yes], [have_mmap=no]) fi fi if test "$have_mmap" = "no"; then VIEW_FILE=read.lo ALLOC_FILE=alloc.lo else VIEW_FILE=mmapio.lo AC_PREPROC_IFELSE([AC_LANG_SOURCE([ #include #if !defined(MAP_ANONYMOUS) && !defined(MAP_ANON) #error no MAP_ANONYMOUS #endif ])], [ALLOC_FILE=mmap.lo], [ALLOC_FILE=alloc.lo]) fi AC_SUBST(VIEW_FILE) AC_SUBST(ALLOC_FILE) BACKTRACE_USES_MALLOC=0 if test "$ALLOC_FILE" = "alloc.lo"; then BACKTRACE_USES_MALLOC=1 fi AC_SUBST(BACKTRACE_USES_MALLOC) # Check for dl_iterate_phdr. AC_CHECK_HEADERS(link.h) if test "$ac_cv_header_link_h" = "no"; then have_dl_iterate_phdr=no else if test -n "${with_target_subdir}"; then # When built as a GCC target library, we can't do a link test. AC_EGREP_HEADER([dl_iterate_phdr], [link.h], [have_dl_iterate_phdr=yes], [have_dl_iterate_phdr=no]) case "${host}" in *-*-solaris2.10*) # Avoid dl_iterate_phdr on Solaris 10, where it is in the # header file but is only in -ldl. have_dl_iterate_phdr=no ;; esac else AC_CHECK_FUNC([dl_iterate_phdr], [have_dl_iterate_phdr=yes], [have_dl_iterate_phdr=no]) fi fi if test "$have_dl_iterate_phdr" = "yes"; then AC_DEFINE(HAVE_DL_ITERATE_PHDR, 1, [Define if dl_iterate_phdr is available.]) fi # Check for loadquery. AC_CHECK_HEADERS(sys/ldr.h) if test "$ac_cv_header_sys_ldr_h" = "no"; then have_loadquery=no else if test -n "${with_target_subdir}"; then # When built as a GCC target library, we can't do a link test. AC_EGREP_HEADER([loadquery], [sys/ldr.h], [have_loadquery=yes], [have_loadquery=no]) else AC_CHECK_FUNC([loadquery], [have_loadquery=yes], [have_loadquery=no]) fi fi if test "$have_loadquery" = "yes"; then AC_DEFINE(HAVE_LOADQUERY, 1, [Define if AIX loadquery is available.]) fi # Check for the fcntl function. if test -n "${with_target_subdir}"; then case "${host}" in *-*-mingw*) have_fcntl=no ;; spu-*-*) have_fcntl=no ;; *) have_fcntl=yes ;; esac else AC_CHECK_FUNC(fcntl, [have_fcntl=yes], [have_fcntl=no]) fi if test "$have_fcntl" = "yes"; then AC_DEFINE([HAVE_FCNTL], 1, [Define to 1 if you have the fcntl function]) fi AC_CHECK_DECLS(strnlen) AC_CHECK_FUNCS(lstat readlink) # Check for getexecname function. if test -n "${with_target_subdir}"; then case "${host}" in *-*-solaris2*) have_getexecname=yes ;; *) have_getexecname=no ;; esac else AC_CHECK_FUNC(getexecname, [have_getexecname=yes], [have_getexecname=no]) fi if test "$have_getexecname" = "yes"; then AC_DEFINE(HAVE_GETEXECNAME, 1, [Define if getexecname is available.]) fi # Check for the clock_gettime function. AC_CHECK_FUNCS(clock_gettime) clock_gettime_link= # At least for glibc, clock_gettime is in librt. But don't # pull that in if it still doesn't give us the function we want. This # test is copied from libgomp, and modified to not link in -lrt as # we're using this for test timing only. if test "$ac_cv_func_clock_gettime" = no; then AC_CHECK_LIB(rt, clock_gettime, [CLOCK_GETTIME_LINK=-lrt AC_DEFINE(HAVE_CLOCK_GETTIME, 1, [Define to 1 if you have the `clock_gettime' function.])]) fi AC_SUBST(CLOCK_GETTIME_LINK) dnl Test whether the compiler supports the -pthread option. AC_CACHE_CHECK([whether -pthread is supported], [libgo_cv_lib_pthread], [CFLAGS_hold=$CFLAGS CFLAGS="$CFLAGS -pthread" AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])], [libgo_cv_lib_pthread=yes], [libgo_cv_lib_pthread=no]) CFLAGS=$CFLAGS_hold]) PTHREAD_CFLAGS= if test "$libgo_cv_lib_pthread" = yes; then PTHREAD_CFLAGS=-pthread fi AC_SUBST(PTHREAD_CFLAGS) AM_CONDITIONAL(HAVE_PTHREAD, test "$libgo_cv_lib_pthread" = yes) AC_CHECK_LIB([z], [compress], [AC_DEFINE(HAVE_ZLIB, 1, [Define if -lz is available.])]) AM_CONDITIONAL(HAVE_ZLIB, test "$ac_cv_lib_z_compress" = yes) dnl Test whether the linker supports the --compress_debug_sections option. AC_CACHE_CHECK([whether --compress-debug-sections is supported], [libgo_cv_ld_compress], [LDFLAGS_hold=$LDFLAGS LDFLAGS="$LDFLAGS -Wl,--compress-debug-sections=zlib-gnu" AC_LINK_IFELSE([AC_LANG_PROGRAM(,)], [libgo_cv_ld_compress=yes], [libgo_cv_ld_compress=no]) LDFLAGS=$LDFLAGS_hold]) AM_CONDITIONAL(HAVE_COMPRESSED_DEBUG, test "$libgo_cv_ld_compress" = yes) AC_ARG_VAR(OBJCOPY, [location of objcopy]) AC_CHECK_PROG(OBJCOPY, objcopy, objcopy,) AC_CACHE_CHECK([whether objcopy supports debuglink], [libbacktrace_cv_objcopy_debuglink], [if test -n "${with_target_subdir}"; then libbacktrace_cv_objcopy_debuglink=no elif ${OBJCOPY} --add-gnu-debuglink=x /bin/ls /tmp/ls$$; then rm -f /tmp/ls$$ libbacktrace_cv_objcopy_debuglink=yes else libbacktrace_cv_objcopy_debuglink=no fi]) AM_CONDITIONAL(HAVE_OBJCOPY_DEBUGLINK, test "$libbacktrace_cv_objcopy_debuglink" = yes) AC_CACHE_CHECK([whether tests can run], [libbacktrace_cv_sys_native], [AC_RUN_IFELSE([AC_LANG_PROGRAM([], [return 0;])], [libbacktrace_cv_sys_native=yes], [libbacktrace_cv_sys_native=no], [libbacktrace_cv_sys_native=no])]) AM_CONDITIONAL(NATIVE, test "$libbacktrace_cv_sys_native" = "yes") if test "${multilib}" = "yes"; then multilib_arg="--enable-multilib" else multilib_arg= fi AC_CONFIG_FILES(Makefile backtrace-supported.h) # We need multilib support, but only if configuring for the target. AC_CONFIG_COMMANDS([default], [if test -n "$CONFIG_FILES"; then if test -n "${with_target_subdir}"; then # Multilibs need MULTISUBDIR defined correctly in certain makefiles so # that multilib installs will end up installed in the correct place. # The testsuite needs it for multilib-aware ABI baseline files. # To work around this not being passed down from config-ml.in -> # srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually # append it here. Only modify Makefiles that have just been created. # # Also, get rid of this simulated-VPATH thing that automake does. cat > vpsed << \_EOF s!`test -f '$<' || echo '$(srcdir)/'`!! _EOF for i in $SUBDIRS; do case $CONFIG_FILES in *${i}/Makefile*) #echo "Adding MULTISUBDIR to $i/Makefile" sed -f vpsed $i/Makefile > tmp grep '^MULTISUBDIR =' Makefile >> tmp mv tmp $i/Makefile ;; esac done rm vpsed fi fi ], [ # Variables needed in config.status (file generation) which aren't already # passed by autoconf. SUBDIRS="$SUBDIRS" ]) AC_OUTPUT