| # configure.ac -- Backtrace configure script. |
| # Copyright (C) 2012-2014 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_PREREQ(2.64) |
| AC_INIT(package-unused, version-unused,, libbacktrace) |
| AC_CONFIG_SRCDIR(backtrace.h) |
| AC_CONFIG_HEADER(config.h) |
| |
| 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 "$AWK" in |
| "") AC_MSG_ERROR([can't build without awk]) ;; |
| esac |
| |
| LT_INIT([disable-shared]) |
| AM_PROG_LIBTOOL |
| |
| backtrace_supported=yes |
| |
| if test -n "${with_target_subdir}"; then |
| # We are compiling a GCC library. We can assume that the unwind |
| # library exists. |
| AM_ENABLE_MULTILIB(, ..) |
| 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 |
| 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 |
| |
| # When building as a target library, shared libraries may want to link |
| # this in. We don't want to provide another shared library to |
| # complicate dependencies. Instead, we just compile with -fPIC. |
| PIC_FLAG= |
| if test -n "${with_target_subdir}"; then |
| PIC_FLAG=-fPIC |
| fi |
| # Similarly, use -fPIC with --enable-host-shared: |
| AC_ARG_ENABLE(host-shared, |
| [AS_HELP_STRING([--enable-host-shared], |
| [build host code as shared libraries])], |
| [PIC_FLAG=-fPIC], []) |
| AC_SUBST(PIC_FLAG) |
| |
| # Test for __sync support. |
| AC_CACHE_CHECK([__sync extensions], |
| [libbacktrace_cv_sys_sync], |
| [if test -n "${with_target_subdir}"; then |
| libbacktrace_cv_sys_sync=yes |
| 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=$filetype]) |
| |
| # Match the file type to decide what files to compile. |
| FORMAT_FILE= |
| case "$libbacktrace_cv_sys_filetype" in |
| elf*) FORMAT_FILE="elf.lo" ;; |
| *) 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 "$libbacktrace_cv_sys_filetype" in |
| elf32) elfsize=32 ;; |
| elf64) elfsize=64 ;; |
| esac |
| AC_DEFINE_UNQUOTED([BACKTRACE_ELF_SIZE], [$elfsize], [ELF size: 32 or 64]) |
| |
| BACKTRACE_SUPPORTED=0 |
| if test "$backtrace_supported" = "yes"; then |
| BACKTRACE_SUPPORTED=1 |
| fi |
| AC_SUBST(BACKTRACE_SUPPORTED) |
| |
| GCC_HEADER_STDINT(gstdint.h) |
| |
| AC_CHECK_HEADERS(sys/mman.h) |
| if test "$ac_cv_header_sys_mman_h" = "no"; then |
| have_mmap=no |
| else |
| if test -n "${with_target_subdir}"; then |
| # When built as a GCC target library, we can't do a link test. We |
| # simply assume that if we have mman.h, we have mmap. |
| have_mmap=yes |
| else |
| AC_CHECK_FUNC(mmap, [have_mmap=yes], [have_mmap=no]) |
| fi |
| fi |
| if test "$have_mmap" = "no"; then |
| VIEW_FILE=read.lo |
| ALLOC_FILE=alloc.lo |
| else |
| VIEW_FILE=mmapio.lo |
| AC_PREPROC_IFELSE([ |
| #include <sys/mman.h> |
| #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 "$have_dl_iterate_phdr" = "yes"; then |
| AC_DEFINE(HAVE_DL_ITERATE_PHDR, 1, [Define if dl_iterate_phdr is available.]) |
| fi |
| |
| # Check for the fcntl function. |
| if test -n "${with_target_subdir}"; then |
| case "${host}" in |
| *-*-mingw*) have_fcntl=no ;; |
| *) have_fcntl=yes ;; |
| esac |
| else |
| AC_CHECK_FUNC(fcntl, [have_fcntl=yes], [have_fcntl=no]) |
| fi |
| if test "$have_fcntl" = "yes"; then |
| AC_DEFINE([HAVE_FCNTL], 1, |
| [Define to 1 if you have the fcntl function]) |
| fi |
| |
| AC_CHECK_DECLS(strnlen) |
| |
| # 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 "$have_getexecname" = "yes"; then |
| AC_DEFINE(HAVE_GETEXECNAME, 1, [Define if getexecname is available.]) |
| fi |
| |
| AC_CACHE_CHECK([whether tests can run], |
| [libbacktrace_cv_sys_native], |
| [AC_RUN_IFELSE([AC_LANG_PROGRAM([], [return 0;])], |
| [libbacktrace_cv_sys_native=yes], |
| [libbacktrace_cv_sys_native=no], |
| [libbacktrace_cv_sys_native=no])]) |
| AM_CONDITIONAL(NATIVE, test "$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 |