405a6b1c93
2015-01-24 Matthias Klose <doko@ubuntu.com>
* configure.ac: Move AM_ENABLE_MULTILIB before AC_PROG_CC.
* configure: Regenerate.
From-SVN: r220075
395 lines
12 KiB
Plaintext
395 lines
12 KiB
Plaintext
# configure.ac -- Backtrace configure script.
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# Copyright (C) 2012-2015 Free Software Foundation, Inc.
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are
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# met:
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# (1) Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# (2) Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in
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# the documentation and/or other materials provided with the
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# distribution.
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# (3) The name of the author may not be used to
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# endorse or promote products derived from this software without
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# specific prior written permission.
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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# DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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# INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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# STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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# IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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AC_PREREQ(2.64)
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AC_INIT(package-unused, version-unused,, libbacktrace)
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AC_CONFIG_SRCDIR(backtrace.h)
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AC_CONFIG_HEADER(config.h)
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if test -n "${with_target_subdir}"; then
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AM_ENABLE_MULTILIB(, ..)
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fi
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AC_CANONICAL_SYSTEM
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target_alias=${target_alias-$host_alias}
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AC_USE_SYSTEM_EXTENSIONS
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libtool_VERSION=1:0:0
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AC_SUBST(libtool_VERSION)
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# 1.11.1: Require that version of automake.
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# foreign: Don't require README, INSTALL, NEWS, etc.
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# no-define: Don't define PACKAGE and VERSION.
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# no-dependencies: Don't generate automatic dependencies.
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# (because it breaks when using bootstrap-lean, since some of the
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# headers are gone at "make install" time).
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# -Wall: Issue all automake warnings.
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# -Wno-portability: Don't warn about constructs supported by GNU make.
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# (because GCC requires GNU make anyhow).
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AM_INIT_AUTOMAKE([1.11.1 foreign no-dist no-define no-dependencies -Wall -Wno-portability])
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AM_MAINTAINER_MODE
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AC_ARG_WITH(target-subdir,
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[ --with-target-subdir=SUBDIR Configuring in a subdirectory for target])
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# We must force CC to /not/ be precious variables; otherwise
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# the wrong, non-multilib-adjusted value will be used in multilibs.
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# As a side effect, we have to subst CFLAGS ourselves.
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m4_rename([_AC_ARG_VAR_PRECIOUS],[backtrace_PRECIOUS])
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m4_define([_AC_ARG_VAR_PRECIOUS],[])
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AC_PROG_CC
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m4_rename_force([backtrace_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
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AC_SUBST(CFLAGS)
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AC_PROG_RANLIB
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AC_PROG_AWK
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case "$AWK" in
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"") AC_MSG_ERROR([can't build without awk]) ;;
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esac
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LT_INIT([disable-shared])
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AM_PROG_LIBTOOL
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backtrace_supported=yes
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if test -n "${with_target_subdir}"; then
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# We are compiling a GCC library. We can assume that the unwind
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# library exists.
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BACKTRACE_FILE="backtrace.lo simple.lo"
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else
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AC_CHECK_HEADER([unwind.h],
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[AC_CHECK_FUNC([_Unwind_Backtrace],
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[BACKTRACE_FILE="backtrace.lo simple.lo"],
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[BACKTRACE_FILE="nounwind.lo"
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backtrace_supported=no])],
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[BACKTRACE_FILE="nounwind.lo"
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backtrace_supported=no])
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fi
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AC_SUBST(BACKTRACE_FILE)
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EXTRA_FLAGS=
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if test -n "${with_target_subdir}"; then
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EXTRA_FLAGS="-funwind-tables -frandom-seed=\$@"
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else
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AC_CACHE_CHECK([for -funwind-tables option],
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[libbacktrace_cv_c_unwind_tables],
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[CFLAGS_hold="$CFLAGS"
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CFLAGS="$CFLAGS -funwind-tables"
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AC_COMPILE_IFELSE(
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[AC_LANG_PROGRAM([static int f() { return 0; }], [return f();])],
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[libbacktrace_cv_c_unwind_tables=yes],
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[libbacktrace_cv_c_unwind_tables=no])
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CFLAGS="$CFLAGS_hold"])
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if test "$libbacktrace_cv_c_unwind_tables" = "yes"; then
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EXTRA_FLAGS=-funwind-tables
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fi
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AC_CACHE_CHECK([for -frandom-seed=string option],
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[libbacktrace_cv_c_random_seed_string],
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[CFLAGS_hold="$CFLAGS"
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CFLAGS="$CFLAGS -frandom-seed=conftest.lo"
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AC_COMPILE_IFELSE(
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[AC_LANG_PROGRAM([], [return 0;])],
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[libbacktrace_cv_c_random_seed_string=yes],
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[libbacktrace_cv_c_random_seed_string=no])
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CFLAGS="$CFLAGS_hold"])
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if test "$libbacktrace_cv_c_random_seed_string" = "yes"; then
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EXTRA_FLAGS="$EXTRA_FLAGS -frandom-seed=\$@"
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fi
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fi
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AC_SUBST(EXTRA_FLAGS)
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ACX_PROG_CC_WARNING_OPTS([-W -Wall -Wwrite-strings -Wstrict-prototypes \
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-Wmissing-prototypes -Wold-style-definition \
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-Wmissing-format-attribute -Wcast-qual],
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[WARN_FLAGS])
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if test -n "${with_target_subdir}"; then
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WARN_FLAGS="$WARN_FLAGS -Werror"
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fi
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AC_SUBST(WARN_FLAGS)
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if test -n "${with_target_subdir}"; then
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GCC_CHECK_UNWIND_GETIPINFO
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else
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ac_save_CFFLAGS="$CFLAGS"
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CFLAGS="$CFLAGS -Werror-implicit-function-declaration"
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AC_MSG_CHECKING([for _Unwind_GetIPInfo])
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AC_LINK_IFELSE(
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[AC_LANG_PROGRAM(
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[#include "unwind.h"
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struct _Unwind_Context *context;
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int ip_before_insn = 0;],
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[return _Unwind_GetIPInfo (context, &ip_before_insn);])],
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[have_unwind_getipinfo=yes], [have_unwind_getipinfo=no])
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CFLAGS="$ac_save_CFLAGS"
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AC_MSG_RESULT([$have_unwind_getipinfo])
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if test "$have_unwind_getipinfo" = "yes"; then
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AC_DEFINE(HAVE_GETIPINFO, 1, [Define if _Unwind_GetIPInfo is available.])
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fi
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fi
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# When building as a target library, shared libraries may want to link
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# this in. We don't want to provide another shared library to
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# complicate dependencies. Instead, we just compile with -fPIC.
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PIC_FLAG=
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if test -n "${with_target_subdir}"; then
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PIC_FLAG=-fPIC
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fi
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# Similarly, use -fPIC with --enable-host-shared:
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AC_ARG_ENABLE(host-shared,
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[AS_HELP_STRING([--enable-host-shared],
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[build host code as shared libraries])],
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[PIC_FLAG=-fPIC], [])
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AC_SUBST(PIC_FLAG)
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# Test for __sync support.
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AC_CACHE_CHECK([__sync extensions],
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[libbacktrace_cv_sys_sync],
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[if test -n "${with_target_subdir}"; then
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libbacktrace_cv_sys_sync=yes
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else
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AC_LINK_IFELSE(
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[AC_LANG_PROGRAM([int i;],
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[__sync_bool_compare_and_swap (&i, i, i);
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__sync_lock_test_and_set (&i, 1);
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__sync_lock_release (&i);])],
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[libbacktrace_cv_sys_sync=yes],
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[libbacktrace_cv_sys_sync=no])
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fi])
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BACKTRACE_SUPPORTS_THREADS=0
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if test "$libbacktrace_cv_sys_sync" = "yes"; then
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BACKTRACE_SUPPORTS_THREADS=1
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AC_DEFINE([HAVE_SYNC_FUNCTIONS], 1,
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[Define to 1 if you have the __sync functions])
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fi
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AC_SUBST(BACKTRACE_SUPPORTS_THREADS)
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# Test for __atomic support.
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AC_CACHE_CHECK([__atomic extensions],
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[libbacktrace_cv_sys_atomic],
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[if test -n "${with_target_subdir}"; then
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libbacktrace_cv_sys_atomic=yes
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else
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AC_LINK_IFELSE(
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[AC_LANG_PROGRAM([int i;],
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[__atomic_load_n (&i, __ATOMIC_ACQUIRE);
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__atomic_store_n (&i, 1, __ATOMIC_RELEASE);])],
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[libbacktrace_cv_sys_atomic=yes],
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[libbacktrace_cv_sys_atomic=no])
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fi])
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if test "$libbacktrace_cv_sys_atomic" = "yes"; then
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AC_DEFINE([HAVE_ATOMIC_FUNCTIONS], 1,
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[Define to 1 if you have the __atomic functions])
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fi
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# The library needs to be able to read the executable itself. Compile
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# a file to determine the executable format. The awk script
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# filetype.awk prints out the file type.
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AC_CACHE_CHECK([output filetype],
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[libbacktrace_cv_sys_filetype],
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[filetype=
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AC_COMPILE_IFELSE(
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[AC_LANG_PROGRAM([int i;], [int j;])],
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[filetype=`${AWK} -f $srcdir/filetype.awk conftest.$ac_objext`],
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[AC_MSG_FAILURE([compiler failed])])
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libbacktrace_cv_sys_filetype=$filetype])
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# Match the file type to decide what files to compile.
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FORMAT_FILE=
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case "$libbacktrace_cv_sys_filetype" in
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elf*) FORMAT_FILE="elf.lo" ;;
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*) AC_MSG_WARN([could not determine output file type])
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FORMAT_FILE="unknown.lo"
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backtrace_supported=no
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;;
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esac
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AC_SUBST(FORMAT_FILE)
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# ELF defines.
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elfsize=
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case "$libbacktrace_cv_sys_filetype" in
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elf32) elfsize=32 ;;
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elf64) elfsize=64 ;;
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esac
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AC_DEFINE_UNQUOTED([BACKTRACE_ELF_SIZE], [$elfsize], [ELF size: 32 or 64])
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BACKTRACE_SUPPORTED=0
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if test "$backtrace_supported" = "yes"; then
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BACKTRACE_SUPPORTED=1
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fi
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AC_SUBST(BACKTRACE_SUPPORTED)
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GCC_HEADER_STDINT(gstdint.h)
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AC_CHECK_HEADERS(sys/mman.h)
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if test "$ac_cv_header_sys_mman_h" = "no"; then
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have_mmap=no
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else
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if test -n "${with_target_subdir}"; then
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# When built as a GCC target library, we can't do a link test. We
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# simply assume that if we have mman.h, we have mmap.
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have_mmap=yes
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else
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AC_CHECK_FUNC(mmap, [have_mmap=yes], [have_mmap=no])
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fi
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fi
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if test "$have_mmap" = "no"; then
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VIEW_FILE=read.lo
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ALLOC_FILE=alloc.lo
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else
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VIEW_FILE=mmapio.lo
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AC_PREPROC_IFELSE([
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#include <sys/mman.h>
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#if !defined(MAP_ANONYMOUS) && !defined(MAP_ANON)
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#error no MAP_ANONYMOUS
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#endif
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], [ALLOC_FILE=mmap.lo], [ALLOC_FILE=alloc.lo])
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fi
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AC_SUBST(VIEW_FILE)
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AC_SUBST(ALLOC_FILE)
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BACKTRACE_USES_MALLOC=0
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if test "$ALLOC_FILE" = "alloc.lo"; then
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BACKTRACE_USES_MALLOC=1
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fi
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AC_SUBST(BACKTRACE_USES_MALLOC)
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# Check for dl_iterate_phdr.
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AC_CHECK_HEADERS(link.h)
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if test "$ac_cv_header_link_h" = "no"; then
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have_dl_iterate_phdr=no
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else
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if test -n "${with_target_subdir}"; then
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# When built as a GCC target library, we can't do a link test.
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AC_EGREP_HEADER([dl_iterate_phdr], [link.h], [have_dl_iterate_phdr=yes],
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[have_dl_iterate_phdr=no])
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case "${host}" in
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*-*-solaris2.10*)
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# Avoid dl_iterate_phdr on Solaris 10, where it is in the
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# header file but is only in -ldl.
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have_dl_iterate_phdr=no ;;
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esac
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else
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AC_CHECK_FUNC([dl_iterate_phdr], [have_dl_iterate_phdr=yes],
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[have_dl_iterate_phdr=no])
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fi
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fi
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if test "$have_dl_iterate_phdr" = "yes"; then
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AC_DEFINE(HAVE_DL_ITERATE_PHDR, 1, [Define if dl_iterate_phdr is available.])
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fi
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# Check for the fcntl function.
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if test -n "${with_target_subdir}"; then
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case "${host}" in
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*-*-mingw*) have_fcntl=no ;;
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*) have_fcntl=yes ;;
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esac
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else
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AC_CHECK_FUNC(fcntl, [have_fcntl=yes], [have_fcntl=no])
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fi
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if test "$have_fcntl" = "yes"; then
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AC_DEFINE([HAVE_FCNTL], 1,
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[Define to 1 if you have the fcntl function])
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fi
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AC_CHECK_DECLS(strnlen)
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# Check for getexecname function.
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if test -n "${with_target_subdir}"; then
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case "${host}" in
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*-*-solaris2*) have_getexecname=yes ;;
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*) have_getexecname=no ;;
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esac
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else
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AC_CHECK_FUNC(getexecname, [have_getexecname=yes], [have_getexecname=no])
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fi
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if test "$have_getexecname" = "yes"; then
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AC_DEFINE(HAVE_GETEXECNAME, 1, [Define if getexecname is available.])
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fi
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AC_CACHE_CHECK([whether tests can run],
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[libbacktrace_cv_sys_native],
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[AC_RUN_IFELSE([AC_LANG_PROGRAM([], [return 0;])],
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[libbacktrace_cv_sys_native=yes],
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[libbacktrace_cv_sys_native=no],
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[libbacktrace_cv_sys_native=no])])
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AM_CONDITIONAL(NATIVE, test "$libbacktrace_cv_sys_native" = "yes")
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if test "${multilib}" = "yes"; then
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multilib_arg="--enable-multilib"
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else
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multilib_arg=
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fi
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AC_CONFIG_FILES(Makefile backtrace-supported.h)
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# We need multilib support, but only if configuring for the target.
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AC_CONFIG_COMMANDS([default],
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[if test -n "$CONFIG_FILES"; then
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if test -n "${with_target_subdir}"; then
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# Multilibs need MULTISUBDIR defined correctly in certain makefiles so
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# that multilib installs will end up installed in the correct place.
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# The testsuite needs it for multilib-aware ABI baseline files.
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# To work around this not being passed down from config-ml.in ->
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# srcdir/Makefile.am -> srcdir/{src,libsupc++,...}/Makefile.am, manually
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# append it here. Only modify Makefiles that have just been created.
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#
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# Also, get rid of this simulated-VPATH thing that automake does.
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cat > vpsed << \_EOF
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s!`test -f '$<' || echo '$(srcdir)/'`!!
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_EOF
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for i in $SUBDIRS; do
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case $CONFIG_FILES in
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*${i}/Makefile*)
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#echo "Adding MULTISUBDIR to $i/Makefile"
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sed -f vpsed $i/Makefile > tmp
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grep '^MULTISUBDIR =' Makefile >> tmp
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mv tmp $i/Makefile
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;;
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esac
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done
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rm vpsed
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fi
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fi
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],
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[
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# Variables needed in config.status (file generation) which aren't already
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# passed by autoconf.
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SUBDIRS="$SUBDIRS"
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])
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AC_OUTPUT
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