mirror of git://gcc.gnu.org/git/gcc.git
265 lines
8.9 KiB
Plaintext
265 lines
8.9 KiB
Plaintext
# Process this file with autoreconf to produce a configure script.
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# Copyright (C) 2012-2015 Free Software Foundation, Inc.
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#
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# This file is part of the GNU Atomic Library (libatomic).
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#
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# Libatomic is free software; you can redistribute it and/or modify it
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# under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# Libatomic is distributed in the hope that it will be useful, but WITHOUT ANY
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# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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# FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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# more details.
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#
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# Under Section 7 of GPL version 3, you are granted additional
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# permissions described in the GCC Runtime Library Exception, version
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# 3.1, as published by the Free Software Foundation.
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#
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# You should have received a copy of the GNU General Public License and
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# a copy of the GCC Runtime Library Exception along with this program;
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# see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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# <http://www.gnu.org/licenses/>.
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AC_PREREQ(2.59)
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AC_INIT([GNU Atomic Library], 1.0,,[libatomic])
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AC_CONFIG_HEADER(auto-config.h)
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# -------
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# Options
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# -------
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AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
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LIBAT_ENABLE(version-specific-runtime-libs, no, ,
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[Specify that runtime libraries should be installed in a compiler-specific directory],
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permit yes|no)
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AC_MSG_RESULT($enable_version_specific_runtime_libs)
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# We would like our source tree to be readonly. However when releases or
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# pre-releases are generated, the flex/bison generated files as well as the
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# various formats of manuals need to be included along with the rest of the
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# sources. Therefore we have --enable-generated-files-in-srcdir to do
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# just that.
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AC_MSG_CHECKING([for --enable-generated-files-in-srcdir])
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LIBAT_ENABLE(generated-files-in-srcdir, no, ,
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[put copies of generated files in source dir intended for creating source
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tarballs for users without texinfo bison or flex.],
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permit yes|no)
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AC_MSG_RESULT($enable_generated_files_in_srcdir)
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AM_CONDITIONAL(GENINSRC, test "$enable_generated_files_in_srcdir" = yes)
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# -------
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# Gets build, host, target, *_vendor, *_cpu, *_os, etc.
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#
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# You will slowly go insane if you do not grok the following fact: when
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# building this library, the top-level /target/ becomes the library's /host/.
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#
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# configure then causes --target to default to --host, exactly like any
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# other package using autoconf. Therefore, 'target' and 'host' will
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# always be the same. This makes sense both for native and cross compilers
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# just think about it for a little while. :-)
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#
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# Also, if this library is being configured as part of a cross compiler, the
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# top-level configure script will pass the "real" host as $with_cross_host.
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#
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# Do not delete or change the following two lines. For why, see
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# http://gcc.gnu.org/ml/libstdc++/2003-07/msg00451.html
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AC_CANONICAL_SYSTEM
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target_alias=${target_alias-$host_alias}
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# Sets up automake. Must come after AC_CANONICAL_SYSTEM. Each of the
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# following is magically included in AUTOMAKE_OPTIONS in each Makefile.am.
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# 1.9.0: minimum required version
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# no-define: PACKAGE and VERSION will not be #define'd in config.h (a bunch
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# of other PACKAGE_* variables will, however, and there's nothing
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# we can do about that; they come from AC_INIT).
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# no-dist: we don't want 'dist' and related rules.
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# foreign: we don't follow the normal rules for GNU packages (no COPYING
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# file in the top srcdir, etc, etc), so stop complaining.
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# -Wall: turns on all automake warnings...
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# -Wno-portability: ...except this one, since GNU make is required.
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# -Wno-override: ... and this one, since we do want this in testsuite.
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AM_INIT_AUTOMAKE([1.9.0 foreign no-dist -Wall -Wno-portability -Wno-override])
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AM_ENABLE_MULTILIB(, ..)
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# Calculate toolexeclibdir
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# Also toolexecdir, though it's only used in toolexeclibdir
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case ${enable_version_specific_runtime_libs} in
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yes)
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# Need the gcc compiler version to know where to install libraries
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# and header files if --enable-version-specific-runtime-libs option
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# is selected.
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toolexecdir='$(libdir)/gcc/$(target_alias)'
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toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)'
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;;
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no)
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if test -n "$with_cross_host" &&
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test x"$with_cross_host" != x"no"; then
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# Install a library built with a cross compiler in tooldir, not libdir.
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toolexecdir='$(exec_prefix)/$(target_alias)'
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toolexeclibdir='$(toolexecdir)/lib'
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else
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toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
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toolexeclibdir='$(libdir)'
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fi
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multi_os_directory=`$CC -print-multi-os-directory`
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case $multi_os_directory in
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.) ;; # Avoid trailing /.
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*) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
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esac
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;;
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esac
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AC_SUBST(toolexecdir)
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AC_SUBST(toolexeclibdir)
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# Check the compiler.
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# The same as in boehm-gc and libstdc++. Have to borrow it from there.
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# We must force CC to /not/ be precious variables; otherwise
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# the wrong, non-multilib-adjusted value will be used in multilibs.
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# As a side effect, we have to subst CFLAGS ourselves.
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m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
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m4_define([_AC_ARG_VAR_PRECIOUS],[])
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AC_PROG_CC
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AM_PROG_AS
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m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
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AC_SUBST(CFLAGS)
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# In order to override CFLAGS_FOR_TARGET, all of our special flags go
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# in XCFLAGS. But we need them in CFLAGS during configury. So put them
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# in both places for now and restore CFLAGS at the end of config.
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save_CFLAGS="$CFLAGS"
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# Find other programs we need.
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AC_CHECK_TOOL(AR, ar)
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AC_CHECK_TOOL(NM, nm)
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AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error)
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AC_PATH_PROG(PERL, perl, perl-not-found-in-path-error)
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AC_PROG_INSTALL
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# Configure libtool
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AM_PROG_LIBTOOL
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ACX_LT_HOST_FLAGS
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AC_SUBST(enable_shared)
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AC_SUBST(enable_static)
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AM_MAINTAINER_MODE
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# For libtool versioning info, format is CURRENT:REVISION:AGE
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libtool_VERSION=2:0:1
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AC_SUBST(libtool_VERSION)
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# Check for used threading-model
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AC_MSG_CHECKING([for thread model used by GCC])
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target_thread_file=`$CC -v 2>&1 | sed -n 's/^Thread model: //p'`
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AC_MSG_RESULT([$target_thread_file])
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# Get target configury.
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. ${srcdir}/configure.tgt
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if test -n "$UNSUPPORTED"; then
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AC_MSG_ERROR([Configuration ${target} is unsupported.])
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fi
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# Disable fallbacks to __sync routines from libgcc. Otherwise we'll
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# make silly decisions about what the cpu can do.
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CFLAGS="$save_CFLAGS -fno-sync-libcalls $XCFLAGS"
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# Check header files.
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AC_STDC_HEADERS
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ACX_HEADER_STRING
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GCC_HEADER_STDINT(gstdint.h)
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AC_CHECK_HEADERS([fenv.h])
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# Check for common type sizes
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LIBAT_FORALL_MODES([LIBAT_HAVE_INT_MODE])
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# Check for compiler builtins of atomic operations.
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LIBAT_TEST_ATOMIC_INIT
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LIBAT_FORALL_MODES([LIBAT_HAVE_ATOMIC_LOADSTORE])
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LIBAT_FORALL_MODES([LIBAT_HAVE_ATOMIC_TAS])
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LIBAT_FORALL_MODES([LIBAT_HAVE_ATOMIC_EXCHANGE])
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LIBAT_FORALL_MODES([LIBAT_HAVE_ATOMIC_CAS])
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LIBAT_FORALL_MODES([LIBAT_HAVE_ATOMIC_FETCH_ADD])
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LIBAT_FORALL_MODES([LIBAT_HAVE_ATOMIC_FETCH_OP])
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AC_C_BIGENDIAN
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# I don't like the default behaviour of WORDS_BIGENDIAN undefined for LE.
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AH_BOTTOM(
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[#ifndef WORDS_BIGENDIAN
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#define WORDS_BIGENDIAN 0
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#endif])
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LIBAT_WORDSIZE
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# Check to see if -pthread or -lpthread is needed. Prefer the former.
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# In case the pthread.h system header is not found, this test will fail.
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case " $config_path " in
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*" posix "*)
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XPCFLAGS=""
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CFLAGS="$CFLAGS -pthread"
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AC_LINK_IFELSE(
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[AC_LANG_PROGRAM(
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[#include <pthread.h>
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void *g(void *d) { return NULL; }],
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[pthread_t t; pthread_create(&t,NULL,g,NULL);])],
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[XPCFLAGS=" -pthread"],
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[CFLAGS="$save_CFLAGS $XCFLAGS" LIBS="-lpthread $LIBS"
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AC_LINK_IFELSE(
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[AC_LANG_PROGRAM(
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[#include <pthread.h>
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void *g(void *d) { return NULL; }],
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[pthread_t t; pthread_create(&t,NULL,g,NULL);])],
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[],
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[AC_MSG_ERROR([Pthreads are required to build libatomic])])])
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CFLAGS="$save_CFLAGS $XPCFLAGS"
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;;
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esac
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# See what sort of export controls are available.
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LIBAT_CHECK_ATTRIBUTE_VISIBILITY
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LIBAT_CHECK_ATTRIBUTE_DLLEXPORT
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LIBAT_CHECK_ATTRIBUTE_ALIAS
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if test x$try_ifunc = xyes; then
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LIBAT_CHECK_IFUNC
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fi
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# Check linker support.
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LIBAT_ENABLE_SYMVERS
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# Cleanup and exit.
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CFLAGS="$save_CFLAGS"
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AC_CACHE_SAVE
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# Add -Wall -Werror if we are using GCC.
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if test "x$GCC" = "xyes"; then
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XCFLAGS="$XCFLAGS -Wall -Werror"
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fi
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XCFLAGS="$XCFLAGS $XPCFLAGS"
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AC_SUBST(config_path)
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AC_SUBST(XCFLAGS)
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AC_SUBST(XLDFLAGS)
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AC_SUBST(LIBS)
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AC_SUBST(SIZES)
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AM_CONDITIONAL(HAVE_IFUNC, test x$libat_cv_have_ifunc = xyes)
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AM_CONDITIONAL(ARCH_ARM_LINUX,
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[expr "$config_path" : ".* linux/arm .*" > /dev/null])
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AM_CONDITIONAL(ARCH_I386,
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[test "$ARCH" = x86 && test x$libat_cv_wordsize = x4])
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AM_CONDITIONAL(ARCH_X86_64,
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[test "$ARCH" = x86 && test x$libat_cv_wordsize = x8])
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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 testsuite/Makefile)
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AC_OUTPUT
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