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fe5568e990
PR libgomp/26175 PR libgomp/26477 * configure.ac: If neither --enable-linux-futex nor --disable-linux-futex is passed, determine the default by checking for compiling and/or running against NPTL. With --enable-linux-futex, check if SYS_gettid and SYS_futex are defined. * configure: Rebuilt. From-SVN: r114809
316 lines
10 KiB
Plaintext
316 lines
10 KiB
Plaintext
# Process this file with autoconf to produce a configure script, like so:
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# aclocal -I ../config && autoconf && autoheader && automake
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AC_PREREQ(2.59)
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AC_INIT([GNU OpenMP Runtime Library], 1.0,,[libgomp])
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AC_CONFIG_HEADER(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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LIBGOMP_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($enable_version_specific_runtime_libs)
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AC_MSG_CHECKING([for --enable-linux-futex])
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LIBGOMP_ENABLE(linux-futex, default, ,
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[Use the Linux futex system call],
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permit yes|no|default)
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AC_MSG_RESULT($enable_linux_futex)
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# -------
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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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# 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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# no-dependencies: turns off auto dependency generation (just for now)
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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 -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/$multi_os_directory ;;
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esac
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;;
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esac
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AC_SUBST(toolexecdir)
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AC_SUBST(toolexeclibdir)
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# Check the compiler.
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# The same as in boehm-gc and libstdc++. Have to borrow it from there.
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# We must force CC to /not/ be precious variables; otherwise
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# the wrong, non-multilib-adjusted value will be used in multilibs.
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# As a side effect, we have to subst CFLAGS ourselves.
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m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
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m4_define([_AC_ARG_VAR_PRECIOUS],[])
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AC_PROG_CC
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m4_rename([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
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AC_SUBST(CFLAGS)
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# In order to override CFLAGS_FOR_TARGET, all of our special flags go
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# in XCFLAGS. But we need them in CFLAGS during configury. So put them
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# in both places for now and restore CFLAGS at the end of config.
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save_CFLAGS="$CFLAGS"
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# 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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# Find other programs we need.
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AC_CHECK_TOOL(AR, ar)
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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_MAKE_SET
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AC_PROG_INSTALL
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# Configure libtool
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AM_PROG_LIBTOOL
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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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# We need gfortran to compile parts of the library
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# We can't use AC_PROG_FC because it expects a fully working gfortran.
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#AC_PROG_FC(gfortran)
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FC="$GFORTRAN"
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AC_PROG_FC(gfortran)
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FCFLAGS="$FCFLAGS -Wall"
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# For libtool versioning info, format is CURRENT:REVISION:AGE
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libtool_VERSION=1:0:0
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AC_SUBST(libtool_VERSION)
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# Check header files.
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AC_STDC_HEADERS
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AC_HEADER_TIME
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AC_CHECK_HEADERS(unistd.h semaphore.h sys/loadavg.h sys/time.h)
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GCC_HEADER_STDINT(gstdint.h)
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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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XPCFLAGS=""
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CFLAGS="$CFLAGS -pthread"
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AC_LINK_IFELSE(
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[AC_LANG_PROGRAM(
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[#include <pthread.h>
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void *g(void *d) { return NULL; }],
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[pthread_t t; pthread_create(&t,NULL,g,NULL);])],
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[XPCFLAGS=" -Wc,-pthread"],
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[CFLAGS="$save_CFLAGS" LIBS="-lpthread $LIBS"
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AC_LINK_IFELSE(
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[AC_LANG_PROGRAM(
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[#include <pthread.h>
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void *g(void *d) { return NULL; }],
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[pthread_t t; pthread_create(&t,NULL,g,NULL);])],
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[],
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[AC_MSG_ERROR([Pthreads are required to build libgomp])])])
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# Check for functions needed.
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AC_CHECK_FUNCS(getloadavg clock_gettime)
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# Check for broken semaphore implementation on darwin.
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# sem_init returns: sem_init error: Function not implemented.
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case "$host" in
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*-darwin*)
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AC_DEFINE(HAVE_BROKEN_POSIX_SEMAPHORES, 1,
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Define if the POSIX Semaphores do not work on your system.)
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;;
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*-linux*)
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case "$enable_linux_futex" in
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default)
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# If headers don't have gettid/futex syscalls definition, then
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# default to no, otherwise there will be compile time failures.
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# Otherwise, default to yes. If we don't detect we are
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# compiled/linked against NPTL and not cross-compiling, check
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# if programs are run by default against NPTL and if not, issue
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# a warning.
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enable_linux_futex=no
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AC_LINK_IFELSE(
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[AC_LANG_PROGRAM(
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[#include <sys/syscall.h>
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int lk;],
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[syscall (SYS_gettid); syscall (SYS_futex, &lk, 0, 0, 0);])],
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[AC_LINK_IFELSE(
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[AC_LANG_PROGRAM(
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[#ifndef _GNU_SOURCE
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#define _GNU_SOURCE 1
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#endif
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#include <pthread.h>
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pthread_t th; void *status;],
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[pthread_tryjoin_np (th, &status);])],[enable_linux_futex=yes],
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[if test x$cross_compiling = xno; then
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if getconf GNU_LIBPTHREAD_VERSION 2>/dev/null \
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| LC_ALL=C grep -i NPTL > /dev/null 2>/dev/null; then
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AC_MSG_WARN([The kernel might not support futex or gettid syscalls.
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If so, please configure with --disable-linux-futex])
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fi
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fi
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enable_linux_futex=yes])])
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;;
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yes)
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AC_LINK_IFELSE(
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[AC_LANG_PROGRAM(
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[#include <sys/syscall.h>
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int lk;],
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[syscall (SYS_gettid); syscall (SYS_futex, &lk, 0, 0, 0);])],[],
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[AC_MSG_ERROR([SYS_gettid and SYS_futex required for --enable-linux-futex])])
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;;
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esac
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;;
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esac
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# At least for glibc, clock_gettime is in librt. But don't pull that
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# in if it still doesn't give us the function we want.
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if test $ac_cv_func_clock_gettime = no; then
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AC_CHECK_LIB(rt, clock_gettime,
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[LIBS="-lrt $LIBS"
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AC_DEFINE(HAVE_CLOCK_GETTIME,
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[Define to 1 if you have the `clock_gettime' function.])])
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fi
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# See if we support thread-local storage.
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GCC_CHECK_TLS
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# See what sort of export controls are availible.
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LIBGOMP_CHECK_ATTRIBUTE_VISIBILITY
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LIBGOMP_CHECK_ATTRIBUTE_DLLEXPORT
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LIBGOMP_CHECK_ATTRIBUTE_ALIAS
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LIBGOMP_ENABLE_SYMVERS
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# Get target configury.
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. ${srcdir}/configure.tgt
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CFLAGS="$save_CFLAGS $XCFLAGS"
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# Check for __sync_val_compare_and_swap, but only after the target has
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# had a chance to set XCFLAGS.
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LIBGOMP_CHECK_SYNC_BUILTINS
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XCFLAGS="$XCFLAGS$XPCFLAGS"
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AC_SUBST(config_path)
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AC_SUBST(XCFLAGS)
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AC_SUBST(XLDFLAGS)
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# Cleanup and exit.
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CFLAGS="$save_CFLAGS"
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AC_CACHE_SAVE
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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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# Set up the set of libraries that we need to link against for libgomp.
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# Note that the GOMP_SELF_SPEC in gcc.c will force -pthread for -fopenmp,
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# which will force linkage against -lpthread (or equivalent for the system).
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# That's not 100% ideal, but about the best we can do easily.
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if test $enable_shared = yes; then
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link_gomp="-lgomp %{static: $LIBS}"
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else
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link_gomp="-lgomp $LIBS"
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fi
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AC_SUBST(link_gomp)
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AM_CONDITIONAL([USE_FORTRAN], [test "$ac_cv_fc_compiler_gnu" = yes])
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# ??? 2006-01-24: Paulo committed to asking autoconf folk to document
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# and export AC_COMPUTE_INT. If that happens, then we'll need to remove
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# the underscore here and update the PREREQ. If it doesn't, then we'll
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# need to copy this macro to our acinclude.m4.
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save_CFLAGS="$CFLAGS"
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for i in $config_path; do
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if test -f $srcdir/config/$i/omp-lock.h; then
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CFLAGS="$CFLAGS -include $srcdir/config/$i/omp-lock.h"
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break
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fi
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done
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_AC_COMPUTE_INT([sizeof (omp_lock_t)], [OMP_LOCK_SIZE],,
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[AC_MSG_ERROR([unsupported system, cannot find sizeof (omp_lock_t)])])
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_AC_COMPUTE_INT([__alignof (omp_lock_t)], [OMP_LOCK_ALIGN])
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_AC_COMPUTE_INT([sizeof (omp_nest_lock_t)], [OMP_NEST_LOCK_SIZE])
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_AC_COMPUTE_INT([__alignof (omp_nest_lock_t)], [OMP_NEST_LOCK_ALIGN])
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# If the lock fits in an integer, then arrange for Fortran to use that
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# integer. If it doesn't, then arrange for Fortran to use a pointer.
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# Except that we don't have a way at present to multi-lib the installed
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# Fortran modules, so we assume 8 bytes for pointers, regardless of the
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# actual target.
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OMP_LOCK_KIND=$OMP_LOCK_SIZE
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OMP_NEST_LOCK_KIND=$OMP_NEST_LOCK_SIZE
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if test $OMP_LOCK_SIZE -gt 8 || test $OMP_LOCK_ALIGN -gt $OMP_LOCK_SIZE; then
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OMP_LOCK_KIND=8
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fi
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if test $OMP_NEST_LOCK_SIZE -gt 8 || test $OMP_NEST_LOCK_ALIGN -gt $OMP_NEST_LOCK_SIZE; then
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OMP_NEST_LOCK_KIND=8
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fi
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AC_SUBST(OMP_LOCK_SIZE)
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AC_SUBST(OMP_LOCK_ALIGN)
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AC_SUBST(OMP_NEST_LOCK_SIZE)
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AC_SUBST(OMP_NEST_LOCK_ALIGN)
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AC_SUBST(OMP_LOCK_KIND)
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AC_SUBST(OMP_NEST_LOCK_KIND)
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CFLAGS="$save_CFLAGS"
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AC_CONFIG_FILES(omp.h omp_lib.h omp_lib.f90 libgomp_f.h)
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AC_CONFIG_FILES(Makefile testsuite/Makefile libgomp.spec)
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AC_OUTPUT
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