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Diffstat (limited to 'libgomp/configure.ac')
| -rw-r--r-- | libgomp/configure.ac | 220 |
1 files changed, 220 insertions, 0 deletions
diff --git a/libgomp/configure.ac b/libgomp/configure.ac new file mode 100644 index 00000000000..854514a27f4 --- /dev/null +++ b/libgomp/configure.ac @@ -0,0 +1,220 @@ +# Process this file with autoconf to produce a configure script, like so: +# aclocal -I ../config && autoconf && autoheader && automake + +AC_PREREQ(2.59) +AC_INIT([GNU OpenMP Runtime Library], 1.0,,[libgomp]) +AC_CONFIG_HEADER(config.h) + +# ------- +# Options +# ------- + +AC_MSG_CHECKING([for --enable-version-specific-runtime-libs]) +LIBGOMP_ENABLE(version-specific-runtime-libs, no, , + [Specify that runtime libraries should be installed in a compiler-specific directory], + permit yes|no) +AC_MSG_RESULT($enable_version_specific_runtime_libs) + +AC_MSG_CHECKING([for --enable-linux-futex]) +LIBGOMP_ENABLE(linux-futex, yes, + [Use the Linux futex system call], + permit yes|no) +AC_MSG_RESULT($enable_linux_futex) + +# ------- +# ------- + +# Gets build, host, target, *_vendor, *_cpu, *_os, etc. +# +# You will slowly go insane if you do not grok the following fact: when +# building this library, the top-level /target/ becomes the library's /host/. +# +# configure then causes --target to default to --host, exactly like any +# other package using autoconf. Therefore, 'target' and 'host' will +# always be the same. This makes sense both for native and cross compilers +# just think about it for a little while. :-) +# +# Also, if this library is being configured as part of a cross compiler, the +# top-level configure script will pass the "real" host as $with_cross_host. +# +# Do not delete or change the following two lines. For why, see +# http://gcc.gnu.org/ml/libstdc++/2003-07/msg00451.html +AC_CANONICAL_SYSTEM +target_alias=${target_alias-$host_alias} + +# Sets up automake. Must come after AC_CANONICAL_SYSTEM. Each of the +# following is magically included in AUTOMAKE_OPTIONS in each Makefile.am. +# 1.9.0: minimum required version +# no-define: PACKAGE and VERSION will not be #define'd in config.h (a bunch +# of other PACKAGE_* variables will, however, and there's nothing +# we can do about that; they come from AC_INIT). +# foreign: we don't follow the normal rules for GNU packages (no COPYING +# file in the top srcdir, etc, etc), so stop complaining. +# no-dependencies: turns off auto dependency generation (just for now) +# -Wall: turns on all automake warnings... +# -Wno-portability: ...except this one, since GNU make is required. +# -Wno-override: ... and this one, since we do want this in testsuite. +AM_INIT_AUTOMAKE([1.9.0 foreign -Wall -Wno-portability -Wno-override]) +AM_ENABLE_MULTILIB(, ..) + +# Calculate toolexeclibdir +# Also toolexecdir, though it's only used in toolexeclibdir +case ${enable_version_specific_runtime_libs} in + yes) + # Need the gcc compiler version to know where to install libraries + # and header files if --enable-version-specific-runtime-libs option + # is selected. + toolexecdir='$(libdir)/gcc/$(target_alias)' + toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)' + ;; + no) + if test -n "$with_cross_host" && + test x"$with_cross_host" != x"no"; then + # Install a library built with a cross compiler in tooldir, not libdir. + toolexecdir='$(exec_prefix)/$(target_alias)' + toolexeclibdir='$(toolexecdir)/lib' + else + toolexecdir='$(libdir)/gcc-lib/$(target_alias)' + toolexeclibdir='$(libdir)' + fi + multi_os_directory=`$CC -print-multi-os-directory` + case $multi_os_directory in + .) ;; # Avoid trailing /. + *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;; + esac + ;; +esac +AC_SUBST(toolexecdir) +AC_SUBST(toolexeclibdir) + +# Check the compiler. +# The same as in boehm-gc and libstdc++. Have to borrow it from there. +# We must force CC to /not/ be precious variables; otherwise +# the wrong, non-multilib-adjusted value will be used in multilibs. +# As a side effect, we have to subst CFLAGS ourselves. + +m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS]) +m4_define([_AC_ARG_VAR_PRECIOUS],[]) +AC_PROG_CC +m4_rename([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS]) + +AC_SUBST(CFLAGS) + +# In order to override CFLAGS_FOR_TARGET, all of our special flags go +# in XCFLAGS. But we need them in CFLAGS during configury. So put them +# in both places for now and restore CFLAGS at the end of config. +save_CFLAGS="$CFLAGS" + +# Add -Wall -Werror if we are using GCC. +if test "x$GCC" = "xyes"; then + XCFLAGS="$XCFLAGS -Wall -Werror" +fi + +# Find other programs we need. +AC_CHECK_TOOL(AR, ar) +AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error) +AC_PATH_PROG(PERL, perl, perl-not-found-in-path-error) +AC_PROG_MAKE_SET +AC_PROG_INSTALL + +# Configure libtool +AM_PROG_LIBTOOL +AC_SUBST(enable_shared) +AC_SUBST(enable_static) + +# We need gfortran to compile parts of the library +# We can't use AC_PROG_FC because it expects a fully working gfortran. +#AC_PROG_FC(gfortran) +FC="$GFORTRAN" +AC_PROG_FC(gfortran) +FCFLAGS="$FCFLAGS -Wall" + +# For libtool versioning info, format is CURRENT:REVISION:AGE +libtool_VERSION=1:0:0 +AC_SUBST(libtool_VERSION) + +# Check header files. +AC_STDC_HEADERS +AC_HEADER_TIME +AC_CHECK_HEADERS(unistd.h semaphore.h sys/time.h) +AC_CHECK_HEADER([pthread.h],[], + [AC_MSG_ERROR([Pthreads are required to build libgomp])]) + +# Check to see if -pthread or -lpthread is needed. Prefer the former. +XPCFLAGS="" +CFLAGS="$CFLAGS -pthread" +AC_LINK_IFELSE( + [AC_LANG_PROGRAM( + [#include <pthread.h> + void *g(void *d) { return NULL; }], + [pthread_t t; pthread_create(&t,NULL,g,NULL);])], + [XPCFLAGS=" -Wc,-pthread"], + [CFLAGS="$save_CFLAGS" LIBS="-lpthread $LIBS" + AC_LINK_IFELSE( + [AC_LANG_PROGRAM( + [#include <pthread.h> + void *g(void *d) { return NULL; }], + [pthread_t t; pthread_create(&t,NULL,g,NULL);])], + [], + [AC_MSG_ERROR([Pthreads are required to build libgomp])])]) + +# Check for functions needed. +AC_CHECK_FUNCS(getloadavg clock_gettime) + +# 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. +if test $ac_cv_func_clock_gettime = no; then + AC_CHECK_LIB(rt, clock_gettime, + [LIBS="-lrt $LIBS" + AC_DEFINE(HAVE_CLOCK_GETTIME, + [Define to 1 if you have the `clock_gettime' function.])]) +fi + +# See if we support thread-local storage. +LIBGOMP_CHECK_TLS + +# See what sort of export controls are availible. +LIBGOMP_CHECK_ATTRIBUTE_VISIBILITY +LIBGOMP_CHECK_ATTRIBUTE_DLLEXPORT +LIBGOMP_CHECK_ATTRIBUTE_ALIAS +LIBGOMP_ENABLE_SYMVERS + +# Get target configury. +. ${srcdir}/configure.tgt +CFLAGS="$save_CFLAGS $XCFLAGS" + +# Check for __sync_val_compare_and_swap, but only after the target has +# had a chance to set XCFLAGS. +LIBGOMP_CHECK_SYNC_BUILTINS + +XCFLAGS="$XCFLAGS$XPCFLAGS" + +AC_SUBST(config_path) +AC_SUBST(XCFLAGS) +AC_SUBST(XLDFLAGS) + +# Cleanup and exit. +CFLAGS="$save_CFLAGS" +AC_CACHE_SAVE + +if test ${multilib} = yes; then + multilib_arg="--enable-multilib" +else + multilib_arg= +fi + +# Set up the set of libraries that we need to link against for libgomp. +# Note that the GOMP_DRIVER_SPEC in gcc.c will force -pthread for -fopenmp, +# which will force linkage against -lpthread (or equivalent for the system). +# That's not 100% ideal, but about the best we can do easily. +if test $enable_shared = yes; then + link_gomp="-lgomp %{static: $LIBS}" +else + link_gomp="-lgomp $LIBS" +fi +AC_SUBST(link_gomp) + +AM_CONDITIONAL([USE_FORTRAN], [test "$ac_cv_fc_compiler_gnu" = yes]) + +AC_CONFIG_FILES(Makefile testsuite/Makefile libgomp.spec) +AC_OUTPUT |