1 # Process this file with autoconf to produce a configure script, like so:
2 # aclocal -I ../config && autoconf && autoheader && automake
5 AC_INIT([GNU OpenMP Runtime Library], 1.0,,[libgomp])
6 AC_CONFIG_HEADER(config.h)
12 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
13 LIBGOMP_ENABLE(version-specific-runtime-libs, no, ,
14 [Specify that runtime libraries should be installed in a compiler-specific directory],
16 AC_MSG_RESULT($enable_version_specific_runtime_libs)
18 AC_MSG_CHECKING([for --enable-linux-futex])
19 LIBGOMP_ENABLE(linux-futex, default, ,
20 [Use the Linux futex system call],
21 permit yes|no|default)
22 AC_MSG_RESULT($enable_linux_futex)
24 # We would like our source tree to be readonly. However when releases or
25 # pre-releases are generated, the flex/bison generated files as well as the
26 # various formats of manuals need to be included along with the rest of the
27 # sources. Therefore we have --enable-generated-files-in-srcdir to do
29 AC_MSG_CHECKING([for --enable-generated-files-in-srcdir])
30 LIBGOMP_ENABLE(generated-files-in-srcdir, no, ,
31 [put copies of generated files in source dir intended for creating source
32 tarballs for users without texinfo bison or flex.],
34 AC_MSG_RESULT($enable_generated_files_in_srcdir)
35 AM_CONDITIONAL(GENINSRC, test "$enable_generated_files_in_srcdir" = yes)
41 # Gets build, host, target, *_vendor, *_cpu, *_os, etc.
43 # You will slowly go insane if you do not grok the following fact: when
44 # building this library, the top-level /target/ becomes the library's /host/.
46 # configure then causes --target to default to --host, exactly like any
47 # other package using autoconf. Therefore, 'target' and 'host' will
48 # always be the same. This makes sense both for native and cross compilers
49 # just think about it for a little while. :-)
51 # Also, if this library is being configured as part of a cross compiler, the
52 # top-level configure script will pass the "real" host as $with_cross_host.
54 # Do not delete or change the following two lines. For why, see
55 # http://gcc.gnu.org/ml/libstdc++/2003-07/msg00451.html
57 target_alias=${target_alias-$host_alias}
59 # Sets up automake. Must come after AC_CANONICAL_SYSTEM. Each of the
60 # following is magically included in AUTOMAKE_OPTIONS in each Makefile.am.
61 # 1.9.0: minimum required version
62 # no-define: PACKAGE and VERSION will not be #define'd in config.h (a bunch
63 # of other PACKAGE_* variables will, however, and there's nothing
64 # we can do about that; they come from AC_INIT).
65 # foreign: we don't follow the normal rules for GNU packages (no COPYING
66 # file in the top srcdir, etc, etc), so stop complaining.
67 # -Wall: turns on all automake warnings...
68 # -Wno-portability: ...except this one, since GNU make is required.
69 # -Wno-override: ... and this one, since we do want this in testsuite.
70 AM_INIT_AUTOMAKE([1.9.0 foreign -Wall -Wno-portability -Wno-override])
71 AM_ENABLE_MULTILIB(, ..)
73 # Calculate toolexeclibdir
74 # Also toolexecdir, though it's only used in toolexeclibdir
75 case ${enable_version_specific_runtime_libs} in
77 # Need the gcc compiler version to know where to install libraries
78 # and header files if --enable-version-specific-runtime-libs option
80 toolexecdir='$(libdir)/gcc/$(target_alias)'
81 toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)'
84 if test -n "$with_cross_host" &&
85 test x"$with_cross_host" != x"no"; then
86 # Install a library built with a cross compiler in tooldir, not libdir.
87 toolexecdir='$(exec_prefix)/$(target_alias)'
88 toolexeclibdir='$(toolexecdir)/lib'
90 toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
91 toolexeclibdir='$(libdir)'
93 multi_os_directory=`$CC -print-multi-os-directory`
94 case $multi_os_directory in
95 .) ;; # Avoid trailing /.
96 *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
100 AC_SUBST(toolexecdir)
101 AC_SUBST(toolexeclibdir)
103 # Check the compiler.
104 # The same as in boehm-gc and libstdc++. Have to borrow it from there.
105 # We must force CC to /not/ be precious variables; otherwise
106 # the wrong, non-multilib-adjusted value will be used in multilibs.
107 # As a side effect, we have to subst CFLAGS ourselves.
109 m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
110 m4_define([_AC_ARG_VAR_PRECIOUS],[])
112 m4_rename([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
116 # In order to override CFLAGS_FOR_TARGET, all of our special flags go
117 # in XCFLAGS. But we need them in CFLAGS during configury. So put them
118 # in both places for now and restore CFLAGS at the end of config.
119 save_CFLAGS="$CFLAGS"
121 # Add -Wall -Werror if we are using GCC.
122 if test "x$GCC" = "xyes"; then
123 XCFLAGS="$XCFLAGS -Wall -Werror"
126 # Find other programs we need.
127 AC_CHECK_TOOL(AR, ar)
128 AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error)
129 AC_PATH_PROG(PERL, perl, perl-not-found-in-path-error)
135 AC_SUBST(enable_shared)
136 AC_SUBST(enable_static)
140 # We need gfortran to compile parts of the library
141 # We can't use AC_PROG_FC because it expects a fully working gfortran.
142 #AC_PROG_FC(gfortran)
145 FCFLAGS="$FCFLAGS -Wall"
147 # For libtool versioning info, format is CURRENT:REVISION:AGE
148 libtool_VERSION=1:0:0
149 AC_SUBST(libtool_VERSION)
151 # Check header files.
154 AC_CHECK_HEADERS(unistd.h semaphore.h sys/loadavg.h sys/time.h)
156 GCC_HEADER_STDINT(gstdint.h)
158 # Check to see if -pthread or -lpthread is needed. Prefer the former.
159 # In case the pthread.h system header is not found, this test will fail.
162 # Darwin doesn't need the -pthread option since threads are in libSystem
165 [#include <pthread.h>
166 void *g(void *d) { return NULL; }],
167 [pthread_t t; pthread_create(&t,NULL,g,NULL);])],
172 XPCFLAGS=" -Wc,-pthread"
175 [CFLAGS="$save_CFLAGS" LIBS="-lpthread $LIBS"
178 [#include <pthread.h>
179 void *g(void *d) { return NULL; }],
180 [pthread_t t; pthread_create(&t,NULL,g,NULL);])],
182 [AC_MSG_ERROR([Pthreads are required to build libgomp])])])
184 # Check for functions needed.
185 AC_CHECK_FUNCS(getloadavg clock_gettime)
187 # Check for broken semaphore implementation on darwin.
188 # sem_init returns: sem_init error: Function not implemented.
191 AC_DEFINE(HAVE_BROKEN_POSIX_SEMAPHORES, 1,
192 Define if the POSIX Semaphores do not work on your system.)
195 case "$enable_linux_futex" in
197 # If headers don't have gettid/futex syscalls definition, then
198 # default to no, otherwise there will be compile time failures.
199 # Otherwise, default to yes. If we don't detect we are
200 # compiled/linked against NPTL and not cross-compiling, check
201 # if programs are run by default against NPTL and if not, issue
203 enable_linux_futex=no
206 [#include <sys/syscall.h>
208 [syscall (SYS_gettid); syscall (SYS_futex, &lk, 0, 0, 0);])],
212 #define _GNU_SOURCE 1
215 pthread_t th; void *status;],
216 [pthread_tryjoin_np (th, &status);])],[enable_linux_futex=yes],
217 [if test x$cross_compiling = xno; then
218 if getconf GNU_LIBPTHREAD_VERSION 2>/dev/null \
219 | LC_ALL=C grep -i NPTL > /dev/null 2>/dev/null; then
220 AC_MSG_WARN([The kernel might not support futex or gettid syscalls.
221 If so, please configure with --disable-linux-futex])
224 enable_linux_futex=yes])])
229 [#include <sys/syscall.h>
231 [syscall (SYS_gettid); syscall (SYS_futex, &lk, 0, 0, 0);])],[],
232 [AC_MSG_ERROR([SYS_gettid and SYS_futex required for --enable-linux-futex])])
238 # At least for glibc, clock_gettime is in librt. But don't pull that
239 # in if it still doesn't give us the function we want.
240 if test $ac_cv_func_clock_gettime = no; then
241 AC_CHECK_LIB(rt, clock_gettime,
243 AC_DEFINE(HAVE_CLOCK_GETTIME, 1,
244 [Define to 1 if you have the `clock_gettime' function.])])
247 # See if we support thread-local storage.
250 # See what sort of export controls are availible.
251 LIBGOMP_CHECK_ATTRIBUTE_VISIBILITY
252 LIBGOMP_CHECK_ATTRIBUTE_DLLEXPORT
253 LIBGOMP_CHECK_ATTRIBUTE_ALIAS
254 LIBGOMP_ENABLE_SYMVERS
256 # Get target configury.
257 . ${srcdir}/configure.tgt
258 CFLAGS="$save_CFLAGS $XCFLAGS"
260 # Check for __sync_val_compare_and_swap, but only after the target has
261 # had a chance to set XCFLAGS.
262 LIBGOMP_CHECK_SYNC_BUILTINS
264 XCFLAGS="$XCFLAGS$XPCFLAGS"
266 AC_SUBST(config_path)
271 CFLAGS="$save_CFLAGS"
274 if test ${multilib} = yes; then
275 multilib_arg="--enable-multilib"
280 # Set up the set of libraries that we need to link against for libgomp.
281 # Note that the GOMP_SELF_SPEC in gcc.c will force -pthread for -fopenmp,
282 # which will force linkage against -lpthread (or equivalent for the system).
283 # That's not 100% ideal, but about the best we can do easily.
284 if test $enable_shared = yes; then
285 link_gomp="-lgomp %{static: $LIBS}"
287 link_gomp="-lgomp $LIBS"
291 AM_CONDITIONAL([USE_FORTRAN], [test "$ac_cv_fc_compiler_gnu" = yes])
293 # ??? 2006-01-24: Paulo committed to asking autoconf folk to document
294 # and export AC_COMPUTE_INT. If that happens, then we'll need to remove
295 # the underscore here and update the PREREQ. If it doesn't, then we'll
296 # need to copy this macro to our acinclude.m4.
297 save_CFLAGS="$CFLAGS"
298 for i in $config_path; do
299 if test -f $srcdir/config/$i/omp-lock.h; then
300 CFLAGS="$CFLAGS -include $srcdir/config/$i/omp-lock.h"
305 _AC_COMPUTE_INT([sizeof (omp_lock_t)], [OMP_LOCK_SIZE],,
306 [AC_MSG_ERROR([unsupported system, cannot find sizeof (omp_lock_t)])])
307 _AC_COMPUTE_INT([__alignof (omp_lock_t)], [OMP_LOCK_ALIGN])
308 _AC_COMPUTE_INT([sizeof (omp_nest_lock_t)], [OMP_NEST_LOCK_SIZE])
309 _AC_COMPUTE_INT([__alignof (omp_nest_lock_t)], [OMP_NEST_LOCK_ALIGN])
311 # If the lock fits in an integer, then arrange for Fortran to use that
312 # integer. If it doesn't, then arrange for Fortran to use a pointer.
313 # Except that we don't have a way at present to multi-lib the installed
314 # Fortran modules, so we assume 8 bytes for pointers, regardless of the
316 OMP_LOCK_KIND=$OMP_LOCK_SIZE
317 OMP_NEST_LOCK_KIND=$OMP_NEST_LOCK_SIZE
318 if test $OMP_LOCK_SIZE -gt 8 || test $OMP_LOCK_ALIGN -gt $OMP_LOCK_SIZE; then
321 if test $OMP_NEST_LOCK_SIZE -gt 8 || test $OMP_NEST_LOCK_ALIGN -gt $OMP_NEST_LOCK_SIZE; then
325 AC_SUBST(OMP_LOCK_SIZE)
326 AC_SUBST(OMP_LOCK_ALIGN)
327 AC_SUBST(OMP_NEST_LOCK_SIZE)
328 AC_SUBST(OMP_NEST_LOCK_ALIGN)
329 AC_SUBST(OMP_LOCK_KIND)
330 AC_SUBST(OMP_NEST_LOCK_KIND)
331 CFLAGS="$save_CFLAGS"
333 AC_CONFIG_FILES(omp.h omp_lib.h omp_lib.f90 libgomp_f.h)
334 AC_CONFIG_FILES(Makefile testsuite/Makefile libgomp.spec)