1 # Process this file with autoconf to produce a configure script, like so:
2 # aclocal -I ../config && autoconf && autoheader && automake
4 AC_INIT([GNU Offloading and Multi Processing Runtime Library], 1.0,,[libgomp])
5 AC_CONFIG_HEADER(config.h)
11 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
12 LIBGOMP_ENABLE(version-specific-runtime-libs, no, ,
13 [Specify that runtime libraries should be installed in a compiler-specific directory],
15 AC_MSG_RESULT($enable_version_specific_runtime_libs)
17 # We would like our source tree to be readonly. However when releases or
18 # pre-releases are generated, the flex/bison generated files as well as the
19 # various formats of manuals need to be included along with the rest of the
20 # sources. Therefore we have --enable-generated-files-in-srcdir to do
22 AC_MSG_CHECKING([for --enable-generated-files-in-srcdir])
23 LIBGOMP_ENABLE(generated-files-in-srcdir, no, ,
24 [put copies of generated files in source dir intended for creating source
25 tarballs for users without texinfo bison or flex.],
27 AC_MSG_RESULT($enable_generated_files_in_srcdir)
28 AM_CONDITIONAL(GENINSRC, test "$enable_generated_files_in_srcdir" = yes)
34 # Gets build, host, target, *_vendor, *_cpu, *_os, etc.
36 # You will slowly go insane if you do not grok the following fact: when
37 # building this library, the top-level /target/ becomes the library's /host/.
39 # configure then causes --target to default to --host, exactly like any
40 # other package using autoconf. Therefore, 'target' and 'host' will
41 # always be the same. This makes sense both for native and cross compilers
42 # just think about it for a little while. :-)
44 # Also, if this library is being configured as part of a cross compiler, the
45 # top-level configure script will pass the "real" host as $with_cross_host.
47 # Do not delete or change the following two lines. For why, see
48 # http://gcc.gnu.org/ml/libstdc++/2003-07/msg00451.html
50 target_alias=${target_alias-$host_alias}
52 # Sets up automake. Must come after AC_CANONICAL_SYSTEM. Each of the
53 # following is magically included in AUTOMAKE_OPTIONS in each Makefile.am.
54 # 1.9.0: minimum required version
55 # no-define: PACKAGE and VERSION will not be #define'd in config.h (a bunch
56 # of other PACKAGE_* variables will, however, and there's nothing
57 # we can do about that; they come from AC_INIT).
58 # foreign: we don't follow the normal rules for GNU packages (no COPYING
59 # file in the top srcdir, etc, etc), so stop complaining.
60 # no-dist: we don't want 'dist' and related rules.
61 # -Wall: turns on all automake warnings...
62 # -Wno-portability: ...except this one, since GNU make is required.
63 # -Wno-override: ... and this one, since we do want this in testsuite.
64 AM_INIT_AUTOMAKE([1.9.0 foreign no-dist -Wall -Wno-portability -Wno-override])
65 AM_ENABLE_MULTILIB(, ..)
67 # Calculate toolexeclibdir
68 # Also toolexecdir, though it's only used in toolexeclibdir
69 case ${enable_version_specific_runtime_libs} in
71 # Need the gcc compiler version to know where to install libraries
72 # and header files if --enable-version-specific-runtime-libs option
74 toolexecdir='$(libdir)/gcc/$(target_alias)'
75 toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)'
78 if test -n "$with_cross_host" &&
79 test x"$with_cross_host" != x"no"; then
80 # Install a library built with a cross compiler in tooldir, not libdir.
81 toolexecdir='$(exec_prefix)/$(target_alias)'
82 toolexeclibdir='$(toolexecdir)/lib'
84 toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
85 toolexeclibdir='$(libdir)'
87 multi_os_directory=`$CC -print-multi-os-directory`
88 case $multi_os_directory in
89 .) ;; # Avoid trailing /.
90 *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
95 AC_SUBST(toolexeclibdir)
98 # The same as in boehm-gc and libstdc++. Have to borrow it from there.
99 # We must force CC to /not/ be precious variables; otherwise
100 # the wrong, non-multilib-adjusted value will be used in multilibs.
101 # As a side effect, we have to subst CFLAGS ourselves.
103 m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
104 m4_define([_AC_ARG_VAR_PRECIOUS],[])
106 m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
110 # In order to override CFLAGS_FOR_TARGET, all of our special flags go
111 # in XCFLAGS. But we need them in CFLAGS during configury. So put them
112 # in both places for now and restore CFLAGS at the end of config.
113 save_CFLAGS="$CFLAGS"
115 # Add -Wall -Werror if we are using GCC.
116 if test "x$GCC" = "xyes"; then
117 XCFLAGS="$XCFLAGS -Wall -Werror"
120 # Find other programs we need.
121 AC_CHECK_TOOL(AR, ar)
122 AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error)
123 AC_PATH_PROG(PERL, perl, perl-not-found-in-path-error)
127 # See if makeinfo has been installed and is modern enough
128 # that we can use it.
129 ACX_CHECK_PROG_VER([MAKEINFO], [makeinfo], [--version],
130 [GNU texinfo.* \([0-9][0-9.]*\)],
131 [4.[4-9]*|4.[1-9][0-9]*|[5-9]*|[1-9][0-9]*])
132 AM_CONDITIONAL(BUILD_INFO, test $gcc_cv_prog_makeinfo_modern = "yes")
138 AC_SUBST(enable_shared)
139 AC_SUBST(enable_static)
143 # Create a spec file, so that compile/link tests don't fail
144 test -f libgfortran.spec || touch libgfortran.spec
145 FCFLAGS="$FCFLAGS -L."
147 # We need gfortran to compile parts of the library
148 # We can't use AC_PROG_FC because it expects a fully working gfortran.
149 #AC_PROG_FC(gfortran)
150 case `echo $GFORTRAN` in
154 set dummy $GFORTRAN; ac_word=$2
155 if test -x "$ac_word"; then
162 FCFLAGS="$FCFLAGS -Wall -L../libgfortran"
164 # For libtool versioning info, format is CURRENT:REVISION:AGE
165 libtool_VERSION=1:0:0
166 AC_SUBST(libtool_VERSION)
168 # Check header files.
172 AC_CHECK_HEADERS(pthread.h unistd.h semaphore.h sys/loadavg.h sys/sysctl.h sys/time.h)
174 GCC_HEADER_STDINT(gstdint.h)
179 # RTEMS supports Pthreads, but the library is not available at GCC build time.
182 # NVPTX does not support Pthreads, has its own code replacement.
183 libgomp_use_pthreads=no
184 # NVPTX is an accelerator-only target
185 libgomp_offloaded_only=yes
188 # Check to see if -pthread or -lpthread is needed. Prefer the former.
189 # In case the pthread.h system header is not found, this test will fail.
190 CFLAGS="$CFLAGS -pthread"
193 [#include <pthread.h>
194 void *g(void *d) { return NULL; }],
195 [pthread_t t; pthread_create(&t,NULL,g,NULL);])],
196 [XPCFLAGS=" -Wc,-pthread"],
197 [CFLAGS="$save_CFLAGS" LIBS="-lpthread $LIBS"
200 [#include <pthread.h>
201 void *g(void *d) { return NULL; }],
202 [pthread_t t; pthread_create(&t,NULL,g,NULL);])],
204 [AC_MSG_ERROR([Pthreads are required to build libgomp])])])
207 if test x$libgomp_use_pthreads != xno; then
208 AC_DEFINE(LIBGOMP_USE_PTHREADS, 1,
209 [Define to 1 if libgomp should use POSIX threads.])
212 if test x$libgomp_offloaded_only = xyes; then
213 AC_DEFINE(LIBGOMP_OFFLOADED_ONLY, 1,
214 [Define to 1 if building libgomp for an accelerator-only target.])
217 m4_include([plugin/configfrag.ac])
219 # Check for functions needed.
220 AC_CHECK_FUNCS(getloadavg clock_gettime strtoull)
221 AC_CHECK_FUNCS(aligned_alloc posix_memalign memalign _aligned_malloc)
223 # Check for broken semaphore implementation on darwin.
224 # sem_init returns: sem_init error: Function not implemented.
227 AC_DEFINE(HAVE_BROKEN_POSIX_SEMAPHORES, 1,
228 Define if the POSIX Semaphores do not work on your system.)
232 # RTEMS specific checks
235 AC_CHECK_TYPES([struct _Mutex_Control],[],[],[#include <sys/lock.h>])
241 # Check for pthread_{,attr_}[sg]etaffinity_np.
245 #include <pthread.h>],
248 pthread_getaffinity_np (pthread_self (), sizeof (cpu_set_t), &cpuset);
249 if (CPU_ISSET (0, &cpuset))
250 CPU_SET (1, &cpuset);
253 pthread_setaffinity_np (pthread_self (), sizeof (cpu_set_t), &cpuset);
254 pthread_attr_init (&attr);
255 pthread_attr_getaffinity_np (&attr, sizeof (cpu_set_t), &cpuset);
256 pthread_attr_setaffinity_np (&attr, sizeof (cpu_set_t), &cpuset);])],
257 AC_DEFINE(HAVE_PTHREAD_AFFINITY_NP, 1,
258 [ Define if pthread_{,attr_}{g,s}etaffinity_np is supported.]))
260 # At least for glibc, clock_gettime is in librt. But don't pull that
261 # in if it still doesn't give us the function we want.
262 if test $ac_cv_func_clock_gettime = no; then
263 AC_CHECK_LIB(rt, clock_gettime,
265 AC_DEFINE(HAVE_CLOCK_GETTIME, 1,
266 [Define to 1 if you have the `clock_gettime' function.])])
274 #include <sys/utsname.h>],
276 volatile size_t len = 0;
278 len = strlen (buf.nodename);])],
279 AC_DEFINE(HAVE_UNAME, 1,
280 [ Define if uname is supported and struct utsname has nodename field.]))
282 # Check for gethostname.
285 [#include <unistd.h>],
289 if (gethostname (buf, sizeof (buf) - 1) == 0)
293 AC_DEFINE(HAVE_GETHOSTNAME, 1,
294 [ Define if gethostname is supported.]))
299 [#include <unistd.h>],
300 [int pid = getpid ();])],
301 AC_DEFINE(HAVE_GETPID, 1,
302 [ Define if getpid is supported.]))
304 # See if we support thread-local storage.
307 # See if we have emulated thread-local storage.
310 # See what sort of export controls are available.
311 LIBGOMP_CHECK_ATTRIBUTE_VISIBILITY
312 LIBGOMP_CHECK_ATTRIBUTE_DLLEXPORT
313 LIBGOMP_CHECK_ATTRIBUTE_ALIAS
314 LIBGOMP_ENABLE_SYMVERS
316 if test $enable_symvers = gnu; then
317 AC_DEFINE(LIBGOMP_GNU_SYMBOL_VERSIONING, 1,
318 [Define to 1 if GNU symbol versioning is used for libgomp.])
321 # Determine cpu count to limit testsuite parallelism.
325 # Get target configury.
326 . ${srcdir}/configure.tgt
327 CFLAGS="$save_CFLAGS $XCFLAGS"
329 # Check for __sync_val_compare_and_swap, but only after the target has
330 # had a chance to set XCFLAGS.
331 LIBGOMP_CHECK_SYNC_BUILTINS
333 XCFLAGS="$XCFLAGS$XPCFLAGS"
335 # Add CET specific flags if CET is enabled
336 GCC_CET_FLAGS(CET_FLAGS)
337 XCFLAGS="$XCFLAGS $CET_FLAGS"
338 FCFLAGS="$FCFLAGS $CET_FLAGS"
340 AC_SUBST(config_path)
345 CFLAGS="$save_CFLAGS"
348 if test ${multilib} = yes; then
349 multilib_arg="--enable-multilib"
354 # Set up the set of libraries that we need to link against for libgomp.
355 # Note that the GOMP_SELF_SPEC in gcc.c may force -pthread,
356 # which will force linkage against -lpthread (or equivalent for the system).
357 # That's not 100% ideal, but about the best we can do easily.
358 if test $enable_shared = yes; then
359 link_gomp="-lgomp %{static: $LIBS}"
361 link_gomp="-lgomp $LIBS"
365 AM_CONDITIONAL([USE_FORTRAN], [test "$ac_cv_fc_compiler_gnu" = yes])
367 # ??? 2006-01-24: Paulo committed to asking autoconf folk to document
368 # and export AC_COMPUTE_INT. If that happens, then we'll need to remove
369 # the underscore here and update the PREREQ. If it doesn't, then we'll
370 # need to copy this macro to our acinclude.m4.
371 save_CFLAGS="$CFLAGS"
372 for i in $config_path; do
373 if test -f $srcdir/config/$i/omp-lock.h; then
374 CFLAGS="$CFLAGS -include confdefs.h -include $srcdir/config/$i/omp-lock.h"
379 _AC_COMPUTE_INT([sizeof (omp_lock_t)], [OMP_LOCK_SIZE],,
380 [AC_MSG_ERROR([unsupported system, cannot find sizeof (omp_lock_t)])])
381 _AC_COMPUTE_INT([__alignof (omp_lock_t)], [OMP_LOCK_ALIGN])
382 _AC_COMPUTE_INT([sizeof (omp_nest_lock_t)], [OMP_NEST_LOCK_SIZE])
383 _AC_COMPUTE_INT([__alignof (omp_nest_lock_t)], [OMP_NEST_LOCK_ALIGN])
384 _AC_COMPUTE_INT([sizeof (omp_lock_25_t)], [OMP_LOCK_25_SIZE],,
385 [AC_MSG_ERROR([unsupported system, cannot find sizeof (omp_lock_25_t)])])
386 _AC_COMPUTE_INT([__alignof (omp_lock_25_t)], [OMP_LOCK_25_ALIGN])
387 _AC_COMPUTE_INT([sizeof (omp_nest_lock_25_t)], [OMP_NEST_LOCK_25_SIZE])
388 _AC_COMPUTE_INT([__alignof (omp_nest_lock_25_t)], [OMP_NEST_LOCK_25_ALIGN])
390 # If the lock fits in an integer, then arrange for Fortran to use that
391 # integer. If it doesn't, then arrange for Fortran to use a pointer.
392 # Except that we don't have a way at present to multi-lib the installed
393 # Fortran modules, so we assume 8 bytes for pointers, regardless of the
395 OMP_LOCK_KIND=$OMP_LOCK_SIZE
396 OMP_NEST_LOCK_KIND=$OMP_NEST_LOCK_SIZE
397 if test $OMP_LOCK_SIZE -gt 8 || test $OMP_LOCK_ALIGN -gt $OMP_LOCK_SIZE; then
400 if test $OMP_NEST_LOCK_SIZE -gt 8 || test $OMP_NEST_LOCK_ALIGN -gt $OMP_NEST_LOCK_SIZE; then
403 OMP_LOCK_25_KIND=$OMP_LOCK_25_SIZE
404 OMP_NEST_LOCK_25_KIND=$OMP_NEST_LOCK_25_SIZE
405 if test $OMP_LOCK_25_SIZE -gt 8 || test $OMP_LOCK_25_ALIGN -gt $OMP_LOCK_25_SIZE; then
408 if test $OMP_NEST_LOCK_25_SIZE -gt 8 || test $OMP_NEST_LOCK_25_ALIGN -gt $OMP_NEST_LOCK_25_SIZE; then
409 OMP_NEST_LOCK_25_KIND=8
412 AC_SUBST(OMP_LOCK_SIZE)
413 AC_SUBST(OMP_LOCK_ALIGN)
414 AC_SUBST(OMP_NEST_LOCK_SIZE)
415 AC_SUBST(OMP_NEST_LOCK_ALIGN)
416 AC_SUBST(OMP_LOCK_KIND)
417 AC_SUBST(OMP_NEST_LOCK_KIND)
418 AC_SUBST(OMP_LOCK_25_SIZE)
419 AC_SUBST(OMP_LOCK_25_ALIGN)
420 AC_SUBST(OMP_NEST_LOCK_25_SIZE)
421 AC_SUBST(OMP_NEST_LOCK_25_ALIGN)
422 AC_SUBST(OMP_LOCK_25_KIND)
423 AC_SUBST(OMP_NEST_LOCK_25_KIND)
424 CFLAGS="$save_CFLAGS"
426 # Determine what GCC version number to use in filesystem paths.
429 AC_CONFIG_FILES(omp.h omp_lib.h omp_lib.f90 libgomp_f.h)
430 AC_CONFIG_FILES(Makefile testsuite/Makefile libgomp.spec)
431 AC_CONFIG_FILES([testsuite/libgomp-test-support.pt.exp:testsuite/libgomp-test-support.exp.in])