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($enable_version_specific_runtime_libs)
18 # We would like our source tree to be readonly. However when releases or
19 # pre-releases are generated, the flex/bison generated files as well as the
20 # various formats of manuals need to be included along with the rest of the
21 # sources. Therefore we have --enable-generated-files-in-srcdir to do
23 AC_MSG_CHECKING([for --enable-generated-files-in-srcdir])
24 LIBGOMP_ENABLE(generated-files-in-srcdir, no, ,
25 [put copies of generated files in source dir intended for creating source
26 tarballs for users without texinfo bison or flex.],
28 AC_MSG_RESULT($enable_generated_files_in_srcdir)
29 AM_CONDITIONAL(GENINSRC, test "$enable_generated_files_in_srcdir" = yes)
35 # Gets build, host, target, *_vendor, *_cpu, *_os, etc.
37 # You will slowly go insane if you do not grok the following fact: when
38 # building this library, the top-level /target/ becomes the library's /host/.
40 # configure then causes --target to default to --host, exactly like any
41 # other package using autoconf. Therefore, 'target' and 'host' will
42 # always be the same. This makes sense both for native and cross compilers
43 # just think about it for a little while. :-)
45 # Also, if this library is being configured as part of a cross compiler, the
46 # top-level configure script will pass the "real" host as $with_cross_host.
48 # Do not delete or change the following two lines. For why, see
49 # http://gcc.gnu.org/ml/libstdc++/2003-07/msg00451.html
51 target_alias=${target_alias-$host_alias}
53 # Sets up automake. Must come after AC_CANONICAL_SYSTEM. Each of the
54 # following is magically included in AUTOMAKE_OPTIONS in each Makefile.am.
55 # 1.9.0: minimum required version
56 # no-define: PACKAGE and VERSION will not be #define'd in config.h (a bunch
57 # of other PACKAGE_* variables will, however, and there's nothing
58 # we can do about that; they come from AC_INIT).
59 # foreign: we don't follow the normal rules for GNU packages (no COPYING
60 # file in the top srcdir, etc, etc), so stop complaining.
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 -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/$multi_os_directory ;;
95 AC_SUBST(toolexeclibdir)
98 # The same as in boehm-gc and libstdc++. Have to borrow it from there.
99 # We must force CC to /not/ be precious variables; otherwise
100 # the wrong, non-multilib-adjusted value will be used in multilibs.
101 # As a side effect, we have to subst CFLAGS ourselves.
103 m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
104 m4_define([_AC_ARG_VAR_PRECIOUS],[])
106 m4_rename([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
110 # In order to override CFLAGS_FOR_TARGET, all of our special flags go
111 # in XCFLAGS. But we need them in CFLAGS during configury. So put them
112 # in both places for now and restore CFLAGS at the end of config.
113 save_CFLAGS="$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 $gcc_cv_prog_makeinfo_modern = "yes")
137 AC_SUBST(enable_shared)
138 AC_SUBST(enable_static)
142 # We need gfortran to compile parts of the library
143 # We can't use AC_PROG_FC because it expects a fully working gfortran.
144 #AC_PROG_FC(gfortran)
147 FCFLAGS="$FCFLAGS -Wall"
149 # For libtool versioning info, format is CURRENT:REVISION:AGE
150 libtool_VERSION=1:0:0
151 AC_SUBST(libtool_VERSION)
153 # Check header files.
157 AC_CHECK_HEADERS(unistd.h semaphore.h sys/loadavg.h sys/time.h)
159 GCC_HEADER_STDINT(gstdint.h)
161 # Check to see if -pthread or -lpthread is needed. Prefer the former.
162 # In case the pthread.h system header is not found, this test will fail.
164 CFLAGS="$CFLAGS -pthread"
167 [#include <pthread.h>
168 void *g(void *d) { return NULL; }],
169 [pthread_t t; pthread_create(&t,NULL,g,NULL);])],
170 [XPCFLAGS=" -Wc,-pthread"],
171 [CFLAGS="$save_CFLAGS" LIBS="-lpthread $LIBS"
174 [#include <pthread.h>
175 void *g(void *d) { return NULL; }],
176 [pthread_t t; pthread_create(&t,NULL,g,NULL);])],
178 [AC_MSG_ERROR([Pthreads are required to build libgomp])])])
180 # Check for functions needed.
181 AC_CHECK_FUNCS(getloadavg clock_gettime)
183 # Check for broken semaphore implementation on darwin.
184 # sem_init returns: sem_init error: Function not implemented.
187 AC_DEFINE(HAVE_BROKEN_POSIX_SEMAPHORES, 1,
188 Define if the POSIX Semaphores do not work on your system.)
194 # Check for pthread_{,attr_}[sg]etaffinity_np.
198 #include <pthread.h>],
201 pthread_getaffinity_np (pthread_self (), sizeof (cpu_set_t), &cpuset);
202 if (CPU_ISSET (0, &cpuset))
203 CPU_SET (1, &cpuset);
206 pthread_setaffinity_np (pthread_self (), sizeof (cpu_set_t), &cpuset);
207 pthread_attr_init (&attr);
208 pthread_attr_getaffinity_np (&attr, sizeof (cpu_set_t), &cpuset);
209 pthread_attr_setaffinity_np (&attr, sizeof (cpu_set_t), &cpuset);])],
210 AC_DEFINE(HAVE_PTHREAD_AFFINITY_NP, 1,
211 [ Define if pthread_{,attr_}{g,s}etaffinity_np is supported.]))
213 # At least for glibc, clock_gettime is in librt. But don't pull that
214 # in if it still doesn't give us the function we want.
215 if test $ac_cv_func_clock_gettime = no; then
216 AC_CHECK_LIB(rt, clock_gettime,
218 AC_DEFINE(HAVE_CLOCK_GETTIME, 1,
219 [Define to 1 if you have the `clock_gettime' function.])])
222 # See if we support thread-local storage.
225 # See what sort of export controls are availible.
226 LIBGOMP_CHECK_ATTRIBUTE_VISIBILITY
227 LIBGOMP_CHECK_ATTRIBUTE_DLLEXPORT
228 LIBGOMP_CHECK_ATTRIBUTE_ALIAS
229 LIBGOMP_ENABLE_SYMVERS
231 # Get target configury.
232 . ${srcdir}/configure.tgt
233 CFLAGS="$save_CFLAGS $XCFLAGS"
235 # Check for __sync_val_compare_and_swap, but only after the target has
236 # had a chance to set XCFLAGS.
237 LIBGOMP_CHECK_SYNC_BUILTINS
239 XCFLAGS="$XCFLAGS$XPCFLAGS"
241 AC_SUBST(config_path)
246 CFLAGS="$save_CFLAGS"
249 if test ${multilib} = yes; then
250 multilib_arg="--enable-multilib"
255 # Set up the set of libraries that we need to link against for libgomp.
256 # Note that the GOMP_SELF_SPEC in gcc.c will force -pthread for -fopenmp,
257 # which will force linkage against -lpthread (or equivalent for the system).
258 # That's not 100% ideal, but about the best we can do easily.
259 if test $enable_shared = yes; then
260 link_gomp="-lgomp %{static: $LIBS}"
262 link_gomp="-lgomp $LIBS"
266 AM_CONDITIONAL([USE_FORTRAN], [test "$ac_cv_fc_compiler_gnu" = yes])
268 # ??? 2006-01-24: Paulo committed to asking autoconf folk to document
269 # and export AC_COMPUTE_INT. If that happens, then we'll need to remove
270 # the underscore here and update the PREREQ. If it doesn't, then we'll
271 # need to copy this macro to our acinclude.m4.
272 save_CFLAGS="$CFLAGS"
273 for i in $config_path; do
274 if test -f $srcdir/config/$i/omp-lock.h; then
275 CFLAGS="$CFLAGS -include $srcdir/config/$i/omp-lock.h"
280 _AC_COMPUTE_INT([sizeof (omp_lock_t)], [OMP_LOCK_SIZE],,
281 [AC_MSG_ERROR([unsupported system, cannot find sizeof (omp_lock_t)])])
282 _AC_COMPUTE_INT([__alignof (omp_lock_t)], [OMP_LOCK_ALIGN])
283 _AC_COMPUTE_INT([sizeof (omp_nest_lock_t)], [OMP_NEST_LOCK_SIZE])
284 _AC_COMPUTE_INT([__alignof (omp_nest_lock_t)], [OMP_NEST_LOCK_ALIGN])
286 # If the lock fits in an integer, then arrange for Fortran to use that
287 # integer. If it doesn't, then arrange for Fortran to use a pointer.
288 # Except that we don't have a way at present to multi-lib the installed
289 # Fortran modules, so we assume 8 bytes for pointers, regardless of the
291 OMP_LOCK_KIND=$OMP_LOCK_SIZE
292 OMP_NEST_LOCK_KIND=$OMP_NEST_LOCK_SIZE
293 if test $OMP_LOCK_SIZE -gt 8 || test $OMP_LOCK_ALIGN -gt $OMP_LOCK_SIZE; then
296 if test $OMP_NEST_LOCK_SIZE -gt 8 || test $OMP_NEST_LOCK_ALIGN -gt $OMP_NEST_LOCK_SIZE; then
300 AC_SUBST(OMP_LOCK_SIZE)
301 AC_SUBST(OMP_LOCK_ALIGN)
302 AC_SUBST(OMP_NEST_LOCK_SIZE)
303 AC_SUBST(OMP_NEST_LOCK_ALIGN)
304 AC_SUBST(OMP_LOCK_KIND)
305 AC_SUBST(OMP_NEST_LOCK_KIND)
306 CFLAGS="$save_CFLAGS"
308 AC_CONFIG_FILES(omp.h omp_lib.h omp_lib.f90 libgomp_f.h)
309 AC_CONFIG_FILES(Makefile testsuite/Makefile libgomp.spec)