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 GCC_WITH_TOOLEXECLIBDIR
69 # Calculate toolexeclibdir
70 # Also toolexecdir, though it's only used in toolexeclibdir
71 case ${enable_version_specific_runtime_libs} in
73 # Need the gcc compiler version to know where to install libraries
74 # and header files if --enable-version-specific-runtime-libs option
76 toolexecdir='$(libdir)/gcc/$(target_alias)'
77 toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)'
80 if test -n "$with_cross_host" &&
81 test x"$with_cross_host" != x"no"; then
82 # Install a library built with a cross compiler in tooldir, not libdir.
83 toolexecdir='$(exec_prefix)/$(target_alias)'
84 case ${with_toolexeclibdir} in
86 toolexeclibdir='$(toolexecdir)/lib'
89 toolexeclibdir=${with_toolexeclibdir}
93 toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
94 toolexeclibdir='$(libdir)'
96 multi_os_directory=`$CC -print-multi-os-directory`
97 case $multi_os_directory in
98 .) ;; # Avoid trailing /.
99 *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
103 AC_SUBST(toolexecdir)
104 AC_SUBST(toolexeclibdir)
106 # Check the compiler.
107 # The same as in boehm-gc and libstdc++. Have to borrow it from there.
108 # We must force CC to /not/ be precious variables; otherwise
109 # the wrong, non-multilib-adjusted value will be used in multilibs.
110 # As a side effect, we have to subst CFLAGS ourselves.
112 m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
113 m4_define([_AC_ARG_VAR_PRECIOUS],[])
115 m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
119 # In order to override CFLAGS_FOR_TARGET, all of our special flags go
120 # in XCFLAGS. But we need them in CFLAGS during configury. So put them
121 # in both places for now and restore CFLAGS at the end of config.
122 save_CFLAGS="$CFLAGS"
124 AC_ARG_ENABLE([werror],
125 [AS_HELP_STRING([--disable-werror], [disable building with -Werror])])
126 # Add -Wall -Werror if we are using GCC.
127 AS_IF([test "x$GCC" = "xyes"],
128 [XCFLAGS="$XCFLAGS -Wall"])
129 AS_IF([test "x$enable_werror" != "xno" && test "x$GCC" = "xyes"],
130 [XCFLAGS="$XCFLAGS -Werror"])
132 # Find other programs we need.
133 AC_CHECK_TOOL(AR, ar)
134 AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error)
138 # See if makeinfo has been installed and is modern enough
139 # that we can use it.
140 ACX_CHECK_PROG_VER([MAKEINFO], [makeinfo], [--version],
141 [GNU texinfo.* \([0-9][0-9.]*\)],
142 [4.[4-9]*|4.[1-9][0-9]*|[5-9]*|[1-9][0-9]*])
143 AM_CONDITIONAL(BUILD_INFO, test $gcc_cv_prog_makeinfo_modern = "yes")
149 AC_SUBST(enable_shared)
150 AC_SUBST(enable_static)
154 # We optionally test libgomp C++ support, and for that want to use the proper
155 # C++ driver, 'g++' (or 'xg++' for build-tree testing). Given that build of
156 # target libstdc++-v3 depends on target libgomp (see '../Makefile.def'), we
157 # cannot make build of target libgomp depend on target libstdc++-v3: circular
158 # dependency. We thus cannot instantiate 'AC_PROG_CXX' here: we'd get
159 # '-funconfigured-libstdc++-v3' (see '../configure.ac'). Therefore, just
160 # capture 'CXX', and we'll fix this up at 'make check' time (see
161 # 'testsuite/lib/libgomp.exp:libgomp_init').
164 # Create a spec file, so that compile/link tests don't fail
165 test -f libgfortran.spec || touch libgfortran.spec
166 FCFLAGS="$FCFLAGS -L."
168 # We need 'gfortran' to compile parts of the library, and test libgomp Fortran
170 # We can't use AC_PROG_FC because it expects a fully working gfortran.
171 #AC_PROG_FC(gfortran)
172 case `echo $GFORTRAN` in
176 set dummy $GFORTRAN; ac_word=$2
177 if test -x "$ac_word"; then
184 FCFLAGS="$FCFLAGS -Wall -L../libgfortran"
186 # For libtool versioning info, format is CURRENT:REVISION:AGE
187 libtool_VERSION=1:0:0
188 AC_SUBST(libtool_VERSION)
190 # Check header files.
194 AC_CHECK_HEADERS(pthread.h unistd.h semaphore.h sys/loadavg.h sys/sysctl.h sys/time.h)
199 # RTEMS supports Pthreads, but the library is not available at GCC build time.
201 nvptx*-*-* | amdgcn*-*-*)
202 # NVPTX does not support Pthreads, has its own code replacement.
203 libgomp_use_pthreads=no
204 # NVPTX is an accelerator-only target
205 libgomp_offloaded_only=yes
208 # Check to see if -pthread or -lpthread is needed. Prefer the former.
209 # In case the pthread.h system header is not found, this test will fail.
210 CFLAGS="$CFLAGS -pthread"
213 [#include <pthread.h>
214 void *g(void *d) { return NULL; }],
215 [pthread_t t; pthread_create(&t,NULL,g,NULL);])],
216 [XPCFLAGS=" -Wc,-pthread"],
217 [CFLAGS="$save_CFLAGS" LIBS="-lpthread $LIBS"
220 [#include <pthread.h>
221 void *g(void *d) { return NULL; }],
222 [pthread_t t; pthread_create(&t,NULL,g,NULL);])],
224 [AC_MSG_ERROR([Pthreads are required to build libgomp])])])
227 if test x$libgomp_use_pthreads != xno; then
228 AC_DEFINE(LIBGOMP_USE_PTHREADS, 1,
229 [Define to 1 if libgomp should use POSIX threads.])
232 if test x$libgomp_offloaded_only = xyes; then
233 AC_DEFINE(LIBGOMP_OFFLOADED_ONLY, 1,
234 [Define to 1 if building libgomp for an accelerator-only target.])
237 if test "x$enable_offload_defaulted" = xyes; then
238 AC_DEFINE(OFFLOAD_DEFAULTED, 1,
239 [Define to 1 to if -foffload is defaulted])
242 AC_CHECK_SIZEOF([void *])
244 m4_include([plugin/configfrag.ac])
246 # Check for functions needed.
247 AC_CHECK_FUNCS(getloadavg clock_gettime strtoull)
248 AC_CHECK_FUNCS(aligned_alloc posix_memalign memalign _aligned_malloc)
250 # Check for broken semaphore implementation on darwin.
251 # sem_init returns: sem_init error: Function not implemented.
254 AC_DEFINE(HAVE_BROKEN_POSIX_SEMAPHORES, 1,
255 Define if the POSIX Semaphores do not work on your system.)
259 # RTEMS specific checks
262 AC_CHECK_TYPES([struct _Mutex_Control],[],[],[#include <sys/lock.h>])
268 # Check for pthread_{,attr_}[sg]etaffinity_np.
272 #include <pthread.h>],
275 pthread_getaffinity_np (pthread_self (), sizeof (cpu_set_t), &cpuset);
276 if (CPU_ISSET (0, &cpuset))
277 CPU_SET (1, &cpuset);
280 pthread_setaffinity_np (pthread_self (), sizeof (cpu_set_t), &cpuset);
281 pthread_attr_init (&attr);
282 pthread_attr_getaffinity_np (&attr, sizeof (cpu_set_t), &cpuset);
283 pthread_attr_setaffinity_np (&attr, sizeof (cpu_set_t), &cpuset);])],
284 AC_DEFINE(HAVE_PTHREAD_AFFINITY_NP, 1,
285 [ Define if pthread_{,attr_}{g,s}etaffinity_np is supported.]))
287 # At least for glibc, clock_gettime is in librt. But don't pull that
288 # in if it still doesn't give us the function we want.
289 if test $ac_cv_func_clock_gettime = no; then
290 AC_CHECK_LIB(rt, clock_gettime,
292 AC_DEFINE(HAVE_CLOCK_GETTIME, 1,
293 [Define to 1 if you have the `clock_gettime' function.])])
301 #include <sys/utsname.h>],
303 volatile size_t len = 0;
305 len = strlen (buf.nodename);])],
306 AC_DEFINE(HAVE_UNAME, 1,
307 [ Define if uname is supported and struct utsname has nodename field.]))
309 # Check for gethostname.
312 [#include <unistd.h>],
316 if (gethostname (buf, sizeof (buf) - 1) == 0)
320 AC_DEFINE(HAVE_GETHOSTNAME, 1,
321 [ Define if gethostname is supported.]))
326 [#include <unistd.h>],
327 [int pid = getpid ();])],
328 AC_DEFINE(HAVE_GETPID, 1,
329 [ Define if getpid is supported.]))
331 # See if we support thread-local storage.
334 # See if we have emulated thread-local storage.
337 # See what sort of export controls are available.
338 LIBGOMP_CHECK_ATTRIBUTE_VISIBILITY
339 LIBGOMP_CHECK_ATTRIBUTE_DLLEXPORT
340 LIBGOMP_CHECK_ATTRIBUTE_ALIAS
341 LIBGOMP_ENABLE_SYMVERS
343 if test $enable_symvers = gnu; then
344 AC_DEFINE(LIBGOMP_GNU_SYMBOL_VERSIONING, 1,
345 [Define to 1 if GNU symbol versioning is used for libgomp.])
348 # Determine cpu count to limit testsuite parallelism.
352 AC_MSG_NOTICE([checking for flock implementation])
353 AC_CHECK_PROGS(FLOCK, flock)
354 # Fallback if 'perl' is available.
355 if test -z "$FLOCK"; then
356 AC_CHECK_PROG(FLOCK, perl, $srcdir/testsuite/flock)
359 # Get target configury.
360 . ${srcdir}/configure.tgt
361 CFLAGS="$save_CFLAGS $XCFLAGS"
363 # Check for __sync_val_compare_and_swap, but only after the target has
364 # had a chance to set XCFLAGS.
365 LIBGOMP_CHECK_SYNC_BUILTINS
367 XCFLAGS="$XCFLAGS$XPCFLAGS"
369 # Add CET specific flags if CET is enabled
370 GCC_CET_FLAGS(CET_FLAGS)
371 XCFLAGS="$XCFLAGS $CET_FLAGS"
372 FCFLAGS="$FCFLAGS $CET_FLAGS"
374 AC_SUBST(config_path)
378 # Conditionalize the makefile for this target machine.
380 for f in ${tmake_file}
382 if test -f ${srcdir}/config/$f
384 tmake_file_="${tmake_file_} \$(srcdir)/config/$f"
387 tmake_file="${tmake_file_}"
391 CFLAGS="$save_CFLAGS"
394 if test ${multilib} = yes; then
395 multilib_arg="--enable-multilib"
400 # Set up the set of libraries that we need to link against for libgomp.
401 # Note that the GOMP_SELF_SPEC in gcc.c may force -pthread,
402 # which will force linkage against -lpthread (or equivalent for the system).
403 # That's not 100% ideal, but about the best we can do easily.
404 if test $enable_shared = yes; then
405 link_gomp="-lgomp %{static: $LIBS${DL_LIBS:+ $DL_LIBS}}"
407 link_gomp="-lgomp $LIBS${DL_LIBS:+ $DL_LIBS}"
411 AM_CONDITIONAL([USE_FORTRAN], [test "$ac_cv_fc_compiler_gnu" = yes])
413 # ??? 2006-01-24: Paulo committed to asking autoconf folk to document
414 # and export AC_COMPUTE_INT. If that happens, then we'll need to remove
415 # the underscore here and update the PREREQ. If it doesn't, then we'll
416 # need to copy this macro to our acinclude.m4.
417 save_CFLAGS="$CFLAGS"
418 for i in $config_path; do
419 if test -f $srcdir/config/$i/omp-lock.h; then
420 CFLAGS="$CFLAGS -include confdefs.h -include $srcdir/config/$i/omp-lock.h"
425 _AC_COMPUTE_INT([sizeof (__INTPTR_TYPE__)], [INTPTR_T_KIND])
426 _AC_COMPUTE_INT([sizeof (__int128)], [OMP_INT128_SIZE],,[OMP_INT128_SIZE=0])
427 _AC_COMPUTE_INT([2*sizeof (__INTPTR_TYPE__)], [OMP_DEPEND_KIND],,
429 _AC_COMPUTE_INT([sizeof (omp_lock_t)], [OMP_LOCK_SIZE],,
430 [AC_MSG_ERROR([unsupported system, cannot find sizeof (omp_lock_t)])])
431 _AC_COMPUTE_INT([__alignof (omp_lock_t)], [OMP_LOCK_ALIGN])
432 _AC_COMPUTE_INT([sizeof (omp_nest_lock_t)], [OMP_NEST_LOCK_SIZE])
433 _AC_COMPUTE_INT([__alignof (omp_nest_lock_t)], [OMP_NEST_LOCK_ALIGN])
434 _AC_COMPUTE_INT([sizeof (omp_lock_25_t)], [OMP_LOCK_25_SIZE],,
435 [AC_MSG_ERROR([unsupported system, cannot find sizeof (omp_lock_25_t)])])
436 _AC_COMPUTE_INT([__alignof (omp_lock_25_t)], [OMP_LOCK_25_ALIGN])
437 _AC_COMPUTE_INT([sizeof (omp_nest_lock_25_t)], [OMP_NEST_LOCK_25_SIZE])
438 _AC_COMPUTE_INT([__alignof (omp_nest_lock_25_t)], [OMP_NEST_LOCK_25_ALIGN])
440 # If the lock fits in an integer, then arrange for Fortran to use that
441 # integer. If it doesn't, then arrange for Fortran to use a pointer.
442 # Except that we don't have a way at present to multi-lib the installed
443 # Fortran modules, so we assume 8 bytes for pointers, regardless of the
445 OMP_LOCK_KIND=$OMP_LOCK_SIZE
446 OMP_NEST_LOCK_KIND=$OMP_NEST_LOCK_SIZE
447 if test $OMP_LOCK_SIZE -gt 8 || test $OMP_LOCK_ALIGN -gt $OMP_LOCK_SIZE; then
450 if test $OMP_NEST_LOCK_SIZE -gt 8 || test $OMP_NEST_LOCK_ALIGN -gt $OMP_NEST_LOCK_SIZE; then
453 OMP_LOCK_25_KIND=$OMP_LOCK_25_SIZE
454 OMP_NEST_LOCK_25_KIND=$OMP_NEST_LOCK_25_SIZE
455 if test $OMP_LOCK_25_SIZE -gt 8 || test $OMP_LOCK_25_ALIGN -gt $OMP_LOCK_25_SIZE; then
458 if test $OMP_NEST_LOCK_25_SIZE -gt 8 || test $OMP_NEST_LOCK_25_ALIGN -gt $OMP_NEST_LOCK_25_SIZE; then
459 OMP_NEST_LOCK_25_KIND=8
461 if test "$ac_cv_fc_compiler_gnu" = yes; then
462 if test $OMP_DEPEND_KIND -eq 16; then
463 if test $OMP_INT128_SIZE -ne 16; then
464 AC_MSG_ERROR([unsupported system, cannot find Fortran int kind=16, needed for omp_depend_kind])
467 if test $OMP_DEPEND_KIND -ne 8; then
468 AC_MSG_ERROR([unsupported system, cannot find Fortran integer kind for omp_depend_kind])
473 AC_SUBST(INTPTR_T_KIND)
474 AC_SUBST(OMP_LOCK_SIZE)
475 AC_SUBST(OMP_LOCK_ALIGN)
476 AC_SUBST(OMP_NEST_LOCK_SIZE)
477 AC_SUBST(OMP_NEST_LOCK_ALIGN)
478 AC_SUBST(OMP_LOCK_KIND)
479 AC_SUBST(OMP_NEST_LOCK_KIND)
480 AC_SUBST(OMP_LOCK_25_SIZE)
481 AC_SUBST(OMP_LOCK_25_ALIGN)
482 AC_SUBST(OMP_NEST_LOCK_25_SIZE)
483 AC_SUBST(OMP_NEST_LOCK_25_ALIGN)
484 AC_SUBST(OMP_LOCK_25_KIND)
485 AC_SUBST(OMP_NEST_LOCK_25_KIND)
486 AC_SUBST(OMP_DEPEND_KIND)
487 CFLAGS="$save_CFLAGS"
489 # Determine what GCC version number to use in filesystem paths.
492 AC_CONFIG_FILES(omp.h omp_lib.h omp_lib.f90 libgomp_f.h)
493 AC_CONFIG_FILES(Makefile testsuite/Makefile libgomp.spec)
494 AC_CONFIG_FILES([testsuite/libgomp-test-support.pt.exp:testsuite/libgomp-test-support.exp.in])
495 AC_CONFIG_FILES([testsuite/libgomp-site-extra.exp])