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953ff289 DN |
1 | # Process this file with autoconf to produce a configure script, like so: |
2 | # aclocal -I ../config && autoconf && autoheader && automake | |
3 | ||
4 | AC_PREREQ(2.59) | |
5 | AC_INIT([GNU OpenMP Runtime Library], 1.0,,[libgomp]) | |
6 | AC_CONFIG_HEADER(config.h) | |
7 | ||
8 | # ------- | |
9 | # Options | |
10 | # ------- | |
11 | ||
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], | |
15 | permit yes|no) | |
16 | AC_MSG_RESULT($enable_version_specific_runtime_libs) | |
17 | ||
18 | AC_MSG_CHECKING([for --enable-linux-futex]) | |
fe5568e9 | 19 | LIBGOMP_ENABLE(linux-futex, default, , |
953ff289 | 20 | [Use the Linux futex system call], |
fe5568e9 | 21 | permit yes|no|default) |
953ff289 DN |
22 | AC_MSG_RESULT($enable_linux_futex) |
23 | ||
3721b9e1 DF |
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 | |
28 | # just that. | |
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.], | |
33 | permit yes|no) | |
34 | AC_MSG_RESULT($enable_generated_files_in_srcdir) | |
35 | AM_CONDITIONAL(GENINSRC, test "$enable_generated_files_in_srcdir" = yes) | |
36 | ||
37 | ||
953ff289 DN |
38 | # ------- |
39 | # ------- | |
40 | ||
41 | # Gets build, host, target, *_vendor, *_cpu, *_os, etc. | |
42 | # | |
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/. | |
45 | # | |
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. :-) | |
50 | # | |
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 $with_cross_host. | |
53 | # | |
54 | # Do not delete or change the following two lines. For why, see | |
55 | # http://gcc.gnu.org/ml/libstdc++/2003-07/msg00451.html | |
56 | AC_CANONICAL_SYSTEM | |
57 | target_alias=${target_alias-$host_alias} | |
58 | ||
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. | |
953ff289 DN |
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(, ..) | |
72 | ||
73 | # Calculate toolexeclibdir | |
74 | # Also toolexecdir, though it's only used in toolexeclibdir | |
75 | case ${enable_version_specific_runtime_libs} in | |
76 | yes) | |
77 | # Need the gcc compiler version to know where to install libraries | |
78 | # and header files if --enable-version-specific-runtime-libs option | |
79 | # is selected. | |
80 | toolexecdir='$(libdir)/gcc/$(target_alias)' | |
81 | toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)' | |
82 | ;; | |
83 | no) | |
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='$(toolexecdir)/lib' | |
89 | else | |
90 | toolexecdir='$(libdir)/gcc-lib/$(target_alias)' | |
91 | toolexeclibdir='$(libdir)' | |
92 | fi | |
93 | multi_os_directory=`$CC -print-multi-os-directory` | |
94 | case $multi_os_directory in | |
95 | .) ;; # Avoid trailing /. | |
96 | *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;; | |
97 | esac | |
98 | ;; | |
99 | esac | |
100 | AC_SUBST(toolexecdir) | |
101 | AC_SUBST(toolexeclibdir) | |
102 | ||
103 | # Check the compiler. | |
104 | # The same as in boehm-gc and libstdc++. Have to borrow it from there. | |
105 | # We must force CC to /not/ be precious variables; otherwise | |
106 | # the wrong, non-multilib-adjusted value will be used in multilibs. | |
107 | # As a side effect, we have to subst CFLAGS ourselves. | |
108 | ||
109 | m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS]) | |
110 | m4_define([_AC_ARG_VAR_PRECIOUS],[]) | |
111 | AC_PROG_CC | |
112 | m4_rename([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS]) | |
113 | ||
114 | AC_SUBST(CFLAGS) | |
115 | ||
116 | # In order to override CFLAGS_FOR_TARGET, all of our special flags go | |
117 | # in XCFLAGS. But we need them in CFLAGS during configury. So put them | |
118 | # in both places for now and restore CFLAGS at the end of config. | |
119 | save_CFLAGS="$CFLAGS" | |
120 | ||
121 | # Add -Wall -Werror if we are using GCC. | |
122 | if test "x$GCC" = "xyes"; then | |
123 | XCFLAGS="$XCFLAGS -Wall -Werror" | |
124 | fi | |
125 | ||
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) | |
130 | AC_PROG_MAKE_SET | |
131 | AC_PROG_INSTALL | |
132 | ||
133 | # Configure libtool | |
134 | AM_PROG_LIBTOOL | |
135 | AC_SUBST(enable_shared) | |
136 | AC_SUBST(enable_static) | |
137 | ||
c41303c6 RH |
138 | AM_MAINTAINER_MODE |
139 | ||
953ff289 DN |
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) | |
143 | FC="$GFORTRAN" | |
144 | AC_PROG_FC(gfortran) | |
145 | FCFLAGS="$FCFLAGS -Wall" | |
146 | ||
147 | # For libtool versioning info, format is CURRENT:REVISION:AGE | |
148 | libtool_VERSION=1:0:0 | |
149 | AC_SUBST(libtool_VERSION) | |
150 | ||
151 | # Check header files. | |
152 | AC_STDC_HEADERS | |
153 | AC_HEADER_TIME | |
192a50ad | 154 | AC_CHECK_HEADERS(unistd.h semaphore.h sys/loadavg.h sys/time.h) |
953ff289 | 155 | |
18cbfd85 PB |
156 | GCC_HEADER_STDINT(gstdint.h) |
157 | ||
953ff289 | 158 | # Check to see if -pthread or -lpthread is needed. Prefer the former. |
124452c9 | 159 | # In case the pthread.h system header is not found, this test will fail. |
953ff289 | 160 | XPCFLAGS="" |
a1daed2d EC |
161 | |
162 | # Darwin doesn't need the -pthread option since threads are in libSystem | |
953ff289 DN |
163 | AC_LINK_IFELSE( |
164 | [AC_LANG_PROGRAM( | |
165 | [#include <pthread.h> | |
166 | void *g(void *d) { return NULL; }], | |
167 | [pthread_t t; pthread_create(&t,NULL,g,NULL);])], | |
a1daed2d EC |
168 | [case $host in |
169 | *-darwin*) | |
170 | ;; | |
171 | default) | |
172 | XPCFLAGS=" -Wc,-pthread" | |
173 | ;; | |
174 | esac], | |
953ff289 DN |
175 | [CFLAGS="$save_CFLAGS" LIBS="-lpthread $LIBS" |
176 | AC_LINK_IFELSE( | |
177 | [AC_LANG_PROGRAM( | |
178 | [#include <pthread.h> | |
179 | void *g(void *d) { return NULL; }], | |
180 | [pthread_t t; pthread_create(&t,NULL,g,NULL);])], | |
181 | [], | |
182 | [AC_MSG_ERROR([Pthreads are required to build libgomp])])]) | |
183 | ||
184 | # Check for functions needed. | |
185 | AC_CHECK_FUNCS(getloadavg clock_gettime) | |
186 | ||
d349482e AT |
187 | # Check for broken semaphore implementation on darwin. |
188 | # sem_init returns: sem_init error: Function not implemented. | |
189 | case "$host" in | |
190 | *-darwin*) | |
191 | AC_DEFINE(HAVE_BROKEN_POSIX_SEMAPHORES, 1, | |
192 | Define if the POSIX Semaphores do not work on your system.) | |
193 | ;; | |
fe5568e9 JJ |
194 | *-linux*) |
195 | case "$enable_linux_futex" in | |
196 | default) | |
197 | # If headers don't have gettid/futex syscalls definition, then | |
198 | # default to no, otherwise there will be compile time failures. | |
199 | # Otherwise, default to yes. If we don't detect we are | |
200 | # compiled/linked against NPTL and not cross-compiling, check | |
201 | # if programs are run by default against NPTL and if not, issue | |
202 | # a warning. | |
203 | enable_linux_futex=no | |
204 | AC_LINK_IFELSE( | |
205 | [AC_LANG_PROGRAM( | |
206 | [#include <sys/syscall.h> | |
207 | int lk;], | |
208 | [syscall (SYS_gettid); syscall (SYS_futex, &lk, 0, 0, 0);])], | |
209 | [AC_LINK_IFELSE( | |
210 | [AC_LANG_PROGRAM( | |
211 | [#ifndef _GNU_SOURCE | |
212 | #define _GNU_SOURCE 1 | |
213 | #endif | |
214 | #include <pthread.h> | |
215 | pthread_t th; void *status;], | |
216 | [pthread_tryjoin_np (th, &status);])],[enable_linux_futex=yes], | |
217 | [if test x$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]) | |
222 | fi | |
223 | fi | |
224 | enable_linux_futex=yes])]) | |
225 | ;; | |
226 | yes) | |
227 | AC_LINK_IFELSE( | |
228 | [AC_LANG_PROGRAM( | |
229 | [#include <sys/syscall.h> | |
230 | int lk;], | |
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])]) | |
233 | ;; | |
234 | esac | |
235 | ;; | |
d349482e AT |
236 | esac |
237 | ||
953ff289 DN |
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, | |
242 | [LIBS="-lrt $LIBS" | |
c663e301 | 243 | AC_DEFINE(HAVE_CLOCK_GETTIME, 1, |
953ff289 DN |
244 | [Define to 1 if you have the `clock_gettime' function.])]) |
245 | fi | |
246 | ||
247 | # See if we support thread-local storage. | |
60e1758f | 248 | GCC_CHECK_TLS |
953ff289 DN |
249 | |
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 | |
255 | ||
256 | # Get target configury. | |
257 | . ${srcdir}/configure.tgt | |
258 | CFLAGS="$save_CFLAGS $XCFLAGS" | |
259 | ||
260 | # Check for __sync_val_compare_and_swap, but only after the target has | |
261 | # had a chance to set XCFLAGS. | |
262 | LIBGOMP_CHECK_SYNC_BUILTINS | |
263 | ||
264 | XCFLAGS="$XCFLAGS$XPCFLAGS" | |
265 | ||
266 | AC_SUBST(config_path) | |
267 | AC_SUBST(XCFLAGS) | |
268 | AC_SUBST(XLDFLAGS) | |
269 | ||
270 | # Cleanup and exit. | |
271 | CFLAGS="$save_CFLAGS" | |
272 | AC_CACHE_SAVE | |
273 | ||
274 | if test ${multilib} = yes; then | |
275 | multilib_arg="--enable-multilib" | |
276 | else | |
277 | multilib_arg= | |
278 | fi | |
279 | ||
280 | # Set up the set of libraries that we need to link against for libgomp. | |
192a50ad | 281 | # Note that the GOMP_SELF_SPEC in gcc.c will force -pthread for -fopenmp, |
953ff289 DN |
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}" | |
286 | else | |
287 | link_gomp="-lgomp $LIBS" | |
288 | fi | |
289 | AC_SUBST(link_gomp) | |
290 | ||
291 | AM_CONDITIONAL([USE_FORTRAN], [test "$ac_cv_fc_compiler_gnu" = yes]) | |
292 | ||
03b8fe49 PB |
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" | |
301 | break | |
302 | fi | |
303 | done | |
304 | ||
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]) | |
310 | ||
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 | |
315 | # actual target. | |
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 | |
319 | OMP_LOCK_KIND=8 | |
320 | fi | |
321 | if test $OMP_NEST_LOCK_SIZE -gt 8 || test $OMP_NEST_LOCK_ALIGN -gt $OMP_NEST_LOCK_SIZE; then | |
322 | OMP_NEST_LOCK_KIND=8 | |
323 | fi | |
324 | ||
325 | AC_SUBST(OMP_LOCK_SIZE) | |
326 | AC_SUBST(OMP_LOCK_ALIGN) | |
327 | AC_SUBST(OMP_NEST_LOCK_SIZE) | |
328 | AC_SUBST(OMP_NEST_LOCK_ALIGN) | |
329 | AC_SUBST(OMP_LOCK_KIND) | |
330 | AC_SUBST(OMP_NEST_LOCK_KIND) | |
331 | CFLAGS="$save_CFLAGS" | |
332 | ||
333 | AC_CONFIG_FILES(omp.h omp_lib.h omp_lib.f90 libgomp_f.h) | |
953ff289 DN |
334 | AC_CONFIG_FILES(Makefile testsuite/Makefile libgomp.spec) |
335 | AC_OUTPUT |