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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($enable_version_specific_runtime_libs) | |
17 | ||
18 | AC_MSG_CHECKING([for --enable-linux-futex]) | |
19 | LIBGOMP_ENABLE(linux-futex, yes, | |
20 | [Use the Linux futex system call], | |
21 | permit yes|no) | |
22 | AC_MSG_RESULT($enable_linux_futex) | |
23 | ||
24 | # ------- | |
25 | # ------- | |
26 | ||
27 | # Gets build, host, target, *_vendor, *_cpu, *_os, etc. | |
28 | # | |
29 | # You will slowly go insane if you do not grok the following fact: when | |
30 | # building this library, the top-level /target/ becomes the library's /host/. | |
31 | # | |
32 | # configure then causes --target to default to --host, exactly like any | |
33 | # other package using autoconf. Therefore, 'target' and 'host' will | |
34 | # always be the same. This makes sense both for native and cross compilers | |
35 | # just think about it for a little while. :-) | |
36 | # | |
37 | # Also, if this library is being configured as part of a cross compiler, the | |
38 | # top-level configure script will pass the "real" host as $with_cross_host. | |
39 | # | |
40 | # Do not delete or change the following two lines. For why, see | |
41 | # http://gcc.gnu.org/ml/libstdc++/2003-07/msg00451.html | |
42 | AC_CANONICAL_SYSTEM | |
43 | target_alias=${target_alias-$host_alias} | |
44 | ||
45 | # Sets up automake. Must come after AC_CANONICAL_SYSTEM. Each of the | |
46 | # following is magically included in AUTOMAKE_OPTIONS in each Makefile.am. | |
47 | # 1.9.0: minimum required version | |
48 | # no-define: PACKAGE and VERSION will not be #define'd in config.h (a bunch | |
49 | # of other PACKAGE_* variables will, however, and there's nothing | |
50 | # we can do about that; they come from AC_INIT). | |
51 | # foreign: we don't follow the normal rules for GNU packages (no COPYING | |
52 | # file in the top srcdir, etc, etc), so stop complaining. | |
53 | # no-dependencies: turns off auto dependency generation (just for now) | |
54 | # -Wall: turns on all automake warnings... | |
55 | # -Wno-portability: ...except this one, since GNU make is required. | |
56 | # -Wno-override: ... and this one, since we do want this in testsuite. | |
57 | AM_INIT_AUTOMAKE([1.9.0 foreign -Wall -Wno-portability -Wno-override]) | |
58 | AM_ENABLE_MULTILIB(, ..) | |
59 | ||
60 | # Calculate toolexeclibdir | |
61 | # Also toolexecdir, though it's only used in toolexeclibdir | |
62 | case ${enable_version_specific_runtime_libs} in | |
63 | yes) | |
64 | # Need the gcc compiler version to know where to install libraries | |
65 | # and header files if --enable-version-specific-runtime-libs option | |
66 | # is selected. | |
67 | toolexecdir='$(libdir)/gcc/$(target_alias)' | |
68 | toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)' | |
69 | ;; | |
70 | no) | |
71 | if test -n "$with_cross_host" && | |
72 | test x"$with_cross_host" != x"no"; then | |
73 | # Install a library built with a cross compiler in tooldir, not libdir. | |
74 | toolexecdir='$(exec_prefix)/$(target_alias)' | |
75 | toolexeclibdir='$(toolexecdir)/lib' | |
76 | else | |
77 | toolexecdir='$(libdir)/gcc-lib/$(target_alias)' | |
78 | toolexeclibdir='$(libdir)' | |
79 | fi | |
80 | multi_os_directory=`$CC -print-multi-os-directory` | |
81 | case $multi_os_directory in | |
82 | .) ;; # Avoid trailing /. | |
83 | *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;; | |
84 | esac | |
85 | ;; | |
86 | esac | |
87 | AC_SUBST(toolexecdir) | |
88 | AC_SUBST(toolexeclibdir) | |
89 | ||
90 | # Check the compiler. | |
91 | # The same as in boehm-gc and libstdc++. Have to borrow it from there. | |
92 | # We must force CC to /not/ be precious variables; otherwise | |
93 | # the wrong, non-multilib-adjusted value will be used in multilibs. | |
94 | # As a side effect, we have to subst CFLAGS ourselves. | |
95 | ||
96 | m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS]) | |
97 | m4_define([_AC_ARG_VAR_PRECIOUS],[]) | |
98 | AC_PROG_CC | |
99 | m4_rename([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS]) | |
100 | ||
101 | AC_SUBST(CFLAGS) | |
102 | ||
103 | # In order to override CFLAGS_FOR_TARGET, all of our special flags go | |
104 | # in XCFLAGS. But we need them in CFLAGS during configury. So put them | |
105 | # in both places for now and restore CFLAGS at the end of config. | |
106 | save_CFLAGS="$CFLAGS" | |
107 | ||
108 | # Add -Wall -Werror if we are using GCC. | |
109 | if test "x$GCC" = "xyes"; then | |
110 | XCFLAGS="$XCFLAGS -Wall -Werror" | |
111 | fi | |
112 | ||
113 | # Find other programs we need. | |
114 | AC_CHECK_TOOL(AR, ar) | |
115 | AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error) | |
116 | AC_PATH_PROG(PERL, perl, perl-not-found-in-path-error) | |
117 | AC_PROG_MAKE_SET | |
118 | AC_PROG_INSTALL | |
119 | ||
120 | # Configure libtool | |
121 | AM_PROG_LIBTOOL | |
122 | AC_SUBST(enable_shared) | |
123 | AC_SUBST(enable_static) | |
124 | ||
125 | # We need gfortran to compile parts of the library | |
126 | # We can't use AC_PROG_FC because it expects a fully working gfortran. | |
127 | #AC_PROG_FC(gfortran) | |
128 | FC="$GFORTRAN" | |
129 | AC_PROG_FC(gfortran) | |
130 | FCFLAGS="$FCFLAGS -Wall" | |
131 | ||
132 | # For libtool versioning info, format is CURRENT:REVISION:AGE | |
133 | libtool_VERSION=1:0:0 | |
134 | AC_SUBST(libtool_VERSION) | |
135 | ||
136 | # Check header files. | |
137 | AC_STDC_HEADERS | |
138 | AC_HEADER_TIME | |
139 | AC_CHECK_HEADERS(unistd.h semaphore.h sys/loadavg.h sys/time.h) | |
140 | AC_CHECK_HEADER([pthread.h],[], | |
141 | [AC_MSG_ERROR([Pthreads are required to build libgomp])]) | |
142 | ||
143 | # Check to see if -pthread or -lpthread is needed. Prefer the former. | |
144 | XPCFLAGS="" | |
145 | CFLAGS="$CFLAGS -pthread" | |
146 | AC_LINK_IFELSE( | |
147 | [AC_LANG_PROGRAM( | |
148 | [#include <pthread.h> | |
149 | void *g(void *d) { return NULL; }], | |
150 | [pthread_t t; pthread_create(&t,NULL,g,NULL);])], | |
151 | [XPCFLAGS=" -Wc,-pthread"], | |
152 | [CFLAGS="$save_CFLAGS" LIBS="-lpthread $LIBS" | |
153 | AC_LINK_IFELSE( | |
154 | [AC_LANG_PROGRAM( | |
155 | [#include <pthread.h> | |
156 | void *g(void *d) { return NULL; }], | |
157 | [pthread_t t; pthread_create(&t,NULL,g,NULL);])], | |
158 | [], | |
159 | [AC_MSG_ERROR([Pthreads are required to build libgomp])])]) | |
160 | ||
161 | # Check for functions needed. | |
162 | AC_CHECK_FUNCS(getloadavg clock_gettime) | |
163 | ||
164 | # At least for glibc, clock_gettime is in librt. But don't pull that | |
165 | # in if it still doesn't give us the function we want. | |
166 | if test $ac_cv_func_clock_gettime = no; then | |
167 | AC_CHECK_LIB(rt, clock_gettime, | |
168 | [LIBS="-lrt $LIBS" | |
169 | AC_DEFINE(HAVE_CLOCK_GETTIME, | |
170 | [Define to 1 if you have the `clock_gettime' function.])]) | |
171 | fi | |
172 | ||
173 | # See if we support thread-local storage. | |
174 | LIBGOMP_CHECK_TLS | |
175 | ||
176 | # See what sort of export controls are availible. | |
177 | LIBGOMP_CHECK_ATTRIBUTE_VISIBILITY | |
178 | LIBGOMP_CHECK_ATTRIBUTE_DLLEXPORT | |
179 | LIBGOMP_CHECK_ATTRIBUTE_ALIAS | |
180 | LIBGOMP_ENABLE_SYMVERS | |
181 | ||
182 | # Get target configury. | |
183 | . ${srcdir}/configure.tgt | |
184 | CFLAGS="$save_CFLAGS $XCFLAGS" | |
185 | ||
186 | # Check for __sync_val_compare_and_swap, but only after the target has | |
187 | # had a chance to set XCFLAGS. | |
188 | LIBGOMP_CHECK_SYNC_BUILTINS | |
189 | ||
190 | XCFLAGS="$XCFLAGS$XPCFLAGS" | |
191 | ||
192 | AC_SUBST(config_path) | |
193 | AC_SUBST(XCFLAGS) | |
194 | AC_SUBST(XLDFLAGS) | |
195 | ||
196 | # Cleanup and exit. | |
197 | CFLAGS="$save_CFLAGS" | |
198 | AC_CACHE_SAVE | |
199 | ||
200 | if test ${multilib} = yes; then | |
201 | multilib_arg="--enable-multilib" | |
202 | else | |
203 | multilib_arg= | |
204 | fi | |
205 | ||
206 | # Set up the set of libraries that we need to link against for libgomp. | |
207 | # Note that the GOMP_SELF_SPEC in gcc.c will force -pthread for -fopenmp, | |
208 | # which will force linkage against -lpthread (or equivalent for the system). | |
209 | # That's not 100% ideal, but about the best we can do easily. | |
210 | if test $enable_shared = yes; then | |
211 | link_gomp="-lgomp %{static: $LIBS}" | |
212 | else | |
213 | link_gomp="-lgomp $LIBS" | |
214 | fi | |
215 | AC_SUBST(link_gomp) | |
216 | ||
217 | AM_CONDITIONAL([USE_FORTRAN], [test "$ac_cv_fc_compiler_gnu" = yes]) | |
218 | ||
219 | AC_CONFIG_FILES(Makefile testsuite/Makefile libgomp.spec) | |
220 | AC_OUTPUT |