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($enable_version_specific_runtime_libs)
18 AC_MSG_CHECKING([for --enable-linux-futex])
19 LIBGOMP_ENABLE(linux-futex, yes,
20 [Use the Linux futex system call],
22 AC_MSG_RESULT($enable_linux_futex)
27 # Gets build, host, target, *_vendor, *_cpu, *_os, etc.
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/.
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. :-)
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 $with_cross_host.
40 # Do not delete or change the following two lines. For why, see
41 # http://gcc.gnu.org/ml/libstdc++/2003-07/msg00451.html
43 target_alias=${target_alias-$host_alias}
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(, ..)
60 # Calculate toolexeclibdir
61 # Also toolexecdir, though it's only used in toolexeclibdir
62 case ${enable_version_specific_runtime_libs} in
64 # Need the gcc compiler version to know where to install libraries
65 # and header files if --enable-version-specific-runtime-libs option
67 toolexecdir='$(libdir)/gcc/$(target_alias)'
68 toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)'
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='$(toolexecdir)/lib'
77 toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
78 toolexeclibdir='$(libdir)'
80 multi_os_directory=`$CC -print-multi-os-directory`
81 case $multi_os_directory in
82 .) ;; # Avoid trailing /.
83 *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
88 AC_SUBST(toolexeclibdir)
91 # The same as in boehm-gc and libstdc++. Have to borrow it from there.
92 # We must force CC to /not/ be precious variables; otherwise
93 # the wrong, non-multilib-adjusted value will be used in multilibs.
94 # As a side effect, we have to subst CFLAGS ourselves.
96 m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
97 m4_define([_AC_ARG_VAR_PRECIOUS],[])
99 m4_rename([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
103 # In order to override CFLAGS_FOR_TARGET, all of our special flags go
104 # in XCFLAGS. But we need them in CFLAGS during configury. So put them
105 # in both places for now and restore CFLAGS at the end of config.
106 save_CFLAGS="$CFLAGS"
108 # Add -Wall -Werror if we are using GCC.
109 if test "x$GCC" = "xyes"; then
110 XCFLAGS="$XCFLAGS -Wall -Werror"
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)
122 AC_SUBST(enable_shared)
123 AC_SUBST(enable_static)
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)
130 FCFLAGS="$FCFLAGS -Wall"
132 # For libtool versioning info, format is CURRENT:REVISION:AGE
133 libtool_VERSION=1:0:0
134 AC_SUBST(libtool_VERSION)
136 # Check header files.
139 AC_CHECK_HEADERS(unistd.h semaphore.h sys/time.h)
140 AC_CHECK_HEADER([pthread.h],[],
141 [AC_MSG_ERROR([Pthreads are required to build libgomp])])
143 # Check to see if -pthread or -lpthread is needed. Prefer the former.
145 CFLAGS="$CFLAGS -pthread"
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"
155 [#include <pthread.h>
156 void *g(void *d) { return NULL; }],
157 [pthread_t t; pthread_create(&t,NULL,g,NULL);])],
159 [AC_MSG_ERROR([Pthreads are required to build libgomp])])])
161 # Check for functions needed.
162 AC_CHECK_FUNCS(getloadavg clock_gettime)
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,
169 AC_DEFINE(HAVE_CLOCK_GETTIME,
170 [Define to 1 if you have the `clock_gettime' function.])])
173 # See if we support thread-local storage.
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
182 # Get target configury.
183 . ${srcdir}/configure.tgt
184 CFLAGS="$save_CFLAGS $XCFLAGS"
186 # Check for __sync_val_compare_and_swap, but only after the target has
187 # had a chance to set XCFLAGS.
188 LIBGOMP_CHECK_SYNC_BUILTINS
190 XCFLAGS="$XCFLAGS$XPCFLAGS"
192 AC_SUBST(config_path)
197 CFLAGS="$save_CFLAGS"
200 if test ${multilib} = yes; then
201 multilib_arg="--enable-multilib"
206 AM_CONDITIONAL([USE_FORTRAN], [test "$ac_cv_fc_compiler_gnu" = yes])
208 AC_CONFIG_FILES(Makefile testsuite/Makefile)