[thirdparty/gcc.git] / libgomp / configure.ac

# Process this file with autoconf to produce a configure script, like so:
# aclocal -I ../config && autoconf && autoheader && automake

AC_PREREQ(2.59)
AC_INIT([GNU OpenMP Runtime Library], 1.0,,[libgomp])
AC_CONFIG_HEADER(config.h)

# -------
# Options
# -------

AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
LIBGOMP_ENABLE(version-specific-runtime-libs, no, ,
   [Specify that runtime libraries should be installed in a compiler-specific directory],
   permit yes|no)
AC_MSG_RESULT($enable_version_specific_runtime_libs)

# We would like our source tree to be readonly. However when releases or
# pre-releases are generated, the flex/bison generated files as well as the
# various formats of manuals need to be included along with the rest of the
# sources.  Therefore we have --enable-generated-files-in-srcdir to do 
# just that.
AC_MSG_CHECKING([for --enable-generated-files-in-srcdir])
LIBGOMP_ENABLE(generated-files-in-srcdir, no, ,
   [put copies of generated files in source dir intended for creating source 
    tarballs for users without texinfo bison or flex.],
   permit yes|no)
AC_MSG_RESULT($enable_generated_files_in_srcdir)
AM_CONDITIONAL(GENINSRC, test "$enable_generated_files_in_srcdir" = yes)


# -------
# -------

# Gets build, host, target, *_vendor, *_cpu, *_os, etc.
#
# You will slowly go insane if you do not grok the following fact:  when
# building this library, the top-level /target/ becomes the library's /host/.
#
# configure then causes --target to default to --host, exactly like any
# other package using autoconf.  Therefore, 'target' and 'host' will
# always be the same.  This makes sense both for native and cross compilers
# just think about it for a little while.  :-)
#
# Also, if this library is being configured as part of a cross compiler, the
# top-level configure script will pass the "real" host as $with_cross_host.
#
# Do not delete or change the following two lines.  For why, see
# http://gcc.gnu.org/ml/libstdc++/2003-07/msg00451.html
AC_CANONICAL_SYSTEM
target_alias=${target_alias-$host_alias}

# Sets up automake.  Must come after AC_CANONICAL_SYSTEM.  Each of the
# following is magically included in AUTOMAKE_OPTIONS in each Makefile.am.
#  1.9.0:  minimum required version
#  no-define:  PACKAGE and VERSION will not be #define'd in config.h (a bunch
#              of other PACKAGE_* variables will, however, and there's nothing
#              we can do about that; they come from AC_INIT).
#  foreign:  we don't follow the normal rules for GNU packages (no COPYING
#            file in the top srcdir, etc, etc), so stop complaining.
#  -Wall:  turns on all automake warnings...
#  -Wno-portability:  ...except this one, since GNU make is required.
#  -Wno-override: ... and this one, since we do want this in testsuite.
AM_INIT_AUTOMAKE([1.9.0 foreign -Wall -Wno-portability -Wno-override])
AM_ENABLE_MULTILIB(, ..)

# Calculate toolexeclibdir
# Also toolexecdir, though it's only used in toolexeclibdir
case ${enable_version_specific_runtime_libs} in
  yes)
    # Need the gcc compiler version to know where to install libraries
    # and header files if --enable-version-specific-runtime-libs option
    # is selected.
    toolexecdir='$(libdir)/gcc/$(target_alias)'
    toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)'
    ;;
  no)
    if test -n "$with_cross_host" &&
       test x"$with_cross_host" != x"no"; then
      # Install a library built with a cross compiler in tooldir, not libdir.
      toolexecdir='$(exec_prefix)/$(target_alias)'
      toolexeclibdir='$(toolexecdir)/lib'
    else
      toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
      toolexeclibdir='$(libdir)'
    fi
    multi_os_directory=`$CC -print-multi-os-directory`
    case $multi_os_directory in
      .) ;; # Avoid trailing /.
      *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
    esac
    ;;
esac
AC_SUBST(toolexecdir)
AC_SUBST(toolexeclibdir)

# Check the compiler.
# The same as in boehm-gc and libstdc++. Have to borrow it from there.
# We must force CC to /not/ be precious variables; otherwise
# the wrong, non-multilib-adjusted value will be used in multilibs.
# As a side effect, we have to subst CFLAGS ourselves.

m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
m4_define([_AC_ARG_VAR_PRECIOUS],[])
AC_PROG_CC
m4_rename([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])

AC_SUBST(CFLAGS)

# In order to override CFLAGS_FOR_TARGET, all of our special flags go
# in XCFLAGS.  But we need them in CFLAGS during configury.  So put them
# in both places for now and restore CFLAGS at the end of config.
save_CFLAGS="$CFLAGS"

# Add -Wall -Werror if we are using GCC.
if test "x$GCC" = "xyes"; then
  XCFLAGS="$XCFLAGS -Wall -Werror"
fi

# Find other programs we need.
AC_CHECK_TOOL(AR, ar)
AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error)
AC_PATH_PROG(PERL, perl, perl-not-found-in-path-error)
AC_PROG_MAKE_SET
AC_PROG_INSTALL

# See if makeinfo has been installed and is modern enough
# that we can use it.
ACX_CHECK_PROG_VER([MAKEINFO], [makeinfo], [--version],
                   [GNU texinfo.* \([0-9][0-9.]*\)],
                   [4.[4-9]*|4.[1-9][0-9]*|[5-9]*|[1-9][0-9]*])
AM_CONDITIONAL(BUILD_INFO, test $gcc_cv_prog_makeinfo_modern = "yes")


# Configure libtool
AM_PROG_LIBTOOL
AC_SUBST(enable_shared)
AC_SUBST(enable_static)

AM_MAINTAINER_MODE

# We need gfortran to compile parts of the library
# We can't use AC_PROG_FC because it expects a fully working gfortran.
#AC_PROG_FC(gfortran)
FC="$GFORTRAN"
AC_PROG_FC(gfortran)
FCFLAGS="$FCFLAGS -Wall"

# For libtool versioning info, format is CURRENT:REVISION:AGE
libtool_VERSION=1:0:0
AC_SUBST(libtool_VERSION)

# Check header files.
AC_STDC_HEADERS
AC_HEADER_TIME
ACX_HEADER_STRING
AC_CHECK_HEADERS(unistd.h semaphore.h sys/loadavg.h sys/time.h)

GCC_HEADER_STDINT(gstdint.h)

# Check to see if -pthread or -lpthread is needed.  Prefer the former.
# In case the pthread.h system header is not found, this test will fail.
XPCFLAGS=""
CFLAGS="$CFLAGS -pthread"
AC_LINK_IFELSE(
 [AC_LANG_PROGRAM(
  [#include <pthread.h>
   void *g(void *d) { return NULL; }],
  [pthread_t t; pthread_create(&t,NULL,g,NULL);])],
 [XPCFLAGS=" -Wc,-pthread"],
 [CFLAGS="$save_CFLAGS" LIBS="-lpthread $LIBS"
  AC_LINK_IFELSE(
   [AC_LANG_PROGRAM(
    [#include <pthread.h>
     void *g(void *d) { return NULL; }],
    [pthread_t t; pthread_create(&t,NULL,g,NULL);])],
   [],
   [AC_MSG_ERROR([Pthreads are required to build libgomp])])])

# Check for functions needed.
AC_CHECK_FUNCS(getloadavg clock_gettime)

# Check for broken semaphore implementation on darwin.
# sem_init returns: sem_init error: Function not implemented.
case "$host" in
  *-darwin*)
    AC_DEFINE(HAVE_BROKEN_POSIX_SEMAPHORES, 1,
	Define if the POSIX Semaphores do not work on your system.)
    ;;
esac

GCC_LINUX_FUTEX(:)

# Check for pthread_{,attr_}[sg]etaffinity_np.
AC_LINK_IFELSE(
 [AC_LANG_PROGRAM(
  [#define _GNU_SOURCE
   #include <pthread.h>],
  [cpu_set_t cpuset;
   pthread_attr_t attr;
   pthread_getaffinity_np (pthread_self (), sizeof (cpu_set_t), &cpuset);
   if (CPU_ISSET (0, &cpuset))
     CPU_SET (1, &cpuset);
   else
     CPU_ZERO (&cpuset);
   pthread_setaffinity_np (pthread_self (), sizeof (cpu_set_t), &cpuset);
   pthread_attr_init (&attr);
   pthread_attr_getaffinity_np (&attr, sizeof (cpu_set_t), &cpuset);
   pthread_attr_setaffinity_np (&attr, sizeof (cpu_set_t), &cpuset);])],
  AC_DEFINE(HAVE_PTHREAD_AFFINITY_NP, 1,
[	Define if pthread_{,attr_}{g,s}etaffinity_np is supported.]))

# At least for glibc, clock_gettime is in librt.  But don't pull that
# in if it still doesn't give us the function we want.
if test $ac_cv_func_clock_gettime = no; then
  AC_CHECK_LIB(rt, clock_gettime,
    [LIBS="-lrt $LIBS"
     AC_DEFINE(HAVE_CLOCK_GETTIME, 1,
	       [Define to 1 if you have the `clock_gettime' function.])])
fi

# See if we support thread-local storage.
GCC_CHECK_TLS

# See what sort of export controls are availible.
LIBGOMP_CHECK_ATTRIBUTE_VISIBILITY
LIBGOMP_CHECK_ATTRIBUTE_DLLEXPORT
LIBGOMP_CHECK_ATTRIBUTE_ALIAS
LIBGOMP_ENABLE_SYMVERS

# Get target configury.
. ${srcdir}/configure.tgt
CFLAGS="$save_CFLAGS $XCFLAGS"

# Check for __sync_val_compare_and_swap, but only after the target has
# had a chance to set XCFLAGS.
LIBGOMP_CHECK_SYNC_BUILTINS

XCFLAGS="$XCFLAGS$XPCFLAGS"

AC_SUBST(config_path)
AC_SUBST(XCFLAGS)
AC_SUBST(XLDFLAGS)

# Cleanup and exit.
CFLAGS="$save_CFLAGS"
AC_CACHE_SAVE

if test ${multilib} = yes; then
  multilib_arg="--enable-multilib"
else
  multilib_arg=
fi

# Set up the set of libraries that we need to link against for libgomp.
# Note that the GOMP_SELF_SPEC in gcc.c will force -pthread for -fopenmp,
# which will force linkage against -lpthread (or equivalent for the system).
# That's not 100% ideal, but about the best we can do easily.
if test $enable_shared = yes; then
  link_gomp="-lgomp %{static: $LIBS}"
else
  link_gomp="-lgomp $LIBS"
fi
AC_SUBST(link_gomp)

AM_CONDITIONAL([USE_FORTRAN], [test "$ac_cv_fc_compiler_gnu" = yes])

# ??? 2006-01-24: Paulo committed to asking autoconf folk to document
# and export AC_COMPUTE_INT.  If that happens, then we'll need to remove
# the underscore here and update the PREREQ.  If it doesn't, then we'll
# need to copy this macro to our acinclude.m4.
save_CFLAGS="$CFLAGS"
for i in $config_path; do
  if test -f $srcdir/config/$i/omp-lock.h; then
    CFLAGS="$CFLAGS -include $srcdir/config/$i/omp-lock.h"
    break
  fi
done

_AC_COMPUTE_INT([sizeof (omp_lock_t)], [OMP_LOCK_SIZE],,
  [AC_MSG_ERROR([unsupported system, cannot find sizeof (omp_lock_t)])])
_AC_COMPUTE_INT([__alignof (omp_lock_t)], [OMP_LOCK_ALIGN])
_AC_COMPUTE_INT([sizeof (omp_nest_lock_t)], [OMP_NEST_LOCK_SIZE])
_AC_COMPUTE_INT([__alignof (omp_nest_lock_t)], [OMP_NEST_LOCK_ALIGN])

# If the lock fits in an integer, then arrange for Fortran to use that
# integer.  If it doesn't, then arrange for Fortran to use a pointer.
# Except that we don't have a way at present to multi-lib the installed
# Fortran modules, so we assume 8 bytes for pointers, regardless of the
# actual target.
OMP_LOCK_KIND=$OMP_LOCK_SIZE
OMP_NEST_LOCK_KIND=$OMP_NEST_LOCK_SIZE
if test $OMP_LOCK_SIZE -gt 8 || test $OMP_LOCK_ALIGN -gt $OMP_LOCK_SIZE; then
  OMP_LOCK_KIND=8
fi
if test $OMP_NEST_LOCK_SIZE -gt 8 || test $OMP_NEST_LOCK_ALIGN -gt $OMP_NEST_LOCK_SIZE; then
  OMP_NEST_LOCK_KIND=8
fi

AC_SUBST(OMP_LOCK_SIZE)
AC_SUBST(OMP_LOCK_ALIGN)
AC_SUBST(OMP_NEST_LOCK_SIZE)
AC_SUBST(OMP_NEST_LOCK_ALIGN)
AC_SUBST(OMP_LOCK_KIND)
AC_SUBST(OMP_NEST_LOCK_KIND)
CFLAGS="$save_CFLAGS"

AC_CONFIG_FILES(omp.h omp_lib.h omp_lib.f90 libgomp_f.h)
AC_CONFIG_FILES(Makefile testsuite/Makefile libgomp.spec)
AC_OUTPUT
Commit	Line	Data
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($enable_version_specific_runtime_libs)
	17
3721b9e1 DF	18	# We would like our source tree to be readonly. However when releases or
	19	# pre-releases are generated, the flex/bison generated files as well as the
	20	# various formats of manuals need to be included along with the rest of the
	21	# sources. Therefore we have --enable-generated-files-in-srcdir to do
	22	# just that.
	23	AC_MSG_CHECKING([for --enable-generated-files-in-srcdir])
	24	LIBGOMP_ENABLE(generated-files-in-srcdir, no, ,
	25	[put copies of generated files in source dir intended for creating source
	26	tarballs for users without texinfo bison or flex.],
	27	permit yes\|no)
	28	AC_MSG_RESULT($enable_generated_files_in_srcdir)
	29	AM_CONDITIONAL(GENINSRC, test "$enable_generated_files_in_srcdir" = yes)
	30
	31
953ff289 DN	32	# -------
	33	# -------
	34
	35	# Gets build, host, target, _vendor, _cpu, *_os, etc.
	36	#
	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/.
	39	#
	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. :-)
	44	#
	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 $with_cross_host.
	47	#
	48	# Do not delete or change the following two lines. For why, see
	49	# http://gcc.gnu.org/ml/libstdc++/2003-07/msg00451.html
	50	AC_CANONICAL_SYSTEM
	51	target_alias=${target_alias-$host_alias}
	52
	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.
953ff289 DN	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(, ..)
	66
	67	# Calculate toolexeclibdir
	68	# Also toolexecdir, though it's only used in toolexeclibdir
	69	case ${enable_version_specific_runtime_libs} in
	70	yes)
	71	# Need the gcc compiler version to know where to install libraries
	72	# and header files if --enable-version-specific-runtime-libs option
	73	# is selected.
	74	toolexecdir='$(libdir)/gcc/$(target_alias)'
	75	toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)'
	76	;;
	77	no)
	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='$(toolexecdir)/lib'
	83	else
	84	toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
	85	toolexeclibdir='$(libdir)'
	86	fi
	87	multi_os_directory=`$CC -print-multi-os-directory`
	88	case $multi_os_directory in
	89	.) ;; # Avoid trailing /.
	90	*) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
	91	esac
	92	;;
	93	esac
	94	AC_SUBST(toolexecdir)
	95	AC_SUBST(toolexeclibdir)
	96
	97	# Check the compiler.
	98	# The same as in boehm-gc and libstdc++. Have to borrow it from there.
	99	# We must force CC to /not/ be precious variables; otherwise
	100	# the wrong, non-multilib-adjusted value will be used in multilibs.
	101	# As a side effect, we have to subst CFLAGS ourselves.
	102
	103	m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
	104	m4_define([_AC_ARG_VAR_PRECIOUS],[])
	105	AC_PROG_CC
	106	m4_rename([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
	107
	108	AC_SUBST(CFLAGS)
	109
	110	# In order to override CFLAGS_FOR_TARGET, all of our special flags go
	111	# in XCFLAGS. But we need them in CFLAGS during configury. So put them
	112	# in both places for now and restore CFLAGS at the end of config.
	113	save_CFLAGS="$CFLAGS"
	114
	115	# Add -Wall -Werror if we are using GCC.
	116	if test "x$GCC" = "xyes"; then
	117	XCFLAGS="$XCFLAGS -Wall -Werror"
	118	fi
	119
	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)
	124	AC_PROG_MAKE_SET
125	AC_PROG_INSTALL
126
748b9d7c DF	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.* \([0-9][0-9.]*\)],
a7415017	131	[4.[4-9]\|4.[1-9][0-9]\|[5-9]\|[1-9][0-9]])
748b9d7c DF	132	AM_CONDITIONAL(BUILD_INFO, test $gcc_cv_prog_makeinfo_modern = "yes")
	133
	134
953ff289 DN	135	# Configure libtool
	136	AM_PROG_LIBTOOL
	137	AC_SUBST(enable_shared)
	138	AC_SUBST(enable_static)
	139
c41303c6 RH	140	AM_MAINTAINER_MODE
c41303c6 RH	141
953ff289 DN	142	# We need gfortran to compile parts of the library
	143	# We can't use AC_PROG_FC because it expects a fully working gfortran.
	144	#AC_PROG_FC(gfortran)
	145	FC="$GFORTRAN"
	146	AC_PROG_FC(gfortran)
	147	FCFLAGS="$FCFLAGS -Wall"
	148
	149	# For libtool versioning info, format is CURRENT:REVISION:AGE
	150	libtool_VERSION=1:0:0
	151	AC_SUBST(libtool_VERSION)
	152
	153	# Check header files.
	154	AC_STDC_HEADERS
	155	AC_HEADER_TIME
a1b25e49	156	ACX_HEADER_STRING
192a50ad	157	AC_CHECK_HEADERS(unistd.h semaphore.h sys/loadavg.h sys/time.h)
953ff289	158
18cbfd85 PB	159	GCC_HEADER_STDINT(gstdint.h)
18cbfd85 PB	160
953ff289	161	# Check to see if -pthread or -lpthread is needed. Prefer the former.
124452c9	162	# In case the pthread.h system header is not found, this test will fail.
953ff289	163	XPCFLAGS=""
60def7ed	164	CFLAGS="$CFLAGS -pthread"
953ff289 DN	165	AC_LINK_IFELSE(
	166	[AC_LANG_PROGRAM(
	167	[#include <pthread.h>
	168	void g(void d) { return NULL; }],
	169	[pthread_t t; pthread_create(&t,NULL,g,NULL);])],
60def7ed	170	[XPCFLAGS=" -Wc,-pthread"],
953ff289 DN	171	[CFLAGS="$save_CFLAGS" LIBS="-lpthread $LIBS"
	172	AC_LINK_IFELSE(
	173	[AC_LANG_PROGRAM(
	174	[#include <pthread.h>
	175	void g(void d) { return NULL; }],
	176	[pthread_t t; pthread_create(&t,NULL,g,NULL);])],
	177	[],
	178	[AC_MSG_ERROR([Pthreads are required to build libgomp])])])
	179
	180	# Check for functions needed.
	181	AC_CHECK_FUNCS(getloadavg clock_gettime)
	182
d349482e AT	183	# Check for broken semaphore implementation on darwin.
	184	# sem_init returns: sem_init error: Function not implemented.
	185	case "$host" in
	186	-darwin)
	187	AC_DEFINE(HAVE_BROKEN_POSIX_SEMAPHORES, 1,
	188	Define if the POSIX Semaphores do not work on your system.)
	189	;;
	190	esac
	191
0f3e711e JJ	192	GCC_LINUX_FUTEX(:)
0f3e711e JJ	193
a0884cf0 JJ	194	# Check for pthread_{,attr_}[sg]etaffinity_np.
	195	AC_LINK_IFELSE(
	196	[AC_LANG_PROGRAM(
	197	[#define _GNU_SOURCE
	198	#include <pthread.h>],
	199	[cpu_set_t cpuset;
	200	pthread_attr_t attr;
	201	pthread_getaffinity_np (pthread_self (), sizeof (cpu_set_t), &cpuset);
	202	if (CPU_ISSET (0, &cpuset))
	203	CPU_SET (1, &cpuset);
	204	else
	205	CPU_ZERO (&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.]))
	212
953ff289 DN	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,
	217	[LIBS="-lrt $LIBS"
c663e301	218	AC_DEFINE(HAVE_CLOCK_GETTIME, 1,
953ff289 DN	219	[Define to 1 if you have the `clock_gettime' function.])])
	220	fi
	221
	222	# See if we support thread-local storage.
60e1758f	223	GCC_CHECK_TLS
953ff289 DN	224
	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
	230
	231	# Get target configury.
	232	. ${srcdir}/configure.tgt
	233	CFLAGS="$save_CFLAGS $XCFLAGS"
	234
	235	# Check for __sync_val_compare_and_swap, but only after the target has
	236	# had a chance to set XCFLAGS.
	237	LIBGOMP_CHECK_SYNC_BUILTINS
	238
	239	XCFLAGS="$XCFLAGS$XPCFLAGS"
	240
	241	AC_SUBST(config_path)
	242	AC_SUBST(XCFLAGS)
	243	AC_SUBST(XLDFLAGS)
	244
	245	# Cleanup and exit.
	246	CFLAGS="$save_CFLAGS"
	247	AC_CACHE_SAVE
	248
	249	if test ${multilib} = yes; then
	250	multilib_arg="--enable-multilib"
	251	else
	252	multilib_arg=
	253	fi
	254
	255	# Set up the set of libraries that we need to link against for libgomp.
192a50ad	256	# Note that the GOMP_SELF_SPEC in gcc.c will force -pthread for -fopenmp,
953ff289 DN	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}"
	261	else
	262	link_gomp="-lgomp $LIBS"
	263	fi
	264	AC_SUBST(link_gomp)
	265
	266	AM_CONDITIONAL([USE_FORTRAN], [test "$ac_cv_fc_compiler_gnu" = yes])
	267
03b8fe49 PB	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"
	276	break
	277	fi
	278	done
	279
	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])
	285
	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
	290	# actual target.
	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
	294	OMP_LOCK_KIND=8
	295	fi
	296	if test $OMP_NEST_LOCK_SIZE -gt 8 \|\| test $OMP_NEST_LOCK_ALIGN -gt $OMP_NEST_LOCK_SIZE; then
	297	OMP_NEST_LOCK_KIND=8
	298	fi
	299
	300	AC_SUBST(OMP_LOCK_SIZE)
	301	AC_SUBST(OMP_LOCK_ALIGN)
	302	AC_SUBST(OMP_NEST_LOCK_SIZE)
	303	AC_SUBST(OMP_NEST_LOCK_ALIGN)
	304	AC_SUBST(OMP_LOCK_KIND)
	305	AC_SUBST(OMP_NEST_LOCK_KIND)
	306	CFLAGS="$save_CFLAGS"
	307
	308	AC_CONFIG_FILES(omp.h omp_lib.h omp_lib.f90 libgomp_f.h)
953ff289 DN	309	AC_CONFIG_FILES(Makefile testsuite/Makefile libgomp.spec)
953ff289 DN	310	AC_OUTPUT