[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)

AC_MSG_CHECKING([for --enable-linux-futex])
LIBGOMP_ENABLE(linux-futex, yes,
  [Use the Linux futex system call],
  permit yes|no)
AC_MSG_RESULT($enable_linux_futex)

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

# 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.
#  no-dependencies:  turns off auto dependency generation (just for now)
#  -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

# 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
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)

# 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,
	       [Define to 1 if you have the `clock_gettime' function.])])
fi

# See if we support thread-local storage.
LIBGOMP_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($enable_version_specific_runtime_libs)
	17
	18	AC_MSG_CHECKING([for --enable-linux-futex])
	19	LIBGOMP_ENABLE(linux-futex, yes,
	20	[Use the Linux futex system call],
	21	permit yes\|no)
	22	AC_MSG_RESULT($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
c41303c6 RH	125	AM_MAINTAINER_MODE
c41303c6 RH	126
953ff289 DN	127	# We need gfortran to compile parts of the library
	128	# We can't use AC_PROG_FC because it expects a fully working gfortran.
	129	#AC_PROG_FC(gfortran)
	130	FC="$GFORTRAN"
	131	AC_PROG_FC(gfortran)
	132	FCFLAGS="$FCFLAGS -Wall"
	133
	134	# For libtool versioning info, format is CURRENT:REVISION:AGE
	135	libtool_VERSION=1:0:0
	136	AC_SUBST(libtool_VERSION)
	137
	138	# Check header files.
	139	AC_STDC_HEADERS
	140	AC_HEADER_TIME
192a50ad	141	AC_CHECK_HEADERS(unistd.h semaphore.h sys/loadavg.h sys/time.h)
953ff289	142
18cbfd85 PB	143	GCC_HEADER_STDINT(gstdint.h)
18cbfd85 PB	144
953ff289	145	# Check to see if -pthread or -lpthread is needed. Prefer the former.
124452c9	146	# In case the pthread.h system header is not found, this test will fail.
953ff289 DN	147	XPCFLAGS=""
	148	CFLAGS="$CFLAGS -pthread"
	149	AC_LINK_IFELSE(
	150	[AC_LANG_PROGRAM(
	151	[#include <pthread.h>
	152	void g(void d) { return NULL; }],
	153	[pthread_t t; pthread_create(&t,NULL,g,NULL);])],
	154	[XPCFLAGS=" -Wc,-pthread"],
	155	[CFLAGS="$save_CFLAGS" LIBS="-lpthread $LIBS"
	156	AC_LINK_IFELSE(
	157	[AC_LANG_PROGRAM(
	158	[#include <pthread.h>
	159	void g(void d) { return NULL; }],
	160	[pthread_t t; pthread_create(&t,NULL,g,NULL);])],
	161	[],
	162	[AC_MSG_ERROR([Pthreads are required to build libgomp])])])
	163
	164	# Check for functions needed.
	165	AC_CHECK_FUNCS(getloadavg clock_gettime)
	166
	167	# At least for glibc, clock_gettime is in librt. But don't pull that
	168	# in if it still doesn't give us the function we want.
	169	if test $ac_cv_func_clock_gettime = no; then
	170	AC_CHECK_LIB(rt, clock_gettime,
	171	[LIBS="-lrt $LIBS"
	172	AC_DEFINE(HAVE_CLOCK_GETTIME,
	173	[Define to 1 if you have the `clock_gettime' function.])])
	174	fi
	175
	176	# See if we support thread-local storage.
	177	LIBGOMP_CHECK_TLS
	178
	179	# See what sort of export controls are availible.
	180	LIBGOMP_CHECK_ATTRIBUTE_VISIBILITY
	181	LIBGOMP_CHECK_ATTRIBUTE_DLLEXPORT
	182	LIBGOMP_CHECK_ATTRIBUTE_ALIAS
	183	LIBGOMP_ENABLE_SYMVERS
	184
	185	# Get target configury.
	186	. ${srcdir}/configure.tgt
	187	CFLAGS="$save_CFLAGS $XCFLAGS"
	188
	189	# Check for __sync_val_compare_and_swap, but only after the target has
	190	# had a chance to set XCFLAGS.
	191	LIBGOMP_CHECK_SYNC_BUILTINS
	192
	193	XCFLAGS="$XCFLAGS$XPCFLAGS"
	194
	195	AC_SUBST(config_path)
	196	AC_SUBST(XCFLAGS)
	197	AC_SUBST(XLDFLAGS)
	198
	199	# Cleanup and exit.
	200	CFLAGS="$save_CFLAGS"
	201	AC_CACHE_SAVE
	202
	203	if test ${multilib} = yes; then
	204	multilib_arg="--enable-multilib"
	205	else
	206	multilib_arg=
	207	fi
	208
	209	# Set up the set of libraries that we need to link against for libgomp.
192a50ad	210	# Note that the GOMP_SELF_SPEC in gcc.c will force -pthread for -fopenmp,
953ff289 DN	211	# which will force linkage against -lpthread (or equivalent for the system).
	212	# That's not 100% ideal, but about the best we can do easily.
	213	if test $enable_shared = yes; then
	214	link_gomp="-lgomp %{static: $LIBS}"
	215	else
	216	link_gomp="-lgomp $LIBS"
	217	fi
	218	AC_SUBST(link_gomp)
	219
	220	AM_CONDITIONAL([USE_FORTRAN], [test "$ac_cv_fc_compiler_gnu" = yes])
	221
03b8fe49 PB	222	# ??? 2006-01-24: Paulo committed to asking autoconf folk to document
	223	# and export AC_COMPUTE_INT. If that happens, then we'll need to remove
	224	# the underscore here and update the PREREQ. If it doesn't, then we'll
	225	# need to copy this macro to our acinclude.m4.
	226	save_CFLAGS="$CFLAGS"
	227	for i in $config_path; do
	228	if test -f $srcdir/config/$i/omp-lock.h; then
	229	CFLAGS="$CFLAGS -include $srcdir/config/$i/omp-lock.h"
	230	break
	231	fi
	232	done
	233
	234	_AC_COMPUTE_INT([sizeof (omp_lock_t)], [OMP_LOCK_SIZE],,
	235	[AC_MSG_ERROR([unsupported system, cannot find sizeof (omp_lock_t)])])
	236	_AC_COMPUTE_INT([__alignof (omp_lock_t)], [OMP_LOCK_ALIGN])
	237	_AC_COMPUTE_INT([sizeof (omp_nest_lock_t)], [OMP_NEST_LOCK_SIZE])
	238	_AC_COMPUTE_INT([__alignof (omp_nest_lock_t)], [OMP_NEST_LOCK_ALIGN])
	239
	240	# If the lock fits in an integer, then arrange for Fortran to use that
	241	# integer. If it doesn't, then arrange for Fortran to use a pointer.
	242	# Except that we don't have a way at present to multi-lib the installed
	243	# Fortran modules, so we assume 8 bytes for pointers, regardless of the
	244	# actual target.
	245	OMP_LOCK_KIND=$OMP_LOCK_SIZE
	246	OMP_NEST_LOCK_KIND=$OMP_NEST_LOCK_SIZE
	247	if test $OMP_LOCK_SIZE -gt 8 \|\| test $OMP_LOCK_ALIGN -gt $OMP_LOCK_SIZE; then
	248	OMP_LOCK_KIND=8
	249	fi
	250	if test $OMP_NEST_LOCK_SIZE -gt 8 \|\| test $OMP_NEST_LOCK_ALIGN -gt $OMP_NEST_LOCK_SIZE; then
	251	OMP_NEST_LOCK_KIND=8
	252	fi
	253
	254	AC_SUBST(OMP_LOCK_SIZE)
	255	AC_SUBST(OMP_LOCK_ALIGN)
	256	AC_SUBST(OMP_NEST_LOCK_SIZE)
	257	AC_SUBST(OMP_NEST_LOCK_ALIGN)
	258	AC_SUBST(OMP_LOCK_KIND)
	259	AC_SUBST(OMP_NEST_LOCK_KIND)
	260	CFLAGS="$save_CFLAGS"
	261
	262	AC_CONFIG_FILES(omp.h omp_lib.h omp_lib.f90 libgomp_f.h)
953ff289 DN	263	AC_CONFIG_FILES(Makefile testsuite/Makefile libgomp.spec)
953ff289 DN	264	AC_OUTPUT