1# Process this file with autoconf to produce a configure script, like so: 2# aclocal -I ../config && autoconf && autoheader && automake 3 4AC_PREREQ(2.59) 5AC_INIT([GNU OpenMP Runtime Library], 1.0,,[libgomp]) 6AC_CONFIG_HEADER(config.h) 7 8# ------- 9# Options 10# ------- 11 12AC_MSG_CHECKING([for --enable-version-specific-runtime-libs]) 13LIBGOMP_ENABLE(version-specific-runtime-libs, no, , 14 [Specify that runtime libraries should be installed in a compiler-specific directory], 15 permit yes|no) 16AC_MSG_RESULT($enable_version_specific_runtime_libs) 17 18# We would like our source tree to be readonly. However when releases or 19# pre-releases are generated, the flex/bison generated files as well as the 20# various formats of manuals need to be included along with the rest of the 21# sources. Therefore we have --enable-generated-files-in-srcdir to do 22# just that. 23AC_MSG_CHECKING([for --enable-generated-files-in-srcdir]) 24LIBGOMP_ENABLE(generated-files-in-srcdir, no, , 25 [put copies of generated files in source dir intended for creating source 26 tarballs for users without texinfo bison or flex.], 27 permit yes|no) 28AC_MSG_RESULT($enable_generated_files_in_srcdir) 29AM_CONDITIONAL(GENINSRC, test "$enable_generated_files_in_srcdir" = yes) 30 31 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 $with_cross_host. 47# 48# Do not delete or change the following two lines. For why, see 49# http://gcc.gnu.org/ml/libstdc++/2003-07/msg00451.html 50AC_CANONICAL_SYSTEM 51target_alias=${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. 61# no-dist: we don't want 'dist' and related rules. 62# -Wall: turns on all automake warnings... 63# -Wno-portability: ...except this one, since GNU make is required. 64# -Wno-override: ... and this one, since we do want this in testsuite. 65AM_INIT_AUTOMAKE([1.9.0 foreign no-dist -Wall -Wno-portability -Wno-override]) 66AM_ENABLE_MULTILIB(, ..) 67 68# Calculate toolexeclibdir 69# Also toolexecdir, though it's only used in toolexeclibdir 70case ${enable_version_specific_runtime_libs} in 71 yes) 72 # Need the gcc compiler version to know where to install libraries 73 # and header files if --enable-version-specific-runtime-libs option 74 # is selected. 75 toolexecdir='$(libdir)/gcc/$(target_alias)' 76 toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)' 77 ;; 78 no) 79 if test -n "$with_cross_host" && 80 test x"$with_cross_host" != x"no"; then 81 # Install a library built with a cross compiler in tooldir, not libdir. 82 toolexecdir='$(exec_prefix)/$(target_alias)' 83 toolexeclibdir='$(toolexecdir)/lib' 84 else 85 toolexecdir='$(libdir)/gcc-lib/$(target_alias)' 86 toolexeclibdir='$(libdir)' 87 fi 88 multi_os_directory=`$CC -print-multi-os-directory` 89 case $multi_os_directory in 90 .) ;; # Avoid trailing /. 91 *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;; 92 esac 93 ;; 94esac 95AC_SUBST(toolexecdir) 96AC_SUBST(toolexeclibdir) 97 98# Check the compiler. 99# The same as in boehm-gc and libstdc++. Have to borrow it from there. 100# We must force CC to /not/ be precious variables; otherwise 101# the wrong, non-multilib-adjusted value will be used in multilibs. 102# As a side effect, we have to subst CFLAGS ourselves. 103 104m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS]) 105m4_define([_AC_ARG_VAR_PRECIOUS],[]) 106AC_PROG_CC 107m4_rename([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS]) 108 109AC_SUBST(CFLAGS) 110 111# In order to override CFLAGS_FOR_TARGET, all of our special flags go 112# in XCFLAGS. But we need them in CFLAGS during configury. So put them 113# in both places for now and restore CFLAGS at the end of config. 114save_CFLAGS="$CFLAGS" 115 116# Add -Wall -Werror if we are using GCC. 117if test "x$GCC" = "xyes"; then 118 XCFLAGS="$XCFLAGS -Wall -Werror" 119fi 120 121# Find other programs we need. 122AC_CHECK_TOOL(AR, ar) 123AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error) 124AC_PATH_PROG(PERL, perl, perl-not-found-in-path-error) 125AC_PROG_MAKE_SET 126AC_PROG_INSTALL 127 128# See if makeinfo has been installed and is modern enough 129# that we can use it. 130ACX_CHECK_PROG_VER([MAKEINFO], [makeinfo], [--version], 131 [GNU texinfo.* \([0-9][0-9.]*\)], 132 [4.[4-9]*|4.[1-9][0-9]*|[5-9]*|[1-9][0-9]*]) 133AM_CONDITIONAL(BUILD_INFO, test $gcc_cv_prog_makeinfo_modern = "yes") 134 135 136# Configure libtool 137AM_PROG_LIBTOOL 138AC_SUBST(enable_shared) 139AC_SUBST(enable_static) 140 141AM_MAINTAINER_MODE 142 143# We need gfortran to compile parts of the library 144# We can't use AC_PROG_FC because it expects a fully working gfortran. 145#AC_PROG_FC(gfortran) 146FC="$GFORTRAN" 147AC_PROG_FC(gfortran) 148FCFLAGS="$FCFLAGS -Wall" 149 150# For libtool versioning info, format is CURRENT:REVISION:AGE 151libtool_VERSION=1:0:0 152AC_SUBST(libtool_VERSION) 153 154# Check header files. 155AC_STDC_HEADERS 156AC_HEADER_TIME 157AC_CHECK_HEADERS(unistd.h semaphore.h sys/loadavg.h sys/sysctl.h sys/time.h) 158 159GCC_HEADER_STDINT(gstdint.h) 160 161# Check to see if -pthread or -lpthread is needed. Prefer the former. 162# In case the pthread.h system header is not found, this test will fail. 163XPCFLAGS="" 164CFLAGS="$CFLAGS -pthread" 165AC_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);])], 170 [XPCFLAGS=" -Wc,-pthread"], 171 [CFLAGS="$save_CFLAGS" LIBS="-lpthread $LIBS" 172 AC_LINK_IFELSE( 173 [AC_LANG_PROGRAM( 174 [#include <pthread.h> 175 void *g(void *d) { return NULL; }], 176 [pthread_t t; pthread_create(&t,NULL,g,NULL);])], 177 [], 178 [AC_MSG_ERROR([Pthreads are required to build libgomp])])]) 179 180# Check for functions needed. 181AC_CHECK_FUNCS(getloadavg clock_gettime) 182 183# Check for broken semaphore implementation on darwin. 184# sem_init returns: sem_init error: Function not implemented. 185case "$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 ;; 190esac 191 192GCC_LINUX_FUTEX(:) 193 194# Check for pthread_{,attr_}[sg]etaffinity_np. 195AC_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.])) 212 213# 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. 215if test $ac_cv_func_clock_gettime = no; then 216 AC_CHECK_LIB(rt, clock_gettime, 217 [LIBS="-lrt $LIBS" 218 AC_DEFINE(HAVE_CLOCK_GETTIME, 1, 219 [Define to 1 if you have the `clock_gettime' function.])]) 220fi 221 222# See if we support thread-local storage. 223GCC_CHECK_TLS 224 225# See what sort of export controls are availible. 226LIBGOMP_CHECK_ATTRIBUTE_VISIBILITY 227LIBGOMP_CHECK_ATTRIBUTE_DLLEXPORT 228LIBGOMP_CHECK_ATTRIBUTE_ALIAS 229LIBGOMP_ENABLE_SYMVERS 230 231# Get target configury. 232. ${srcdir}/configure.tgt 233CFLAGS="$save_CFLAGS $XCFLAGS" 234 235# Check for __sync_val_compare_and_swap, but only after the target has 236# had a chance to set XCFLAGS. 237LIBGOMP_CHECK_SYNC_BUILTINS 238 239XCFLAGS="$XCFLAGS$XPCFLAGS" 240 241AC_SUBST(config_path) 242AC_SUBST(XCFLAGS) 243AC_SUBST(XLDFLAGS) 244 245# Cleanup and exit. 246CFLAGS="$save_CFLAGS" 247AC_CACHE_SAVE 248 249if test ${multilib} = yes; then 250 multilib_arg="--enable-multilib" 251else 252 multilib_arg= 253fi 254 255# Set up the set of libraries that we need to link against for libgomp. 256# Note that the GOMP_SELF_SPEC in gcc.c will force -pthread for -fopenmp, 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. 259if test $enable_shared = yes; then 260 link_gomp="-lgomp %{static: $LIBS}" 261else 262 link_gomp="-lgomp $LIBS" 263fi 264AC_SUBST(link_gomp) 265 266AM_CONDITIONAL([USE_FORTRAN], [test "$ac_cv_fc_compiler_gnu" = yes]) 267 268# ??? 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. 272save_CFLAGS="$CFLAGS" 273for 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 278done 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. 291OMP_LOCK_KIND=$OMP_LOCK_SIZE 292OMP_NEST_LOCK_KIND=$OMP_NEST_LOCK_SIZE 293if test $OMP_LOCK_SIZE -gt 8 || test $OMP_LOCK_ALIGN -gt $OMP_LOCK_SIZE; then 294 OMP_LOCK_KIND=8 295fi 296if test $OMP_NEST_LOCK_SIZE -gt 8 || test $OMP_NEST_LOCK_ALIGN -gt $OMP_NEST_LOCK_SIZE; then 297 OMP_NEST_LOCK_KIND=8 298fi 299 300AC_SUBST(OMP_LOCK_SIZE) 301AC_SUBST(OMP_LOCK_ALIGN) 302AC_SUBST(OMP_NEST_LOCK_SIZE) 303AC_SUBST(OMP_NEST_LOCK_ALIGN) 304AC_SUBST(OMP_LOCK_KIND) 305AC_SUBST(OMP_NEST_LOCK_KIND) 306CFLAGS="$save_CFLAGS" 307 308AC_CONFIG_FILES(omp.h omp_lib.h omp_lib.f90 libgomp_f.h) 309AC_CONFIG_FILES(Makefile testsuite/Makefile libgomp.spec) 310AC_OUTPUT 311