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($enable_version_specific_runtime_libs) 17 18AC_MSG_CHECKING([for --enable-linux-futex]) 19LIBGOMP_ENABLE(linux-futex, default, , 20 [Use the Linux futex system call], 21 permit yes|no|default) 22AC_MSG_RESULT($enable_linux_futex) 23 24# We would like our source tree to be readonly. However when releases or 25# pre-releases are generated, the flex/bison generated files as well as the 26# various formats of manuals need to be included along with the rest of the 27# sources. Therefore we have --enable-generated-files-in-srcdir to do 28# just that. 29AC_MSG_CHECKING([for --enable-generated-files-in-srcdir]) 30LIBGOMP_ENABLE(generated-files-in-srcdir, no, , 31 [put copies of generated files in source dir intended for creating source 32 tarballs for users without texinfo bison or flex.], 33 permit yes|no) 34AC_MSG_RESULT($enable_generated_files_in_srcdir) 35AM_CONDITIONAL(GENINSRC, test "$enable_generated_files_in_srcdir" = yes) 36 37 38# ------- 39# ------- 40 41# Gets build, host, target, *_vendor, *_cpu, *_os, etc. 42# 43# You will slowly go insane if you do not grok the following fact: when 44# building this library, the top-level /target/ becomes the library's /host/. 45# 46# configure then causes --target to default to --host, exactly like any 47# other package using autoconf. Therefore, 'target' and 'host' will 48# always be the same. This makes sense both for native and cross compilers 49# just think about it for a little while. :-) 50# 51# Also, if this library is being configured as part of a cross compiler, the 52# top-level configure script will pass the "real" host as $with_cross_host. 53# 54# Do not delete or change the following two lines. For why, see 55# http://gcc.gnu.org/ml/libstdc++/2003-07/msg00451.html 56AC_CANONICAL_SYSTEM 57target_alias=${target_alias-$host_alias} 58 59# Sets up automake. Must come after AC_CANONICAL_SYSTEM. Each of the 60# following is magically included in AUTOMAKE_OPTIONS in each Makefile.am. 61# 1.9.0: minimum required version 62# no-define: PACKAGE and VERSION will not be #define'd in config.h (a bunch 63# of other PACKAGE_* variables will, however, and there's nothing 64# we can do about that; they come from AC_INIT). 65# foreign: we don't follow the normal rules for GNU packages (no COPYING 66# file in the top srcdir, etc, etc), so stop complaining. 67# no-dependencies: turns off auto dependency generation (just for now) 68# -Wall: turns on all automake warnings... 69# -Wno-portability: ...except this one, since GNU make is required. 70# -Wno-override: ... and this one, since we do want this in testsuite. 71AM_INIT_AUTOMAKE([1.9.0 foreign -Wall -Wno-portability -Wno-override]) 72AM_ENABLE_MULTILIB(, ..) 73 74# Calculate toolexeclibdir 75# Also toolexecdir, though it's only used in toolexeclibdir 76case ${enable_version_specific_runtime_libs} in 77 yes) 78 # Need the gcc compiler version to know where to install libraries 79 # and header files if --enable-version-specific-runtime-libs option 80 # is selected. 81 toolexecdir='$(libdir)/gcc/$(target_alias)' 82 toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)' 83 ;; 84 no) 85 if test -n "$with_cross_host" && 86 test x"$with_cross_host" != x"no"; then 87 # Install a library built with a cross compiler in tooldir, not libdir. 88 toolexecdir='$(exec_prefix)/$(target_alias)' 89 toolexeclibdir='$(toolexecdir)/lib' 90 else 91 toolexecdir='$(libdir)/gcc-lib/$(target_alias)' 92 toolexeclibdir='$(libdir)' 93 fi 94 multi_os_directory=`$CC -print-multi-os-directory` 95 case $multi_os_directory in 96 .) ;; # Avoid trailing /. 97 *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;; 98 esac 99 ;; 100esac 101AC_SUBST(toolexecdir) 102AC_SUBST(toolexeclibdir) 103 104# Check the compiler. 105# The same as in boehm-gc and libstdc++. Have to borrow it from there. 106# We must force CC to /not/ be precious variables; otherwise 107# the wrong, non-multilib-adjusted value will be used in multilibs. 108# As a side effect, we have to subst CFLAGS ourselves. 109 110m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS]) 111m4_define([_AC_ARG_VAR_PRECIOUS],[]) 112AC_PROG_CC 113m4_rename([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS]) 114 115AC_SUBST(CFLAGS) 116 117# In order to override CFLAGS_FOR_TARGET, all of our special flags go 118# in XCFLAGS. But we need them in CFLAGS during configury. So put them 119# in both places for now and restore CFLAGS at the end of config. 120save_CFLAGS="$CFLAGS" 121 122# Add -Wall -Werror if we are using GCC. 123if test "x$GCC" = "xyes"; then 124 XCFLAGS="$XCFLAGS -Wall -Werror" 125fi 126 127# Find other programs we need. 128AC_CHECK_TOOL(AR, ar) 129AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error) 130AC_PATH_PROG(PERL, perl, perl-not-found-in-path-error) 131AC_PROG_MAKE_SET 132AC_PROG_INSTALL 133 134# See if makeinfo has been installed and is modern enough 135# that we can use it. 136ACX_CHECK_PROG_VER([MAKEINFO], [makeinfo], [--version], 137 [GNU texinfo.* \([0-9][0-9.]*\)], 138 [4.[4-9]*]) 139AM_CONDITIONAL(BUILD_INFO, test $gcc_cv_prog_makeinfo_modern = "yes") 140 141 142# Configure libtool 143AM_PROG_LIBTOOL 144AC_SUBST(enable_shared) 145AC_SUBST(enable_static) 146 147AM_MAINTAINER_MODE 148 149# We need gfortran to compile parts of the library 150# We can't use AC_PROG_FC because it expects a fully working gfortran. 151#AC_PROG_FC(gfortran) 152FC="$GFORTRAN" 153AC_PROG_FC(gfortran) 154FCFLAGS="$FCFLAGS -Wall" 155 156# For libtool versioning info, format is CURRENT:REVISION:AGE 157libtool_VERSION=1:0:0 158AC_SUBST(libtool_VERSION) 159 160# Check header files. 161AC_STDC_HEADERS 162AC_HEADER_TIME 163AC_CHECK_HEADERS(unistd.h semaphore.h sys/loadavg.h sys/time.h) 164 165GCC_HEADER_STDINT(gstdint.h) 166 167# Check to see if -pthread or -lpthread is needed. Prefer the former. 168# In case the pthread.h system header is not found, this test will fail. 169XPCFLAGS="" 170CFLAGS="$CFLAGS -pthread" 171AC_LINK_IFELSE( 172 [AC_LANG_PROGRAM( 173 [#include <pthread.h> 174 void *g(void *d) { return NULL; }], 175 [pthread_t t; pthread_create(&t,NULL,g,NULL);])], 176 [XPCFLAGS=" -Wc,-pthread"], 177 [CFLAGS="$save_CFLAGS" LIBS="-lpthread $LIBS" 178 AC_LINK_IFELSE( 179 [AC_LANG_PROGRAM( 180 [#include <pthread.h> 181 void *g(void *d) { return NULL; }], 182 [pthread_t t; pthread_create(&t,NULL,g,NULL);])], 183 [], 184 [AC_MSG_ERROR([Pthreads are required to build libgomp])])]) 185 186# Check for functions needed. 187AC_CHECK_FUNCS(getloadavg clock_gettime) 188 189# Check for broken semaphore implementation on darwin. 190# sem_init returns: sem_init error: Function not implemented. 191case "$host" in 192 *-darwin*) 193 AC_DEFINE(HAVE_BROKEN_POSIX_SEMAPHORES, 1, 194 Define if the POSIX Semaphores do not work on your system.) 195 ;; 196 *-linux*) 197 case "$enable_linux_futex" in 198 default) 199 # If headers don't have gettid/futex syscalls definition, then 200 # default to no, otherwise there will be compile time failures. 201 # Otherwise, default to yes. If we don't detect we are 202 # compiled/linked against NPTL and not cross-compiling, check 203 # if programs are run by default against NPTL and if not, issue 204 # a warning. 205 enable_linux_futex=no 206 AC_LINK_IFELSE( 207 [AC_LANG_PROGRAM( 208 [#include <sys/syscall.h> 209 int lk;], 210 [syscall (SYS_gettid); syscall (SYS_futex, &lk, 0, 0, 0);])], 211 [AC_LINK_IFELSE( 212 [AC_LANG_PROGRAM( 213 [#ifndef _GNU_SOURCE 214 #define _GNU_SOURCE 1 215 #endif 216 #include <pthread.h> 217 pthread_t th; void *status;], 218 [pthread_tryjoin_np (th, &status);])],[enable_linux_futex=yes], 219 [if test x$cross_compiling = xno; then 220 if getconf GNU_LIBPTHREAD_VERSION 2>/dev/null \ 221 | LC_ALL=C grep -i NPTL > /dev/null 2>/dev/null; then 222 AC_MSG_WARN([The kernel might not support futex or gettid syscalls. 223If so, please configure with --disable-linux-futex]) 224 fi 225 fi 226 enable_linux_futex=yes])]) 227 ;; 228 yes) 229 AC_LINK_IFELSE( 230 [AC_LANG_PROGRAM( 231 [#include <sys/syscall.h> 232 int lk;], 233 [syscall (SYS_gettid); syscall (SYS_futex, &lk, 0, 0, 0);])],[], 234 [AC_MSG_ERROR([SYS_gettid and SYS_futex required for --enable-linux-futex])]) 235 ;; 236 esac 237 ;; 238esac 239 240# At least for glibc, clock_gettime is in librt. But don't pull that 241# in if it still doesn't give us the function we want. 242if test $ac_cv_func_clock_gettime = no; then 243 AC_CHECK_LIB(rt, clock_gettime, 244 [LIBS="-lrt $LIBS" 245 AC_DEFINE(HAVE_CLOCK_GETTIME, 1, 246 [Define to 1 if you have the `clock_gettime' function.])]) 247fi 248 249# See if we support thread-local storage. 250GCC_CHECK_TLS 251 252# See what sort of export controls are availible. 253LIBGOMP_CHECK_ATTRIBUTE_VISIBILITY 254LIBGOMP_CHECK_ATTRIBUTE_DLLEXPORT 255LIBGOMP_CHECK_ATTRIBUTE_ALIAS 256LIBGOMP_ENABLE_SYMVERS 257 258# Get target configury. 259. ${srcdir}/configure.tgt 260CFLAGS="$save_CFLAGS $XCFLAGS" 261 262# Check for __sync_val_compare_and_swap, but only after the target has 263# had a chance to set XCFLAGS. 264LIBGOMP_CHECK_SYNC_BUILTINS 265 266XCFLAGS="$XCFLAGS$XPCFLAGS" 267 268AC_SUBST(config_path) 269AC_SUBST(XCFLAGS) 270AC_SUBST(XLDFLAGS) 271 272# Cleanup and exit. 273CFLAGS="$save_CFLAGS" 274AC_CACHE_SAVE 275 276if test ${multilib} = yes; then 277 multilib_arg="--enable-multilib" 278else 279 multilib_arg= 280fi 281 282# Set up the set of libraries that we need to link against for libgomp. 283# Note that the GOMP_SELF_SPEC in gcc.c will force -pthread for -fopenmp, 284# which will force linkage against -lpthread (or equivalent for the system). 285# That's not 100% ideal, but about the best we can do easily. 286if test $enable_shared = yes; then 287 link_gomp="-lgomp %{static: $LIBS}" 288else 289 link_gomp="-lgomp $LIBS" 290fi 291AC_SUBST(link_gomp) 292 293AM_CONDITIONAL([USE_FORTRAN], [test "$ac_cv_fc_compiler_gnu" = yes]) 294 295# ??? 2006-01-24: Paulo committed to asking autoconf folk to document 296# and export AC_COMPUTE_INT. If that happens, then we'll need to remove 297# the underscore here and update the PREREQ. If it doesn't, then we'll 298# need to copy this macro to our acinclude.m4. 299save_CFLAGS="$CFLAGS" 300for i in $config_path; do 301 if test -f $srcdir/config/$i/omp-lock.h; then 302 CFLAGS="$CFLAGS -include $srcdir/config/$i/omp-lock.h" 303 break 304 fi 305done 306 307_AC_COMPUTE_INT([sizeof (omp_lock_t)], [OMP_LOCK_SIZE],, 308 [AC_MSG_ERROR([unsupported system, cannot find sizeof (omp_lock_t)])]) 309_AC_COMPUTE_INT([__alignof (omp_lock_t)], [OMP_LOCK_ALIGN]) 310_AC_COMPUTE_INT([sizeof (omp_nest_lock_t)], [OMP_NEST_LOCK_SIZE]) 311_AC_COMPUTE_INT([__alignof (omp_nest_lock_t)], [OMP_NEST_LOCK_ALIGN]) 312 313# If the lock fits in an integer, then arrange for Fortran to use that 314# integer. If it doesn't, then arrange for Fortran to use a pointer. 315# Except that we don't have a way at present to multi-lib the installed 316# Fortran modules, so we assume 8 bytes for pointers, regardless of the 317# actual target. 318OMP_LOCK_KIND=$OMP_LOCK_SIZE 319OMP_NEST_LOCK_KIND=$OMP_NEST_LOCK_SIZE 320if test $OMP_LOCK_SIZE -gt 8 || test $OMP_LOCK_ALIGN -gt $OMP_LOCK_SIZE; then 321 OMP_LOCK_KIND=8 322fi 323if test $OMP_NEST_LOCK_SIZE -gt 8 || test $OMP_NEST_LOCK_ALIGN -gt $OMP_NEST_LOCK_SIZE; then 324 OMP_NEST_LOCK_KIND=8 325fi 326 327AC_SUBST(OMP_LOCK_SIZE) 328AC_SUBST(OMP_LOCK_ALIGN) 329AC_SUBST(OMP_NEST_LOCK_SIZE) 330AC_SUBST(OMP_NEST_LOCK_ALIGN) 331AC_SUBST(OMP_LOCK_KIND) 332AC_SUBST(OMP_NEST_LOCK_KIND) 333CFLAGS="$save_CFLAGS" 334 335AC_CONFIG_FILES(omp.h omp_lib.h omp_lib.f90 libgomp_f.h) 336AC_CONFIG_FILES(Makefile testsuite/Makefile libgomp.spec) 337AC_OUTPUT 338