1# Process this file with autoconf to produce a configure script, like so: 2# aclocal -I ../config && autoconf && autoheader && automake 3 4AC_PREREQ(2.64) 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# -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. 64AM_INIT_AUTOMAKE([1.9.0 foreign -Wall -Wno-portability -Wno-override]) 65AM_ENABLE_MULTILIB(, ..) 66 67# Calculate toolexeclibdir 68# Also toolexecdir, though it's only used in toolexeclibdir 69case ${enable_version_specific_runtime_libs} in 70 yes) 71 # Need the gcc compiler version to know where to install libraries 72 # and header files if --enable-version-specific-runtime-libs option 73 # is selected. 74 toolexecdir='$(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/$multi_os_directory ;; 91 esac 92 ;; 93esac 94AC_SUBST(toolexecdir) 95AC_SUBST(toolexeclibdir) 96 97# Check the compiler. 98# The same as in boehm-gc and libstdc++. Have to borrow it from there. 99# We must force CC to /not/ be precious variables; otherwise 100# the wrong, non-multilib-adjusted value will be used in multilibs. 101# As a side effect, we have to subst CFLAGS ourselves. 102 103m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS]) 104m4_define([_AC_ARG_VAR_PRECIOUS],[]) 105AC_PROG_CC 106m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS]) 107 108AC_SUBST(CFLAGS) 109 110# In order to override CFLAGS_FOR_TARGET, all of our special flags go 111# in XCFLAGS. But we need them in CFLAGS during configury. So put them 112# in both places for now and restore CFLAGS at the end of config. 113save_CFLAGS="$CFLAGS" 114 115# Add -Wall -Werror if we are using GCC. 116if test "x$GCC" = "xyes"; then 117 XCFLAGS="$XCFLAGS -Wall -Werror" 118fi 119 120# Find other programs we need. 121AC_CHECK_TOOL(AR, ar) 122AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error) 123AC_PATH_PROG(PERL, perl, perl-not-found-in-path-error) 124AC_PROG_MAKE_SET 125AC_PROG_INSTALL 126 127# See if makeinfo has been installed and is modern enough 128# that we can use it. 129ACX_CHECK_PROG_VER([MAKEINFO], [makeinfo], [--version], 130 [GNU texinfo.* \([0-9][0-9.]*\)], 131 [4.[4-9]*|4.[1-9][0-9]*|[5-9]*|[1-9][0-9]*]) 132AM_CONDITIONAL(BUILD_INFO, test $gcc_cv_prog_makeinfo_modern = "yes") 133 134 135# Configure libtool 136AM_PROG_LIBTOOL 137AC_SUBST(enable_shared) 138AC_SUBST(enable_static) 139 140AM_MAINTAINER_MODE 141 142# 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) 145case `echo $GFORTRAN` in 146 -* | no* ) 147 FC=no ;; 148 *) 149 set dummy $GFORTRAN; ac_word=$2 150 if test -x "$ac_word"; then 151 FC="$GFORTRAN" 152 else 153 FC=no 154 fi ;; 155esac 156AC_PROG_FC(gfortran) 157FCFLAGS="$FCFLAGS -Wall" 158 159# For libtool versioning info, format is CURRENT:REVISION:AGE 160libtool_VERSION=1:0:0 161AC_SUBST(libtool_VERSION) 162 163# Check header files. 164AC_STDC_HEADERS 165AC_HEADER_TIME 166ACX_HEADER_STRING 167AC_CHECK_HEADERS(unistd.h semaphore.h sys/loadavg.h sys/time.h sys/time.h) 168 169GCC_HEADER_STDINT(gstdint.h) 170 171# Check to see if -pthread or -lpthread is needed. Prefer the former. 172# In case the pthread.h system header is not found, this test will fail. 173XPCFLAGS="" 174CFLAGS="$CFLAGS -pthread" 175AC_LINK_IFELSE( 176 [AC_LANG_PROGRAM( 177 [#include <pthread.h> 178 void *g(void *d) { return NULL; }], 179 [pthread_t t; pthread_create(&t,NULL,g,NULL);])], 180 [XPCFLAGS=" -Wc,-pthread"], 181 [CFLAGS="$save_CFLAGS" LIBS="-lpthread $LIBS" 182 AC_LINK_IFELSE( 183 [AC_LANG_PROGRAM( 184 [#include <pthread.h> 185 void *g(void *d) { return NULL; }], 186 [pthread_t t; pthread_create(&t,NULL,g,NULL);])], 187 [], 188 [AC_MSG_ERROR([Pthreads are required to build libgomp])])]) 189 190# Check for functions needed. 191AC_CHECK_FUNCS(getloadavg clock_gettime strtoull) 192 193# Check for broken semaphore implementation on darwin. 194# sem_init returns: sem_init error: Function not implemented. 195case "$host" in 196 *-darwin*) 197 AC_DEFINE(HAVE_BROKEN_POSIX_SEMAPHORES, 1, 198 Define if the POSIX Semaphores do not work on your system.) 199 ;; 200esac 201 202GCC_LINUX_FUTEX(:) 203 204# Check for pthread_{,attr_}[sg]etaffinity_np. 205AC_LINK_IFELSE( 206 [AC_LANG_PROGRAM( 207 [#define _GNU_SOURCE 208 #include <pthread.h>], 209 [cpu_set_t cpuset; 210 pthread_attr_t attr; 211 pthread_getaffinity_np (pthread_self (), sizeof (cpu_set_t), &cpuset); 212 if (CPU_ISSET (0, &cpuset)) 213 CPU_SET (1, &cpuset); 214 else 215 CPU_ZERO (&cpuset); 216 pthread_setaffinity_np (pthread_self (), sizeof (cpu_set_t), &cpuset); 217 pthread_attr_init (&attr); 218 pthread_attr_getaffinity_np (&attr, sizeof (cpu_set_t), &cpuset); 219 pthread_attr_setaffinity_np (&attr, sizeof (cpu_set_t), &cpuset);])], 220 AC_DEFINE(HAVE_PTHREAD_AFFINITY_NP, 1, 221[ Define if pthread_{,attr_}{g,s}etaffinity_np is supported.])) 222 223# At least for glibc, clock_gettime is in librt. But don't pull that 224# in if it still doesn't give us the function we want. 225if test $ac_cv_func_clock_gettime = no; then 226 AC_CHECK_LIB(rt, clock_gettime, 227 [LIBS="-lrt $LIBS" 228 AC_DEFINE(HAVE_CLOCK_GETTIME, 1, 229 [Define to 1 if you have the `clock_gettime' function.])]) 230fi 231 232# See if we support thread-local storage. 233GCC_CHECK_TLS 234 235# See what sort of export controls are availible. 236LIBGOMP_CHECK_ATTRIBUTE_VISIBILITY 237LIBGOMP_CHECK_ATTRIBUTE_DLLEXPORT 238LIBGOMP_CHECK_ATTRIBUTE_ALIAS 239LIBGOMP_ENABLE_SYMVERS 240 241if test $enable_symvers = gnu; then 242 AC_DEFINE(LIBGOMP_GNU_SYMBOL_VERSIONING, 1, 243 [Define to 1 if GNU symbol versioning is used for libgomp.]) 244fi 245 246# Get target configury. 247. ${srcdir}/configure.tgt 248CFLAGS="$save_CFLAGS $XCFLAGS" 249 250# Check for __sync_val_compare_and_swap, but only after the target has 251# had a chance to set XCFLAGS. 252LIBGOMP_CHECK_SYNC_BUILTINS 253 254XCFLAGS="$XCFLAGS$XPCFLAGS" 255 256AC_SUBST(config_path) 257AC_SUBST(XCFLAGS) 258AC_SUBST(XLDFLAGS) 259 260# Cleanup and exit. 261CFLAGS="$save_CFLAGS" 262AC_CACHE_SAVE 263 264if test ${multilib} = yes; then 265 multilib_arg="--enable-multilib" 266else 267 multilib_arg= 268fi 269 270# Set up the set of libraries that we need to link against for libgomp. 271# Note that the GOMP_SELF_SPEC in gcc.c will force -pthread for -fopenmp, 272# which will force linkage against -lpthread (or equivalent for the system). 273# That's not 100% ideal, but about the best we can do easily. 274if test $enable_shared = yes; then 275 link_gomp="-lgomp %{static: $LIBS}" 276else 277 link_gomp="-lgomp $LIBS" 278fi 279AC_SUBST(link_gomp) 280 281AM_CONDITIONAL([USE_FORTRAN], [test "$ac_cv_fc_compiler_gnu" = yes]) 282 283# ??? 2006-01-24: Paulo committed to asking autoconf folk to document 284# and export AC_COMPUTE_INT. If that happens, then we'll need to remove 285# the underscore here and update the PREREQ. If it doesn't, then we'll 286# need to copy this macro to our acinclude.m4. 287save_CFLAGS="$CFLAGS" 288for i in $config_path; do 289 if test -f $srcdir/config/$i/omp-lock.h; then 290 CFLAGS="$CFLAGS -include confdefs.h -include $srcdir/config/$i/omp-lock.h" 291 break 292 fi 293done 294 295_AC_COMPUTE_INT([sizeof (omp_lock_t)], [OMP_LOCK_SIZE],, 296 [AC_MSG_ERROR([unsupported system, cannot find sizeof (omp_lock_t)])]) 297_AC_COMPUTE_INT([__alignof (omp_lock_t)], [OMP_LOCK_ALIGN]) 298_AC_COMPUTE_INT([sizeof (omp_nest_lock_t)], [OMP_NEST_LOCK_SIZE]) 299_AC_COMPUTE_INT([__alignof (omp_nest_lock_t)], [OMP_NEST_LOCK_ALIGN]) 300_AC_COMPUTE_INT([sizeof (omp_lock_25_t)], [OMP_LOCK_25_SIZE],, 301 [AC_MSG_ERROR([unsupported system, cannot find sizeof (omp_lock_25_t)])]) 302_AC_COMPUTE_INT([__alignof (omp_lock_25_t)], [OMP_LOCK_25_ALIGN]) 303_AC_COMPUTE_INT([sizeof (omp_nest_lock_25_t)], [OMP_NEST_LOCK_25_SIZE]) 304_AC_COMPUTE_INT([__alignof (omp_nest_lock_25_t)], [OMP_NEST_LOCK_25_ALIGN]) 305 306# If the lock fits in an integer, then arrange for Fortran to use that 307# integer. If it doesn't, then arrange for Fortran to use a pointer. 308# Except that we don't have a way at present to multi-lib the installed 309# Fortran modules, so we assume 8 bytes for pointers, regardless of the 310# actual target. 311OMP_LOCK_KIND=$OMP_LOCK_SIZE 312OMP_NEST_LOCK_KIND=$OMP_NEST_LOCK_SIZE 313if test $OMP_LOCK_SIZE -gt 8 || test $OMP_LOCK_ALIGN -gt $OMP_LOCK_SIZE; then 314 OMP_LOCK_KIND=8 315fi 316if test $OMP_NEST_LOCK_SIZE -gt 8 || test $OMP_NEST_LOCK_ALIGN -gt $OMP_NEST_LOCK_SIZE; then 317 OMP_NEST_LOCK_KIND=8 318fi 319OMP_LOCK_25_KIND=$OMP_LOCK_25_SIZE 320OMP_NEST_LOCK_25_KIND=$OMP_NEST_LOCK_25_SIZE 321if test $OMP_LOCK_25_SIZE -gt 8 || test $OMP_LOCK_25_ALIGN -gt $OMP_LOCK_25_SIZE; then 322 OMP_LOCK_25_KIND=8 323fi 324if test $OMP_NEST_LOCK_25_SIZE -gt 8 || test $OMP_NEST_LOCK_25_ALIGN -gt $OMP_NEST_LOCK_25_SIZE; then 325 OMP_NEST_LOCK_25_KIND=8 326fi 327 328AC_SUBST(OMP_LOCK_SIZE) 329AC_SUBST(OMP_LOCK_ALIGN) 330AC_SUBST(OMP_NEST_LOCK_SIZE) 331AC_SUBST(OMP_NEST_LOCK_ALIGN) 332AC_SUBST(OMP_LOCK_KIND) 333AC_SUBST(OMP_NEST_LOCK_KIND) 334AC_SUBST(OMP_LOCK_25_SIZE) 335AC_SUBST(OMP_LOCK_25_ALIGN) 336AC_SUBST(OMP_NEST_LOCK_25_SIZE) 337AC_SUBST(OMP_NEST_LOCK_25_ALIGN) 338AC_SUBST(OMP_LOCK_25_KIND) 339AC_SUBST(OMP_NEST_LOCK_25_KIND) 340CFLAGS="$save_CFLAGS" 341 342AC_CONFIG_FILES(omp.h omp_lib.h omp_lib.f90 libgomp_f.h) 343AC_CONFIG_FILES(Makefile testsuite/Makefile libgomp.spec) 344AC_OUTPUT 345