configure.ac revision 1.2
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# 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/$multi_os_directory ;; 92 esac 93 ;; 94esac 95AC_SUBST(toolexecdir) 96AC_SUBST(toolexeclibdir) 97 98# Check the compiler. 99# The same as in boehm-gc and libstdc++. Have to borrow it from there. 100# We must force CC to /not/ be precious variables; otherwise 101# the wrong, non-multilib-adjusted value will be used in multilibs. 102# As a side effect, we have to subst CFLAGS ourselves. 103 104m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS]) 105m4_define([_AC_ARG_VAR_PRECIOUS],[]) 106AC_PROG_CC 107m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS]) 108 109AC_SUBST(CFLAGS) 110 111# In order to override CFLAGS_FOR_TARGET, all of our special flags go 112# in XCFLAGS. But we need them in CFLAGS during configury. So put them 113# in both places for now and restore CFLAGS at the end of config. 114save_CFLAGS="$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 $gcc_cv_prog_makeinfo_modern = "yes") 134 135 136# Configure libtool 137AM_PROG_LIBTOOL 138ACX_LT_HOST_FLAGS 139AC_SUBST(enable_shared) 140AC_SUBST(enable_static) 141 142AM_MAINTAINER_MODE 143 144# Create a spec file, so that compile/link tests don't fail 145test -f libgfortran.spec || touch libgfortran.spec 146FCFLAGS="$FCFLAGS -L." 147 148# We need gfortran to compile parts of the library 149# We can't use AC_PROG_FC because it expects a fully working gfortran. 150#AC_PROG_FC(gfortran) 151case `echo $GFORTRAN` in 152 -* | no* ) 153 FC=no ;; 154 *) 155 set dummy $GFORTRAN; ac_word=$2 156 if test -x "$ac_word"; then 157 FC="$GFORTRAN" 158 else 159 FC=no 160 fi ;; 161esac 162AC_PROG_FC(gfortran) 163FCFLAGS="$FCFLAGS -Wall -L../libgfortran" 164 165# For libtool versioning info, format is CURRENT:REVISION:AGE 166libtool_VERSION=1:0:0 167AC_SUBST(libtool_VERSION) 168 169# Check header files. 170AC_STDC_HEADERS 171AC_HEADER_TIME 172ACX_HEADER_STRING 173AC_CHECK_HEADERS(unistd.h semaphore.h sys/loadavg.h sys/time.h sys/time.h) 174 175GCC_HEADER_STDINT(gstdint.h) 176 177# Check to see if -pthread or -lpthread is needed. Prefer the former. 178# In case the pthread.h system header is not found, this test will fail. 179XPCFLAGS="" 180CFLAGS="$CFLAGS -pthread" 181AC_LINK_IFELSE( 182 [AC_LANG_PROGRAM( 183 [#include <pthread.h> 184 void *g(void *d) { return NULL; }], 185 [pthread_t t; pthread_create(&t,NULL,g,NULL);])], 186 [XPCFLAGS=" -Wc,-pthread"], 187 [CFLAGS="$save_CFLAGS" LIBS="-lpthread $LIBS" 188 AC_LINK_IFELSE( 189 [AC_LANG_PROGRAM( 190 [#include <pthread.h> 191 void *g(void *d) { return NULL; }], 192 [pthread_t t; pthread_create(&t,NULL,g,NULL);])], 193 [], 194 [AC_MSG_ERROR([Pthreads are required to build libgomp])])]) 195 196# Check for functions needed. 197AC_CHECK_FUNCS(getloadavg clock_gettime strtoull) 198 199# Check for broken semaphore implementation on darwin. 200# sem_init returns: sem_init error: Function not implemented. 201case "$host" in 202 *-darwin*) 203 AC_DEFINE(HAVE_BROKEN_POSIX_SEMAPHORES, 1, 204 Define if the POSIX Semaphores do not work on your system.) 205 ;; 206esac 207 208GCC_LINUX_FUTEX(:) 209 210# Check for pthread_{,attr_}[sg]etaffinity_np. 211AC_LINK_IFELSE( 212 [AC_LANG_PROGRAM( 213 [#define _GNU_SOURCE 214 #include <pthread.h>], 215 [cpu_set_t cpuset; 216 pthread_attr_t attr; 217 pthread_getaffinity_np (pthread_self (), sizeof (cpu_set_t), &cpuset); 218 if (CPU_ISSET (0, &cpuset)) 219 CPU_SET (1, &cpuset); 220 else 221 CPU_ZERO (&cpuset); 222 pthread_setaffinity_np (pthread_self (), sizeof (cpu_set_t), &cpuset); 223 pthread_attr_init (&attr); 224 pthread_attr_getaffinity_np (&attr, sizeof (cpu_set_t), &cpuset); 225 pthread_attr_setaffinity_np (&attr, sizeof (cpu_set_t), &cpuset);])], 226 AC_DEFINE(HAVE_PTHREAD_AFFINITY_NP, 1, 227[ Define if pthread_{,attr_}{g,s}etaffinity_np is supported.])) 228 229# At least for glibc, clock_gettime is in librt. But don't pull that 230# in if it still doesn't give us the function we want. 231if test $ac_cv_func_clock_gettime = no; then 232 AC_CHECK_LIB(rt, clock_gettime, 233 [LIBS="-lrt $LIBS" 234 AC_DEFINE(HAVE_CLOCK_GETTIME, 1, 235 [Define to 1 if you have the `clock_gettime' function.])]) 236fi 237 238# See if we support thread-local storage. 239GCC_CHECK_TLS 240 241# See what sort of export controls are availible. 242LIBGOMP_CHECK_ATTRIBUTE_VISIBILITY 243LIBGOMP_CHECK_ATTRIBUTE_DLLEXPORT 244LIBGOMP_CHECK_ATTRIBUTE_ALIAS 245LIBGOMP_ENABLE_SYMVERS 246 247if test $enable_symvers = gnu; then 248 AC_DEFINE(LIBGOMP_GNU_SYMBOL_VERSIONING, 1, 249 [Define to 1 if GNU symbol versioning is used for libgomp.]) 250fi 251 252# Get target configury. 253. ${srcdir}/configure.tgt 254CFLAGS="$save_CFLAGS $XCFLAGS" 255 256# Check for __sync_val_compare_and_swap, but only after the target has 257# had a chance to set XCFLAGS. 258LIBGOMP_CHECK_SYNC_BUILTINS 259 260XCFLAGS="$XCFLAGS$XPCFLAGS" 261 262AC_SUBST(config_path) 263AC_SUBST(XCFLAGS) 264AC_SUBST(XLDFLAGS) 265 266# Cleanup and exit. 267CFLAGS="$save_CFLAGS" 268AC_CACHE_SAVE 269 270if test ${multilib} = yes; then 271 multilib_arg="--enable-multilib" 272else 273 multilib_arg= 274fi 275 276# Set up the set of libraries that we need to link against for libgomp. 277# Note that the GOMP_SELF_SPEC in gcc.c will force -pthread for -fopenmp, 278# which will force linkage against -lpthread (or equivalent for the system). 279# That's not 100% ideal, but about the best we can do easily. 280if test $enable_shared = yes; then 281 link_gomp="-lgomp %{static: $LIBS}" 282else 283 link_gomp="-lgomp $LIBS" 284fi 285AC_SUBST(link_gomp) 286 287AM_CONDITIONAL([USE_FORTRAN], [test "$ac_cv_fc_compiler_gnu" = yes]) 288 289# ??? 2006-01-24: Paulo committed to asking autoconf folk to document 290# and export AC_COMPUTE_INT. If that happens, then we'll need to remove 291# the underscore here and update the PREREQ. If it doesn't, then we'll 292# need to copy this macro to our acinclude.m4. 293save_CFLAGS="$CFLAGS" 294for i in $config_path; do 295 if test -f $srcdir/config/$i/omp-lock.h; then 296 CFLAGS="$CFLAGS -include confdefs.h -include $srcdir/config/$i/omp-lock.h" 297 break 298 fi 299done 300 301_AC_COMPUTE_INT([sizeof (omp_lock_t)], [OMP_LOCK_SIZE],, 302 [AC_MSG_ERROR([unsupported system, cannot find sizeof (omp_lock_t)])]) 303_AC_COMPUTE_INT([__alignof (omp_lock_t)], [OMP_LOCK_ALIGN]) 304_AC_COMPUTE_INT([sizeof (omp_nest_lock_t)], [OMP_NEST_LOCK_SIZE]) 305_AC_COMPUTE_INT([__alignof (omp_nest_lock_t)], [OMP_NEST_LOCK_ALIGN]) 306_AC_COMPUTE_INT([sizeof (omp_lock_25_t)], [OMP_LOCK_25_SIZE],, 307 [AC_MSG_ERROR([unsupported system, cannot find sizeof (omp_lock_25_t)])]) 308_AC_COMPUTE_INT([__alignof (omp_lock_25_t)], [OMP_LOCK_25_ALIGN]) 309_AC_COMPUTE_INT([sizeof (omp_nest_lock_25_t)], [OMP_NEST_LOCK_25_SIZE]) 310_AC_COMPUTE_INT([__alignof (omp_nest_lock_25_t)], [OMP_NEST_LOCK_25_ALIGN]) 311 312# If the lock fits in an integer, then arrange for Fortran to use that 313# integer. If it doesn't, then arrange for Fortran to use a pointer. 314# Except that we don't have a way at present to multi-lib the installed 315# Fortran modules, so we assume 8 bytes for pointers, regardless of the 316# actual target. 317OMP_LOCK_KIND=$OMP_LOCK_SIZE 318OMP_NEST_LOCK_KIND=$OMP_NEST_LOCK_SIZE 319if test $OMP_LOCK_SIZE -gt 8 || test $OMP_LOCK_ALIGN -gt $OMP_LOCK_SIZE; then 320 OMP_LOCK_KIND=8 321fi 322if test $OMP_NEST_LOCK_SIZE -gt 8 || test $OMP_NEST_LOCK_ALIGN -gt $OMP_NEST_LOCK_SIZE; then 323 OMP_NEST_LOCK_KIND=8 324fi 325OMP_LOCK_25_KIND=$OMP_LOCK_25_SIZE 326OMP_NEST_LOCK_25_KIND=$OMP_NEST_LOCK_25_SIZE 327if test $OMP_LOCK_25_SIZE -gt 8 || test $OMP_LOCK_25_ALIGN -gt $OMP_LOCK_25_SIZE; then 328 OMP_LOCK_25_KIND=8 329fi 330if test $OMP_NEST_LOCK_25_SIZE -gt 8 || test $OMP_NEST_LOCK_25_ALIGN -gt $OMP_NEST_LOCK_25_SIZE; then 331 OMP_NEST_LOCK_25_KIND=8 332fi 333 334AC_SUBST(OMP_LOCK_SIZE) 335AC_SUBST(OMP_LOCK_ALIGN) 336AC_SUBST(OMP_NEST_LOCK_SIZE) 337AC_SUBST(OMP_NEST_LOCK_ALIGN) 338AC_SUBST(OMP_LOCK_KIND) 339AC_SUBST(OMP_NEST_LOCK_KIND) 340AC_SUBST(OMP_LOCK_25_SIZE) 341AC_SUBST(OMP_LOCK_25_ALIGN) 342AC_SUBST(OMP_NEST_LOCK_25_SIZE) 343AC_SUBST(OMP_NEST_LOCK_25_ALIGN) 344AC_SUBST(OMP_LOCK_25_KIND) 345AC_SUBST(OMP_NEST_LOCK_25_KIND) 346CFLAGS="$save_CFLAGS" 347 348AC_CONFIG_FILES(omp.h omp_lib.h omp_lib.f90 libgomp_f.h) 349AC_CONFIG_FILES(Makefile libgomp.spec) 350AC_OUTPUT 351