1# Process this file with autoconf to produce a configure script, like so: 2# aclocal && autoconf && autoheader && automake 3 4AC_PREREQ(2.64) 5AC_INIT([GNU Fortran Runtime Library], 0.3,,[libgfortran]) 6AC_CONFIG_HEADER(config.h) 7GCC_TOPLEV_SUBDIRS 8 9# ------- 10# Options 11# ------- 12 13AC_MSG_CHECKING([for --enable-version-specific-runtime-libs]) 14AC_ARG_ENABLE(version-specific-runtime-libs, 15AS_HELP_STRING([--enable-version-specific-runtime-libs], 16 [specify that runtime libraries should be installed in a compiler-specific directory]), 17[case "$enableval" in 18 yes) version_specific_libs=yes ;; 19 no) version_specific_libs=no ;; 20 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);; 21 esac], 22[version_specific_libs=no]) 23AC_MSG_RESULT($version_specific_libs) 24 25# Build with intermodule optimisations 26AC_MSG_CHECKING([for --enable-intermodule]) 27AC_ARG_ENABLE(intermodule, 28AS_HELP_STRING([--enable-intermodule],[build the library in one step]), 29[case "$enable_intermodule" in 30 yes) onestep="-onestep";; 31 *) onestep="";; 32esac], 33[onestep=""]) 34AC_MSG_RESULT($enable_intermodule) 35AM_CONDITIONAL(onestep,[test x$onestep = x-onestep]) 36AC_SUBST(onestep) 37 38# Gets build, host, target, *_vendor, *_cpu, *_os, etc. 39# 40# You will slowly go insane if you do not grok the following fact: when 41# building this library, the top-level /target/ becomes the library's /host/. 42# 43# configure then causes --target to default to --host, exactly like any 44# other package using autoconf. Therefore, 'target' and 'host' will 45# always be the same. This makes sense both for native and cross compilers 46# just think about it for a little while. :-) 47# 48# Also, if this library is being configured as part of a cross compiler, the 49# top-level configure script will pass the "real" host as $with_cross_host. 50# 51# Do not delete or change the following two lines. For why, see 52# http://gcc.gnu.org/ml/libstdc++/2003-07/msg00451.html 53AC_CANONICAL_SYSTEM 54ACX_NONCANONICAL_TARGET 55 56target_alias=${target_alias-$host_alias} 57AC_SUBST(target_alias) 58 59# Sets up automake. Must come after AC_CANONICAL_SYSTEM. Each of the 60# following is magically included in AUTOMAKE_OPTIONS in each Makefile.am. 61# 1.9.6: minimum required version 62# no-define: PACKAGE and VERSION will not be #define'd in config.h (a bunch 63# of other PACKAGE_* variables will, however, and there's nothing 64# we can do about that; they come from AC_INIT). 65# foreign: we don't follow the normal rules for GNU packages (no COPYING 66# file in the top srcdir, etc, etc), so stop complaining. 67# no-dist: we don't want 'dist' and related rules. 68# -Wall: turns on all automake warnings... 69# -Wno-portability: ...except this one, since GNU make is required. 70AM_INIT_AUTOMAKE([1.9.6 no-define foreign no-dist -Wall -Wno-portability]) 71 72AM_MAINTAINER_MODE 73AM_ENABLE_MULTILIB(, ..) 74 75# Handy for debugging: 76#AC_MSG_NOTICE($build / $host / $target / $host_alias / $target_alias); sleep 5 77 78# Are we being configured with some form of cross compiler? 79# NB: We don't actually need to know this just now, but when, say, a test 80# suite is included, we'll have to know. 81if test "$build" != "$host"; then 82 LIBGFOR_IS_NATIVE=false 83 GCC_NO_EXECUTABLES 84else 85 LIBGFOR_IS_NATIVE=true 86fi 87 88AC_USE_SYSTEM_EXTENSIONS 89 90# Calculate toolexeclibdir 91# Also toolexecdir, though it's only used in toolexeclibdir 92case ${version_specific_libs} in 93 yes) 94 # Need the gcc compiler version to know where to install libraries 95 # and header files if --enable-version-specific-runtime-libs option 96 # is selected. 97 toolexecdir='$(libdir)/gcc/$(target_alias)' 98 toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)' 99 ;; 100 no) 101 if test -n "$with_cross_host" && 102 test x"$with_cross_host" != x"no"; then 103 # Install a library built with a cross compiler in tooldir, not libdir. 104 toolexecdir='$(exec_prefix)/$(target_alias)' 105 toolexeclibdir='$(toolexecdir)/lib' 106 else 107 toolexecdir='$(libdir)/gcc-lib/$(target_alias)' 108 toolexeclibdir='$(libdir)' 109 fi 110 multi_os_directory=`$CC -print-multi-os-directory` 111 case $multi_os_directory in 112 .) ;; # Avoid trailing /. 113 *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;; 114 esac 115 ;; 116esac 117AC_SUBST(toolexecdir) 118AC_SUBST(toolexeclibdir) 119 120# Create a spec file, so that compile/link tests don't fail 121test -f libgfortran.spec || touch libgfortran.spec 122 123AC_LANG_C 124# Check the compiler. 125# The same as in boehm-gc and libstdc++. Have to borrow it from there. 126# We must force CC to /not/ be precious variables; otherwise 127# the wrong, non-multilib-adjusted value will be used in multilibs. 128# As a side effect, we have to subst CFLAGS ourselves. 129 130m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS]) 131m4_define([_AC_ARG_VAR_PRECIOUS],[]) 132AC_PROG_CC 133m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS]) 134 135AC_SUBST(CFLAGS) 136 137AM_PROG_CC_C_O 138 139# Add -Wall -fno-repack-arrays -fno-underscoring if we are using GCC. 140if test "x$GCC" = "xyes"; then 141 AM_FCFLAGS="-I . -Wall -Werror -fimplicit-none -fno-repack-arrays -fno-underscoring" 142 ## We like to use C99 routines when available. This makes sure that 143 ## __STDC_VERSION__ is set such that libc includes make them available. 144 AM_CFLAGS="-std=gnu99 -Wall -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition -Wextra -Wwrite-strings" 145 ## Compile the following tests with the same system header contents 146 ## that we'll encounter when compiling our own source files. 147 CFLAGS="-std=gnu99 $CFLAGS" 148fi 149AC_SUBST(AM_FCFLAGS) 150AC_SUBST(AM_CFLAGS) 151AC_SUBST(CFLAGS) 152 153# Check for symbol versioning (copied from libssp). 154AC_MSG_CHECKING([whether symbol versioning is supported]) 155AC_ARG_ENABLE(symvers, 156AS_HELP_STRING([--disable-symvers], 157 [disable symbol versioning for libgfortran]), 158gfortran_use_symver=$enableval, 159gfortran_use_symver=yes) 160if test "x$gfortran_use_symver" != xno; then 161 save_LDFLAGS="$LDFLAGS" 162 LDFLAGS="$LDFLAGS -fPIC -shared -Wl,--version-script,./conftest.map" 163 cat > conftest.map <<EOF 164FOO_1.0 { 165 global: *foo*; bar; local: *; 166}; 167EOF 168 AC_LINK_IFELSE([AC_LANG_PROGRAM([[int foo;]],[[]])],[gfortran_use_symver=gnu],[gfortran_use_symver=no]) 169 if test x$gfortran_use_symver = xno; then 170 case "$target_os" in 171 solaris2*) 172 LDFLAGS="$save_LDFLAGS" 173 LDFLAGS="$LDFLAGS -fPIC -shared -Wl,-M,./conftest.map" 174 # Sun ld cannot handle wildcards and treats all entries as undefined. 175 cat > conftest.map <<EOF 176FOO_1.0 { 177 global: foo; local: *; 178}; 179EOF 180 AC_LINK_IFELSE([AC_LANG_PROGRAM([[int foo;]],[[]])],[gfortran_use_symver=sun],[gfortran_use_symver=no]) 181 ;; 182 esac 183 fi 184 LDFLAGS="$save_LDFLAGS" 185fi 186AC_MSG_RESULT($gfortran_use_symver) 187AM_CONDITIONAL(LIBGFOR_USE_SYMVER, [test "x$gfortran_use_symver" != xno]) 188AM_CONDITIONAL(LIBGFOR_USE_SYMVER_GNU, [test "x$gfortran_use_symver" = xgnu]) 189AM_CONDITIONAL(LIBGFOR_USE_SYMVER_SUN, [test "x$gfortran_use_symver" = xsun]) 190 191# Figure out whether the compiler supports "-ffunction-sections -fdata-sections", 192# similarly to how libstdc++ does it 193ac_test_CFLAGS="${CFLAGS+set}" 194ac_save_CFLAGS="$CFLAGS" 195 196# Check for -ffunction-sections -fdata-sections 197AC_MSG_CHECKING([for gcc that supports -ffunction-sections -fdata-sections]) 198CFLAGS='-Werror -ffunction-sections -fdata-sections' 199AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[int foo;]])], [ac_fdsections=yes], [ac_fdsections=no]) 200if test "$ac_test_CFLAGS" = set; then 201 CFLAGS="$ac_save_CFLAGS" 202else 203 # this is the suspicious part 204 CFLAGS="" 205fi 206if test x"$ac_fdsections" = x"yes"; then 207 SECTION_FLAGS='-ffunction-sections -fdata-sections' 208fi 209AC_MSG_RESULT($ac_fdsections) 210AC_SUBST(SECTION_FLAGS) 211 212# Find other programs we need. 213AC_CHECK_TOOL(AS, as) 214AC_CHECK_TOOL(AR, ar) 215AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error) 216AC_PROG_MAKE_SET 217AC_PROG_INSTALL 218 219# Configure libtool 220#AC_MSG_NOTICE([====== Starting libtool configuration]) 221AC_LIBTOOL_DLOPEN 222AM_PROG_LIBTOOL 223ACX_LT_HOST_FLAGS 224AC_SUBST(enable_shared) 225AC_SUBST(enable_static) 226#AC_MSG_NOTICE([====== Finished libtool configuration]) ; sleep 10 227 228# We need gfortran to compile parts of the library 229#AC_PROG_FC(gfortran) 230FC="$GFORTRAN" 231AC_PROG_FC(gfortran) 232 233# extra LD Flags which are required for targets 234case "${host}" in 235 *-darwin*) 236 # Darwin needs -single_module when linking libgfortran 237 extra_ldflags_libgfortran=-Wl,-single_module 238 ;; 239esac 240AC_SUBST(extra_ldflags_libgfortran) 241 242# We need a working compiler at that point, otherwise give a clear 243# error message and bail out. 244LIBGFOR_WORKING_GFORTRAN 245 246AC_SYS_LARGEFILE 247 248# Types 249AC_TYPE_OFF_T 250AC_TYPE_INTPTR_T 251AC_TYPE_UINTPTR_T 252AC_CHECK_TYPES([ptrdiff_t]) 253 254# check header files (we assume C89 is available, so don't check for that) 255AC_CHECK_HEADERS_ONCE(unistd.h sys/time.h sys/times.h sys/resource.h \ 256sys/types.h sys/stat.h sys/wait.h floatingpoint.h ieeefp.h fenv.h fptrap.h \ 257pwd.h complex.h) 258 259GCC_HEADER_STDINT(gstdint.h) 260 261AC_CHECK_MEMBERS([struct stat.st_blksize, struct stat.st_blocks, struct stat.st_rdev]) 262 263# Check for library functions. 264AC_CHECK_FUNCS_ONCE(getrusage times mkstemp strtof strtold snprintf \ 265ftruncate chsize chdir getlogin gethostname kill link symlink sleep ttyname \ 266alarm access fork execl wait setmode execve pipe dup2 close \ 267strcasestr getrlimit gettimeofday stat fstat lstat getpwuid vsnprintf dup \ 268getcwd localtime_r gmtime_r getpwuid_r ttyname_r clock_gettime \ 269readlink getgid getpid getppid getuid geteuid umask getegid \ 270secure_getenv __secure_getenv) 271 272# Check strerror_r, cannot be above as versions with two and three arguments exist 273LIBGFOR_CHECK_STRERROR_R 274 275# Check for C99 (and other IEEE) math functions 276GCC_CHECK_MATH_FUNC([acosf]) 277GCC_CHECK_MATH_FUNC([acos]) 278GCC_CHECK_MATH_FUNC([acosl]) 279GCC_CHECK_MATH_FUNC([acoshf]) 280GCC_CHECK_MATH_FUNC([acosh]) 281GCC_CHECK_MATH_FUNC([acoshl]) 282GCC_CHECK_MATH_FUNC([asinf]) 283GCC_CHECK_MATH_FUNC([asin]) 284GCC_CHECK_MATH_FUNC([asinl]) 285GCC_CHECK_MATH_FUNC([asinhf]) 286GCC_CHECK_MATH_FUNC([asinh]) 287GCC_CHECK_MATH_FUNC([asinhl]) 288GCC_CHECK_MATH_FUNC([atan2f]) 289GCC_CHECK_MATH_FUNC([atan2]) 290GCC_CHECK_MATH_FUNC([atan2l]) 291GCC_CHECK_MATH_FUNC([atanf]) 292GCC_CHECK_MATH_FUNC([atan]) 293GCC_CHECK_MATH_FUNC([atanl]) 294GCC_CHECK_MATH_FUNC([atanhf]) 295GCC_CHECK_MATH_FUNC([atanh]) 296GCC_CHECK_MATH_FUNC([atanhl]) 297GCC_CHECK_MATH_FUNC([cargf]) 298GCC_CHECK_MATH_FUNC([carg]) 299GCC_CHECK_MATH_FUNC([cargl]) 300GCC_CHECK_MATH_FUNC([ceilf]) 301GCC_CHECK_MATH_FUNC([ceil]) 302GCC_CHECK_MATH_FUNC([ceill]) 303GCC_CHECK_MATH_FUNC([copysignf]) 304GCC_CHECK_MATH_FUNC([copysign]) 305GCC_CHECK_MATH_FUNC([copysignl]) 306GCC_CHECK_MATH_FUNC([cosf]) 307GCC_CHECK_MATH_FUNC([cos]) 308GCC_CHECK_MATH_FUNC([cosl]) 309GCC_CHECK_MATH_FUNC([ccosf]) 310GCC_CHECK_MATH_FUNC([ccos]) 311GCC_CHECK_MATH_FUNC([ccosl]) 312GCC_CHECK_MATH_FUNC([coshf]) 313GCC_CHECK_MATH_FUNC([cosh]) 314GCC_CHECK_MATH_FUNC([coshl]) 315GCC_CHECK_MATH_FUNC([ccoshf]) 316GCC_CHECK_MATH_FUNC([ccosh]) 317GCC_CHECK_MATH_FUNC([ccoshl]) 318GCC_CHECK_MATH_FUNC([expf]) 319GCC_CHECK_MATH_FUNC([exp]) 320GCC_CHECK_MATH_FUNC([expl]) 321GCC_CHECK_MATH_FUNC([cexpf]) 322GCC_CHECK_MATH_FUNC([cexp]) 323GCC_CHECK_MATH_FUNC([cexpl]) 324GCC_CHECK_MATH_FUNC([fabsf]) 325GCC_CHECK_MATH_FUNC([fabs]) 326GCC_CHECK_MATH_FUNC([fabsl]) 327GCC_CHECK_MATH_FUNC([cabsf]) 328GCC_CHECK_MATH_FUNC([cabs]) 329GCC_CHECK_MATH_FUNC([cabsl]) 330GCC_CHECK_MATH_FUNC([floorf]) 331GCC_CHECK_MATH_FUNC([floor]) 332GCC_CHECK_MATH_FUNC([floorl]) 333GCC_CHECK_MATH_FUNC([fmodf]) 334GCC_CHECK_MATH_FUNC([fmod]) 335GCC_CHECK_MATH_FUNC([fmodl]) 336GCC_CHECK_MATH_FUNC([frexpf]) 337GCC_CHECK_MATH_FUNC([frexp]) 338GCC_CHECK_MATH_FUNC([frexpl]) 339GCC_CHECK_MATH_FUNC([hypotf]) 340GCC_CHECK_MATH_FUNC([hypot]) 341GCC_CHECK_MATH_FUNC([hypotl]) 342GCC_CHECK_MATH_FUNC([ldexpf]) 343GCC_CHECK_MATH_FUNC([ldexp]) 344GCC_CHECK_MATH_FUNC([ldexpl]) 345GCC_CHECK_MATH_FUNC([logf]) 346GCC_CHECK_MATH_FUNC([log]) 347GCC_CHECK_MATH_FUNC([logl]) 348GCC_CHECK_MATH_FUNC([clogf]) 349GCC_CHECK_MATH_FUNC([clog]) 350GCC_CHECK_MATH_FUNC([clogl]) 351GCC_CHECK_MATH_FUNC([log10f]) 352GCC_CHECK_MATH_FUNC([log10]) 353GCC_CHECK_MATH_FUNC([log10l]) 354GCC_CHECK_MATH_FUNC([clog10f]) 355GCC_CHECK_MATH_FUNC([clog10]) 356GCC_CHECK_MATH_FUNC([clog10l]) 357GCC_CHECK_MATH_FUNC([nextafterf]) 358GCC_CHECK_MATH_FUNC([nextafter]) 359GCC_CHECK_MATH_FUNC([nextafterl]) 360GCC_CHECK_MATH_FUNC([powf]) 361GCC_CHECK_MATH_FUNC([pow]) 362GCC_CHECK_MATH_FUNC([powl]) 363GCC_CHECK_MATH_FUNC([cpowf]) 364GCC_CHECK_MATH_FUNC([cpow]) 365GCC_CHECK_MATH_FUNC([cpowl]) 366GCC_CHECK_MATH_FUNC([roundf]) 367GCC_CHECK_MATH_FUNC([round]) 368GCC_CHECK_MATH_FUNC([roundl]) 369GCC_CHECK_MATH_FUNC([lroundf]) 370GCC_CHECK_MATH_FUNC([lround]) 371GCC_CHECK_MATH_FUNC([lroundl]) 372GCC_CHECK_MATH_FUNC([llroundf]) 373GCC_CHECK_MATH_FUNC([llround]) 374GCC_CHECK_MATH_FUNC([llroundl]) 375GCC_CHECK_MATH_FUNC([scalbnf]) 376GCC_CHECK_MATH_FUNC([scalbn]) 377GCC_CHECK_MATH_FUNC([scalbnl]) 378GCC_CHECK_MATH_FUNC([sinf]) 379GCC_CHECK_MATH_FUNC([sin]) 380GCC_CHECK_MATH_FUNC([sinl]) 381GCC_CHECK_MATH_FUNC([csinf]) 382GCC_CHECK_MATH_FUNC([csin]) 383GCC_CHECK_MATH_FUNC([csinl]) 384GCC_CHECK_MATH_FUNC([sinhf]) 385GCC_CHECK_MATH_FUNC([sinh]) 386GCC_CHECK_MATH_FUNC([sinhl]) 387GCC_CHECK_MATH_FUNC([csinhf]) 388GCC_CHECK_MATH_FUNC([csinh]) 389GCC_CHECK_MATH_FUNC([csinhl]) 390GCC_CHECK_MATH_FUNC([sqrtf]) 391GCC_CHECK_MATH_FUNC([sqrt]) 392GCC_CHECK_MATH_FUNC([sqrtl]) 393GCC_CHECK_MATH_FUNC([csqrtf]) 394GCC_CHECK_MATH_FUNC([csqrt]) 395GCC_CHECK_MATH_FUNC([csqrtl]) 396GCC_CHECK_MATH_FUNC([tanf]) 397GCC_CHECK_MATH_FUNC([tan]) 398GCC_CHECK_MATH_FUNC([tanl]) 399GCC_CHECK_MATH_FUNC([ctanf]) 400GCC_CHECK_MATH_FUNC([ctan]) 401GCC_CHECK_MATH_FUNC([ctanl]) 402GCC_CHECK_MATH_FUNC([tanhf]) 403GCC_CHECK_MATH_FUNC([tanh]) 404GCC_CHECK_MATH_FUNC([tanhl]) 405GCC_CHECK_MATH_FUNC([ctanhf]) 406GCC_CHECK_MATH_FUNC([ctanh]) 407GCC_CHECK_MATH_FUNC([ctanhl]) 408GCC_CHECK_MATH_FUNC([truncf]) 409GCC_CHECK_MATH_FUNC([trunc]) 410GCC_CHECK_MATH_FUNC([truncl]) 411GCC_CHECK_MATH_FUNC([erff]) 412GCC_CHECK_MATH_FUNC([erf]) 413GCC_CHECK_MATH_FUNC([erfl]) 414GCC_CHECK_MATH_FUNC([erfcf]) 415GCC_CHECK_MATH_FUNC([erfc]) 416GCC_CHECK_MATH_FUNC([erfcl]) 417GCC_CHECK_MATH_FUNC([j0f]) 418GCC_CHECK_MATH_FUNC([j0]) 419GCC_CHECK_MATH_FUNC([j0l]) 420GCC_CHECK_MATH_FUNC([j1f]) 421GCC_CHECK_MATH_FUNC([j1]) 422GCC_CHECK_MATH_FUNC([j1l]) 423GCC_CHECK_MATH_FUNC([jnf]) 424GCC_CHECK_MATH_FUNC([jn]) 425GCC_CHECK_MATH_FUNC([jnl]) 426GCC_CHECK_MATH_FUNC([y0f]) 427GCC_CHECK_MATH_FUNC([y0]) 428GCC_CHECK_MATH_FUNC([y0l]) 429GCC_CHECK_MATH_FUNC([y1f]) 430GCC_CHECK_MATH_FUNC([y1]) 431GCC_CHECK_MATH_FUNC([y1l]) 432GCC_CHECK_MATH_FUNC([ynf]) 433GCC_CHECK_MATH_FUNC([yn]) 434GCC_CHECK_MATH_FUNC([ynl]) 435GCC_CHECK_MATH_FUNC([tgamma]) 436GCC_CHECK_MATH_FUNC([tgammaf]) 437GCC_CHECK_MATH_FUNC([tgammal]) 438GCC_CHECK_MATH_FUNC([lgamma]) 439GCC_CHECK_MATH_FUNC([lgammaf]) 440GCC_CHECK_MATH_FUNC([lgammal]) 441 442# Check for GFORTRAN_C99_1.1 funcs 443GCC_CHECK_MATH_FUNC([cacos]) 444GCC_CHECK_MATH_FUNC([cacosf]) 445GCC_CHECK_MATH_FUNC([cacosh]) 446GCC_CHECK_MATH_FUNC([cacoshf]) 447GCC_CHECK_MATH_FUNC([cacoshl]) 448GCC_CHECK_MATH_FUNC([cacosl]) 449GCC_CHECK_MATH_FUNC([casin]) 450GCC_CHECK_MATH_FUNC([casinf]) 451GCC_CHECK_MATH_FUNC([casinh]) 452GCC_CHECK_MATH_FUNC([casinhf]) 453GCC_CHECK_MATH_FUNC([casinhl]) 454GCC_CHECK_MATH_FUNC([casinl]) 455GCC_CHECK_MATH_FUNC([catan]) 456GCC_CHECK_MATH_FUNC([catanf]) 457GCC_CHECK_MATH_FUNC([catanh]) 458GCC_CHECK_MATH_FUNC([catanhf]) 459GCC_CHECK_MATH_FUNC([catanhl]) 460GCC_CHECK_MATH_FUNC([catanl]) 461 462# On AIX, clog is present in libm as __clog 463AC_CHECK_LIB([m],[__clog],[AC_DEFINE([HAVE_CLOG],[1],[libm includes clog])]) 464 465# Check whether the system has a working stat() 466LIBGFOR_CHECK_WORKING_STAT 467 468# Check whether __mingw_snprintf() is present 469LIBGFOR_CHECK_MINGW_SNPRINTF 470 471# Check whether libquadmath should be used 472AC_ARG_ENABLE(libquadmath-support, 473AS_HELP_STRING([--disable-libquadmath-support], 474 [disable libquadmath support for Fortran]), 475ENABLE_LIBQUADMATH_SUPPORT=$enableval, 476ENABLE_LIBQUADMATH_SUPPORT=yes) 477enable_libquadmath_support= 478if test "${ENABLE_LIBQUADMATH_SUPPORT}" = "no" ; then 479 enable_libquadmath_support=no 480fi 481 482# Check whether we have a __float128 type, depends on enable_libquadmath_support 483LIBGFOR_CHECK_FLOAT128 484 485# Check for GNU libc feenableexcept 486AC_CHECK_LIB([m],[feenableexcept],[have_feenableexcept=yes AC_DEFINE([HAVE_FEENABLEEXCEPT],[1],[libm includes feenableexcept])]) 487 488# At least for glibc, clock_gettime is in librt. But don't 489# pull that in if it still doesn't give us the function we want. This 490# test is copied from libgomp, and modified to not link in -lrt as 491# libgfortran calls clock_gettime via a weak reference if it's found 492# in librt. 493if test $ac_cv_func_clock_gettime = no; then 494 AC_CHECK_LIB(rt, clock_gettime, 495 [AC_DEFINE(HAVE_CLOCK_GETTIME_LIBRT, 1, 496 [Define to 1 if you have the `clock_gettime' function in librt.])]) 497fi 498 499# Check for SysV fpsetmask 500LIBGFOR_CHECK_FPSETMASK 501 502# Check for AIX fp_trap and fp_enable 503AC_CHECK_FUNC([fp_trap],[have_fp_trap=yes AC_DEFINE([HAVE_FP_TRAP],[1],[fp_trap is present])]) 504AC_CHECK_FUNC([fp_enable],[have_fp_enable=yes AC_DEFINE([HAVE_FP_ENABLE],[1],[fp_enable is present])]) 505 506# Runs configure.host to set up necessary host-dependent shell variables. 507# We then display a message about it, and propagate them through the 508# build chain. 509. ${srcdir}/configure.host 510AC_MSG_NOTICE([FPU dependent file will be ${fpu_host}.h]) 511FPU_HOST_HEADER=config/${fpu_host}.h 512AC_SUBST(FPU_HOST_HEADER) 513 514# Some targets require additional compiler options for IEEE compatibility. 515IEEE_FLAGS="${ieee_flags}" 516AC_SUBST(IEEE_FLAGS) 517 518 519# Check for POSIX getpwuid_r 520# 521# There are two versions of getpwuid_r, the POSIX one with 5 522# arguments, and another one with 4 arguments used by at least HP-UX 523# 10.2. 524if test "$ac_cv_func_getpwuid_r" = "yes"; then 525 AC_CACHE_CHECK([POSIX version of getpwuid_r with 5 arguments], libgfor_cv_posix_getpwuid_r, [ 526 AC_LINK_IFELSE([AC_LANG_PROGRAM([ 527#include <stdio.h> 528#include <sys/types.h> 529#include <pwd.h>], [ 530 getpwuid_r(0, NULL, NULL, 0, NULL); 531 ])], [libgfor_cv_posix_getpwuid_r="yes"], [libgfor_cv_posix_getpwuid_r="no"])]) 532fi 533if test "$libgfor_cv_posix_getpwuid_r" = "yes"; then 534 AC_DEFINE([HAVE_POSIX_GETPWUID_R], [1], [Define to 1 if we have POSIX getpwuid_r which takes 5 arguments.]) 535fi 536 537 538# Check out attribute support. 539LIBGFOR_CHECK_ATTRIBUTE_VISIBILITY 540LIBGFOR_CHECK_ATTRIBUTE_DLLEXPORT 541LIBGFOR_CHECK_ATTRIBUTE_ALIAS 542 543# Check out sync builtins support. 544LIBGFOR_CHECK_SYNC_FETCH_AND_ADD 545 546# Check out #pragma weak. 547LIBGFOR_GTHREAD_WEAK 548 549# Various other checks on target 550LIBGFOR_CHECK_UNLINK_OPEN_FILE 551 552# Check whether line terminator is LF or CRLF 553LIBGFOR_CHECK_CRLF 554 555# Check whether we have _Unwind_GetIPInfo for backtrace 556GCC_CHECK_UNWIND_GETIPINFO 557 558AC_CACHE_SAVE 559 560if test ${multilib} = yes; then 561 multilib_arg="--enable-multilib" 562else 563 multilib_arg= 564fi 565 566# Write our Makefile and spec file. 567AC_CONFIG_FILES([ 568Makefile 569libgfortran.spec 570]) 571AC_OUTPUT 572