1m4_include(../config/acx.m4) 2m4_include(../config/no-executables.m4) 3m4_include(../config/math.m4) 4 5dnl Check that we have a working GNU Fortran compiler 6AC_DEFUN([LIBGFOR_WORKING_GFORTRAN], [ 7AC_MSG_CHECKING([whether the GNU Fortran compiler is working]) 8AC_LANG_PUSH([Fortran]) 9AC_COMPILE_IFELSE([[ 10 program foo 11 real, parameter :: bar = sin (12.34 / 2.5) 12 end program foo]], 13 [AC_MSG_RESULT([yes])], 14 [AC_MSG_RESULT([no]) 15 AC_MSG_ERROR([GNU Fortran is not working; please report a bug in http://gcc.gnu.org/bugzilla, attaching $PWD/config.log]) 16 ]) 17AC_LANG_POP([Fortran]) 18]) 19 20 21sinclude(../libtool.m4) 22dnl The lines below arrange for aclocal not to bring an installed 23dnl libtool.m4 into aclocal.m4, while still arranging for automake to 24dnl add a definition of LIBTOOL to Makefile.in. 25ifelse(,,,[AC_SUBST(LIBTOOL) 26AC_DEFUN([AM_PROG_LIBTOOL]) 27AC_DEFUN([AC_LIBTOOL_DLOPEN]) 28AC_DEFUN([AC_PROG_LD]) 29]) 30 31dnl Check whether the target supports hidden visibility. 32AC_DEFUN([LIBGFOR_CHECK_ATTRIBUTE_VISIBILITY], [ 33 AC_CACHE_CHECK([whether the target supports hidden visibility], 34 libgfor_cv_have_attribute_visibility, [ 35 save_CFLAGS="$CFLAGS" 36 CFLAGS="$CFLAGS -Werror" 37 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[void __attribute__((visibility("hidden"))) foo(void) { }]], [])], 38 libgfor_cv_have_attribute_visibility=yes, 39 libgfor_cv_have_attribute_visibility=no) 40 CFLAGS="$save_CFLAGS"]) 41 if test $libgfor_cv_have_attribute_visibility = yes; then 42 AC_DEFINE(HAVE_ATTRIBUTE_VISIBILITY, 1, 43 [Define to 1 if the target supports __attribute__((visibility(...))).]) 44 fi]) 45 46dnl Check whether the target supports dllexport 47AC_DEFUN([LIBGFOR_CHECK_ATTRIBUTE_DLLEXPORT], [ 48 AC_CACHE_CHECK([whether the target supports dllexport], 49 libgfor_cv_have_attribute_dllexport, [ 50 save_CFLAGS="$CFLAGS" 51 CFLAGS="$CFLAGS -Werror" 52 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[void __attribute__((dllexport)) foo(void) { }]], [])], 53 libgfor_cv_have_attribute_dllexport=yes, 54 libgfor_cv_have_attribute_dllexport=no) 55 CFLAGS="$save_CFLAGS"]) 56 if test $libgfor_cv_have_attribute_dllexport = yes; then 57 AC_DEFINE(HAVE_ATTRIBUTE_DLLEXPORT, 1, 58 [Define to 1 if the target supports __attribute__((dllexport)).]) 59 fi]) 60 61dnl Check whether the target supports symbol aliases. 62AC_DEFUN([LIBGFOR_CHECK_ATTRIBUTE_ALIAS], [ 63 AC_CACHE_CHECK([whether the target supports symbol aliases], 64 libgfor_cv_have_attribute_alias, [ 65 AC_LINK_IFELSE([AC_LANG_PROGRAM([[ 66void foo(void) { } 67extern void bar(void) __attribute__((alias("foo")));]], 68 [[bar();]])], libgfor_cv_have_attribute_alias=yes, libgfor_cv_have_attribute_alias=no)]) 69 if test $libgfor_cv_have_attribute_alias = yes; then 70 AC_DEFINE(HAVE_ATTRIBUTE_ALIAS, 1, 71 [Define to 1 if the target supports __attribute__((alias(...))).]) 72 fi]) 73 74dnl Check whether the target supports __sync_fetch_and_add. 75AC_DEFUN([LIBGFOR_CHECK_SYNC_FETCH_AND_ADD], [ 76 AC_CACHE_CHECK([whether the target supports __sync_fetch_and_add], 77 libgfor_cv_have_sync_fetch_and_add, [ 78 AC_LINK_IFELSE([AC_LANG_PROGRAM([[int foovar = 0;]], [[ 79if (foovar <= 0) return __sync_fetch_and_add (&foovar, 1); 80if (foovar > 10) return __sync_add_and_fetch (&foovar, -1);]])], 81 libgfor_cv_have_sync_fetch_and_add=yes, libgfor_cv_have_sync_fetch_and_add=no)]) 82 if test $libgfor_cv_have_sync_fetch_and_add = yes; then 83 AC_DEFINE(HAVE_SYNC_FETCH_AND_ADD, 1, 84 [Define to 1 if the target supports __sync_fetch_and_add]) 85 fi]) 86 87dnl Check for pragma weak. 88AC_DEFUN([LIBGFOR_GTHREAD_WEAK], [ 89 AC_CACHE_CHECK([whether pragma weak works], 90 libgfor_cv_have_pragma_weak, [ 91 gfor_save_CFLAGS="$CFLAGS" 92 CFLAGS="$CFLAGS -Wunknown-pragmas" 93 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ 94void foo (void); 95#pragma weak foo 96]], [[if (foo) foo ();]])], 97 libgfor_cv_have_pragma_weak=yes, libgfor_cv_have_pragma_weak=no)]) 98 if test $libgfor_cv_have_pragma_weak = yes; then 99 AC_DEFINE(SUPPORTS_WEAK, 1, 100 [Define to 1 if the target supports #pragma weak]) 101 fi 102 case "$host" in 103 *-*-darwin* | *-*-hpux* | *-*-cygwin* | *-*-mingw* ) 104 AC_DEFINE(GTHREAD_USE_WEAK, 0, 105 [Define to 0 if the target shouldn't use #pragma weak]) 106 ;; 107 esac]) 108 109dnl Check whether target can unlink a file still open. 110AC_DEFUN([LIBGFOR_CHECK_UNLINK_OPEN_FILE], [ 111 AC_CACHE_CHECK([whether the target can unlink an open file], 112 libgfor_cv_have_unlink_open_file, [ 113 AC_RUN_IFELSE([AC_LANG_SOURCE([[ 114#include <errno.h> 115#include <fcntl.h> 116#include <unistd.h> 117#include <sys/stat.h> 118 119int main () 120{ 121 int fd; 122 123 fd = open ("testfile", O_RDWR | O_CREAT, S_IWUSR | S_IRUSR); 124 if (fd <= 0) 125 return 0; 126 if (unlink ("testfile") == -1) 127 return 1; 128 write (fd, "This is a test\n", 15); 129 close (fd); 130 131 if (open ("testfile", O_RDONLY) == -1 && errno == ENOENT) 132 return 0; 133 else 134 return 1; 135}]])], libgfor_cv_have_unlink_open_file=yes, libgfor_cv_have_unlink_open_file=no, [ 136case "${target}" in 137 *mingw*) libgfor_cv_have_unlink_open_file=no ;; 138 *) libgfor_cv_have_unlink_open_file=yes;; 139esac])]) 140if test x"$libgfor_cv_have_unlink_open_file" = xyes; then 141 AC_DEFINE(HAVE_UNLINK_OPEN_FILE, 1, [Define if target can unlink open files.]) 142fi]) 143 144dnl Check whether CRLF is the line terminator 145AC_DEFUN([LIBGFOR_CHECK_CRLF], [ 146 AC_CACHE_CHECK([whether the target has CRLF as line terminator], 147 libgfor_cv_have_crlf, [ 148 AC_RUN_IFELSE([AC_LANG_SOURCE([[ 149/* This test program should exit with status 0 if system uses a CRLF as 150 line terminator, and status 1 otherwise. 151 Since it is used to check for mingw systems, and should return 0 in any 152 other case, in case of a failure we will not use CRLF. */ 153#include <sys/stat.h> 154#include <stdlib.h> 155#include <fcntl.h> 156#include <stdio.h> 157 158int main () 159{ 160#ifndef O_BINARY 161 exit(1); 162#else 163 int fd, bytes; 164 char buff[5]; 165 166 fd = open ("foo", O_WRONLY | O_CREAT | O_TRUNC, S_IRWXU); 167 if (fd < 0) 168 exit(1); 169 if (write (fd, "\n", 1) < 0) 170 perror ("write"); 171 172 close (fd); 173 174 if ((fd = open ("foo", O_RDONLY | O_BINARY, S_IRWXU)) < 0) 175 exit(1); 176 bytes = read (fd, buff, 5); 177 if (bytes == 2 && buff[0] == '\r' && buff[1] == '\n') 178 exit(0); 179 else 180 exit(1); 181#endif 182}]])], libgfor_cv_have_crlf=yes, libgfor_cv_have_crlf=no, [ 183case "${target}" in 184 *mingw*) libgfor_cv_have_crlf=yes ;; 185 *) libgfor_cv_have_crlf=no;; 186esac])]) 187if test x"$libgfor_cv_have_crlf" = xyes; then 188 AC_DEFINE(HAVE_CRLF, 1, [Define if CRLF is line terminator.]) 189fi]) 190 191dnl Check whether the st_ino and st_dev stat fields taken together uniquely 192dnl identify the file within the system. This is should be true for POSIX 193dnl systems; it is known to be false on mingw32. 194AC_DEFUN([LIBGFOR_CHECK_WORKING_STAT], [ 195 AC_CACHE_CHECK([whether the target stat is reliable], 196 libgfor_cv_have_working_stat, [ 197 AC_RUN_IFELSE([AC_LANG_SOURCE([[ 198#include <stdio.h> 199#include <sys/types.h> 200#include <sys/stat.h> 201#include <unistd.h> 202 203int main () 204{ 205 FILE *f, *g; 206 struct stat st1, st2; 207 208 f = fopen ("foo", "w"); 209 g = fopen ("bar", "w"); 210 if (stat ("foo", &st1) != 0 || stat ("bar", &st2)) 211 return 1; 212 if (st1.st_dev == st2.st_dev && st1.st_ino == st2.st_ino) 213 return 1; 214 fclose(f); 215 fclose(g); 216 return 0; 217}]])], libgfor_cv_have_working_stat=yes, libgfor_cv_have_working_stat=no, [ 218case "${target}" in 219 *mingw*) libgfor_cv_have_working_stat=no ;; 220 *) libgfor_cv_have_working_stat=yes;; 221esac])]) 222if test x"$libgfor_cv_have_working_stat" = xyes; then 223 AC_DEFINE(HAVE_WORKING_STAT, 1, [Define if target has a reliable stat.]) 224fi]) 225 226dnl Checks for fpsetmask function. 227AC_DEFUN([LIBGFOR_CHECK_FPSETMASK], [ 228 AC_CACHE_CHECK([whether fpsetmask is present], libgfor_cv_have_fpsetmask, [ 229 AC_LINK_IFELSE([AC_LANG_PROGRAM([[ 230#if HAVE_FLOATINGPOINT_H 231# include <floatingpoint.h> 232#endif /* HAVE_FLOATINGPOINT_H */ 233#if HAVE_IEEEFP_H 234# include <ieeefp.h> 235#endif /* HAVE_IEEEFP_H */]],[[fpsetmask(0);]])], 236 eval "libgfor_cv_have_fpsetmask=yes", eval "libgfor_cv_have_fpsetmask=no") 237 ]) 238 if test x"$libgfor_cv_have_fpsetmask" = xyes; then 239 have_fpsetmask=yes 240 AC_DEFINE(HAVE_FPSETMASK, 1, [Define if you have fpsetmask.]) 241 fi 242]) 243 244dnl Check whether we have a mingw that provides a __mingw_snprintf function 245AC_DEFUN([LIBGFOR_CHECK_MINGW_SNPRINTF], [ 246 AC_CACHE_CHECK([whether __mingw_snprintf is present], libgfor_cv_have_mingw_snprintf, [ 247 AC_LINK_IFELSE([AC_LANG_PROGRAM([[ 248#include <stdio.h> 249extern int __mingw_snprintf (char *, size_t, const char *, ...); 250]],[[ 251__mingw_snprintf (NULL, 0, "%d\n", 1); 252]])], 253 eval "libgfor_cv_have_mingw_snprintf=yes", eval "libgfor_cv_have_mingw_snprintf=no") 254 ]) 255 if test x"$libgfor_cv_have_mingw_snprintf" = xyes; then 256 AC_DEFINE(HAVE_MINGW_SNPRINTF, 1, [Define if you have __mingw_snprintf.]) 257 fi 258]) 259 260dnl Check whether we have a __float128 type 261AC_DEFUN([LIBGFOR_CHECK_FLOAT128], [ 262 LIBQUADSPEC= 263 264 if test "x$enable_libquadmath_support" != xno; then 265 266 AC_CACHE_CHECK([whether we have a usable __float128 type], 267 libgfor_cv_have_float128, [ 268 GCC_TRY_COMPILE_OR_LINK([ 269 typedef _Complex float __attribute__((mode(TC))) __complex128; 270 271 __float128 foo (__float128 x) 272 { 273 274 __complex128 z1, z2; 275 276 z1 = x; 277 z2 = x / 7.Q; 278 z2 /= z1; 279 280 return (__float128) z2; 281 } 282 283 __float128 bar (__float128 x) 284 { 285 return x * __builtin_huge_valq (); 286 } 287 ],[ 288 foo (1.2Q); 289 bar (1.2Q); 290 ],[ 291 libgfor_cv_have_float128=yes 292 ],[ 293 libgfor_cv_have_float128=no 294])]) 295 296 if test "x$libgfor_cv_have_float128" = xyes; then 297 AC_DEFINE(HAVE_FLOAT128, 1, [Define if have a usable __float128 type.]) 298 299 dnl Check whether -Wl,--as-needed is supported 300 dnl 301 dnl Turn warnings into error to avoid testsuite breakage. So enable 302 dnl AC_LANG_WERROR, but there's currently (autoconf 2.64) no way to turn 303 dnl it off again. As a workaround, save and restore werror flag like 304 dnl AC_PATH_XTRA. 305 dnl Cf. http://gcc.gnu.org/ml/gcc-patches/2010-05/msg01889.html 306 ac_xsave_[]_AC_LANG_ABBREV[]_werror_flag=$ac_[]_AC_LANG_ABBREV[]_werror_flag 307 AC_CACHE_CHECK([whether --as-needed works], 308 [libgfor_cv_have_as_needed], 309 [ 310 save_LDFLAGS="$LDFLAGS" 311 LDFLAGS="$LDFLAGS -Wl,--as-needed -lm -Wl,--no-as-needed" 312 libgfor_cv_have_as_needed=no 313 AC_LANG_WERROR 314 AC_LINK_IFELSE([AC_LANG_PROGRAM([])], 315 [libgfor_cv_have_as_needed=yes], 316 [libgfor_cv_have_as_needed=no]) 317 LDFLAGS="$save_LDFLAGS" 318 ac_[]_AC_LANG_ABBREV[]_werror_flag=$ac_xsave_[]_AC_LANG_ABBREV[]_werror_flag 319 ]) 320 321 dnl For static libgfortran linkage, depend on libquadmath only if needed. 322 if test "x$libgfor_cv_have_as_needed" = xyes; then 323 LIBQUADSPEC="%{static-libgfortran:--as-needed} -lquadmath %{static-libgfortran:--no-as-needed}" 324 else 325 LIBQUADSPEC="-lquadmath" 326 fi 327 if test -f ../libquadmath/libquadmath.la; then 328 LIBQUADLIB=../libquadmath/libquadmath.la 329 LIBQUADLIB_DEP=../libquadmath/libquadmath.la 330 LIBQUADINCLUDE='-I$(srcdir)/../libquadmath' 331 else 332 LIBQUADLIB="-lquadmath" 333 LIBQUADLIB_DEP= 334 LIBQUADINCLUDE= 335 fi 336 fi 337 else 338 # for --disable-quadmath 339 LIBQUADLIB= 340 LIBQUADLIB_DEP= 341 LIBQUADINCLUDE= 342 fi 343 344 dnl For the spec file 345 AC_SUBST(LIBQUADSPEC) 346 AC_SUBST(LIBQUADLIB) 347 AC_SUBST(LIBQUADLIB_DEP) 348 AC_SUBST(LIBQUADINCLUDE) 349 350 dnl We need a conditional for the Makefile 351 AM_CONDITIONAL(LIBGFOR_BUILD_QUAD, [test "x$libgfor_cv_have_float128" = xyes]) 352]) 353 354 355dnl Check whether we have strerror_r 356AC_DEFUN([LIBGFOR_CHECK_STRERROR_R], [ 357 dnl Check for three-argument POSIX version of strerror_r 358 ac_save_CFLAGS="$CFLAGS" 359 CFLAGS="-Wimplicit-function-declaration -Werror" 360 AC_TRY_COMPILE([#define _GNU_SOURCE 1 361 #include <string.h> 362 #include <locale.h>], 363 [char s[128]; strerror_r(5, s, 128);], 364 AC_DEFINE(HAVE_STRERROR_R, 1, 365 [Define if strerror_r is available in <string.h>.]),) 366 CFLAGS="$ac_save_CFLAGS" 367 368 dnl Check for two-argument version of strerror_r (e.g. for VxWorks) 369 ac_save_CFLAGS="$CFLAGS" 370 CFLAGS="-Wimplicit-function-declaration -Werror" 371 AC_TRY_COMPILE([#define _GNU_SOURCE 1 372 #include <string.h> 373 #include <locale.h>], 374 [char s[128]; strerror_r(5, s);], 375 AC_DEFINE(HAVE_STRERROR_R_2ARGS, 1, 376 [Define if strerror_r takes two arguments and is available in <string.h>.]),) 377 CFLAGS="$ac_save_CFLAGS" 378]) 379