1m4_include(../config/acx.m4) 2m4_include(../config/no-executables.m4) 3m4_include(../config/math.m4) 4m4_include(../config/ax_check_define.m4) 5m4_include(../config/enable.m4) 6m4_include(../config/cet.m4) 7 8dnl Check that we have a working GNU Fortran compiler 9AC_DEFUN([LIBGFOR_WORKING_GFORTRAN], [ 10AC_MSG_CHECKING([whether the GNU Fortran compiler is working]) 11AC_LANG_PUSH([Fortran]) 12AC_COMPILE_IFELSE([[ 13 program foo 14 real, parameter :: bar = sin (12.34 / 2.5) 15 end program foo]], 16 [AC_MSG_RESULT([yes])], 17 [AC_MSG_RESULT([no]) 18 AC_MSG_ERROR([GNU Fortran is not working; please report a bug in http://gcc.gnu.org/bugzilla, attaching $PWD/config.log]) 19 ]) 20AC_LANG_POP([Fortran]) 21]) 22 23 24sinclude(../libtool.m4) 25dnl The lines below arrange for aclocal not to bring an installed 26dnl libtool.m4 into aclocal.m4, while still arranging for automake to 27dnl add a definition of LIBTOOL to Makefile.in. 28ifelse(,,,[AC_SUBST(LIBTOOL) 29AC_DEFUN([AM_PROG_LIBTOOL]) 30AC_DEFUN([AC_LIBTOOL_DLOPEN]) 31AC_DEFUN([AC_PROG_LD]) 32]) 33 34dnl Check whether the target supports hidden visibility. 35AC_DEFUN([LIBGFOR_CHECK_ATTRIBUTE_VISIBILITY], [ 36 AC_CACHE_CHECK([whether the target supports hidden visibility], 37 libgfor_cv_have_attribute_visibility, [ 38 save_CFLAGS="$CFLAGS" 39 CFLAGS="$CFLAGS -Werror" 40 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[void __attribute__((visibility("hidden"))) foo(void) { }]], [])], 41 libgfor_cv_have_attribute_visibility=yes, 42 libgfor_cv_have_attribute_visibility=no) 43 CFLAGS="$save_CFLAGS"]) 44 if test $libgfor_cv_have_attribute_visibility = yes; then 45 AC_DEFINE(HAVE_ATTRIBUTE_VISIBILITY, 1, 46 [Define to 1 if the target supports __attribute__((visibility(...))).]) 47 fi]) 48 49dnl Check whether the target supports symbol aliases. 50AC_DEFUN([LIBGFOR_CHECK_ATTRIBUTE_ALIAS], [ 51 AC_CACHE_CHECK([whether the target supports symbol aliases], 52 libgfor_cv_have_attribute_alias, [ 53 AC_LINK_IFELSE([AC_LANG_PROGRAM([[ 54void foo(void) { } 55extern void bar(void) __attribute__((alias("foo")));]], 56 [[bar();]])], libgfor_cv_have_attribute_alias=yes, libgfor_cv_have_attribute_alias=no)]) 57 if test $libgfor_cv_have_attribute_alias = yes; then 58 AC_DEFINE(HAVE_ATTRIBUTE_ALIAS, 1, 59 [Define to 1 if the target supports __attribute__((alias(...))).]) 60 fi]) 61 62dnl Check whether the target supports __atomic_fetch_add. 63AC_DEFUN([LIBGFOR_CHECK_ATOMIC_FETCH_ADD], [ 64 AC_CACHE_CHECK([whether the target supports __atomic_fetch_add], 65 libgfor_cv_have_atomic_fetch_add, [ 66 AC_LINK_IFELSE([AC_LANG_PROGRAM([[int foovar = 0;]], [[ 67if (foovar <= 0) return __atomic_fetch_add (&foovar, 1, __ATOMIC_ACQ_REL); 68if (foovar > 10) return __atomic_add_fetch (&foovar, -1, __ATOMIC_ACQ_REL);]])], 69 libgfor_cv_have_atomic_fetch_add=yes, libgfor_cv_have_atomic_fetch_add=no)]) 70 if test $libgfor_cv_have_atomic_fetch_add = yes; then 71 AC_DEFINE(HAVE_ATOMIC_FETCH_ADD, 1, 72 [Define to 1 if the target supports __atomic_fetch_add]) 73 fi]) 74 75dnl Check for pragma weak. 76AC_DEFUN([LIBGFOR_GTHREAD_WEAK], [ 77 AC_CACHE_CHECK([whether pragma weak works], 78 libgfor_cv_have_pragma_weak, [ 79 gfor_save_CFLAGS="$CFLAGS" 80 CFLAGS="$CFLAGS -Wunknown-pragmas" 81 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ 82void foo (void); 83#pragma weak foo 84]], [[if (foo) foo ();]])], 85 libgfor_cv_have_pragma_weak=yes, libgfor_cv_have_pragma_weak=no)]) 86 if test $libgfor_cv_have_pragma_weak = yes; then 87 AC_DEFINE(SUPPORTS_WEAK, 1, 88 [Define to 1 if the target supports #pragma weak]) 89 fi 90 case "$host" in 91 *-*-darwin* | *-*-hpux* | *-*-cygwin* | *-*-mingw* | *-*-musl* ) 92 AC_DEFINE(GTHREAD_USE_WEAK, 0, 93 [Define to 0 if the target shouldn't use #pragma weak]) 94 ;; 95 esac]) 96 97dnl Check whether target effectively supports weakref 98AC_DEFUN([LIBGFOR_CHECK_WEAKREF], [ 99 AC_CACHE_CHECK([whether the target supports weakref], 100 libgfor_cv_have_weakref, [ 101 save_CFLAGS="$CFLAGS" 102 CFLAGS="$CFLAGS -Wunknown-pragmas -Werror" 103 AC_LINK_IFELSE([AC_LANG_PROGRAM([[ 104static int mytoto (int) __attribute__((__weakref__("toto"))); 105]], [[return (mytoto != 0);]])], 106 libgfor_cv_have_weakref=yes, libgfor_cv_have_weakref=no) 107 CFLAGS="$save_CFLAGS"]) 108 if test $libgfor_cv_have_weakref = yes; then 109 AC_DEFINE(SUPPORTS_WEAKREF, 1, 110 [Define to 1 if the target supports weakref]) 111 fi]) 112 113dnl Check whether target can unlink a file still open. 114AC_DEFUN([LIBGFOR_CHECK_UNLINK_OPEN_FILE], [ 115 AC_CACHE_CHECK([whether the target can unlink an open file], 116 libgfor_cv_have_unlink_open_file, [ 117 AC_RUN_IFELSE([AC_LANG_SOURCE([[ 118#include <errno.h> 119#include <fcntl.h> 120#include <unistd.h> 121#include <sys/stat.h> 122 123int main () 124{ 125 int fd; 126 127 fd = open ("testfile", O_RDWR | O_CREAT, S_IWUSR | S_IRUSR); 128 if (fd <= 0) 129 return 0; 130 if (unlink ("testfile") == -1) 131 return 1; 132 write (fd, "This is a test\n", 15); 133 close (fd); 134 135 if (open ("testfile", O_RDONLY) == -1 && errno == ENOENT) 136 return 0; 137 else 138 return 1; 139}]])], libgfor_cv_have_unlink_open_file=yes, libgfor_cv_have_unlink_open_file=no, [ 140case "${target}" in 141 *mingw*) libgfor_cv_have_unlink_open_file=no ;; 142 *) libgfor_cv_have_unlink_open_file=yes;; 143esac])]) 144if test x"$libgfor_cv_have_unlink_open_file" = xyes; then 145 AC_DEFINE(HAVE_UNLINK_OPEN_FILE, 1, [Define if target can unlink open files.]) 146fi]) 147 148dnl Check whether CRLF is the line terminator 149AC_DEFUN([LIBGFOR_CHECK_CRLF], [ 150 AC_CACHE_CHECK([whether the target has CRLF as line terminator], 151 libgfor_cv_have_crlf, [ 152 AC_RUN_IFELSE([AC_LANG_SOURCE([[ 153/* This test program should exit with status 0 if system uses a CRLF as 154 line terminator, and status 1 otherwise. 155 Since it is used to check for mingw systems, and should return 0 in any 156 other case, in case of a failure we will not use CRLF. */ 157#include <sys/stat.h> 158#include <stdlib.h> 159#include <fcntl.h> 160#include <stdio.h> 161 162int main () 163{ 164#ifndef O_BINARY 165 exit(1); 166#else 167 int fd, bytes; 168 char buff[5]; 169 170 fd = open ("foo", O_WRONLY | O_CREAT | O_TRUNC, S_IRWXU); 171 if (fd < 0) 172 exit(1); 173 if (write (fd, "\n", 1) < 0) 174 perror ("write"); 175 176 close (fd); 177 178 if ((fd = open ("foo", O_RDONLY | O_BINARY, S_IRWXU)) < 0) 179 exit(1); 180 bytes = read (fd, buff, 5); 181 if (bytes == 2 && buff[0] == '\r' && buff[1] == '\n') 182 exit(0); 183 else 184 exit(1); 185#endif 186}]])], libgfor_cv_have_crlf=yes, libgfor_cv_have_crlf=no, [ 187case "${target}" in 188 *mingw*) libgfor_cv_have_crlf=yes ;; 189 *) libgfor_cv_have_crlf=no;; 190esac])]) 191if test x"$libgfor_cv_have_crlf" = xyes; then 192 AC_DEFINE(HAVE_CRLF, 1, [Define if CRLF is line terminator.]) 193fi]) 194 195dnl Check whether the st_ino and st_dev stat fields taken together uniquely 196dnl identify the file within the system. This is should be true for POSIX 197dnl systems; it is known to be false on mingw32. 198AC_DEFUN([LIBGFOR_CHECK_WORKING_STAT], [ 199 AC_CACHE_CHECK([whether the target stat is reliable], 200 libgfor_cv_have_working_stat, [ 201 AC_RUN_IFELSE([AC_LANG_SOURCE([[ 202#include <stdio.h> 203#include <sys/types.h> 204#include <sys/stat.h> 205#include <unistd.h> 206 207int main () 208{ 209 FILE *f, *g; 210 struct stat st1, st2; 211 212 f = fopen ("foo", "w"); 213 g = fopen ("bar", "w"); 214 if (stat ("foo", &st1) != 0 || stat ("bar", &st2)) 215 return 1; 216 if (st1.st_dev == st2.st_dev && st1.st_ino == st2.st_ino) 217 return 1; 218 fclose(f); 219 fclose(g); 220 return 0; 221}]])], libgfor_cv_have_working_stat=yes, libgfor_cv_have_working_stat=no, [ 222case "${target}" in 223 *mingw*) libgfor_cv_have_working_stat=no ;; 224 *) libgfor_cv_have_working_stat=yes;; 225esac])]) 226if test x"$libgfor_cv_have_working_stat" = xyes; then 227 AC_DEFINE(HAVE_WORKING_STAT, 1, [Define if target has a reliable stat.]) 228fi]) 229 230dnl Checks for fpsetmask function. 231AC_DEFUN([LIBGFOR_CHECK_FPSETMASK], [ 232 AC_CACHE_CHECK([whether fpsetmask is present], libgfor_cv_have_fpsetmask, [ 233 AC_LINK_IFELSE([AC_LANG_PROGRAM([[ 234#if HAVE_FLOATINGPOINT_H 235# include <floatingpoint.h> 236#endif /* HAVE_FLOATINGPOINT_H */ 237#if HAVE_IEEEFP_H 238# include <ieeefp.h> 239#endif /* HAVE_IEEEFP_H */]],[[fpsetmask(0);]])], 240 eval "libgfor_cv_have_fpsetmask=yes", eval "libgfor_cv_have_fpsetmask=no") 241 ]) 242 if test x"$libgfor_cv_have_fpsetmask" = xyes; then 243 have_fpsetmask=yes 244 AC_DEFINE(HAVE_FPSETMASK, 1, [Define if you have fpsetmask.]) 245 fi 246]) 247 248dnl Check whether we have a mingw that provides a __mingw_snprintf function 249AC_DEFUN([LIBGFOR_CHECK_MINGW_SNPRINTF], [ 250 AC_CACHE_CHECK([whether __mingw_snprintf is present], libgfor_cv_have_mingw_snprintf, [ 251 AC_LINK_IFELSE([AC_LANG_PROGRAM([[ 252#include <stdio.h> 253extern int __mingw_snprintf (char *, size_t, const char *, ...); 254]],[[ 255__mingw_snprintf (NULL, 0, "%d\n", 1); 256]])], 257 eval "libgfor_cv_have_mingw_snprintf=yes", eval "libgfor_cv_have_mingw_snprintf=no") 258 ]) 259 if test x"$libgfor_cv_have_mingw_snprintf" = xyes; then 260 AC_DEFINE(HAVE_MINGW_SNPRINTF, 1, [Define if you have __mingw_snprintf.]) 261 fi 262]) 263 264dnl Check whether we have a __float128 type 265AC_DEFUN([LIBGFOR_CHECK_FLOAT128], [ 266 LIBQUADSPEC= 267 268 if test "x$enable_libquadmath_support" != xno; then 269 270 AC_CACHE_CHECK([whether we have a usable __float128 type], 271 libgfor_cv_have_float128, [ 272 GCC_TRY_COMPILE_OR_LINK([ 273 typedef _Complex float __attribute__((mode(TC))) __complex128; 274 275 __float128 foo (__float128 x) 276 { 277 278 __complex128 z1, z2; 279 280 z1 = x; 281 z2 = x / 7.Q; 282 z2 /= z1; 283 284 return (__float128) z2; 285 } 286 287 __float128 bar (__float128 x) 288 { 289 return x * __builtin_huge_valq (); 290 } 291 ],[ 292 foo (1.2Q); 293 bar (1.2Q); 294 ],[ 295 libgfor_cv_have_float128=yes 296 ],[ 297 libgfor_cv_have_float128=no 298])]) 299 300 if test "x$libgfor_cv_have_float128" = xyes; then 301 AC_DEFINE(HAVE_FLOAT128, 1, [Define if have a usable __float128 type.]) 302 303 dnl Check whether -Wl,--as-needed resp. -Wl,-zignore is supported 304 dnl 305 dnl Turn warnings into error to avoid testsuite breakage. So enable 306 dnl AC_LANG_WERROR, but there's currently (autoconf 2.64) no way to turn 307 dnl it off again. As a workaround, save and restore werror flag like 308 dnl AC_PATH_XTRA. 309 dnl Cf. http://gcc.gnu.org/ml/gcc-patches/2010-05/msg01889.html 310 ac_xsave_[]_AC_LANG_ABBREV[]_werror_flag=$ac_[]_AC_LANG_ABBREV[]_werror_flag 311 AC_CACHE_CHECK([whether --as-needed/-z ignore works], 312 [libgfor_cv_have_as_needed], 313 [ 314 # Test for native Solaris options first. 315 # No whitespace after -z to pass it through -Wl. 316 libgfor_cv_as_needed_option="-zignore" 317 libgfor_cv_no_as_needed_option="-zrecord" 318 save_LDFLAGS="$LDFLAGS" 319 LDFLAGS="$LDFLAGS -Wl,$libgfor_cv_as_needed_option -lm -Wl,$libgfor_cv_no_as_needed_option" 320 libgfor_cv_have_as_needed=no 321 AC_LANG_WERROR 322 AC_LINK_IFELSE([AC_LANG_PROGRAM([])], 323 [libgfor_cv_have_as_needed=yes], 324 [libgfor_cv_have_as_needed=no]) 325 LDFLAGS="$save_LDFLAGS" 326 if test "x$libgfor_cv_have_as_needed" = xno; then 327 libgfor_cv_as_needed_option="--as-needed" 328 libgfor_cv_no_as_needed_option="--no-as-needed" 329 save_LDFLAGS="$LDFLAGS" 330 LDFLAGS="$LDFLAGS -Wl,$libgfor_cv_as_needed_option -lm -Wl,$libgfor_cv_no_as_needed_option" 331 libgfor_cv_have_as_needed=no 332 AC_LANG_WERROR 333 AC_LINK_IFELSE([AC_LANG_PROGRAM([])], 334 [libgfor_cv_have_as_needed=yes], 335 [libgfor_cv_have_as_needed=no]) 336 LDFLAGS="$save_LDFLAGS" 337 fi 338 ac_[]_AC_LANG_ABBREV[]_werror_flag=$ac_xsave_[]_AC_LANG_ABBREV[]_werror_flag 339 ]) 340 341 dnl For static libgfortran linkage, depend on libquadmath only if needed. 342 if test "x$libgfor_cv_have_as_needed" = xyes; then 343 LIBQUADSPEC="%{static-libgfortran:$libgfor_cv_as_needed_option} -lquadmath %{static-libgfortran:$libgfor_cv_no_as_needed_option}" 344 else 345 LIBQUADSPEC="-lquadmath" 346 fi 347 if test -f ../libquadmath/libquadmath.la; then 348 LIBQUADLIB=../libquadmath/libquadmath.la 349 LIBQUADLIB_DEP=../libquadmath/libquadmath.la 350 LIBQUADINCLUDE='-I$(srcdir)/../libquadmath' 351 else 352 LIBQUADLIB="-lquadmath" 353 LIBQUADLIB_DEP= 354 LIBQUADINCLUDE= 355 fi 356 fi 357 else 358 # for --disable-quadmath 359 LIBQUADLIB= 360 LIBQUADLIB_DEP= 361 LIBQUADINCLUDE= 362 fi 363 364 dnl For the spec file 365 AC_SUBST(LIBQUADSPEC) 366 AC_SUBST(LIBQUADLIB) 367 AC_SUBST(LIBQUADLIB_DEP) 368 AC_SUBST(LIBQUADINCLUDE) 369 370 dnl We need a conditional for the Makefile 371 AM_CONDITIONAL(LIBGFOR_BUILD_QUAD, [test "x$libgfor_cv_have_float128" = xyes]) 372]) 373 374 375dnl Check whether we have strerror_r 376AC_DEFUN([LIBGFOR_CHECK_STRERROR_R], [ 377 dnl Check for three-argument POSIX version of strerror_r 378 ac_save_CFLAGS="$CFLAGS" 379 CFLAGS="-Wimplicit-function-declaration -Werror" 380 AC_TRY_COMPILE([#define _GNU_SOURCE 1 381 #include <string.h> 382 #include <locale.h>], 383 [char s[128]; strerror_r(5, s, 128);], 384 AC_DEFINE(HAVE_STRERROR_R, 1, 385 [Define if strerror_r is available in <string.h>.]),) 386 CFLAGS="$ac_save_CFLAGS" 387 388 dnl Check for two-argument version of strerror_r (e.g. for VxWorks) 389 ac_save_CFLAGS="$CFLAGS" 390 CFLAGS="-Wimplicit-function-declaration -Werror" 391 AC_TRY_COMPILE([#define _GNU_SOURCE 1 392 #include <string.h> 393 #include <locale.h>], 394 [char s[128]; strerror_r(5, s);], 395 AC_DEFINE(HAVE_STRERROR_R_2ARGS, 1, 396 [Define if strerror_r takes two arguments and is available in <string.h>.]),) 397 CFLAGS="$ac_save_CFLAGS" 398]) 399 400dnl Check for AVX 401 402AC_DEFUN([LIBGFOR_CHECK_AVX], [ 403 ac_save_CFLAGS="$CFLAGS" 404 CFLAGS="-O2 -mavx" 405 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ 406 void _mm256_zeroall (void) 407 { 408 __builtin_ia32_vzeroall (); 409 }]], [[]])], 410 AC_DEFINE(HAVE_AVX, 1, 411 [Define if AVX instructions can be compiled.]), 412 []) 413 CFLAGS="$ac_save_CFLAGS" 414]) 415 416dnl Check for AVX2 417 418AC_DEFUN([LIBGFOR_CHECK_AVX2], [ 419 ac_save_CFLAGS="$CFLAGS" 420 CFLAGS="-O2 -mavx2" 421 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ 422 typedef long long __v4di __attribute__ ((__vector_size__ (32))); 423 __v4di 424 mm256_is32_andnotsi256 (__v4di __X, __v4di __Y) 425 { 426 return __builtin_ia32_andnotsi256 (__X, __Y); 427 }]], [[]])], 428 AC_DEFINE(HAVE_AVX2, 1, 429 [Define if AVX2 instructions can be compiled.]), 430 []) 431 CFLAGS="$ac_save_CFLAGS" 432]) 433 434dnl Check for AVX512f 435 436AC_DEFUN([LIBGFOR_CHECK_AVX512F], [ 437 ac_save_CFLAGS="$CFLAGS" 438 CFLAGS="-O2 -mavx512f" 439 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ 440 typedef double __m512d __attribute__ ((__vector_size__ (64))); 441 __m512d _mm512_add (__m512d a) 442 { 443 __m512d b = __builtin_ia32_addpd512_mask (a, a, a, 1, 4); 444 /* For -m64/-mx32 also verify that code will work even if 445 the target uses call saved zmm16+ and needs to emit 446 unwind info for them (e.g. on mingw). See PR79127. */ 447#ifdef __x86_64__ 448 asm volatile ("" : : : "zmm16", "zmm17", "zmm18", "zmm19"); 449#endif 450 return b; 451 }]], [[]])], 452 AC_DEFINE(HAVE_AVX512F, 1, 453 [Define if AVX512f instructions can be compiled.]), 454 []) 455 CFLAGS="$ac_save_CFLAGS" 456]) 457 458dnl Check for FMA3 459dnl 460AC_DEFUN([LIBGFOR_CHECK_FMA3], [ 461 ac_save_CFLAGS="$CFLAGS" 462 CFLAGS="-O2 -mfma -mno-fma4" 463 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ 464 typedef float __m128 __attribute__ ((__vector_size__ (16))); 465 typedef float __v4sf __attribute__ ((__vector_size__ (16))); 466 __m128 _mm_macc_ps(__m128 __A, __m128 __B, __m128 __C) 467 { 468 return (__m128) __builtin_ia32_vfmaddps ((__v4sf)__A, 469 (__v4sf)__B, 470 (__v4sf)__C); 471 }]], [[]])], 472 AC_DEFINE(HAVE_FMA3, 1, 473 [Define if FMA3 instructions can be compiled.]), 474 []) 475 CFLAGS="$ac_save_CFLAGS" 476]) 477 478dnl Check for FMA4 479dnl 480AC_DEFUN([LIBGFOR_CHECK_FMA4], [ 481 ac_save_CFLAGS="$CFLAGS" 482 CFLAGS="-O2 -mfma4 -mno-fma" 483 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ 484 typedef float __m128 __attribute__ ((__vector_size__ (16))); 485 typedef float __v4sf __attribute__ ((__vector_size__ (16))); 486 __m128 _mm_macc_ps(__m128 __A, __m128 __B, __m128 __C) 487 { 488 return (__m128) __builtin_ia32_vfmaddps ((__v4sf)__A, 489 (__v4sf)__B, 490 (__v4sf)__C); 491 }]], [[]])], 492 AC_DEFINE(HAVE_FMA4, 1, 493 [Define if FMA4 instructions can be compiled.]), 494 []) 495 CFLAGS="$ac_save_CFLAGS" 496]) 497 498dnl Check for -mprefer-avx128 499dnl This also defines an automake conditional. 500AC_DEFUN([LIBGFOR_CHECK_AVX128], [ 501 ac_save_CFLAGS="$CFLAGS" 502 CFLAGS="-O2 -mavx -mprefer-avx128" 503 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ 504 void foo() 505 { 506 }]], [[]])], 507 AC_DEFINE(HAVE_AVX128, 1, 508 [Define if -mprefer-avx128 is supported.]) 509 AM_CONDITIONAL([HAVE_AVX128],true), 510 [AM_CONDITIONAL([HAVE_AVX128],false)]) 511 CFLAGS="$ac_save_CFLAGS" 512]) 513