1 m4_include(../config/acx.m4)
2 m4_include(../config/no-executables.m4)
3 m4_include(../config/math.m4)
5 dnl Check that we have a working GNU Fortran compiler
6 AC_DEFUN([LIBGFOR_WORKING_GFORTRAN], [
7 AC_MSG_CHECKING([whether the GNU Fortran compiler is working])
8 AC_LANG_PUSH([Fortran])
11 real, parameter :: bar = sin (12.34 / 2.5)
13 [AC_MSG_RESULT([yes])],
15 AC_MSG_ERROR([GNU Fortran is not working; please report a bug in http://gcc.gnu.org/bugzilla, attaching $PWD/config.log])
17 AC_LANG_POP([Fortran])
21 sinclude(../libtool.m4)
22 dnl The lines below arrange for aclocal not to bring an installed
23 dnl libtool.m4 into aclocal.m4, while still arranging for automake to
24 dnl add a definition of LIBTOOL to Makefile.in.
25 ifelse(,,,[AC_SUBST(LIBTOOL)
26 AC_DEFUN([AM_PROG_LIBTOOL])
27 AC_DEFUN([AC_LIBTOOL_DLOPEN])
28 AC_DEFUN([AC_PROG_LD])
31 dnl Check whether the target supports hidden visibility.
32 AC_DEFUN([LIBGFOR_CHECK_ATTRIBUTE_VISIBILITY], [
33 AC_CACHE_CHECK([whether the target supports hidden visibility],
34 libgfor_cv_have_attribute_visibility, [
36 CFLAGS="$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 $libgfor_cv_have_attribute_visibility = yes; then
42 AC_DEFINE(HAVE_ATTRIBUTE_VISIBILITY, 1,
43 [Define to 1 if the target supports __attribute__((visibility(...))).])
46 dnl Check whether the target supports dllexport
47 AC_DEFUN([LIBGFOR_CHECK_ATTRIBUTE_DLLEXPORT], [
48 AC_CACHE_CHECK([whether the target supports dllexport],
49 libgfor_cv_have_attribute_dllexport, [
51 CFLAGS="$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)).])
61 dnl Check whether the target supports symbol aliases.
62 AC_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([[
67 extern 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(...))).])
74 dnl Check whether the target supports __sync_fetch_and_add.
75 AC_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;]], [[
79 if (foovar <= 0) return __sync_fetch_and_add (&foovar, 1);
80 if (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 $libgfor_cv_have_sync_fetch_and_add = yes; then
83 AC_DEFINE(HAVE_SYNC_FETCH_AND_ADD, 1,
84 [Define to 1 if the target supports __sync_fetch_and_add])
87 dnl Check for pragma weak.
88 AC_DEFUN([LIBGFOR_GTHREAD_WEAK], [
89 AC_CACHE_CHECK([whether pragma weak works],
90 libgfor_cv_have_pragma_weak, [
91 gfor_save_CFLAGS="$CFLAGS"
92 CFLAGS="$CFLAGS -Wunknown-pragmas"
93 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
96 ]], [[if (foo) foo ();]])],
97 libgfor_cv_have_pragma_weak=yes, libgfor_cv_have_pragma_weak=no)])
98 if test $libgfor_cv_have_pragma_weak = yes; then
99 AC_DEFINE(SUPPORTS_WEAK, 1,
100 [Define to 1 if the target supports #pragma weak])
103 *-*-darwin* | *-*-hpux* | *-*-cygwin* | *-*-mingw* )
104 AC_DEFINE(GTHREAD_USE_WEAK, 0,
105 [Define to 0 if the target shouldn't use #pragma weak])
109 dnl Check whether target can unlink a file still open.
110 AC_DEFUN([LIBGFOR_CHECK_UNLINK_OPEN_FILE], [
111 AC_CACHE_CHECK([whether the target can unlink an open file],
112 libgfor_cv_have_unlink_open_file, [
113 AC_RUN_IFELSE([AC_LANG_SOURCE([[
117 #include <sys/stat.h>
123 fd = open ("testfile", O_RDWR | O_CREAT, S_IWUSR | S_IRUSR);
126 if (unlink ("testfile") == -1)
128 write (fd, "This is a test\n", 15);
131 if (open ("testfile", O_RDONLY) == -1 && errno == ENOENT)
135 }]])], libgfor_cv_have_unlink_open_file=yes, libgfor_cv_have_unlink_open_file=no, [
137 *mingw*) libgfor_cv_have_unlink_open_file=no ;;
138 *) libgfor_cv_have_unlink_open_file=yes;;
140 if test x"$libgfor_cv_have_unlink_open_file" = xyes; then
141 AC_DEFINE(HAVE_UNLINK_OPEN_FILE, 1, [Define if target can unlink open files.])
144 dnl Check whether CRLF is the line terminator
145 AC_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>
166 fd = open ("foo", O_WRONLY | O_CREAT | O_TRUNC, S_IRWXU);
169 if (write (fd, "\n", 1) < 0)
174 if ((fd = open ("foo", O_RDONLY | O_BINARY, S_IRWXU)) < 0)
176 bytes = read (fd, buff, 5);
177 if (bytes == 2 && buff[0] == '\r' && buff[1] == '\n')
182 }]])], libgfor_cv_have_crlf=yes, libgfor_cv_have_crlf=no, [
184 *mingw*) libgfor_cv_have_crlf=yes ;;
185 *) libgfor_cv_have_crlf=no;;
187 if test x"$libgfor_cv_have_crlf" = xyes; then
188 AC_DEFINE(HAVE_CRLF, 1, [Define if CRLF is line terminator.])
191 dnl Check whether the st_ino and st_dev stat fields taken together uniquely
192 dnl identify the file within the system. This is should be true for POSIX
193 dnl systems; it is known to be false on mingw32.
194 AC_DEFUN([LIBGFOR_CHECK_WORKING_STAT], [
195 AC_CACHE_CHECK([whether the target stat is reliable],
196 libgfor_cv_have_working_stat, [
197 AC_RUN_IFELSE([AC_LANG_SOURCE([[
199 #include <sys/types.h>
200 #include <sys/stat.h>
206 struct stat st1, st2;
208 f = fopen ("foo", "w");
209 g = fopen ("bar", "w");
210 if (stat ("foo", &st1) != 0 || stat ("bar", &st2))
212 if (st1.st_dev == st2.st_dev && st1.st_ino == st2.st_ino)
217 }]])], libgfor_cv_have_working_stat=yes, libgfor_cv_have_working_stat=no, [
219 *mingw*) libgfor_cv_have_working_stat=no ;;
220 *) libgfor_cv_have_working_stat=yes;;
222 if test x"$libgfor_cv_have_working_stat" = xyes; then
223 AC_DEFINE(HAVE_WORKING_STAT, 1, [Define if target has a reliable stat.])
226 dnl Checks for fpsetmask function.
227 AC_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 */
235 #endif /* HAVE_IEEEFP_H */]],[[fpsetmask(0);]])],
236 eval "libgfor_cv_have_fpsetmask=yes", eval "libgfor_cv_have_fpsetmask=no")
238 if test x"$libgfor_cv_have_fpsetmask" = xyes; then
240 AC_DEFINE(HAVE_FPSETMASK, 1, [Define if you have fpsetmask.])
244 dnl Check whether we have a mingw that provides a __mingw_snprintf function
245 AC_DEFUN([LIBGFOR_CHECK_MINGW_SNPRINTF], [
246 AC_CACHE_CHECK([whether __mingw_snprintf is present], libgfor_cv_have_mingw_snprintf, [
247 AC_LINK_IFELSE([AC_LANG_PROGRAM([[
249 extern int __mingw_snprintf (char *, size_t, const char *, ...);
251 __mingw_snprintf (NULL, 0, "%d\n", 1);
253 eval "libgfor_cv_have_mingw_snprintf=yes", eval "libgfor_cv_have_mingw_snprintf=no")
255 if test x"$libgfor_cv_have_mingw_snprintf" = xyes; then
256 AC_DEFINE(HAVE_MINGW_SNPRINTF, 1, [Define if you have __mingw_snprintf.])
260 dnl Check whether we have a broken powf implementation
261 AC_DEFUN([LIBGFOR_CHECK_FOR_BROKEN_POWF], [
262 AC_CACHE_CHECK([whether powf is broken], libgfor_cv_have_broken_powf, [
264 hppa*64*-*-hpux*) libgfor_cv_have_broken_powf=yes ;;
265 *) libgfor_cv_have_broken_powf=no;;
267 if test x"$libgfor_cv_have_broken_powf" = xyes; then
268 AC_DEFINE(HAVE_BROKEN_POWF, 1, [Define if powf is broken.])
272 dnl Check whether we have a __float128 type
273 AC_DEFUN([LIBGFOR_CHECK_FLOAT128], [
276 if test "x$enable_libquadmath_support" != xno; then
278 AC_CACHE_CHECK([whether we have a usable __float128 type],
279 libgfor_cv_have_float128, [
280 GCC_TRY_COMPILE_OR_LINK([
281 typedef _Complex float __attribute__((mode(TC))) __complex128;
283 __float128 foo (__float128 x)
292 return (__float128) z2;
295 __float128 bar (__float128 x)
297 return x * __builtin_huge_valq ();
303 libgfor_cv_have_float128=yes
305 libgfor_cv_have_float128=no
308 if test "x$libgfor_cv_have_float128" = xyes; then
309 AC_DEFINE(HAVE_FLOAT128, 1, [Define if have a usable __float128 type.])
311 dnl Check whether -Wl,--as-needed is supported
313 dnl Turn warnings into error to avoid testsuite breakage. So enable
314 dnl AC_LANG_WERROR, but there's currently (autoconf 2.64) no way to turn
315 dnl it off again. As a workaround, save and restore werror flag like
317 dnl Cf. http://gcc.gnu.org/ml/gcc-patches/2010-05/msg01889.html
318 ac_xsave_[]_AC_LANG_ABBREV[]_werror_flag=$ac_[]_AC_LANG_ABBREV[]_werror_flag
319 AC_CACHE_CHECK([whether --as-needed works],
320 [libgfor_cv_have_as_needed],
322 save_LDFLAGS="$LDFLAGS"
323 LDFLAGS="$LDFLAGS -Wl,--as-needed -lm -Wl,--no-as-needed"
324 libgfor_cv_have_as_needed=no
326 AC_LINK_IFELSE([AC_LANG_PROGRAM([])],
327 [libgfor_cv_have_as_needed=yes],
328 [libgfor_cv_have_as_needed=no])
329 LDFLAGS="$save_LDFLAGS"
330 ac_[]_AC_LANG_ABBREV[]_werror_flag=$ac_xsave_[]_AC_LANG_ABBREV[]_werror_flag
333 dnl For static libgfortran linkage, depend on libquadmath only if needed.
334 if test "x$libgfor_cv_have_as_needed" = xyes; then
335 LIBQUADSPEC="%{static-libgfortran:--as-needed} -lquadmath %{static-libgfortran:--no-as-needed}"
337 LIBQUADSPEC="-lquadmath"
339 if test -f ../libquadmath/libquadmath.la; then
340 LIBQUADLIB=../libquadmath/libquadmath.la
341 LIBQUADLIB_DEP=../libquadmath/libquadmath.la
342 LIBQUADINCLUDE='-I$(srcdir)/../libquadmath'
344 LIBQUADLIB="-lquadmath"
350 # for --disable-quadmath
356 dnl For the spec file
357 AC_SUBST(LIBQUADSPEC)
359 AC_SUBST(LIBQUADLIB_DEP)
360 AC_SUBST(LIBQUADINCLUDE)
362 dnl We need a conditional for the Makefile
363 AM_CONDITIONAL(LIBGFOR_BUILD_QUAD, [test "x$libgfor_cv_have_float128" = xyes])
367 dnl Check whether we have strerror_r
368 AC_DEFUN([LIBGFOR_CHECK_STRERROR_R], [
369 dnl Check for three-argument POSIX version of strerror_r
370 ac_save_CFLAGS="$CFLAGS"
371 CFLAGS="-Wimplicit-function-declaration -Werror"
372 AC_TRY_COMPILE([#define _GNU_SOURCE 1
374 #include <locale.h>],
375 [char s[128]; strerror_r(5, s, 128);],
376 AC_DEFINE(HAVE_STRERROR_R, 1,
377 [Define if strerror_r is available in <string.h>.]),)
378 CFLAGS="$ac_save_CFLAGS"
380 dnl Check for two-argument version of strerror_r (e.g. for VxWorks)
381 ac_save_CFLAGS="$CFLAGS"
382 CFLAGS="-Wimplicit-function-declaration -Werror"
383 AC_TRY_COMPILE([#define _GNU_SOURCE 1
385 #include <locale.h>],
386 [char s[128]; strerror_r(5, s);],
387 AC_DEFINE(HAVE_STRERROR_R_2ARGS, 1,
388 [Define if strerror_r takes two arguments and is available in <string.h>.]),)
389 CFLAGS="$ac_save_CFLAGS"