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 symbol aliases.
47 AC_DEFUN([LIBGFOR_CHECK_ATTRIBUTE_ALIAS], [
48 AC_CACHE_CHECK([whether the target supports symbol aliases],
49 libgfor_cv_have_attribute_alias, [
50 AC_LINK_IFELSE([AC_LANG_PROGRAM([[
52 extern void bar(void) __attribute__((alias("foo")));]],
53 [[bar();]])], libgfor_cv_have_attribute_alias=yes, libgfor_cv_have_attribute_alias=no)])
54 if test $libgfor_cv_have_attribute_alias = yes; then
55 AC_DEFINE(HAVE_ATTRIBUTE_ALIAS, 1,
56 [Define to 1 if the target supports __attribute__((alias(...))).])
59 dnl Check whether the target supports __sync_fetch_and_add.
60 AC_DEFUN([LIBGFOR_CHECK_SYNC_FETCH_AND_ADD], [
61 AC_CACHE_CHECK([whether the target supports __sync_fetch_and_add],
62 libgfor_cv_have_sync_fetch_and_add, [
63 AC_LINK_IFELSE([AC_LANG_PROGRAM([[int foovar = 0;]], [[
64 if (foovar <= 0) return __sync_fetch_and_add (&foovar, 1);
65 if (foovar > 10) return __sync_add_and_fetch (&foovar, -1);]])],
66 libgfor_cv_have_sync_fetch_and_add=yes, libgfor_cv_have_sync_fetch_and_add=no)])
67 if test $libgfor_cv_have_sync_fetch_and_add = yes; then
68 AC_DEFINE(HAVE_SYNC_FETCH_AND_ADD, 1,
69 [Define to 1 if the target supports __sync_fetch_and_add])
72 dnl Check whether target effectively supports weakref
73 AC_DEFUN([LIBGFOR_CHECK_WEAKREF], [
74 AC_CACHE_CHECK([whether the target supports weakref],
75 libgfor_cv_have_weakref, [
77 CFLAGS="$CFLAGS -Wunknown-pragmas -Werror"
78 AC_LINK_IFELSE([AC_LANG_PROGRAM([[
79 static int mytoto (int) __attribute__((__weakref__("toto")));
80 ]], [[return (mytoto != 0);]])],
81 libgfor_cv_have_weakref=yes, libgfor_cv_have_weakref=no)
82 CFLAGS="$save_CFLAGS"])
83 if test $libgfor_cv_have_weakref = yes; then
84 AC_DEFINE(SUPPORTS_WEAKREF, 1,
85 [Define to 1 if the target supports weakref])
88 dnl Check whether target can unlink a file still open.
89 AC_DEFUN([LIBGFOR_CHECK_UNLINK_OPEN_FILE], [
90 AC_CACHE_CHECK([whether the target can unlink an open file],
91 libgfor_cv_have_unlink_open_file, [
92 AC_RUN_IFELSE([AC_LANG_SOURCE([[
102 fd = open ("testfile", O_RDWR | O_CREAT, S_IWUSR | S_IRUSR);
105 if (unlink ("testfile") == -1)
107 write (fd, "This is a test\n", 15);
110 if (open ("testfile", O_RDONLY) == -1 && errno == ENOENT)
114 }]])], libgfor_cv_have_unlink_open_file=yes, libgfor_cv_have_unlink_open_file=no, [
116 *mingw*) libgfor_cv_have_unlink_open_file=no ;;
117 *) libgfor_cv_have_unlink_open_file=yes;;
119 if test x"$libgfor_cv_have_unlink_open_file" = xyes; then
120 AC_DEFINE(HAVE_UNLINK_OPEN_FILE, 1, [Define if target can unlink open files.])
123 dnl Check whether CRLF is the line terminator
124 AC_DEFUN([LIBGFOR_CHECK_CRLF], [
125 AC_CACHE_CHECK([whether the target has CRLF as line terminator],
126 libgfor_cv_have_crlf, [
127 AC_RUN_IFELSE([AC_LANG_SOURCE([[
128 /* This test program should exit with status 0 if system uses a CRLF as
129 line terminator, and status 1 otherwise.
130 Since it is used to check for mingw systems, and should return 0 in any
131 other case, in case of a failure we will not use CRLF. */
132 #include <sys/stat.h>
145 fd = open ("foo", O_WRONLY | O_CREAT | O_TRUNC, S_IRWXU);
148 if (write (fd, "\n", 1) < 0)
153 if ((fd = open ("foo", O_RDONLY | O_BINARY, S_IRWXU)) < 0)
155 bytes = read (fd, buff, 5);
156 if (bytes == 2 && buff[0] == '\r' && buff[1] == '\n')
161 }]])], libgfor_cv_have_crlf=yes, libgfor_cv_have_crlf=no, [
163 *mingw*) libgfor_cv_have_crlf=yes ;;
164 *) libgfor_cv_have_crlf=no;;
166 if test x"$libgfor_cv_have_crlf" = xyes; then
167 AC_DEFINE(HAVE_CRLF, 1, [Define if CRLF is line terminator.])
170 dnl Check whether the st_ino and st_dev stat fields taken together uniquely
171 dnl identify the file within the system. This is should be true for POSIX
172 dnl systems; it is known to be false on mingw32.
173 AC_DEFUN([LIBGFOR_CHECK_WORKING_STAT], [
174 AC_CACHE_CHECK([whether the target stat is reliable],
175 libgfor_cv_have_working_stat, [
176 AC_RUN_IFELSE([AC_LANG_SOURCE([[
178 #include <sys/types.h>
179 #include <sys/stat.h>
185 struct stat st1, st2;
187 f = fopen ("foo", "w");
188 g = fopen ("bar", "w");
189 if (stat ("foo", &st1) != 0 || stat ("bar", &st2))
191 if (st1.st_dev == st2.st_dev && st1.st_ino == st2.st_ino)
196 }]])], libgfor_cv_have_working_stat=yes, libgfor_cv_have_working_stat=no, [
198 *mingw*) libgfor_cv_have_working_stat=no ;;
199 *) libgfor_cv_have_working_stat=yes;;
201 if test x"$libgfor_cv_have_working_stat" = xyes; then
202 AC_DEFINE(HAVE_WORKING_STAT, 1, [Define if target has a reliable stat.])
205 dnl Checks for fpsetmask function.
206 AC_DEFUN([LIBGFOR_CHECK_FPSETMASK], [
207 AC_CACHE_CHECK([whether fpsetmask is present], libgfor_cv_have_fpsetmask, [
208 AC_LINK_IFELSE([AC_LANG_PROGRAM([[
209 #if HAVE_FLOATINGPOINT_H
210 # include <floatingpoint.h>
211 #endif /* HAVE_FLOATINGPOINT_H */
214 #endif /* HAVE_IEEEFP_H */]],[[fpsetmask(0);]])],
215 eval "libgfor_cv_have_fpsetmask=yes", eval "libgfor_cv_have_fpsetmask=no")
217 if test x"$libgfor_cv_have_fpsetmask" = xyes; then
219 AC_DEFINE(HAVE_FPSETMASK, 1, [Define if you have fpsetmask.])
223 dnl Check whether we have a mingw that provides a __mingw_snprintf function
224 AC_DEFUN([LIBGFOR_CHECK_MINGW_SNPRINTF], [
225 AC_CACHE_CHECK([whether __mingw_snprintf is present], libgfor_cv_have_mingw_snprintf, [
226 AC_LINK_IFELSE([AC_LANG_PROGRAM([[
228 extern int __mingw_snprintf (char *, size_t, const char *, ...);
230 __mingw_snprintf (NULL, 0, "%d\n", 1);
232 eval "libgfor_cv_have_mingw_snprintf=yes", eval "libgfor_cv_have_mingw_snprintf=no")
234 if test x"$libgfor_cv_have_mingw_snprintf" = xyes; then
235 AC_DEFINE(HAVE_MINGW_SNPRINTF, 1, [Define if you have __mingw_snprintf.])
239 dnl Check whether we have a __float128 type
240 AC_DEFUN([LIBGFOR_CHECK_FLOAT128], [
243 if test "x$enable_libquadmath_support" != xno; then
245 AC_CACHE_CHECK([whether we have a usable __float128 type],
246 libgfor_cv_have_float128, [
247 GCC_TRY_COMPILE_OR_LINK([
248 typedef _Complex float __attribute__((mode(TC))) __complex128;
250 __float128 foo (__float128 x)
259 return (__float128) z2;
262 __float128 bar (__float128 x)
264 return x * __builtin_huge_valq ();
270 libgfor_cv_have_float128=yes
272 libgfor_cv_have_float128=no
275 if test "x$libgfor_cv_have_float128" = xyes; then
276 AC_DEFINE(HAVE_FLOAT128, 1, [Define if have a usable __float128 type.])
278 dnl Check whether -Wl,--as-needed resp. -Wl,-zignore is supported
280 dnl Turn warnings into error to avoid testsuite breakage. So enable
281 dnl AC_LANG_WERROR, but there's currently (autoconf 2.64) no way to turn
282 dnl it off again. As a workaround, save and restore werror flag like
284 dnl Cf. http://gcc.gnu.org/ml/gcc-patches/2010-05/msg01889.html
285 ac_xsave_[]_AC_LANG_ABBREV[]_werror_flag=$ac_[]_AC_LANG_ABBREV[]_werror_flag
286 AC_CACHE_CHECK([whether --as-needed/-z ignore works],
287 [libgfor_cv_have_as_needed],
289 # Test for native Solaris options first.
290 # No whitespace after -z to pass it through -Wl.
291 libgfor_cv_as_needed_option="-zignore"
292 libgfor_cv_no_as_needed_option="-zrecord"
293 save_LDFLAGS="$LDFLAGS"
294 LDFLAGS="$LDFLAGS -Wl,$libgfor_cv_as_needed_option -lm -Wl,$libgfor_cv_no_as_needed_option"
295 libgfor_cv_have_as_needed=no
297 AC_LINK_IFELSE([AC_LANG_PROGRAM([])],
298 [libgfor_cv_have_as_needed=yes],
299 [libgfor_cv_have_as_needed=no])
300 LDFLAGS="$save_LDFLAGS"
301 if test "x$libgfor_cv_have_as_needed" = xno; then
302 libgfor_cv_as_needed_option="--as-needed"
303 libgfor_cv_no_as_needed_option="--no-as-needed"
304 save_LDFLAGS="$LDFLAGS"
305 LDFLAGS="$LDFLAGS -Wl,$libgfor_cv_as_needed_option -lm -Wl,$libgfor_cv_no_as_needed_option"
306 libgfor_cv_have_as_needed=no
308 AC_LINK_IFELSE([AC_LANG_PROGRAM([])],
309 [libgfor_cv_have_as_needed=yes],
310 [libgfor_cv_have_as_needed=no])
311 LDFLAGS="$save_LDFLAGS"
313 ac_[]_AC_LANG_ABBREV[]_werror_flag=$ac_xsave_[]_AC_LANG_ABBREV[]_werror_flag
316 dnl For static libgfortran linkage, depend on libquadmath only if needed.
317 if test "x$libgfor_cv_have_as_needed" = xyes; then
318 LIBQUADSPEC="%{static-libgfortran:$libgfor_cv_as_needed_option} -lquadmath %{static-libgfortran:$libgfor_cv_no_as_needed_option}"
320 LIBQUADSPEC="-lquadmath"
322 if test -f ../libquadmath/libquadmath.la; then
323 LIBQUADLIB=../libquadmath/libquadmath.la
324 LIBQUADLIB_DEP=../libquadmath/libquadmath.la
325 LIBQUADINCLUDE='-I$(srcdir)/../libquadmath'
327 LIBQUADLIB="-lquadmath"
333 # for --disable-quadmath
339 dnl For the spec file
340 AC_SUBST(LIBQUADSPEC)
342 AC_SUBST(LIBQUADLIB_DEP)
343 AC_SUBST(LIBQUADINCLUDE)
345 dnl We need a conditional for the Makefile
346 AM_CONDITIONAL(LIBGFOR_BUILD_QUAD, [test "x$libgfor_cv_have_float128" = xyes])
350 dnl Check whether we have strerror_r
351 AC_DEFUN([LIBGFOR_CHECK_STRERROR_R], [
352 dnl Check for three-argument POSIX version of strerror_r
353 ac_save_CFLAGS="$CFLAGS"
354 CFLAGS="-Wimplicit-function-declaration -Werror"
355 AC_TRY_COMPILE([#define _GNU_SOURCE 1
357 #include <locale.h>],
358 [char s[128]; strerror_r(5, s, 128);],
359 AC_DEFINE(HAVE_STRERROR_R, 1,
360 [Define if strerror_r is available in <string.h>.]),)
361 CFLAGS="$ac_save_CFLAGS"
363 dnl Check for two-argument version of strerror_r (e.g. for VxWorks)
364 ac_save_CFLAGS="$CFLAGS"
365 CFLAGS="-Wimplicit-function-declaration -Werror"
366 AC_TRY_COMPILE([#define _GNU_SOURCE 1
368 #include <locale.h>],
369 [char s[128]; strerror_r(5, s);],
370 AC_DEFINE(HAVE_STRERROR_R_2ARGS, 1,
371 [Define if strerror_r takes two arguments and is available in <string.h>.]),)
372 CFLAGS="$ac_save_CFLAGS"