1 m4_include(../config/acx.m4)
2 m4_include(../config/no-executables.m4)
4 dnl Check that we have a working GNU Fortran compiler
5 AC_DEFUN([LIBGFOR_WORKING_GFORTRAN], [
6 AC_MSG_CHECKING([whether the GNU Fortran compiler is working])
7 AC_LANG_PUSH([Fortran])
10 real, parameter :: bar = sin (12.34 / 2.5)
12 [AC_MSG_RESULT([yes])],
14 AC_MSG_ERROR([GNU Fortran is not working; please report a bug in http://gcc.gnu.org/bugzilla, attaching $PWD/config.log])
16 AC_LANG_POP([Fortran])
20 sinclude(../libtool.m4)
21 dnl The lines below arrange for aclocal not to bring an installed
22 dnl libtool.m4 into aclocal.m4, while still arranging for automake to
23 dnl add a definition of LIBTOOL to Makefile.in.
24 ifelse(,,,[AC_SUBST(LIBTOOL)
25 AC_DEFUN([AM_PROG_LIBTOOL])
26 AC_DEFUN([AC_LIBTOOL_DLOPEN])
27 AC_DEFUN([AC_PROG_LD])
30 dnl Check whether the target supports hidden visibility.
31 AC_DEFUN([LIBGFOR_CHECK_ATTRIBUTE_VISIBILITY], [
32 AC_CACHE_CHECK([whether the target supports hidden visibility],
33 libgfor_cv_have_attribute_visibility, [
35 CFLAGS="$CFLAGS -Werror"
36 AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }],
37 [], libgfor_cv_have_attribute_visibility=yes,
38 libgfor_cv_have_attribute_visibility=no)
39 CFLAGS="$save_CFLAGS"])
40 if test $libgfor_cv_have_attribute_visibility = yes; then
41 AC_DEFINE(HAVE_ATTRIBUTE_VISIBILITY, 1,
42 [Define to 1 if the target supports __attribute__((visibility(...))).])
45 dnl Check whether the target supports dllexport
46 AC_DEFUN([LIBGFOR_CHECK_ATTRIBUTE_DLLEXPORT], [
47 AC_CACHE_CHECK([whether the target supports dllexport],
48 libgfor_cv_have_attribute_dllexport, [
50 CFLAGS="$CFLAGS -Werror"
51 AC_TRY_COMPILE([void __attribute__((dllexport)) foo(void) { }],
52 [], libgfor_cv_have_attribute_dllexport=yes,
53 libgfor_cv_have_attribute_dllexport=no)
54 CFLAGS="$save_CFLAGS"])
55 if test $libgfor_cv_have_attribute_dllexport = yes; then
56 AC_DEFINE(HAVE_ATTRIBUTE_DLLEXPORT, 1,
57 [Define to 1 if the target supports __attribute__((dllexport)).])
60 dnl Check whether the target supports symbol aliases.
61 AC_DEFUN([LIBGFOR_CHECK_ATTRIBUTE_ALIAS], [
62 AC_CACHE_CHECK([whether the target supports symbol aliases],
63 libgfor_cv_have_attribute_alias, [
66 extern void bar(void) __attribute__((alias("foo")));],
67 [bar();], libgfor_cv_have_attribute_alias=yes, libgfor_cv_have_attribute_alias=no)])
68 if test $libgfor_cv_have_attribute_alias = yes; then
69 AC_DEFINE(HAVE_ATTRIBUTE_ALIAS, 1,
70 [Define to 1 if the target supports __attribute__((alias(...))).])
73 dnl Check whether the target supports __sync_fetch_and_add.
74 AC_DEFUN([LIBGFOR_CHECK_SYNC_FETCH_AND_ADD], [
75 AC_CACHE_CHECK([whether the target supports __sync_fetch_and_add],
76 libgfor_cv_have_sync_fetch_and_add, [
77 AC_TRY_LINK([int foovar = 0;], [
78 if (foovar <= 0) return __sync_fetch_and_add (&foovar, 1);
79 if (foovar > 10) return __sync_add_and_fetch (&foovar, -1);],
80 libgfor_cv_have_sync_fetch_and_add=yes, libgfor_cv_have_sync_fetch_and_add=no)])
81 if test $libgfor_cv_have_sync_fetch_and_add = yes; then
82 AC_DEFINE(HAVE_SYNC_FETCH_AND_ADD, 1,
83 [Define to 1 if the target supports __sync_fetch_and_add])
86 dnl Check if threads are supported.
87 AC_DEFUN([LIBGFOR_CHECK_GTHR_DEFAULT], [
88 AC_CACHE_CHECK([configured target thread model],
89 libgfor_cv_target_thread_file, [
90 libgfor_cv_target_thread_file=`$CC -v 2>&1 | sed -n 's/^Thread model: //p'`])
92 if test $libgfor_cv_target_thread_file != single; then
93 AC_DEFINE(HAVE_GTHR_DEFAULT, 1,
94 [Define if the compiler has a thread header that is non single.])
97 dnl Check for pragma weak.
98 AC_DEFUN([LIBGFOR_GTHREAD_WEAK], [
99 AC_CACHE_CHECK([whether pragma weak works],
100 libgfor_cv_have_pragma_weak, [
101 gfor_save_CFLAGS="$CFLAGS"
102 CFLAGS="$CFLAGS -Wunknown-pragmas"
103 AC_TRY_COMPILE([void foo (void);
104 #pragma weak foo], [if (foo) foo ();],
105 libgfor_cv_have_pragma_weak=yes, libgfor_cv_have_pragma_weak=no)])
106 if test $libgfor_cv_have_pragma_weak = yes; then
107 AC_DEFINE(SUPPORTS_WEAK, 1,
108 [Define to 1 if the target supports #pragma weak])
111 *-*-darwin* | *-*-hpux* | *-*-cygwin* | *-*-mingw* )
112 AC_DEFINE(GTHREAD_USE_WEAK, 0,
113 [Define to 0 if the target shouldn't use #pragma weak])
117 dnl Check whether target can unlink a file still open.
118 AC_DEFUN([LIBGFOR_CHECK_UNLINK_OPEN_FILE], [
119 AC_CACHE_CHECK([whether the target can unlink an open file],
120 libgfor_cv_have_unlink_open_file, [
125 #include <sys/stat.h>
131 fd = open ("testfile", O_RDWR | O_CREAT, S_IWRITE | S_IREAD);
134 if (unlink ("testfile") == -1)
136 write (fd, "This is a test\n", 15);
139 if (open ("testfile", O_RDONLY, S_IWRITE | S_IREAD) == -1 && errno == ENOENT)
143 }], libgfor_cv_have_unlink_open_file=yes, libgfor_cv_have_unlink_open_file=no, [
145 *mingw*) libgfor_cv_have_unlink_open_file=no ;;
146 *) libgfor_cv_have_unlink_open_file=yes;;
148 if test x"$libgfor_cv_have_unlink_open_file" = xyes; then
149 AC_DEFINE(HAVE_UNLINK_OPEN_FILE, 1, [Define if target can unlink open files.])
152 dnl Check whether CRLF is the line terminator
153 AC_DEFUN([LIBGFOR_CHECK_CRLF], [
154 AC_CACHE_CHECK([whether the target has CRLF as line terminator],
155 libgfor_cv_have_crlf, [
157 /* This test program should exit with status 0 if system uses a CRLF as
158 line terminator, and status 1 otherwise.
159 Since it is used to check for mingw systems, and should return 0 in any
160 other case, in case of a failure we will not use CRLF. */
161 #include <sys/stat.h>
174 fd = open ("foo", O_WRONLY | O_CREAT | O_TRUNC, S_IRWXU);
177 if (write (fd, "\n", 1) < 0)
182 if ((fd = open ("foo", O_RDONLY | O_BINARY, S_IRWXU)) < 0)
184 bytes = read (fd, buff, 5);
185 if (bytes == 2 && buff[0] == '\r' && buff[1] == '\n')
190 }], libgfor_cv_have_crlf=yes, libgfor_cv_have_crlf=no, [
192 *mingw*) libgfor_cv_have_crlf=yes ;;
193 *) libgfor_cv_have_crlf=no;;
195 if test x"$libgfor_cv_have_crlf" = xyes; then
196 AC_DEFINE(HAVE_CRLF, 1, [Define if CRLF is line terminator.])
199 dnl Check whether the st_ino and st_dev stat fields taken together uniquely
200 dnl identify the file within the system. This is should be true for POSIX
201 dnl systems; it is known to be false on mingw32.
202 AC_DEFUN([LIBGFOR_CHECK_WORKING_STAT], [
203 AC_CACHE_CHECK([whether the target stat is reliable],
204 libgfor_cv_have_working_stat, [
207 #include <sys/types.h>
208 #include <sys/stat.h>
214 struct stat st1, st2;
216 f = fopen ("foo", "w");
217 g = fopen ("bar", "w");
218 if (stat ("foo", &st1) != 0 || stat ("bar", &st2))
220 if (st1.st_dev == st2.st_dev && st1.st_ino == st2.st_ino)
225 }], libgfor_cv_have_working_stat=yes, libgfor_cv_have_working_stat=no, [
227 *mingw*) libgfor_cv_have_working_stat=no ;;
228 *) libgfor_cv_have_working_stat=yes;;
230 if test x"$libgfor_cv_have_working_stat" = xyes; then
231 AC_DEFINE(HAVE_WORKING_STAT, 1, [Define if target has a reliable stat.])
234 dnl Checks for fpsetmask function.
235 AC_DEFUN([LIBGFOR_CHECK_FPSETMASK], [
236 AC_CACHE_CHECK([whether fpsetmask is present], libgfor_cv_have_fpsetmask, [
238 #if HAVE_FLOATINGPOINT_H
239 # include <floatingpoint.h>
240 #endif /* HAVE_FLOATINGPOINT_H */
243 #endif /* HAVE_IEEEFP_H */],[fpsetmask(0);],
244 eval "libgfor_cv_have_fpsetmask=yes", eval "libgfor_cv_have_fpsetmask=no")
246 if test x"$libgfor_cv_have_fpsetmask" = xyes; then
247 AC_DEFINE(HAVE_FPSETMASK, 1, [Define if you have fpsetmask.])
251 dnl Check whether we have a mingw that provides a __mingw_snprintf function
252 AC_DEFUN([LIBGFOR_CHECK_MINGW_SNPRINTF], [
253 AC_CACHE_CHECK([whether __mingw_snprintf is present], libgfor_cv_have_mingw_snprintf, [
256 extern int __mingw_snprintf (char *, size_t, const char *, ...);
258 __mingw_snprintf (NULL, 0, "%d\n", 1);
260 eval "libgfor_cv_have_mingw_snprintf=yes", eval "libgfor_cv_have_mingw_snprintf=no")
262 if test x"$libgfor_cv_have_mingw_snprintf" = xyes; then
263 AC_DEFINE(HAVE_MINGW_SNPRINTF, 1, [Define if you have __mingw_snprintf.])
267 dnl Check whether we have a broken powf implementation
268 AC_DEFUN([LIBGFOR_CHECK_FOR_BROKEN_POWF], [
269 AC_CACHE_CHECK([whether powf is broken], libgfor_cv_have_broken_powf, [
271 hppa*64*-*-hpux*) libgfor_cv_have_broken_powf=yes ;;
272 *) libgfor_cv_have_broken_powf=no;;
274 if test x"$libgfor_cv_have_broken_powf" = xyes; then
275 AC_DEFINE(HAVE_BROKEN_POWF, 1, [Define if powf is broken.])
279 dnl Check whether we have a __float128 type
280 AC_DEFUN([LIBGFOR_CHECK_FLOAT128], [
283 if test "x$enable_libquadmath_support" != xno; then
285 AC_CACHE_CHECK([whether we have a usable __float128 type],
286 libgfor_cv_have_float128, [
290 typedef _Complex float __attribute__((mode(TC))) __complex128;
293 x = __builtin_huge_valq() - 2.e1000Q;
302 libgfor_cv_have_float128=yes,
303 libgfor_cv_have_float128=no)
306 if test "x$libgfor_cv_have_float128" = xyes; then
307 AC_DEFINE(HAVE_FLOAT128, 1, [Define if have a usable __float128 type.])
309 dnl Check whether -Wl,--as-needed is supported
311 dnl Turn warnings into error to avoid testsuite breakage. So enable
312 dnl AC_LANG_WERROR, but there's currently (autoconf 2.64) no way to turn
313 dnl it off again. As a workaround, save and restore werror flag like
315 dnl Cf. http://gcc.gnu.org/ml/gcc-patches/2010-05/msg01889.html
316 ac_xsave_[]_AC_LANG_ABBREV[]_werror_flag=$ac_[]_AC_LANG_ABBREV[]_werror_flag
317 AC_CACHE_CHECK([whether --as-needed works],
318 [libgfor_cv_have_as_needed],
320 save_LDFLAGS="$LDFLAGS"
321 LDFLAGS="$LDFLAGS -Wl,--as-needed -lm -Wl,--no-as-needed"
322 libgfor_cv_have_as_needed=no
324 AC_LINK_IFELSE([AC_LANG_PROGRAM([])],
325 [libgfor_cv_have_as_needed=yes],
326 [libgfor_cv_have_as_needed=no])
327 LDFLAGS="$save_LDFLAGS"
328 ac_[]_AC_LANG_ABBREV[]_werror_flag=$ac_xsave_[]_AC_LANG_ABBREV[]_werror_flag
331 dnl For static libgfortran linkage, depend on libquadmath only if needed.
332 if test "x$libgfor_cv_have_as_needed" = xyes; then
333 LIBQUADSPEC="%{static-libgfortran:--as-needed} -lquadmath %{static-libgfortran:--no-as-needed}"
335 LIBQUADSPEC="-lquadmath"
337 if test -f ../libquadmath/libquadmath.la; then
338 LIBQUADLIB=../libquadmath/libquadmath.la
339 LIBQUADLIB_DEP=../libquadmath/libquadmath.la
340 LIBQUADINCLUDE='-I$(srcdir)/../libquadmath'
342 LIBQUADLIB="-lquadmath"
348 # for --disable-quadmath
354 dnl For the spec file
355 AC_SUBST(LIBQUADSPEC)
357 AC_SUBST(LIBQUADLIB_DEP)
358 AC_SUBST(LIBQUADINCLUDE)
360 dnl We need a conditional for the Makefile
361 AM_CONDITIONAL(LIBGFOR_BUILD_QUAD, [test "x$libgfor_cv_have_float128" = xyes])