1 m4_include(../config/acx.m4)
2 m4_include(../config/no-executables.m4)
5 dnl * If we have gettimeofday;
6 dnl * If we have struct timezone for use in calling it;
7 dnl * If calling it with a timezone pointer actually works -- this is deemed
8 dnl obsolete or undefined on some systems which say you should use a null
9 dnl pointer -- and undefine HAVE_TIMEZONE if so;
10 dnl * Whether it only takes one arg.
11 AC_DEFUN([LIBGFOR_GETTIMEOFDAY], [
12 AC_CHECK_FUNCS(gettimeofday)
13 if test "$ac_cv_func_gettimeofday" = yes; then
14 AC_CACHE_CHECK([for struct timezone], gfor_cv_struct_timezone,
15 [AC_TRY_COMPILE([#include <sys/time.h>],
16 [struct timezone tz;],
17 gfor_cv_struct_timezone=yes, gfor_cv_struct_timezone=no)])
18 if test $gfor_cv_struct_timezone = yes; then
19 dnl It may be that we can't call gettimeofday with a non-null pointer.
20 dnl In that case we'll lie about struct timezone.
22 #ifdef TIME_WITH_SYS_TIME
26 #ifdef HAVE_SYS_TIME_H
35 struct timezone dummy;
36 if (gettimeofday (&time, &dummy))
41 [gfor_have_struct_timezone=yes], [gfor_have_struct_timezone=no],
42 [gfor_have_struct_timezone=yes])
43 if test $gfor_have_struct_timezone = yes; then
44 AC_DEFINE(HAVE_TIMEZONE, 1, [Do we have struct timezone])
47 AC_REQUIRE([AC_HEADER_TIME])
48 AC_CACHE_CHECK([whether gettimeofday can accept two arguments],
49 emacs_cv_gettimeofday_two_arguments,
51 #ifdef TIME_WITH_SYS_TIME
55 #ifdef HAVE_SYS_TIME_H
65 struct timezone dummy;
70 gettimeofday (&time, DUMMY);],
71 emacs_cv_gettimeofday_two_arguments=yes,
72 emacs_cv_gettimeofday_two_arguments=no)])
73 if test $emacs_cv_gettimeofday_two_arguments = no; then
74 AC_DEFINE(GETTIMEOFDAY_ONE_ARGUMENT, 1,
75 [Does gettimeofday take a single argument])
79 sinclude(../libtool.m4)
80 dnl The lines below arrange for aclocal not to bring an installed
81 dnl libtool.m4 into aclocal.m4, while still arranging for automake to
82 dnl add a definition of LIBTOOL to Makefile.in.
83 ifelse(,,,[AC_SUBST(LIBTOOL)
84 AC_DEFUN([AM_PROG_LIBTOOL])
85 AC_DEFUN([AC_LIBTOOL_DLOPEN])
86 AC_DEFUN([AC_PROG_LD])
89 dnl Check whether the target is ILP32.
90 AC_DEFUN([LIBGFOR_TARGET_ILP32], [
91 AC_CACHE_CHECK([whether the target is ILP32], target_ilp32, [
95 if (sizeof(int) == 4 && sizeof(long) == 4 && sizeof(void *) == 4)
98 undefined_function ();
102 CFLAGS="$save_CFLAGS"])
103 if test $target_ilp32 = yes; then
104 AC_DEFINE(TARGET_ILP32, 1,
105 [Define to 1 if the target is ILP32.])
109 dnl Check whether the target supports hidden visibility.
110 AC_DEFUN([LIBGFOR_CHECK_ATTRIBUTE_VISIBILITY], [
111 AC_CACHE_CHECK([whether the target supports hidden visibility],
112 have_attribute_visibility, [
113 save_CFLAGS="$CFLAGS"
114 CFLAGS="$CFLAGS -Werror"
115 AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }],
116 [], have_attribute_visibility=yes,
117 have_attribute_visibility=no)
118 CFLAGS="$save_CFLAGS"])
119 if test $have_attribute_visibility = yes; then
120 AC_DEFINE(HAVE_ATTRIBUTE_VISIBILITY, 1,
121 [Define to 1 if the target supports __attribute__((visibility(...))).])
124 dnl Check whether the target supports dllexport
125 AC_DEFUN([LIBGFOR_CHECK_ATTRIBUTE_DLLEXPORT], [
126 AC_CACHE_CHECK([whether the target supports dllexport],
127 have_attribute_dllexport, [
128 save_CFLAGS="$CFLAGS"
129 CFLAGS="$CFLAGS -Werror"
130 AC_TRY_COMPILE([void __attribute__((dllexport)) foo(void) { }],
131 [], have_attribute_dllexport=yes,
132 have_attribute_dllexport=no)
133 CFLAGS="$save_CFLAGS"])
134 if test $have_attribute_dllexport = yes; then
135 AC_DEFINE(HAVE_ATTRIBUTE_DLLEXPORT, 1,
136 [Define to 1 if the target supports __attribute__((dllexport)).])
139 dnl Check whether the target supports symbol aliases.
140 AC_DEFUN([LIBGFOR_CHECK_ATTRIBUTE_ALIAS], [
141 AC_CACHE_CHECK([whether the target supports symbol aliases],
142 have_attribute_alias, [
144 #define ULP STR1(__USER_LABEL_PREFIX__)
145 #define STR1(x) STR2(x)
148 extern void bar(void) __attribute__((alias(ULP "foo")));],
149 [bar();], have_attribute_alias=yes, have_attribute_alias=no)])
150 if test $have_attribute_alias = yes; then
151 AC_DEFINE(HAVE_ATTRIBUTE_ALIAS, 1,
152 [Define to 1 if the target supports __attribute__((alias(...))).])
155 dnl Check whether the target supports __sync_fetch_and_add.
156 AC_DEFUN([LIBGFOR_CHECK_SYNC_FETCH_AND_ADD], [
157 AC_CACHE_CHECK([whether the target supports __sync_fetch_and_add],
158 have_sync_fetch_and_add, [
159 AC_TRY_LINK([int foovar = 0;], [
160 if (foovar <= 0) return __sync_fetch_and_add (&foovar, 1);
161 if (foovar > 10) return __sync_add_and_fetch (&foovar, -1);],
162 have_sync_fetch_and_add=yes, have_sync_fetch_and_add=no)])
163 if test $have_sync_fetch_and_add = yes; then
164 AC_DEFINE(HAVE_SYNC_FETCH_AND_ADD, 1,
165 [Define to 1 if the target supports __sync_fetch_and_add])
168 dnl Check if threads are supported.
169 AC_DEFUN([LIBGFOR_CHECK_GTHR_DEFAULT], [
170 AC_CACHE_CHECK([configured target thread model],
171 target_thread_file, [
172 target_thread_file=`$CC -v 2>&1 | sed -n 's/^Thread model: //p'`])
174 if test $target_thread_file != single; then
175 AC_DEFINE(HAVE_GTHR_DEFAULT, 1,
176 [Define if the compiler has a thread header that is non single.])
179 dnl Check for pragma weak.
180 AC_DEFUN([LIBGFOR_GTHREAD_WEAK], [
181 AC_CACHE_CHECK([whether pragma weak works],
183 gfor_save_CFLAGS="$CFLAGS"
184 CFLAGS="$CFLAGS -Wunknown-pragmas"
185 AC_TRY_COMPILE([void foo (void);
186 #pragma weak foo], [if (foo) foo ();],
187 have_pragma_weak=yes, have_pragma_weak=no)])
188 if test $have_pragma_weak = yes; then
189 AC_DEFINE(SUPPORTS_WEAK, 1,
190 [Define to 1 if the target supports #pragma weak])
193 *-*-darwin* | *-*-hpux* | *-*-cygwin*)
194 AC_DEFINE(GTHREAD_USE_WEAK, 0,
195 [Define to 0 if the target shouldn't use #pragma weak])
199 dnl Check whether target can unlink a file still open.
200 AC_DEFUN([LIBGFOR_CHECK_UNLINK_OPEN_FILE], [
201 AC_CACHE_CHECK([whether the target can unlink an open file],
202 have_unlink_open_file, [
207 #include <sys/stat.h>
213 fd = open ("testfile", O_RDWR | O_CREAT, S_IWRITE | S_IREAD);
216 if (unlink ("testfile") == -1)
218 write (fd, "This is a test\n", 15);
221 if (open ("testfile", O_RDONLY, S_IWRITE | S_IREAD) == -1 && errno == ENOENT)
225 }], have_unlink_open_file=yes, have_unlink_open_file=no, [
227 *mingw*) have_unlink_open_file=no ;;
228 *) have_unlink_open_file=yes;;
230 if test x"$have_unlink_open_file" = xyes; then
231 AC_DEFINE(HAVE_UNLINK_OPEN_FILE, 1, [Define if target can unlink open files.])
234 dnl Check whether CRLF is the line terminator
235 AC_DEFUN([LIBGFOR_CHECK_CRLF], [
236 AC_CACHE_CHECK([whether the target has CRLF as line terminator],
239 /* This test program should exit with status 0 if system uses a CRLF as
240 line terminator, and status 1 otherwise.
241 Since it is used to check for mingw systems, and should return 0 in any
242 other case, in case of a failure we will not use CRLF. */
243 #include <sys/stat.h>
256 fd = open ("foo", O_WRONLY | O_CREAT | O_TRUNC, S_IRWXU);
259 if (write (fd, "\n", 1) < 0)
264 if ((fd = open ("foo", O_RDONLY | O_BINARY, S_IRWXU)) < 0)
266 bytes = read (fd, buff, 5);
267 if (bytes == 2 && buff[0] == '\r' && buff[1] == '\n')
272 }], have_crlf=yes, have_crlf=no, [
274 *mingw*) have_crlf=yes ;;
277 if test x"$have_crlf" = xyes; then
278 AC_DEFINE(HAVE_CRLF, 1, [Define if CRLF is line terminator.])
281 dnl Check whether isfinite is broken.
282 dnl The most common problem is that it does not work on long doubles.
283 AC_DEFUN([LIBGFOR_CHECK_FOR_BROKEN_ISFINITE], [
284 AC_CACHE_CHECK([whether isfinite is broken],
285 have_broken_isfinite, [
286 libgfor_check_for_broken_isfinite_save_LIBS=$LIBS
297 if (!isfinite(LDBL_MAX)) return 1;
300 if (!isfinite(DBL_MAX)) return 1;
304 }], have_broken_isfinite=no, have_broken_isfinite=yes, [
306 hppa*-*-hpux*) have_broken_isfinite=yes ;;
307 *) have_broken_isfinite=no ;;
309 LIBS=$libgfor_check_for_broken_isfinite_save_LIBS)
310 if test x"$have_broken_isfinite" = xyes; then
311 AC_DEFINE(HAVE_BROKEN_ISFINITE, 1, [Define if isfinite is broken.])
314 dnl Check whether isnan is broken.
315 dnl The most common problem is that it does not work on long doubles.
316 AC_DEFUN([LIBGFOR_CHECK_FOR_BROKEN_ISNAN], [
317 AC_CACHE_CHECK([whether isnan is broken],
319 libgfor_check_for_broken_isnan_save_LIBS=$LIBS
332 x = __builtin_nanl ("");
333 if (!isnan(x)) return 1;
334 if (isnan(LDBL_MAX)) return 1;
336 x = (long double) NAN;
337 if (!isnan(x)) return 1;
344 y = __builtin_nan ("");
345 if (!isnan(y)) return 1;
346 if (isnan(DBL_MAX)) return 1;
349 if (!isnan(y)) return 1;
355 }], have_broken_isnan=no, have_broken_isnan=yes, [
357 hppa*-*-hpux*) have_broken_isnan=yes ;;
358 *) have_broken_isnan=no ;;
360 LIBS=$libgfor_check_for_broken_isnan_save_LIBS)
361 if test x"$have_broken_isnan" = xyes; then
362 AC_DEFINE(HAVE_BROKEN_ISNAN, 1, [Define if isnan is broken.])
365 dnl Check whether fpclassify is broken.
366 dnl The most common problem is that it does not work on long doubles.
367 AC_DEFUN([LIBGFOR_CHECK_FOR_BROKEN_FPCLASSIFY], [
368 AC_CACHE_CHECK([whether fpclassify is broken],
369 have_broken_fpclassify, [
370 libgfor_check_for_broken_fpclassify_save_LIBS=$LIBS
381 if (fpclassify(LDBL_MAX) == FP_NAN
382 || fpclassify(LDBL_MAX) == FP_INFINITE) return 1;
385 if (fpclassify(DBL_MAX) == FP_NAN
386 || fpclassify(DBL_MAX) == FP_INFINITE) return 1;
390 }], have_broken_fpclassify=no, have_broken_fpclassify=yes, [
392 hppa*-*-hpux*) have_broken_fpclassify=yes ;;
393 *) have_broken_fpclassify=no ;;
395 LIBS=$libgfor_check_for_broken_fpclassify_save_LIBS)
396 if test x"$have_broken_fpclassify" = xyes; then
397 AC_DEFINE(HAVE_BROKEN_FPCLASSIFY, 1, [Define if fpclassify is broken.])
400 dnl Check whether the st_ino and st_dev stat fields taken together uniquely
401 dnl identify the file within the system. This is should be true for POSIX
402 dnl systems; it is known to be false on mingw32.
403 AC_DEFUN([LIBGFOR_CHECK_WORKING_STAT], [
404 AC_CACHE_CHECK([whether the target stat is reliable],
408 #include <sys/types.h>
409 #include <sys/stat.h>
415 struct stat st1, st2;
417 f = fopen ("foo", "w");
418 g = fopen ("bar", "w");
419 if (stat ("foo", &st1) != 0 || stat ("bar", &st2))
421 if (st1.st_dev == st2.st_dev && st1.st_ino == st2.st_ino)
426 }], have_working_stat=yes, have_working_stat=no, [
428 *mingw*) have_working_stat=no ;;
429 *) have_working_stat=yes;;
431 if test x"$have_working_stat" = xyes; then
432 AC_DEFINE(HAVE_WORKING_STAT, 1, [Define if target has a reliable stat.])
435 dnl Checks for fpsetmask function.
436 AC_DEFUN([LIBGFOR_CHECK_FPSETMASK], [
437 AC_CACHE_CHECK([whether fpsetmask is present], have_fpsetmask, [
439 #if HAVE_FLOATINGPOINT_H
440 # include <floatingpoint.h>
441 #endif /* HAVE_FLOATINGPOINT_H */
444 #endif /* HAVE_IEEEFP_H */],[fpsetmask(0);],
445 eval "have_fpsetmask=yes", eval "have_fpsetmask=no")
447 if test x"$have_fpsetmask" = xyes; then
448 AC_DEFINE(HAVE_FPSETMASK, 1, [Define if you have fpsetmask.])