2 dnl * If we have gettimeofday;
3 dnl * If we have struct timezone for use in calling it;
4 dnl * If calling it with a timezone pointer actually works -- this is deemed
5 dnl obsolete or undefined on some systems which say you should use a null
6 dnl pointer -- and undefine HAVE_TIMEZONE if so;
7 dnl * Whether it only takes one arg.
8 AC_DEFUN([LIBGFOR_GETTIMEOFDAY], [
9 AC_CHECK_FUNCS(gettimeofday)
10 if test "$ac_cv_func_gettimeofday" = yes; then
11 AC_CACHE_CHECK([for struct timezone], gfor_cv_struct_timezone,
12 [AC_TRY_COMPILE([#include <sys/time.h>],
13 [struct timezone tz;],
14 gfor_cv_struct_timezone=yes, gfor_cv_struct_timezone=no)])
15 if test $gfor_cv_struct_timezone = yes; then
16 dnl It may be that we can't call gettimeofday with a non-null pointer.
17 dnl In that case we'll lie about struct timezone.
19 #ifdef TIME_WITH_SYS_TIME
23 #ifdef HAVE_SYS_TIME_H
32 struct timezone dummy;
33 if (gettimeofday (&time, &dummy))
38 [gfor_have_struct_timezone=yes], [gfor_have_struct_timezone=no],
39 [gfor_have_struct_timezone=yes])
40 if test $gfor_have_struct_timezone = yes; then
41 AC_DEFINE(HAVE_TIMEZONE, 1, [Do we have struct timezone])
44 AC_REQUIRE([AC_HEADER_TIME])
45 AC_CACHE_CHECK([whether gettimeofday can accept two arguments],
46 emacs_cv_gettimeofday_two_arguments,
48 #ifdef TIME_WITH_SYS_TIME
52 #ifdef HAVE_SYS_TIME_H
62 struct timezone dummy;
67 gettimeofday (&time, DUMMY);],
68 emacs_cv_gettimeofday_two_arguments=yes,
69 emacs_cv_gettimeofday_two_arguments=no)])
70 if test $emacs_cv_gettimeofday_two_arguments = no; then
71 AC_DEFINE(GETTIMEOFDAY_ONE_ARGUMENT, 1,
72 [Does gettimeofday take a single argument])
76 sinclude(../libtool.m4)
77 dnl The lines below arrange for aclocal not to bring an installed
78 dnl libtool.m4 into aclocal.m4, while still arranging for automake to
79 dnl add a definition of LIBTOOL to Makefile.in.
80 ifelse(,,,[AC_SUBST(LIBTOOL)
81 AC_DEFUN([AM_PROG_LIBTOOL])
82 AC_DEFUN([AC_LIBTOOL_DLOPEN])
83 AC_DEFUN([AC_PROG_LD])
86 dnl Check whether the target is ILP32.
87 AC_DEFUN([LIBGFOR_TARGET_ILP32], [
88 AC_CACHE_CHECK([whether the target is ILP32], target_ilp32, [
92 if (sizeof(int) == 4 && sizeof(long) == 4 && sizeof(void *) == 4)
95 undefined_function ();
99 CFLAGS="$save_CFLAGS"])
100 if test $target_ilp32 = yes; then
101 AC_DEFINE(TARGET_ILP32, 1,
102 [Define to 1 if the target is ILP32.])
106 dnl Check whether the target supports hidden visibility.
107 AC_DEFUN([LIBGFOR_CHECK_ATTRIBUTE_VISIBILITY], [
108 AC_CACHE_CHECK([whether the target supports hidden visibility],
109 have_attribute_visibility, [
110 save_CFLAGS="$CFLAGS"
111 CFLAGS="$CFLAGS -Werror"
112 AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }],
113 [], have_attribute_visibility=yes,
114 have_attribute_visibility=no)
115 CFLAGS="$save_CFLAGS"])
116 if test $have_attribute_visibility = yes; then
117 AC_DEFINE(HAVE_ATTRIBUTE_VISIBILITY, 1,
118 [Define to 1 if the target supports __attribute__((visibility(...))).])
121 dnl Check whether the target supports dllexport
122 AC_DEFUN([LIBGFOR_CHECK_ATTRIBUTE_DLLEXPORT], [
123 AC_CACHE_CHECK([whether the target supports dllexport],
124 have_attribute_dllexport, [
125 save_CFLAGS="$CFLAGS"
126 CFLAGS="$CFLAGS -Werror"
127 AC_TRY_COMPILE([void __attribute__((dllexport)) foo(void) { }],
128 [], have_attribute_dllexport=yes,
129 have_attribute_dllexport=no)
130 CFLAGS="$save_CFLAGS"])
131 if test $have_attribute_dllexport = yes; then
132 AC_DEFINE(HAVE_ATTRIBUTE_DLLEXPORT, 1,
133 [Define to 1 if the target supports __attribute__((dllexport)).])
136 dnl Check whether the target supports symbol aliases.
137 AC_DEFUN([LIBGFOR_CHECK_ATTRIBUTE_ALIAS], [
138 AC_CACHE_CHECK([whether the target supports symbol aliases],
139 have_attribute_alias, [
141 #define ULP STR1(__USER_LABEL_PREFIX__)
142 #define STR1(x) STR2(x)
145 extern void bar(void) __attribute__((alias(ULP "foo")));],
146 [bar();], have_attribute_alias=yes, have_attribute_alias=no)])
147 if test $have_attribute_alias = yes; then
148 AC_DEFINE(HAVE_ATTRIBUTE_ALIAS, 1,
149 [Define to 1 if the target supports __attribute__((alias(...))).])
152 dnl Check whether the target supports __sync_fetch_and_add.
153 AC_DEFUN([LIBGFOR_CHECK_SYNC_FETCH_AND_ADD], [
154 AC_CACHE_CHECK([whether the target supports __sync_fetch_and_add],
155 have_sync_fetch_and_add, [
156 AC_TRY_LINK([int foovar = 0;], [
157 if (foovar <= 0) return __sync_fetch_and_add (&foovar, 1);
158 if (foovar > 10) return __sync_add_and_fetch (&foovar, -1);],
159 have_sync_fetch_and_add=yes, have_sync_fetch_and_add=no)])
160 if test $have_sync_fetch_and_add = yes; then
161 AC_DEFINE(HAVE_SYNC_FETCH_AND_ADD, 1,
162 [Define to 1 if the target supports __sync_fetch_and_add])
165 dnl Check if threads are supported.
166 AC_DEFUN([LIBGFOR_CHECK_GTHR_DEFAULT], [
167 AC_CACHE_CHECK([configured target thread model],
168 target_thread_file, [
169 target_thread_file=`$CC -v 2>&1 | sed -n 's/^Thread model: //p'`])
171 if test $target_thread_file != single; then
172 AC_DEFINE(HAVE_GTHR_DEFAULT, 1,
173 [Define if the compiler has a thread header that is non single.])
176 dnl Check for pragma weak.
177 AC_DEFUN([LIBGFOR_CHECK_PRAGMA_WEAK], [
178 AC_CACHE_CHECK([whether pragma weak works],
180 gfor_save_CFLAGS="$CFLAGS"
181 CFLAGS="$CFLAGS -Wunknown-pragmas"
182 AC_TRY_COMPILE([void foo (void);
183 #pragma weak foo], [if (foo) foo ();],
184 have_pragma_weak=yes, have_pragma_weak=no)])
185 if test $have_pragma_weak = yes; then
186 AC_DEFINE(HAVE_PRAGMA_WEAK, 1,
187 [Define to 1 if the target supports #pragma weak])
190 dnl Check whether target can unlink a file still open.
191 AC_DEFUN([LIBGFOR_CHECK_UNLINK_OPEN_FILE], [
192 AC_CACHE_CHECK([whether the target can unlink an open file],
193 have_unlink_open_file, [
198 #include <sys/stat.h>
204 fd = open ("testfile", O_RDWR | O_CREAT, S_IWRITE | S_IREAD);
207 if (unlink ("testfile") == -1)
209 write (fd, "This is a test\n", 15);
212 if (open ("testfile", O_RDONLY, S_IWRITE | S_IREAD) == -1 && errno == ENOENT)
216 }], have_unlink_open_file=yes, have_unlink_open_file=no, [
218 *mingw*) have_unlink_open_file=no ;;
219 *) have_unlink_open_file=yes;;
221 if test x"$have_unlink_open_file" = xyes; then
222 AC_DEFINE(HAVE_UNLINK_OPEN_FILE, 1, [Define if target can unlink open files.])
225 dnl Check whether CRLF is the line terminator
226 AC_DEFUN([LIBGFOR_CHECK_CRLF], [
227 AC_CACHE_CHECK([whether the target has CRLF as line terminator],
230 /* This test program should exit with status 0 if system uses a CRLF as
231 line terminator, and status 1 otherwise.
232 Since it is used to check for mingw systems, and should return 0 in any
233 other case, in case of a failure we will not use CRLF. */
234 #include <sys/stat.h>
247 fd = open ("foo", O_WRONLY | O_CREAT | O_TRUNC, S_IRWXU);
250 if (write (fd, "\n", 1) < 0)
255 if ((fd = open ("foo", O_RDONLY | O_BINARY, S_IRWXU)) < 0)
257 bytes = read (fd, buff, 5);
258 if (bytes == 2 && buff[0] == '\r' && buff[1] == '\n')
263 }], have_crlf=yes, have_crlf=no, [
265 *mingw*) have_crlf=yes ;;
268 if test x"$have_crlf" = xyes; then
269 AC_DEFINE(HAVE_CRLF, 1, [Define if CRLF is line terminator.])
272 dnl Check whether isfinite is broken.
273 dnl The most common problem is that it does not work on long doubles.
274 AC_DEFUN([LIBGFOR_CHECK_FOR_BROKEN_ISFINITE], [
275 AC_CACHE_CHECK([whether isfinite is broken],
276 have_broken_isfinite, [
277 libgfor_check_for_broken_isfinite_save_LIBS=$LIBS
288 if (!isfinite(LDBL_MAX)) return 1;
291 if (!isfinite(DBL_MAX)) return 1;
295 }], have_broken_isfinite=no, have_broken_isfinite=yes, [
297 hppa*-*-hpux*) have_broken_isfinite=yes ;;
298 *) have_broken_isfinite=no ;;
300 LIBS=$libgfor_check_for_broken_isfinite_save_LIBS)
301 if test x"$have_broken_isfinite" = xyes; then
302 AC_DEFINE(HAVE_BROKEN_ISFINITE, 1, [Define if isfinite is broken.])
305 dnl Check whether isnan is broken.
306 dnl The most common problem is that it does not work on long doubles.
307 AC_DEFUN([LIBGFOR_CHECK_FOR_BROKEN_ISNAN], [
308 AC_CACHE_CHECK([whether isnan is broken],
310 libgfor_check_for_broken_isnan_save_LIBS=$LIBS
323 x = __builtin_nanl ("");
324 if (!isnan(x)) return 1;
325 if (isnan(LDBL_MAX)) return 1;
327 x = (long double) NAN;
328 if (!isnan(x)) return 1;
335 y = __builtin_nan ("");
336 if (!isnan(y)) return 1;
337 if (isnan(DBL_MAX)) return 1;
340 if (!isnan(y)) return 1;
346 }], have_broken_isnan=no, have_broken_isnan=yes, [
348 hppa*-*-hpux*) have_broken_isnan=yes ;;
349 *) have_broken_isnan=no ;;
351 LIBS=$libgfor_check_for_broken_isnan_save_LIBS)
352 if test x"$have_broken_isnan" = xyes; then
353 AC_DEFINE(HAVE_BROKEN_ISNAN, 1, [Define if isnan is broken.])
356 dnl Check whether fpclassify is broken.
357 dnl The most common problem is that it does not work on long doubles.
358 AC_DEFUN([LIBGFOR_CHECK_FOR_BROKEN_FPCLASSIFY], [
359 AC_CACHE_CHECK([whether fpclassify is broken],
360 have_broken_fpclassify, [
361 libgfor_check_for_broken_fpclassify_save_LIBS=$LIBS
372 if (fpclassify(LDBL_MAX) == FP_NAN
373 || fpclassify(LDBL_MAX) == FP_INFINITE) return 1;
376 if (fpclassify(DBL_MAX) == FP_NAN
377 || fpclassify(DBL_MAX) == FP_INFINITE) return 1;
381 }], have_broken_fpclassify=no, have_broken_fpclassify=yes, [
383 hppa*-*-hpux*) have_broken_fpclassify=yes ;;
384 *) have_broken_fpclassify=no ;;
386 LIBS=$libgfor_check_for_broken_fpclassify_save_LIBS)
387 if test x"$have_broken_fpclassify" = xyes; then
388 AC_DEFINE(HAVE_BROKEN_FPCLASSIFY, 1, [Define if fpclassify is broken.])
391 dnl Check whether the st_ino and st_dev stat fields taken together uniquely
392 dnl identify the file within the system. This is should be true for POSIX
393 dnl systems; it is known to be false on mingw32.
394 AC_DEFUN([LIBGFOR_CHECK_WORKING_STAT], [
395 AC_CACHE_CHECK([whether the target stat is reliable],
399 #include <sys/types.h>
400 #include <sys/stat.h>
406 struct stat st1, st2;
408 f = fopen ("foo", "w");
409 g = fopen ("bar", "w");
410 if (stat ("foo", &st1) != 0 || stat ("bar", &st2))
412 if (st1.st_dev == st2.st_dev && st1.st_ino == st2.st_ino)
417 }], have_working_stat=yes, have_working_stat=no, [
419 *mingw*) have_working_stat=no ;;
420 *) have_working_stat=yes;;
422 if test x"$have_working_stat" = xyes; then
423 AC_DEFINE(HAVE_WORKING_STAT, 1, [Define if target has a reliable stat.])
426 dnl Checks for fpsetmask function.
427 AC_DEFUN([LIBGFOR_CHECK_FPSETMASK], [
428 AC_CACHE_CHECK([whether fpsetmask is present], have_fpsetmask, [
430 #if HAVE_FLOATINGPOINT_H
431 # include <floatingpoint.h>
432 #endif /* HAVE_FLOATINGPOINT_H */
435 #endif /* HAVE_IEEEFP_H */],[fpsetmask(0);],
436 eval "have_fpsetmask=yes", eval "have_fpsetmask=no")
438 if test x"$have_fpsetmask" = xyes; then
439 AC_DEFINE(HAVE_FPSETMASK, 1, [Define if you have fpsetmask.])