AC_DEFUN([AC_PROG_LD])
])
+dnl Check whether the target is ILP32.
+AC_DEFUN([LIBGFOR_TARGET_ILP32], [
+ AC_CACHE_CHECK([whether the target is ILP32], target_ilp32, [
+ save_CFLAGS="$CFLAGS"
+ CFLAGS="-O2"
+ AC_TRY_LINK(,[
+if (sizeof(int) == 4 && sizeof(long) == 4 && sizeof(void *) == 4)
+ ;
+else
+ undefined_function ();
+ ],
+ target_ilp32=yes,
+ target_ilp32=no)
+ CFLAGS="$save_CFLAGS"])
+ if test $target_ilp32 = yes; then
+ AC_DEFINE(TARGET_ILP32, 1,
+ [Define to 1 if the target is ILP32.])
+ fi
+ ])
+
+dnl Check whether the target supports hidden visibility.
+AC_DEFUN([LIBGFOR_CHECK_ATTRIBUTE_VISIBILITY], [
+ AC_CACHE_CHECK([whether the target supports hidden visibility],
+ have_attribute_visibility, [
+ save_CFLAGS="$CFLAGS"
+ CFLAGS="$CFLAGS -Werror"
+ AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }],
+ [], have_attribute_visibility=yes,
+ have_attribute_visibility=no)
+ CFLAGS="$save_CFLAGS"])
+ if test $have_attribute_visibility = yes; then
+ AC_DEFINE(HAVE_ATTRIBUTE_VISIBILITY, 1,
+ [Define to 1 if the target supports __attribute__((visibility(...))).])
+ fi])
+
+dnl Check whether the target supports dllexport
+AC_DEFUN([LIBGFOR_CHECK_ATTRIBUTE_DLLEXPORT], [
+ AC_CACHE_CHECK([whether the target supports dllexport],
+ have_attribute_dllexport, [
+ save_CFLAGS="$CFLAGS"
+ CFLAGS="$CFLAGS -Werror"
+ AC_TRY_COMPILE([void __attribute__((dllexport)) foo(void) { }],
+ [], have_attribute_dllexport=yes,
+ have_attribute_dllexport=no)
+ CFLAGS="$save_CFLAGS"])
+ if test $have_attribute_dllexport = yes; then
+ AC_DEFINE(HAVE_ATTRIBUTE_DLLEXPORT, 1,
+ [Define to 1 if the target supports __attribute__((dllexport)).])
+ fi])
+
+dnl Check whether the target supports symbol aliases.
+AC_DEFUN([LIBGFOR_CHECK_ATTRIBUTE_ALIAS], [
+ AC_CACHE_CHECK([whether the target supports symbol aliases],
+ have_attribute_alias, [
+ AC_TRY_LINK([
+#define ULP STR1(__USER_LABEL_PREFIX__)
+#define STR1(x) STR2(x)
+#define STR2(x) #x
+void foo(void) { }
+extern void bar(void) __attribute__((alias(ULP "foo")));],
+ [bar();], have_attribute_alias=yes, have_attribute_alias=no)])
+ if test $have_attribute_alias = yes; then
+ AC_DEFINE(HAVE_ATTRIBUTE_ALIAS, 1,
+ [Define to 1 if the target supports __attribute__((alias(...))).])
+ fi])
+
+dnl Check whether target can unlink a file still open.
+AC_DEFUN([LIBGFOR_CHECK_UNLINK_OPEN_FILE], [
+ AC_CACHE_CHECK([whether the target can unlink an open file],
+ have_unlink_open_file, [
+ AC_TRY_RUN([
+#include <errno.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/stat.h>
+
+int main ()
+{
+ int fd;
+
+ fd = open ("testfile", O_RDWR | O_CREAT, S_IWRITE | S_IREAD);
+ if (fd <= 0)
+ return 0;
+ if (unlink ("testfile") == -1)
+ return 1;
+ write (fd, "This is a test\n", 15);
+ close (fd);
+
+ if (open ("testfile", O_RDONLY, S_IWRITE | S_IREAD) == -1 && errno == ENOENT)
+ return 0;
+ else
+ return 1;
+}], have_unlink_open_file=yes, have_unlink_open_file=no, [
+case "${target}" in
+ *mingw*) have_unlink_open_file=no ;;
+ *) have_unlink_open_file=yes;;
+esac])])
+if test x"$have_unlink_open_file" = xyes; then
+ AC_DEFINE(HAVE_UNLINK_OPEN_FILE, 1, [Define if target can unlink open files.])
+fi])
+
+dnl Check whether CRLF is the line terminator
+AC_DEFUN([LIBGFOR_CHECK_CRLF], [
+ AC_CACHE_CHECK([whether the target has CRLF as line terminator],
+ have_crlf, [
+ AC_TRY_RUN([
+/* This test program should exit with status 0 if system uses a CRLF as
+ line terminator, and status 1 otherwise.
+ Since it is used to check for mingw systems, and should return 0 in any
+ other case, in case of a failure we will not use CRLF. */
+#include <sys/stat.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <stdio.h>
+
+int main ()
+{
+#ifndef O_BINARY
+ exit(1);
+#else
+ int fd, bytes;
+ char buff[5];
+
+ fd = open ("foo", O_WRONLY | O_CREAT | O_TRUNC, S_IRWXU);
+ if (fd < 0)
+ exit(1);
+ if (write (fd, "\n", 1) < 0)
+ perror ("write");
+
+ close (fd);
+
+ if ((fd = open ("foo", O_RDONLY | O_BINARY, S_IRWXU)) < 0)
+ exit(1);
+ bytes = read (fd, buff, 5);
+ if (bytes == 2 && buff[0] == '\r' && buff[1] == '\n')
+ exit(0);
+ else
+ exit(1);
+#endif
+}], have_crlf=yes, have_crlf=no, [
+case "${target}" in
+ *mingw*) have_crlf=yes ;;
+ *) have_crlf=no;;
+esac])])
+if test x"$have_crlf" = xyes; then
+ AC_DEFINE(HAVE_CRLF, 1, [Define if CRLF is line terminator.])
+fi])
+
+dnl Check whether isfinite is broken.
+dnl The most common problem is that it does not work on long doubles.
+AC_DEFUN([LIBGFOR_CHECK_FOR_BROKEN_ISFINITE], [
+ AC_CACHE_CHECK([whether isfinite is broken],
+ have_broken_isfinite, [
+ libgfor_check_for_broken_isfinite_save_LIBS=$LIBS
+ LIBS="$LIBS -lm"
+ AC_TRY_RUN([
+#ifdef HAVE_MATH_H
+#include <math.h>
+#endif
+#include <float.h>
+int main ()
+{
+#ifdef isfinite
+#ifdef LDBL_MAX
+ if (!isfinite(LDBL_MAX)) return 1;
+#endif
+#ifdef DBL_MAX
+ if (!isfinite(DBL_MAX)) return 1;
+#endif
+#endif
+return 0;
+}], have_broken_isfinite=no, have_broken_isfinite=yes, [
+case "${target}" in
+ hppa*-*-hpux*) have_broken_isfinite=yes ;;
+ *) have_broken_isfinite=no ;;
+esac])]
+ LIBS=$libgfor_check_for_broken_isfinite_save_LIBS)
+if test x"$have_broken_isfinite" = xyes; then
+ AC_DEFINE(HAVE_BROKEN_ISFINITE, 1, [Define if isfinite is broken.])
+fi])
+
+dnl Check whether isnan is broken.
+dnl The most common problem is that it does not work on long doubles.
+AC_DEFUN([LIBGFOR_CHECK_FOR_BROKEN_ISNAN], [
+ AC_CACHE_CHECK([whether isnan is broken],
+ have_broken_isnan, [
+ libgfor_check_for_broken_isnan_save_LIBS=$LIBS
+ LIBS="$LIBS -lm"
+ AC_TRY_RUN([
+#ifdef HAVE_MATH_H
+#include <math.h>
+#endif
+#include <float.h>
+int main ()
+{
+#ifdef isnan
+#ifdef LDBL_MAX
+ {
+ long double x;
+ x = __builtin_nanl ("");
+ if (!isnan(x)) return 1;
+ if (isnan(LDBL_MAX)) return 1;
+#ifdef NAN
+ x = (long double) NAN;
+ if (!isnan(x)) return 1;
+#endif
+ }
+#endif
+#ifdef DBL_MAX
+ {
+ double y;
+ y = __builtin_nan ("");
+ if (!isnan(y)) return 1;
+ if (isnan(DBL_MAX)) return 1;
+#ifdef NAN
+ y = (double) NAN;
+ if (!isnan(y)) return 1;
+#endif
+ }
+#endif
+#endif
+return 0;
+}], have_broken_isnan=no, have_broken_isnan=yes, [
+case "${target}" in
+ hppa*-*-hpux*) have_broken_isnan=yes ;;
+ *) have_broken_isnan=no ;;
+esac])]
+ LIBS=$libgfor_check_for_broken_isnan_save_LIBS)
+if test x"$have_broken_isnan" = xyes; then
+ AC_DEFINE(HAVE_BROKEN_ISNAN, 1, [Define if isnan is broken.])
+fi])
+
+dnl Check whether fpclassify is broken.
+dnl The most common problem is that it does not work on long doubles.
+AC_DEFUN([LIBGFOR_CHECK_FOR_BROKEN_FPCLASSIFY], [
+ AC_CACHE_CHECK([whether fpclassify is broken],
+ have_broken_fpclassify, [
+ libgfor_check_for_broken_fpclassify_save_LIBS=$LIBS
+ LIBS="$LIBS -lm"
+ AC_TRY_RUN([
+#ifdef HAVE_MATH_H
+#include <math.h>
+#endif
+#include <float.h>
+int main ()
+{
+#ifdef fpclassify
+#ifdef LDBL_MAX
+ if (fpclassify(LDBL_MAX) == FP_NAN
+ || fpclassify(LDBL_MAX) == FP_INFINITE) return 1;
+#endif
+#ifdef DBL_MAX
+ if (fpclassify(DBL_MAX) == FP_NAN
+ || fpclassify(DBL_MAX) == FP_INFINITE) return 1;
+#endif
+#endif
+return 0;
+}], have_broken_fpclassify=no, have_broken_fpclassify=yes, [
+case "${target}" in
+ hppa*-*-hpux*) have_broken_fpclassify=yes ;;
+ *) have_broken_fpclassify=no ;;
+esac])]
+ LIBS=$libgfor_check_for_broken_fpclassify_save_LIBS)
+if test x"$have_broken_fpclassify" = xyes; then
+ AC_DEFINE(HAVE_BROKEN_FPCLASSIFY, 1, [Define if fpclassify is broken.])
+fi])
+
+dnl Check whether the st_ino and st_dev stat fields taken together uniquely
+dnl identify the file within the system. This is should be true for POSIX
+dnl systems; it is known to be false on mingw32.
+AC_DEFUN([LIBGFOR_CHECK_WORKING_STAT], [
+ AC_CACHE_CHECK([whether the target stat is reliable],
+ have_working_stat, [
+ AC_TRY_RUN([
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+int main ()
+{
+ FILE *f, *g;
+ struct stat st1, st2;
+
+ f = fopen ("foo", "w");
+ g = fopen ("bar", "w");
+ if (stat ("foo", &st1) != 0 || stat ("bar", &st2))
+ return 1;
+ if (st1.st_dev == st2.st_dev && st1.st_ino == st2.st_ino)
+ return 1;
+ fclose(f);
+ fclose(g);
+ return 0;
+}], have_working_stat=yes, have_working_stat=no, [
+case "${target}" in
+ *mingw*) have_working_stat=no ;;
+ *) have_working_stat=yes;;
+esac])])
+if test x"$have_working_stat" = xyes; then
+ AC_DEFINE(HAVE_WORKING_STAT, 1, [Define if target has a reliable stat.])
+fi])
+
+dnl Checks for fpsetmask function.
+AC_DEFUN([LIBGFOR_CHECK_FPSETMASK], [
+ AC_CACHE_CHECK([whether fpsetmask is present], have_fpsetmask, [
+ AC_TRY_LINK([
+#if HAVE_FLOATINGPOINT_H
+# include <floatingpoint.h>
+#endif /* HAVE_FLOATINGPOINT_H */
+#if HAVE_IEEEFP_H
+# include <ieeefp.h>
+#endif /* HAVE_IEEEFP_H */],[fpsetmask(0);],
+ eval "have_fpsetmask=yes", eval "have_fpsetmask=no")
+ ])
+ if test x"$have_fpsetmask" = xyes; then
+ AC_DEFINE(HAVE_FPSETMASK, 1, [Define if you have fpsetmask.])
+ fi
+])
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