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acl: Avoid test failure on Cygwin-hosted mingw.
[gnulib.git]
/
m4
/
isfinite.m4
diff --git
a/m4/isfinite.m4
b/m4/isfinite.m4
index
055ba82
..
dfdbc3e
100644
(file)
--- a/
m4/isfinite.m4
+++ b/
m4/isfinite.m4
@@
-1,5
+1,5
@@
-# isfinite.m4 serial
4
-dnl Copyright (C) 2007-20
09
Free Software Foundation, Inc.
+# isfinite.m4 serial
7
+dnl Copyright (C) 2007-20
10
Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
@@
-30,7
+30,6
@@
AC_DEFUN([gl_ISFINITE],
AC_LIBOBJ([isfinite])
ISFINITE_LIBM=
fi
AC_LIBOBJ([isfinite])
ISFINITE_LIBM=
fi
- AC_SUBST([REPLACE_ISFINITE])
AC_SUBST([ISFINITE_LIBM])
])
AC_SUBST([ISFINITE_LIBM])
])
@@
-48,7
+47,7
@@
AC_DEFUN([gl_ISFINITEL_WORKS],
AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
AC_CACHE_CHECK([whether isfinite(long double) works], [gl_cv_func_isfinitel_works],
[
AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
AC_CACHE_CHECK([whether isfinite(long double) works], [gl_cv_func_isfinitel_works],
[
- AC_
TRY_RUN(
[
+ AC_
RUN_IFELSE([AC_LANG_SOURCE([
[
#include <float.h>
#include <limits.h>
#include <math.h>
#include <float.h>
#include <limits.h>
#include <math.h>
@@
-56,6
+55,17
@@
AC_DEFUN([gl_ISFINITEL_WORKS],
((sizeof (long double) + sizeof (unsigned int) - 1) / sizeof (unsigned int))
typedef union { unsigned int word[NWORDS]; long double value; }
memory_long_double;
((sizeof (long double) + sizeof (unsigned int) - 1) / sizeof (unsigned int))
typedef union { unsigned int word[NWORDS]; long double value; }
memory_long_double;
+/* On Irix 6.5, gcc 3.4.3 can't compute compile-time NaN, and needs the
+ runtime type conversion. */
+#ifdef __sgi
+static long double NaNl ()
+{
+ double zero = 0.0;
+ return zero / zero;
+}
+#else
+# define NaNl() (0.0L / 0.0L)
+#endif
int main ()
{
memory_long_double m;
int main ()
{
memory_long_double m;
@@
-65,7
+75,7
@@
int main ()
in the mantissa bits. The xor operation twiddles a bit that can only be
a sign bit or a mantissa bit (since the exponent never extends to
bit 31). */
in the mantissa bits. The xor operation twiddles a bit that can only be
a sign bit or a mantissa bit (since the exponent never extends to
bit 31). */
- m.value =
0.0L / 0.0L
;
+ m.value =
NaNl ()
;
m.word[NWORDS / 2] ^= (unsigned int) 1 << (sizeof (unsigned int) * CHAR_BIT - 1);
for (i = 0; i < NWORDS; i++)
m.word[i] |= 1;
m.word[NWORDS / 2] ^= (unsigned int) 1 << (sizeof (unsigned int) * CHAR_BIT - 1);
for (i = 0; i < NWORDS; i++)
m.word[i] |= 1;
@@
-138,7
+148,7
@@
int main ()
#endif
return 0;
#endif
return 0;
-}], [gl_cv_func_isfinitel_works=yes], [gl_cv_func_isfinitel_works=no],
+}]
])]
, [gl_cv_func_isfinitel_works=yes], [gl_cv_func_isfinitel_works=no],
[case "$host_cpu" in
# Guess no on ia64, x86_64, i386.
ia64 | x86_64 | i*86) gl_cv_func_isnanl_works="guessing no";;
[case "$host_cpu" in
# Guess no on ia64, x86_64, i386.
ia64 | x86_64 | i*86) gl_cv_func_isnanl_works="guessing no";;