-# isnand.m4 serial 7
-dnl Copyright (C) 2007-2010 Free Software Foundation, Inc.
+# isnand.m4 serial 11
+dnl Copyright (C) 2007-2011 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.
else
gl_func_isnand=no
HAVE_ISNAND=0
- gl_BUILD_ISNAND
fi
AC_SUBST([ISNAND_LIBM])
])
AC_DEFUN([gl_FUNC_ISNAND_NO_LIBM],
[
gl_HAVE_ISNAND_NO_LIBM
+ gl_func_isnand_no_libm=$gl_cv_func_isnand_no_libm
if test $gl_cv_func_isnand_no_libm = yes; then
AC_DEFINE([HAVE_ISNAND_IN_LIBC], [1],
[Define if the isnan(double) function is available in libc.])
- else
- gl_BUILD_ISNAND
fi
])
-dnl Pull in replacement isnand definition. It does not need -lm.
-AC_DEFUN([gl_BUILD_ISNAND],
+dnl Prerequisites of replacement isnand definition. It does not need -lm.
+AC_DEFUN([gl_PREREQ_ISNAND],
[
- AC_LIBOBJ([isnand])
- gl_DOUBLE_EXPONENT_LOCATION
+ AC_REQUIRE([gl_DOUBLE_EXPONENT_LOCATION])
])
dnl Test whether isnand() can be used with libm.
[[#include <math.h>
#if __GNUC__ >= 4
# undef isnand
- # define isnand(x) __builtin_isnand ((double)(x))
+ # define isnand(x) __builtin_isnan ((double)(x))
#elif defined isnan
# undef isnand
# define isnand(x) isnan ((double)(x))