-# strtod.m4 serial 10
-dnl Copyright (C) 2002-2003, 2006-2009 Free Software Foundation, Inc.
+# strtod.m4 serial 13
+dnl Copyright (C) 2002-2003, 2006-2010 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.
[AC_RUN_IFELSE([AC_LANG_PROGRAM([[
#include <stdlib.h>
#include <math.h>
+#include <errno.h>
/* Compare two numbers with ==.
This is a separate function because IRIX 6.5 "cc -O" miscompiles an
'x == x' test. */
return 1;
}
{
- /* Many platforms do not parse infinities. */
+ /* Many platforms do not parse infinities. HP-UX 11.31 parses inf,
+ but mistakenly sets errno. */
const char *string = "inf";
char *term;
- double value = strtod (string, &term);
- if (value != HUGE_VAL || term != (string + 3))
+ double value;
+ errno = 0;
+ value = strtod (string, &term);
+ if (value != HUGE_VAL || term != (string + 3) || errno)
return 1;
}
{
if (numeric_equal (value, value) || term != (string + 5))
return 1;
}
+ {
+ /* darwin 10.6.1 misparses "nan(". */
+ const char *string = "nan(";
+ char *term;
+ double value = strtod (string, &term);
+ if (numeric_equal (value, value) || term != (string + 3))
+ return 1;
+ }
]])],
- [gl_cv_func_strtod_works=yes],
- [gl_cv_func_strtod_works=no],
- [gl_cv_func_strtod_works="guessing no"])])
+ [gl_cv_func_strtod_works=yes],
+ [gl_cv_func_strtod_works=no],
+ [gl_cv_func_strtod_works="guessing no"])])
if test "$gl_cv_func_strtod_works" != yes; then
REPLACE_STRTOD=1
gl_PREREQ_STRTOD