-# serial 16
-dnl Copyright (C) 2002-2003, 2005-2007, 2009-2010 Free Software Foundation,
+# serial 19
+dnl Copyright (C) 2002-2003, 2005-2007, 2009-2011 Free Software Foundation,
dnl Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
int
main ()
{
+ int result = 0;
time_t t, delta;
int i, j;
+ int time_t_signed_magnitude = (time_t) ~ (time_t) 0 < (time_t) -1;
+ int time_t_signed = ! ((time_t) 0 < (time_t) -1);
/* This test makes some buggy mktime implementations loop.
Give up after 60 seconds; a mktime slower than that
isn't worth using anyway. */
alarm (60);
- for (;;)
- {
- t = (time_t_max << 1) + 1;
- if (t <= time_t_max)
- break;
- time_t_max = t;
- }
- time_t_min = - ((time_t) ~ (time_t) 0 == (time_t) -1) - time_t_max;
+ time_t_max = (! time_t_signed
+ ? (time_t) -1
+ : ((((time_t) 1 << (sizeof (time_t) * CHAR_BIT - 2)) - 1)
+ * 2 + 1));
+ time_t_min = (! time_t_signed
+ ? (time_t) 0
+ : time_t_signed_magnitude
+ ? ~ (time_t) 0
+ : ~ time_t_max);
delta = time_t_max / 997; /* a suitable prime number */
for (i = 0; i < N_STRINGS; i++)
for (t = 0; t <= time_t_max - delta; t += delta)
if (! mktime_test (t))
- return 1;
+ result |= 1;
if (! (mktime_test ((time_t) 1)
&& mktime_test ((time_t) (60 * 60))
&& mktime_test ((time_t) (60 * 60 * 24))))
- return 1;
+ result |= 2;
for (j = 1; ; j <<= 1)
if (! bigtime_test (j))
- return 1;
+ result |= 4;
else if (INT_MAX / 2 < j)
break;
if (! bigtime_test (INT_MAX))
- return 1;
+ result |= 8;
}
- return ! (irix_6_4_bug () && spring_forward_gap () && year_2050_test ());
+ if (! irix_6_4_bug ())
+ result |= 16;
+ if (! spring_forward_gap ())
+ result |= 32;
+ if (! year_2050_test ())
+ result |= 64;
+ return result;
}]])],
[ac_cv_func_working_mktime=yes],
[ac_cv_func_working_mktime=no],