-#serial 7
-dnl Copyright (C) 2002, 2003, 2005 Free Software Foundation, Inc.
+# serial 25
+dnl Copyright (C) 2002-2003, 2005-2007, 2009-2014 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,
dnl with or without modifications, as long as this notice is preserved.
dnl From Jim Meyering.
-# Redefine AC_FUNC_MKTIME, to fix a bug in Autoconf 2.57 and earlier.
-# This redefinition can be removed once a new version of Autoconf comes out.
-# The redefinition is taken from
-# <http://savannah.gnu.org/cgi-bin/viewcvs/*checkout*/autoconf/autoconf/lib/autoconf/functions.m4?rev=1.78>.
-# AC_FUNC_MKTIME
-# --------------
-AC_DEFUN([AC_FUNC_MKTIME],
-[AC_REQUIRE([AC_HEADER_TIME])dnl
-AC_CHECK_HEADERS_ONCE(sys/time.h)
-AC_CHECK_FUNCS_ONCE(alarm)
-AC_CACHE_CHECK([for working mktime], ac_cv_func_working_mktime,
-[AC_RUN_IFELSE([AC_LANG_SOURCE(
+AC_DEFUN([gl_FUNC_MKTIME],
+[
+ AC_REQUIRE([gl_HEADER_TIME_H_DEFAULTS])
+
+ dnl We don't use AC_FUNC_MKTIME any more, because it is no longer maintained
+ dnl in Autoconf and because it invokes AC_LIBOBJ.
+ AC_CHECK_HEADERS_ONCE([unistd.h])
+ AC_CHECK_DECLS_ONCE([alarm])
+ AC_REQUIRE([gl_MULTIARCH])
+ if test $APPLE_UNIVERSAL_BUILD = 1; then
+ # A universal build on Apple Mac OS X platforms.
+ # The test result would be 'yes' in 32-bit mode and 'no' in 64-bit mode.
+ # But we need a configuration result that is valid in both modes.
+ gl_cv_func_working_mktime=no
+ fi
+ AC_CACHE_CHECK([for working mktime], [gl_cv_func_working_mktime],
+ [AC_RUN_IFELSE(
+ [AC_LANG_SOURCE(
[[/* Test program from Paul Eggert and Tony Leneis. */
-#if TIME_WITH_SYS_TIME
-# include <sys/time.h>
-# include <time.h>
-#else
-# if HAVE_SYS_TIME_H
-# include <sys/time.h>
-# else
-# include <time.h>
-# endif
-#endif
-
+#include <limits.h>
#include <stdlib.h>
-#include <unistd.h>
+#include <time.h>
+
+#ifdef HAVE_UNISTD_H
+# include <unistd.h>
+#endif
-#if !HAVE_ALARM
-# define alarm(X) /* empty */
+#if HAVE_DECL_ALARM
+# include <signal.h>
#endif
/* Work around redefinition to rpl_putenv by other config tests. */
};
#define N_STRINGS (sizeof (tz_strings) / sizeof (tz_strings[0]))
-/* Fail if mktime fails to convert a date in the spring-forward gap.
+/* Return 0 if mktime fails to convert a date in the spring-forward gap.
Based on a problem report from Andreas Jaeger. */
-static void
+static int
spring_forward_gap ()
{
/* glibc (up to about 1998-10-07) failed this test. */
tm.tm_min = 0;
tm.tm_sec = 0;
tm.tm_isdst = -1;
- if (mktime (&tm) == (time_t)-1)
- exit (1);
+ return mktime (&tm) != (time_t) -1;
}
-static void
-mktime_test1 (now)
- time_t now;
+static int
+mktime_test1 (time_t now)
{
struct tm *lt;
- if ((lt = localtime (&now)) && mktime (lt) != now)
- exit (1);
+ return ! (lt = localtime (&now)) || mktime (lt) == now;
}
-static void
-mktime_test (now)
- time_t now;
+static int
+mktime_test (time_t now)
{
- mktime_test1 (now);
- mktime_test1 ((time_t) (time_t_max - now));
- mktime_test1 ((time_t) (time_t_min + now));
+ return (mktime_test1 (now)
+ && mktime_test1 ((time_t) (time_t_max - now))
+ && mktime_test1 ((time_t) (time_t_min + now)));
}
-static void
+static int
irix_6_4_bug ()
{
/* Based on code from Ariel Faigon. */
tm.tm_sec = 0;
tm.tm_isdst = -1;
mktime (&tm);
- if (tm.tm_mon != 2 || tm.tm_mday != 31)
- exit (1);
+ return tm.tm_mon == 2 && tm.tm_mday == 31;
}
-static void
-bigtime_test (j)
- int j;
+static int
+bigtime_test (int j)
{
struct tm tm;
time_t now;
{
struct tm *lt = localtime (&now);
if (! (lt
- && lt->tm_year == tm.tm_year
- && lt->tm_mon == tm.tm_mon
- && lt->tm_mday == tm.tm_mday
- && lt->tm_hour == tm.tm_hour
- && lt->tm_min == tm.tm_min
- && lt->tm_sec == tm.tm_sec
- && lt->tm_yday == tm.tm_yday
- && lt->tm_wday == tm.tm_wday
- && ((lt->tm_isdst < 0 ? -1 : 0 < lt->tm_isdst)
- == (tm.tm_isdst < 0 ? -1 : 0 < tm.tm_isdst))))
- exit (1);
+ && lt->tm_year == tm.tm_year
+ && lt->tm_mon == tm.tm_mon
+ && lt->tm_mday == tm.tm_mday
+ && lt->tm_hour == tm.tm_hour
+ && lt->tm_min == tm.tm_min
+ && lt->tm_sec == tm.tm_sec
+ && lt->tm_yday == tm.tm_yday
+ && lt->tm_wday == tm.tm_wday
+ && ((lt->tm_isdst < 0 ? -1 : 0 < lt->tm_isdst)
+ == (tm.tm_isdst < 0 ? -1 : 0 < tm.tm_isdst))))
+ return 0;
}
+ return 1;
+}
+
+static int
+year_2050_test ()
+{
+ /* The correct answer for 2050-02-01 00:00:00 in Pacific time,
+ ignoring leap seconds. */
+ unsigned long int answer = 2527315200UL;
+
+ struct tm tm;
+ time_t t;
+ tm.tm_year = 2050 - 1900;
+ tm.tm_mon = 2 - 1;
+ tm.tm_mday = 1;
+ tm.tm_hour = tm.tm_min = tm.tm_sec = 0;
+ tm.tm_isdst = -1;
+
+ /* Use the portable POSIX.1 specification "TZ=PST8PDT,M4.1.0,M10.5.0"
+ instead of "TZ=America/Vancouver" in order to detect the bug even
+ on systems that don't support the Olson extension, or don't have the
+ full zoneinfo tables installed. */
+ putenv ("TZ=PST8PDT,M4.1.0,M10.5.0");
+
+ t = mktime (&tm);
+
+ /* Check that the result is either a failure, or close enough
+ to the correct answer that we can assume the discrepancy is
+ due to leap seconds. */
+ return (t == (time_t) -1
+ || (0 < t && answer - 120 <= t && t <= answer + 120));
}
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);
+#if HAVE_DECL_ALARM
/* This test makes some buggy mktime implementations loop.
Give up after 60 seconds; a mktime slower than that
isn't worth using anyway. */
+ signal (SIGALRM, SIG_DFL);
alarm (60);
+#endif
+
+ 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);
- for (time_t_max = 1; 0 < time_t_max; time_t_max *= 2)
- continue;
- time_t_max--;
- if ((time_t) -1 < 0)
- for (time_t_min = -1; (time_t) (time_t_min * 2) < 0; time_t_min *= 2)
- continue;
delta = time_t_max / 997; /* a suitable prime number */
for (i = 0; i < N_STRINGS; i++)
{
if (tz_strings[i])
- putenv (tz_strings[i]);
-
- for (t = 0; t <= time_t_max - delta; t += delta)
- mktime_test (t);
- mktime_test ((time_t) 1);
- mktime_test ((time_t) (60 * 60));
- mktime_test ((time_t) (60 * 60 * 24));
-
- for (j = 1; 0 < j; j *= 2)
- bigtime_test (j);
- bigtime_test (j - 1);
+ putenv (tz_strings[i]);
+
+ for (t = 0; t <= time_t_max - delta && (result & 1) == 0; t += delta)
+ if (! mktime_test (t))
+ result |= 1;
+ if ((result & 2) == 0
+ && ! (mktime_test ((time_t) 1)
+ && mktime_test ((time_t) (60 * 60))
+ && mktime_test ((time_t) (60 * 60 * 24))))
+ result |= 2;
+
+ for (j = 1; (result & 4) == 0; j <<= 1)
+ {
+ if (! bigtime_test (j))
+ result |= 4;
+ if (INT_MAX / 2 < j)
+ break;
+ }
+ if ((result & 8) == 0 && ! bigtime_test (INT_MAX))
+ result |= 8;
}
- irix_6_4_bug ();
- spring_forward_gap ();
- exit (0);
+ 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],
- [ac_cv_func_working_mktime=no])])
-if test $ac_cv_func_working_mktime = no; then
- AC_LIBOBJ([mktime])
-fi
-])# AC_FUNC_MKTIME
+ [gl_cv_func_working_mktime=yes],
+ [gl_cv_func_working_mktime=no],
+ [gl_cv_func_working_mktime=no])
+ ])
+
+ if test $gl_cv_func_working_mktime = no; then
+ REPLACE_MKTIME=1
+ else
+ REPLACE_MKTIME=0
+ fi
+])
-AC_DEFUN([gl_FUNC_MKTIME],
-[
- AC_REQUIRE([AC_FUNC_MKTIME])
- if test $ac_cv_func_working_mktime = no; then
- AC_DEFINE(mktime, rpl_mktime,
- [Define to rpl_mktime if the replacement function should be used.])
- gl_PREREQ_MKTIME
+AC_DEFUN([gl_FUNC_MKTIME_INTERNAL], [
+ AC_REQUIRE([gl_FUNC_MKTIME])
+ if test $REPLACE_MKTIME = 0; then
+ dnl BeOS has __mktime_internal in libc, but other platforms don't.
+ AC_CHECK_FUNC([__mktime_internal],
+ [AC_DEFINE([mktime_internal], [__mktime_internal],
+ [Define to the real name of the mktime_internal function.])
+ ],
+ [dnl mktime works but it doesn't export __mktime_internal,
+ dnl so we need to substitute our own mktime implementation.
+ REPLACE_MKTIME=1
+ ])
fi
])
projects / gnulib.git / blobdiff