fi
])
+# mktime.m4 serial 2
+dnl Copyright (C) 2002, 2003 Free Software Foundation, Inc.
+dnl This file is free software, distributed under the terms of the GNU
+dnl General Public License. As a special exception to the GNU General
+dnl Public License, this file may be distributed as part of a program
+dnl that contains a configuration script generated by Autoconf, under
+dnl the same distribution terms as the rest of that program.
+
+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(stdlib.h sys/time.h unistd.h)
+AC_CHECK_FUNCS(alarm)
+AC_CACHE_CHECK([for working mktime], ac_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
+
+#if HAVE_STDLIB_H
+# include <stdlib.h>
+#endif
+
+#if HAVE_UNISTD_H
+# include <unistd.h>
+#endif
+
+#if !HAVE_ALARM
+# define alarm(X) /* empty */
+#endif
+
+/* Work around redefinition to rpl_putenv by other config tests. */
+#undef putenv
+
+static time_t time_t_max;
+static time_t time_t_min;
+
+/* Values we'll use to set the TZ environment variable. */
+static char *tz_strings[] = {
+ (char *) 0, "TZ=GMT0", "TZ=JST-9",
+ "TZ=EST+3EDT+2,M10.1.0/00:00:00,M2.3.0/00:00:00"
+};
+#define N_STRINGS (sizeof (tz_strings) / sizeof (tz_strings[0]))
+
+/* Fail if mktime fails to convert a date in the spring-forward gap.
+ Based on a problem report from Andreas Jaeger. */
+static void
+spring_forward_gap ()
+{
+ /* glibc (up to about 1998-10-07) failed this test. */
+ struct tm tm;
+
+ /* 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");
+
+ tm.tm_year = 98;
+ tm.tm_mon = 3;
+ tm.tm_mday = 5;
+ tm.tm_hour = 2;
+ tm.tm_min = 0;
+ tm.tm_sec = 0;
+ tm.tm_isdst = -1;
+ if (mktime (&tm) == (time_t)-1)
+ exit (1);
+}
+
+static void
+mktime_test1 (now)
+ time_t now;
+{
+ struct tm *lt;
+ if ((lt = localtime (&now)) && mktime (lt) != now)
+ exit (1);
+}
+
+static void
+mktime_test (now)
+ time_t now;
+{
+ mktime_test1 (now);
+ mktime_test1 ((time_t) (time_t_max - now));
+ mktime_test1 ((time_t) (time_t_min + now));
+}
+
+static void
+irix_6_4_bug ()
+{
+ /* Based on code from Ariel Faigon. */
+ struct tm tm;
+ tm.tm_year = 96;
+ tm.tm_mon = 3;
+ tm.tm_mday = 0;
+ tm.tm_hour = 0;
+ tm.tm_min = 0;
+ tm.tm_sec = 0;
+ tm.tm_isdst = -1;
+ mktime (&tm);
+ if (tm.tm_mon != 2 || tm.tm_mday != 31)
+ exit (1);
+}
+
+static void
+bigtime_test (j)
+ int j;
+{
+ struct tm tm;
+ time_t now;
+ tm.tm_year = tm.tm_mon = tm.tm_mday = tm.tm_hour = tm.tm_min = tm.tm_sec = j;
+ now = mktime (&tm);
+ if (now != (time_t) -1)
+ {
+ 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);
+ }
+}
+
+int
+main ()
+{
+ time_t t, delta;
+ int i, j;
+
+ /* 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 (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);
+ }
+ irix_6_4_bug ();
+ spring_forward_gap ();
+ exit (0);
+}]])],
+ [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
+
+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
+ fi
+])
+
+# Prerequisites of lib/mktime.c.
+AC_DEFUN([gl_PREREQ_MKTIME], [
+ AC_REQUIRE([AC_HEADER_STDC])
+ AC_CHECK_HEADERS_ONCE(limits.h)
+])
+
#serial 7
dnl From Jim Meyering.
fi
])
-#serial 17
+#serial 20
dnl This macro is intended to be used solely in this file.
dnl These are the prerequisite macros for GNU's strftime.c replacement.
AC_DEFUN([_jm_STRFTIME_PREREQS],
[
- dnl strftime.c uses localtime_r and the underyling system strftime
- dnl if they exist.
- AC_CHECK_FUNCS(localtime_r strftime)
+ dnl strftime.c uses the underyling system strftime if it exists.
+ AC_FUNC_STRFTIME
- AC_CHECK_HEADERS(limits.h)
- AC_CHECK_FUNCS(bcopy tzset mempcpy memcpy memset)
+ AC_CHECK_HEADERS_ONCE(limits.h)
+ AC_CHECK_FUNCS_ONCE(memcpy mempcpy)
+ AC_CHECK_FUNCS(tzset memset)
# This defines (or not) HAVE_TZNAME and HAVE_TM_ZONE.
AC_STRUCT_TIMEZONE
AC_CHECK_FUNCS(mblen mbrlen)
+ AC_TYPE_MBSTATE_T
- AC_CHECK_MEMBER([struct tm.tm_gmtoff],
- [AC_DEFINE(HAVE_TM_GMTOFF, 1,
- [Define if struct tm has the tm_gmtoff member.])],
- ,
- [#include <time.h>])
+ AC_REQUIRE([gl_TM_GMTOFF])
+ AC_REQUIRE([gl_FUNC_TZSET_CLOBBER])
])
dnl From Jim Meyering.
AC_REQUIRE([AC_C_CONST])dnl
AC_REQUIRE([AC_HEADER_STDC])dnl
- AC_CHECK_HEADERS(sys/time.h)
+ AC_CHECK_HEADERS_ONCE(sys/time.h)
AC_DEFINE([my_strftime], [nstrftime],
[Define to the name of the strftime replacement function.])
])
_jm_STRFTIME_PREREQS
])
+# tm_gmtoff.m4 serial 1
+dnl Copyright (C) 2002 Free Software Foundation, Inc.
+dnl This file is free software, distributed under the terms of the GNU
+dnl General Public License. As a special exception to the GNU General
+dnl Public License, this file may be distributed as part of a program
+dnl that contains a configuration script generated by Autoconf, under
+dnl the same distribution terms as the rest of that program.
+
+AC_DEFUN([gl_TM_GMTOFF],
+[
+ AC_CHECK_MEMBER([struct tm.tm_gmtoff],
+ [AC_DEFINE(HAVE_TM_GMTOFF, 1,
+ [Define if struct tm has the tm_gmtoff member.])],
+ ,
+ [#include <time.h>])
+])
+
+#serial 1
+# See if we have a working tzset function.
+# If so, arrange to compile the wrapper function.
+# For at least Solaris 2.5.1 and 2.6, this is necessary
+# because tzset can clobber the contents of the buffer
+# used by localtime.
+
+# Written by Paul Eggert and Jim Meyering.
+
+AC_DEFUN([gl_FUNC_TZSET_CLOBBER],
+[
+ AC_REQUIRE([AC_HEADER_TIME])
+ AC_CACHE_CHECK([whether tzset clobbers localtime buffer],
+ gl_cv_func_tzset_clobber,
+ [
+ AC_RUN_IFELSE([AC_LANG_SOURCE([[
+#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 <stdlib.h>
+
+int
+main ()
+{
+ time_t t1 = 853958121;
+ struct tm *p, s;
+ putenv ("TZ=GMT0");
+ p = localtime (&t1);
+ s = *p;
+ putenv ("TZ=EST+3EDT+2,M10.1.0/00:00:00,M2.3.0/00:00:00");
+ tzset ();
+ exit (p->tm_year != s.tm_year
+ || p->tm_mon != s.tm_mon
+ || p->tm_mday != s.tm_mday
+ || p->tm_hour != s.tm_hour
+ || p->tm_min != s.tm_min
+ || p->tm_sec != s.tm_sec);
+}
+ ]])],
+ [gl_cv_func_tzset_clobber=no],
+ [gl_cv_func_tzset_clobber=yes],
+ [gl_cv_func_tzset_clobber=yes])])
+
+ AC_DEFINE(HAVE_RUN_TZSET_TEST, 1,
+ [Define to 1 if you have run the test for working tzset.])
+
+ if test $gl_cv_func_tzset_clobber = yes; then
+ AC_LIBOBJ(gettimeofday)
+ AC_DEFINE(localtime, rpl_localtime,
+ [Define to rpl_localtime if the replacement function should be used.])
+ AC_DEFINE(tzset, rpl_tzset,
+ [Define to rpl_tzset if the wrapper function should be used.])
+ AC_DEFINE(TZSET_CLOBBERS_LOCALTIME_BUFFER, 1,
+ [Define if tzset clobbers localtime's static buffer.])
+ fi
+])
+
#serial 3
dnl From Jim Meyering
projects / thirdparty / coreutils.git / commitdiff
