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#serial 11
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)
AC_CHECK_HEADERS(limits.h)
AC_CHECK_FUNCS(bcopy tzset mempcpy memcpy memset)
# This defines (or not) HAVE_TZNAME and HAVE_TM_ZONE.
AC_STRUCT_TIMEZONE
AC_CHECK_FUNCS(mblen mbrlen)
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>])
])
dnl Determine if the strftime function has all the features of the GNU one.
dnl
dnl From Jim Meyering.
dnl
AC_DEFUN(jm_FUNC_GNU_STRFTIME,
[AC_REQUIRE([AC_HEADER_TIME])dnl
_jm_STRFTIME_PREREQS
AC_REQUIRE([AC_C_CONST])dnl
AC_REQUIRE([AC_HEADER_STDC])dnl
AC_CHECK_HEADERS(sys/time.h)
AC_CACHE_CHECK([for working GNU strftime], jm_cv_func_working_gnu_strftime,
[# Set TZ to GMT0 to make strftime give consistent results during the test.
ac_save_TZ="${TZ-GMT0}"
TZ=GMT0
export TZ
AC_TRY_RUN(
[ /* Ulrich Drepper provided parts of the test program. */
#if STDC_HEADERS
# include <stdlib.h>
#endif
#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
static int
compare (const char *fmt, const struct tm *tm, const char *expected)
{
char buf[99];
strftime (buf, 99, fmt, tm);
if (strcmp (buf, expected))
{
#ifdef SHOW_FAILURES
printf ("fmt: \"%s\", expected \"%s\", got \"%s\"\n",
fmt, expected, buf);
#endif
return 1;
}
return 0;
}
int
main ()
{
int n_fail = 0;
struct tm *tm;
time_t t = 738367; /* Fri Jan 9 13:06:07 1970 */
tm = gmtime (&t);
#undef CMP
#define CMP(Fmt, Expected) n_fail += compare ((Fmt), tm, (Expected))
CMP ("%-m", "1"); /* GNU */
CMP ("%A", "Friday");
CMP ("%^A", "FRIDAY"); /* The ^ is a GNU extension. */
CMP ("%B", "January");
CMP ("%^B", "JANUARY");
CMP ("%C", "19"); /* POSIX.2 */
CMP ("%D", "01/09/70"); /* POSIX.2 */
CMP ("%F", "1970-01-09");
CMP ("%G", "1970"); /* GNU */
CMP ("%H", "13");
CMP ("%I", "01");
CMP ("%M", "06");
CMP ("%M", "06");
CMP ("%R", "13:06"); /* POSIX.2 */
CMP ("%S", "07");
CMP ("%T", "13:06:07"); /* POSIX.2 */
CMP ("%U", "01");
CMP ("%V", "02");
CMP ("%W", "01");
CMP ("%X", "13:06:07");
CMP ("%Y", "1970");
CMP ("%Z", "GMT");
CMP ("%_m", " 1"); /* GNU */
CMP ("%a", "Fri");
CMP ("%^a", "FRI");
CMP ("%b", "Jan");
CMP ("%^b", "JAN");
CMP ("%c", "Fri Jan 9 13:06:07 1970");
CMP ("%^c", "FRI JAN 9 13:06:07 1970");
CMP ("%d", "09");
CMP ("%e", " 9"); /* POSIX.2 */
CMP ("%g", "70"); /* GNU */
CMP ("%h", "Jan"); /* POSIX.2 */
CMP ("%^h", "JAN");
CMP ("%j", "009");
CMP ("%k", "13"); /* GNU */
CMP ("%l", " 1"); /* GNU */
CMP ("%m", "01");
CMP ("%n", "\n"); /* POSIX.2 */
CMP ("%p", "PM");
CMP ("%r", "01:06:07 PM"); /* POSIX.2 */
CMP ("%s", "738367"); /* GNU */
CMP ("%t", "\t"); /* POSIX.2 */
CMP ("%u", "5"); /* POSIX.2 */
CMP ("%w", "5");
CMP ("%x", "01/09/70");
CMP ("%y", "70");
CMP ("%z", "+0000"); /* GNU */
exit (n_fail ? 1 : 0);
}],
jm_cv_func_working_gnu_strftime=yes,
jm_cv_func_working_gnu_strftime=no,
dnl When crosscompiling, assume strftime is missing or broken.
jm_cv_func_working_gnu_strftime=no)
dnl If TZ wasn't set before, this sets it to GMT0. No real harm done.
TZ="$ac_save_TZ"
])
if test $jm_cv_func_working_gnu_strftime = no; then
AC_SUBST(LIBOBJS)
LIBOBJS="$LIBOBJS strftime.$ac_objext"
AC_DEFINE_UNQUOTED(strftime, gnu_strftime,
[Define to gnu_strftime if the replacement function should be used.])
fi
])
AC_DEFUN(jm_FUNC_STRFTIME,
[
_jm_STRFTIME_PREREQS
AC_REPLACE_FUNCS(strftime)
])
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