strftime.m4

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#serial 17

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 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_DEFINE([my_strftime], [nstrftime],
   [Define to the name of the strftime replacement function.])
])

AC_DEFUN([jm_FUNC_STRFTIME],
[
  _jm_STRFTIME_PREREQS
])