dnl Checks for header files.
AC_HEADER_STDC
AC_HEADER_DIRENT
-AC_CHECK_HEADERS(stdint.h inttypes.h libgen.h features.h sys/stat.h sys/types.h fcntl.h fp_class.h malloc.h unistd.h ieeefp.h math.h sys/times.h sys/param.h sys/resource.h signal.h float.h stdio.h stdlib.h errno.h string.h ctype.h)
+AC_CHECK_HEADERS(langinfo.h stdint.h inttypes.h libgen.h features.h sys/stat.h sys/types.h fcntl.h fp_class.h malloc.h unistd.h ieeefp.h math.h sys/times.h sys/param.h sys/resource.h signal.h float.h stdio.h stdlib.h errno.h string.h ctype.h)
dnl Checks for typedefs, structures, and compiler characteristics.
AC_C_CONST
dnl for each function found we get a definition in config.h
dnl of the form HAVE_FUNCTION
-AC_CHECK_FUNCS(tzset fsync mbstowcs opendir readdir chdir chroot getuid strerror snprintf vsnprintf vasprintf fpclass class fp_class isnan memmove strchr mktime getrusage gettimeofday)
+AC_CHECK_FUNCS(nl_langinfo tzset fsync mbstowcs opendir readdir chdir chroot getuid strerror snprintf vsnprintf vasprintf fpclass class fp_class isnan memmove strchr mktime getrusage gettimeofday)
AC_FUNC_STRERROR_R
CHECK_FOR_WORKING_MS_ASYNC
+dnl do we have nl_langinfo(_NL_TIME_WEEK_1STDAY)
+AC_CHECK_FUNCS(_NL_TIME_WEEK_1STDAY, ,
+ [AC_MSG_CHECKING([for nl_langinfo(_NL_TIME_WEEK_1STDAY) with langinfo.h])
+ AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <langinfo.h>]], [[nl_langinfo(_NL_TIME_WEEK_1STDAY)]])],[AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE__NL_TIME_WEEK_1STDAY)],[AC_MSG_RESULT(no)])])
+
dnl Do we need getopt_long
dnl even when including our own getopt implementation