GNULIB_NANOSLEEP=0; AC_SUBST([GNULIB_NANOSLEEP])
GNULIB_STRPTIME=0; AC_SUBST([GNULIB_STRPTIME])
GNULIB_TIMEGM=0; AC_SUBST([GNULIB_TIMEGM])
+ GNULIB_TIME_R=0; AC_SUBST([GNULIB_TIME_R])
dnl If another module says to replace or to not replace, do that.
dnl Otherwise, replace only if someone compiles with -DGNULIB_PORTCHECK;
dnl this lets maintainers check for portability.