AC_FUNC_MEMCMP
AC_TYPE_SIGNAL
AC_FUNC_STRFTIME
-AC_CHECK_FUNCS(mktime select strdup strstr strtol strtok strsep snprintf)
+AC_CHECK_FUNCS(mktime select strdup strstr strtol strtok strsep snprintf vsnprintf asprintf vasprintf)
CFLAGS="$CFLAGS $NLS_CFLAGS"
LIBS="$LIBS $NLS_LIBS"