$NetBSD$

--- configure.in.orig	2000-10-19 16:35:15.000000000 +0900
+++ configure.in	2006-12-07 15:08:35.000000000 +0900
@@ -10,7 +10,7 @@
   CPPFLAGS="${CPPFLAGS} -DNDEBUG"
 fi
 
-CPPFLAGS="${CPPFLAGS} -D_GNU_SOURCE -D_XOPEN_SOURCE"
+CPPFLAGS="${CPPFLAGS} -D_GNU_SOURCE"
 LDFLAGS="${LDFLAGS}"
 
 dnl Checks for programs.
