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===================================================================
RCS file: /ftp/cvs/cvsroot/src/UPDATING,v
rcsdiff: /ftp/cvs/cvsroot/src/UPDATING,v: warning: Unknown phrases like `commitid ...;' are present.
retrieving revision 1.222
retrieving revision 1.223
diff -u -p -r1.222 -r1.223
--- src/UPDATING	2011/04/10 08:29:31	1.222
+++ src/UPDATING	2011/04/10 20:22:32	1.223
@@ -1,4 +1,4 @@
-$NetBSD: UPDATING,v 1.222 2011/04/10 08:29:31 plunky Exp $
+$NetBSD: UPDATING,v 1.223 2011/04/10 20:22:32 joerg Exp $
 
 This file (UPDATING) is intended to be a brief reference to recent
 changes that might cause problems in the build process, and a guide for
@@ -15,6 +15,11 @@ See also: BUILDING, build.sh, Makefile.
 
 Recent changes:
 ^^^^^^^^^^^^^^^
+20110410:
+	The configuration of src/tools/gcc has changed. Update builds
+	have to remove the stale content explicitly. See the note toward
+	the end of the file for details.
+
 20110328:
 	Building the Xorg binary was moved into a subdirectory to fix
 	ordering issues with "make all". It may be necessary to remove
@@ -540,3 +545,7 @@ Fix:    Rebuild and install lib/libc
 
 Symptom:lint does not understand the '-X' option
 Fix:    May need to build & install libs with NOLINT=1 before rebuilding lint
+
+Symptom:Update build fails in src/tools/gcc complaining that a variable
+	(e.g. CPPFLAGS) has changed since the previous run.
+Fix:    Run "nbmake-${ARCH} clean" in src/tools/gcc or do a clean build.