[src/trunk]: src add a note about GCC 8.3 import probably needing cleaning.

[mrg <mrg%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/e45d03061560
branches:  trunk
changeset: 1003794:e45d03061560
user:      mrg <mrg%NetBSD.org@localhost>
date:      Tue Oct 01 09:36:56 2019 +0000

description:
add a note about GCC 8.3 import probably needing cleaning.

diffstat:

 UPDATING |  8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)

diffs (22 lines):

diff -r 7bdacdfe4df4 -r e45d03061560 UPDATING
--- a/UPDATING  Tue Oct 01 09:36:01 2019 +0000
+++ b/UPDATING  Tue Oct 01 09:36:56 2019 +0000
@@ -1,4 +1,4 @@
-$NetBSD: UPDATING,v 1.302 2019/09/03 15:38:52 riastradh Exp $
+$NetBSD: UPDATING,v 1.303 2019/10/01 09:36:56 mrg 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
@@ -19,6 +19,12 @@
 Recent changes:
 ^^^^^^^^^^^^^^^
 
+20191001:
+
+       GCC 8.3 was imported.  Builds of src/tools/gcc may fail if
+       old builds with GCC 7 output now uses GCC 8.  Clean this
+       directory, and also clean src/external/gpl3/gcc.
+
 20190903:
 
        File with names that coincide with existing files' names on