[src/trunk]: src Mention setenv lossage.

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

details:   https://anonhg.NetBSD.org/src/rev/b6723cb217b6
branches:  trunk
changeset: 759043:b6723cb217b6
user:      christos <christos%NetBSD.org@localhost>
date:      Thu Nov 25 22:08:49 2010 +0000

description:
Mention setenv lossage.

diffstat:

 UPDATING |  12 +++++++++++-
 1 files changed, 11 insertions(+), 1 deletions(-)

diffs (26 lines):

diff -r 6eb8990cb784 -r b6723cb217b6 UPDATING
--- a/UPDATING  Thu Nov 25 21:37:04 2010 +0000
+++ b/UPDATING  Thu Nov 25 22:08:49 2010 +0000
@@ -1,4 +1,4 @@
-$NetBSD: UPDATING,v 1.215 2010/11/23 06:49:29 mrg Exp $
+$NetBSD: UPDATING,v 1.216 2010/11/25 22:08:49 christos 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 +15,16 @@
 
 Recent changes:
 ^^^^^^^^^^^^^^^
+20101125:
+       The latest changes to setenv(3) dissallow setting environment
+       variables with names that contain '='. Revision 1.18 of env.c
+       assumed that this was allowed. Installing a new libc with an
+       old copy of /usr/bin/env causes env x=1 printenv | grep x= to
+       break which affects the autoconf tests for dependency finding,
+       so building gcc will end up printing:
+           checking dependency style of gcc... none
+           configure: error: no usable dependency style found
+       Fix it by rebuilding and re-installing env.
 
 20101119:
        Recent Xorg updates in xsrc/external/mit/ may cause various build