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From: Glen Barber <gjb@FreeBSD.org>
Date: Fri, 21 Oct 2016 16:43:14 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r307739 - stable/11/release/doc/en_US.ISO8859-1/errata
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Author: gjb
Date: Fri Oct 21 16:43:13 2016
New Revision: 307739
URL: https://svnweb.freebsd.org/changeset/base/307739

Log:
  Document an issue with clang and source-based upgrades from
  10.2 and earlier.
  
  Submitted by:	imp
  Sponsored by:	The FreeBSD Foundation

Modified:
  stable/11/release/doc/en_US.ISO8859-1/errata/article.xml

Modified: stable/11/release/doc/en_US.ISO8859-1/errata/article.xml
==============================================================================
--- stable/11/release/doc/en_US.ISO8859-1/errata/article.xml	Fri Oct 21 16:42:39 2016	(r307738)
+++ stable/11/release/doc/en_US.ISO8859-1/errata/article.xml	Fri Oct 21 16:43:13 2016	(r307739)
@@ -247,6 +247,19 @@ boot</screen>
 	  so space can be reclaimed to increase the size of the
 	  freebsd-boot partition.</para>
       </listitem>
+
+      <listitem>
+	<para>[2016-10-21] Due to a bug in earlier versions of
+	  &man.clang.1; that are difficult to work around in the
+	  upgrade process, to upgrade the system from sources via
+	  buildworld to -CURRENT or &release;, it is necessary to
+	  upgrade machines running 9.x to at least revision r286035,
+	  or machines running 10.x to revision r286033.  Source-based
+	  upgrades from 10.3-RELEASE are not affected.  This differs
+	  from the historical situation where one could generally
+	  upgrade from anywhere on earlier stable branches, so caution
+	  should be exercised.</para>
+      </listitem>
     </itemizedlist>
   </sect1>