svn commit: r344899 - stable/12

[Ed Maste]

Author: emaste
Date: Thu Mar  7 21:30:26 2019
New Revision: 344899
URL: https://svnweb.freebsd.org/changeset/base/344899

Log:
  Add UPDATING entry for r344898 - RETPOLINE BROKEN_OPTIONS
  
  Sponsored by:	The FreeBSD Foundation

Modified:
  stable/12/UPDATING

Modified: stable/12/UPDATING
==============================================================================
--- stable/12/UPDATING	Thu Mar  7 20:40:39 2019	(r344898)
+++ stable/12/UPDATING	Thu Mar  7 21:30:26 2019	(r344899)
@@ -16,6 +16,11 @@ from older versions of FreeBSD, try WITHOUT_CLANG and 
 the tip of head, and then rebuild without this option. The bootstrap process
 from older version of current across the gcc/clang cutover is a bit fragile.
 
+20190307:
+	The RETPOLINE option produces non-functional ifunc-using binaries
+	with Clang 7.0.1, and has been forced off (via BROKEN_OPTIONS).
+	Once Clang 8 is merged it may be enabled again.
+
 20190216:
 	Clang, llvm, lld, lldb, compiler-rt and libc++ have been upgraded to
 	7.0.1.  Please see the 20141231 entry below for information about