Add a note about recent GCC import.

1 files changed, 11 insertions, 0 deletions

diff --git a/UPDATING b/UPDATING
index afb3bbd..7f78302 100644
--- a/UPDATING
+++ b/UPDATING
@@ -17,6 +17,17 @@ NOTE TO PEOPLE WHO THINK THAT FreeBSD 5.x IS SLOW:
 	developers choose to disable these features on build machines
 	to maximize performance.
 
+20030728:
+	System compiler has been upgraded to GCC 3.4.2-pre. As with any major
+	compiler upgrade, there are several issues to be aware of. GCC 3.4.x
+	has broken C++ ABI compatibility with previous releases yet again
+	and users will have to rebuild all their C++ programs with the new 
+	compiler. A new unit-at-a-time optimization mode, which is default
+	in this compiler release, is more aggressive in removing unused
+	static symbols. This is the likely cause of 'make buildworld'
+	breakages with non-default CFLAGS where optimization level is set
+	to -O2 or higher.
+
 20040727:
 	The size of 'struct ifnet' has changed due to the addition of
 	the IFF_NEEDSGIANT flag (and what it implies).  All kernel