# HG changeset patch
# User William Astle <lost@l-w.ca>
# Date 1458868105 21600
# Node ID 40de99bde5e015405c5cd746911807d1e70ef505
# Parent  5dc9f9d4706472f6cd434920f2c86b30a65afbbb
Add note about known code generate error in gcc6809 patches

diff -r 5dc9f9d47064 -r 40de99bde5e0 extra/README
--- a/extra/README	Mon Mar 21 09:13:45 2016 -0600
+++ b/extra/README	Thu Mar 24 19:08:25 2016 -0600
@@ -93,6 +93,19 @@
 
 The above is WOMM certified. YMMV.
 
+NOTES ABOUT GCC6809
+===================
+
+There is one known code generation bug with current versions of gcc6809. If
+you are getting bad behaviour for some reason and are using optimization
+(-O1 or higher, -Os), you may be hitting this bug. Adding "-fno-tree-ter"
+after the "-O" options is known to correct this behaviour in some cases. If
+someone who understands the gcc code is willing to look at it, patches for
+the patch would be welcome (especially if that patch moves the base gcc
+version upward). It is not clear whether this is a bug in the m6809 specific
+code or the gcc core though it seems like it's in the gcc core.
+
+
 NOTES ABOUT SPECIFIC PATCHES
 ============================