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Add note about known code generate error in gcc6809 patches
author William Astle <lost@l-w.ca>
date Thu, 24 Mar 2016 19:08:25 -0600
parents 5dc9f9d47064
children 8222f30a0781
files extra/README
diffstat 1 files changed, 13 insertions(+), 0 deletions(-) [+]
line wrap: on
line diff
--- 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
 ============================