[pypy-commit] stmgc use-gcc: Mention -fno-ivopts

[arigo]

Author: Armin Rigo <arigo at tunes.org>
Branch: use-gcc
Changeset: r1893:a2ba6745aadd
Date: 2015-07-08 12:42 +0200
http://bitbucket.org/pypy/stmgc/changeset/a2ba6745aadd/

Log:	Mention -fno-ivopts

diff --git a/gcc-seg-gs/README.txt b/gcc-seg-gs/README.txt
--- a/gcc-seg-gs/README.txt
+++ b/gcc-seg-gs/README.txt
@@ -32,3 +32,6 @@
     #!/bin/bash
     BUILD=/..../build      # <- insert full path
     exec $BUILD/gcc/xgcc -B $BUILD/gcc "$@"
+
+GCC has a bug, likely in the "ivopts" optimization, that can be worked
+around by specifying "-fno-ivopts".