Florian Krohm 6dce653240 Add support for building with -fsanitize=undefined.
- add configure option --enable-ubsan 
- add __ubsan helpers (by Julian)

This requires gcc 4.9.2 or later. Not all platforms are supported, though.
With this change and VEX r3099 regression tests pass on amd64
with a valgrind compiled with -fsanitize=undefined.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@14995
2015-03-10 16:13:59 +00:00
..
2011-11-11 04:04:12 +00:00