A second version of
http://www.redhat.com/archives/libvir-list/2011-April/msg00060.html
In this version:
- Move acinclude.m4 into m4/
- Don't blacklist -W, only use -Wno-sign-compare
- Fix some issues allowing further warnings to be turned on
- Increase max stack size to 65700 bytes to make test suite
compile. Test suite to be fixed later :-)