- provide cpp wrapper using cc -E
- provide c++_r wrapper working like c++
- provide -rpath handling for cc
- fix some debug messages to provide the correct script name
- Add cc_r/xlc_r wrapper using the same rules as xlc itself.
It is used for example by Perl.
- Improve the RPATH emulation:
- Always set -blibpath, use /usr/lib:/lib as default
- If -blibpath is exlicitly given, add to the default
- Additionally append any -Wl,-rpath given.