However changes since 2.1.1 include:
# added a test suite
# better integration with distcc
# added CCACHE_PREFIX option
# disabled hard links by default
# recognise some more gcc options (eg. profiling)
# added --ccache-skip option
- fixed warning output line numbers
- added some more C++ extensions
- fixed a minor md4 hashing bug
- added support for some of the -M compiler options