Package ccache-2.4-20

ccache acts as a caching pre-processor to C/C++ compilers, using the -E compiler switch and a hash to detect when a compilation can be satisfied from cache. This often results in a 5 to 10 times speedup in common compilations. If you wish ccache to be the default compiler (to override and send ALL compilations through ccache), install the "ccache-default" package.