1. a caching wrapper around compilers to speed up compilations Compilercache is a wrapper around your C and C++ compilers. Each time you compile something, the wrapper puts the result of the compilation into a cache. And once you compile the same thing again, the result will be picked from the cache instead of being recompiled. Care is taken to ensure that compilation with and without compilercache always results in identical object files. From Debian 3.0r0 APT