This directory contains external projects, taken from the following locations:
cryptopp:
 - vendor_cryptopp: https://github.com/weidai11/cryptopp/tree/CRYPTOPP_8_9_0
 - vendor_cryptopp_cmake: https://github.com/abdes/cryptopp-cmake/tree/CRYPTOPP_8_9_0
   - Added workaround to find OpenMP on MacOS: https://github.com/abdes/cryptopp-cmake/pull/126
   - Fix building on PowerPC: https://github.com/cryfs/cryfs/pull/506
