I can compile the Crypto++ 5.6.0 ASM SHA code with MinGW but as soon as it runs it crashes. It says its for MASM (Microsoft's assembler) and the sample command line they give looks like Visual C++. Does it only work with the MSVC and Intel compilers?
I recently also made an attempt to use Crypto++ 5.6.0 (as an external library) instead of the old integrated code, with the same result - it crashed on the first invocation of CryptoPP::SHA256::Transform. Only I built everything with VC++ 2008. I haven't investigated in depth, but someone mentioned Crypto++'s routine required aligned input - maybe that's the reason, or we may have other bug we don't figure.