Both Apple and LLVM Clang want -msse4.2 even when only SSE4.1 is used. Sidestep it because we don't know how it will affect some of the lower end Atoms.
84877:/usr/include/clang/3.5.0/include/nmmintrin.h:28:2: error: "SSE4.2 instruction set not enabled"
84878:#error "SSE4.2 instruction set not enabled"
84880:rijndael-simd.cpp:466:26: error: use of undeclared identifier '_mm_extract_epi32'; did you mean '_mm_extract_epi16'?
84887:rijndael-simd.cpp:480:11: error: use of undeclared identifier '_mm_insert_epi32'; did you mean '_mm_insert_epi16'?
84894:rijndael-simd.cpp:485:11: error: use of undeclared identifier '_mm_insert_epi32'; did you mean '_mm_insert_epi16'?
...
kalyna.cpp:432: error: integer constant is too large for 'long' type
kalyna.cpp:509: error: integer constant is too large for 'long' type
kalyna.cpp:608: error: integer constant is too large for 'long' type
kalyna.cpp:713: error: integer constant is too large for 'long' type
kalyna.cpp:833: error: integer constant is too large for 'long' type
...
getauxval() is the recommended way to determine features on Linux. Its likely less expensive than CPU probing for SIGILLs. We gave up portability, but some gained stability
rijndael-simd.cpp(318): warning C4267: 'argument': conversion from 'size_t' to 'unsigned int', possible loss of data [C:\projects\cryptopp\cryptlib.vcxproj]
rijndael-simd.cpp(376): note: see reference to function template instantiation 'size_t CryptoPP::Rijndael_AdvancedProcessBlocks_AESNI<void(__cdecl *)(__m128i &,const __m128i *,unsigned int),void(__cdecl *)(__m128i &,__m128i &,__m128i &,__m128i &,const __m128i *,unsigned int)>(F1,F4,const __m128i *,::size_t,const CryptoPP::byte *,const CryptoPP::byte *,CryptoPP::byte *,::size_t,CryptoPP::word32)' being compiled
with
[
F1=void (__cdecl *)(__m128i &,const __m128i *,unsigned int),
F4=void (__cdecl *)(__m128i &,__m128i &,__m128i &,__m128i &,const __m128i *,unsigned int)
]
rijndael-simd.cpp(355): warning C4267: 'argument': conversion from 'size_t' to 'unsigned int', possible loss of data
Jeffrey Walton