The SHA512 extension test fails with: ``` crypto/sha: FAIL src/test/test_crypto.c:432: assert(d_out1 OP_EQ d_out2): DE642E63D5B73FC396C12BE38B2BD5D884257C32 vs 17807C728EE3BA35E7CF7AF823116D26E41E5D4D [sha FAILED] ``` with x86_64 and i386 clang on OS X: ``` Apple LLVM version 7.0.0 (clang-700.1.76) ``` and x86_64 clang on Linux: ``` Ubuntu clang version 3.4-1ubuntu3 (tags/RELEASE_34/final) (based on LLVM 3.4) ``` But gcc works fine on Linux: ``` gcc version 4.8.4 (Ubuntu 4.8.4-2ubuntu1~14.04) ```