link error with build on High Sierra OSX

[spiralus]

Undefined symbols for architecture x86_64:
"_SHA256", referenced from:
uint256 HashSkein<char*>(char*, char*) in libbitcoinconsensus_la-pureheader.o
(maybe you meant: _PBKDF2_SHA256, _HMAC_SHA256_Update_Y , _SHA256_Final_Y , _SHA256_Update_Y , _SHA256_Init_Y , _HMAC_SHA256_Final_Y , __ZN12CHMAC_SHA256C1EPKhm , _HMAC_SHA256_Init_Y , __ZN12CHMAC_SHA2568FinalizeEPh , __ZN12CHMAC_SHA256C2EPKhm )
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
m
make[2]: *** [libbitcoinconsensus.la] Error 1