Full log: https://bitcoin.jonasschnelli.ch/builds/667/build_linux.log
Excerpt:
```
crypto/sha256.cpp: In function ‘std::string SHA256AutoDetect()’:
crypto/sha256.cpp:537:83: error: inconsistent operand constraints in an ‘asm’
   __asm__ ("cpuid" : "=a"(a), "=b"(b), "=c"(c), "=d"(d) : "0"(leaf), "2"(subleaf));
                                                                                   ^
crypto/sha256.cpp:537:83: error: inconsistent operand constraints in an ‘asm’
   __asm__ ("cpuid" : "=a"(a), "=b"(b), "=c"(c), "=d"(d) : "0"(leaf), "2"(subleaf));
                                                                                   ^
make[2]: *** [crypto/crypto_libbitcoin_crypto_base_a-sha256.o] Error 1
make[2]: *** Waiting for unfinished jobs....
  CXXLD    libunivalue.la
make[3]: Leaving directory `/home/ubuntu/build/bitcoin/distsrc-i686-pc-linux-gnu/src/univalue'
make[2]: Leaving directory `/home/ubuntu/build/bitcoin/distsrc-i686-pc-linux-gnu/src'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/home/ubuntu/build/bitcoin/distsrc-i686-pc-linux-gnu/src'
make: *** [all-recursive] Error 1
uint32_t eax, ebx, ecx, edx;
    cpuid(1, 0, eax, ebx, ecx, edx);
    if ((ecx >> 19) & 1) {
#if defined(__x86_64__) || defined(__amd64__)
        Transform = sha256_sse4::Transform;
        TransformD64 = TransformD64Wrapper<sha256_sse4::Transform>;
#endif
#if defined(ENABLE_SSE41) && !defined(BUILD_BITCOIN_INTERNAL)
        TransformD64_4way = sha256d64_sse41::Transform_4way;
        ret = "sse4(1way+4way)";
#if defined(ENABLE_AVX2) && !defined(BUILD_BITCOIN_INTERNAL)
        if (((ecx >> 27) & 1) && ((ecx >> 28) & 1)) { 
            cpuid(7, 0, eax, ebx, ecx, edx);
            if ((ebx >> 5) & 1) { 
                if (AVXEnabled()) { 
                    TransformD64_8way = sha256d64_avx2::Transform_8way;
                    ret += ",avx2(8way)";
                }
            }
        }
#endif
#else
        ret = "sse4";
#endif
    }
#endif
    assert(SelfTest());
    return ret;
}
CSHA256::CSHA256() : bytes(0)