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
unsigned char out[128];
        TransformD64_4way(out, data + 1);
        if (!std::equal(out, out + 128, result_d64)) return false;
    }
    
    if (TransformD64_8way) {
        unsigned char out[256];
        TransformD64_8way(out, data + 1);
        if (!std::equal(out, out + 256, result_d64)) return false;
    }
    return true;
}
#if defined(USE_ASM) && (defined(__x86_64__) || defined(__amd64__) || defined(__i386__))
void inline cpuid(uint32_t leaf, uint32_t subleaf, uint32_t& a, uint32_t& b, uint32_t& c, uint32_t& d)
{
  __asm__ ("cpuid" : "=a"(a), "=b"(b), "=c"(c), "=d"(d) : "0"(leaf), "2"(subleaf));
}
bool AVXEnabled()
{
    uint32_t a, d;
    __asm__("xgetbv" : "=a"(a), "=d"(d) : "c"(0));
    return (a & 6) == 6;
}
#endif
} 
std::string SHA256AutoDetect()
{
    std::string ret = "standard";
#if defined(USE_ASM) && (defined(__x86_64__) || defined(__amd64__) || defined(__i386__))
    (void)AVXEnabled;