It no longer compiles on ARM on version 0.16

[varosi]

GHC 7.10.2, Debian Jessie, ARMv7, gcc (Debian 4.9.2-10) 4.9.2

[103 of 103] Compiling Crypto.Cipher.AES ( Crypto/Cipher/AES.hs, dist/build/Crypto/Cipher/AES.o )
cbits/cryptonite_rdrand.c: In function ‘cryptonite_cpu_has_rdrand’:

cbits/cryptonite_rdrand.c:40:2:
error: impossible constraint in ‘asm’
asm volatile ("cpuid": "=a" (ax), "=b" (bx), "=c" (cx), "=d" (dx) : "a" (func));
^
Failed to install cryptonite-0.16

[varosi]

cryptonite-0.15 works fine

[centromere]

Possible duplicate of #88.

[vincenthz]

hm. fixed in 32aec08. @centromere: looks like you removed the x86_64 guard that was present. rdrand shouldn't be tried on anything non-x86

[centromere]

@vincenthz The reason for this change was that, if I turned off rdrand, ARCH_X86_64 would never get defined. It doesn't seem logical to me that x86_64 support would be predicated upon rdrand.

The PR you just merged in is similar to what I proposed in the rdrand-fix branch.

[vincenthz]

@centromere: the first part of the change make perfect sense, indeed X86_64 support should have been separate just like you made it. I missed the side effect of moving it instead of copying it.