In this file:

src/plugins/preauth/spake/edwards25519_fiat.h

The following code fails to compile on RH 6.5 (gcc 4.4)

typedef signed __int128 fiat_25519_int128;
typedef unsigned __int128 fiat_25519_uint128;

Changing the typedefs as follows appears to work on both old and newer 
versions of gcc:


typedef  __int128_t fiat_25519_int128;
typedef  __uint128_t fiat_25519_uint128;

Norm Green
GemTalk Systems LLC