Bug 615052 - intrinsics and 64-bit atomics code fails to compile
     on PA-RISC
    
    https://bugzilla.redhat.com/show_bug.cgi?id=615052
    
    Description by Ulf Weltman (ulf.weltman@hp.com):
    PA-RISC doesn't have instructions for atomic manipulation of 64-bit integers,
    so use pthread mutex to protect this code.  That code is already there, we just
    need to make sure ATOMIC_64BIT_OPERATIONS is not set for PA-RISC.
    
    Also, pragma INLINE for listing functions that should be inlined is not
    supported by PA-RISC's compiler.  Using the __inline keyword works with both
    PA-RISC and IA64 compilers in ANSI C mode.
    
    Note: configure has been regenerated with autogen.sh script on F-14.