In-house (for now) patch to allow cffi 1.5.2 to compile with both

Studio and on SPARC.

--- cffi-1.5.2/c/call_python.c.~1~ 2016-02-13 07:33:29.000000000 -0800

+++ cffi-1.5.2/c/call_python.c 2016-05-18 10:10:49.505449785 -0700

@@ -150,7 +150,8 @@ static int _update_cache_to_call_python(

#if (defined(WITH_THREAD) && !defined(_MSC_VER) && \

!defined(__amd64__) && !defined(__x86_64__) && \

!defined(__i386__) && !defined(__i386))

-# define read_barrier() __sync_synchronize()

+# include <mbarrier.h>

+# define read_barrier() __compiler_barrier()

#else

# define read_barrier() (void)0

#endif

--- cffi-1.5.2/cffi/_embedding.h.~1~ 2016-02-13 07:33:29.000000000 -0800

+++ cffi-1.5.2/cffi/_embedding.h 2016-05-18 10:15:53.285798295 -0700

@@ -32,12 +32,14 @@ static _cffi_call_python_fnptr _cffi_cal

#ifndef _MSC_VER

- /* --- Assuming a GCC not infinitely old --- */

-# define cffi_compare_and_swap(l,o,n) __sync_bool_compare_and_swap(l,o,n)

-# define cffi_write_barrier() __sync_synchronize()

+# include <atomic.h>

+# include <mbarrier.h>

+# define cffi_compare_and_swap(l,o,n) \

+ (atomic_cas_ptr((l), (o), (n)), *(l) == (n))

+# define cffi_write_barrier() __compiler_barrier()

# if !defined(__amd64__) && !defined(__x86_64__) && \

!defined(__i386__) && !defined(__i386)

-# define cffi_read_barrier() __sync_synchronize()

+# define cffi_read_barrier() __compiler_barrier()

# else

# define cffi_read_barrier() (void)0

# endif