fcatomic: Fix EXC_BAD_ACCESS on iOS ARM64
iPhone 2.1 was released a long time ago, and the macro for checking
the target iOS SDK version has changed. We can simplify everything and
do a very basic check.
diff --git a/src/fcatomic.h b/src/fcatomic.h
index cc28a88..657a5f5 100644
--- a/src/fcatomic.h
+++ b/src/fcatomic.h
@@ -70,24 +70,16 @@
#elif !defined(FC_NO_MT) && defined(__APPLE__)
#include <libkern/OSAtomic.h>
-#ifdef __MAC_OS_X_MIN_REQUIRED
#include <AvailabilityMacros.h>
-#elif defined(__IPHONE_OS_MIN_REQUIRED)
-#include <Availability.h>
-#endif
typedef int fc_atomic_int_t;
#define fc_atomic_int_add(AI, V) (OSAtomicAdd32Barrier ((V), &(AI)) - (V))
#define fc_atomic_ptr_get(P) (OSMemoryBarrier (), (void *) *(P))
-#if (MAC_OS_X_VERSION_MIN_REQUIRED > MAC_OS_X_VERSION_10_4 || __IPHONE_VERSION_MIN_REQUIRED >= 20100)
+#if (MAC_OS_X_VERSION_MIN_REQUIRED > MAC_OS_X_VERSION_10_4 || __IPHONE_OS_VERSION_MIN_REQUIRED >= 20100)
#define fc_atomic_ptr_cmpexch(P,O,N) OSAtomicCompareAndSwapPtrBarrier ((void *) (O), (void *) (N), (void **) (P))
#else
-#if __ppc64__ || __x86_64__
-#define fc_atomic_ptr_cmpexch(P,O,N) OSAtomicCompareAndSwap64Barrier ((int64_t) (O), (int64_t) (N), (int64_t*) (P))
-#else
-#define fc_atomic_ptr_cmpexch(P,O,N) OSAtomicCompareAndSwap32Barrier ((int32_t) (O), (int32_t) (N), (int32_t*) (P))
-#endif
+#error "Your macOS / iOS targets are too old"
#endif
#elif !defined(FC_NO_MT) && defined(HAVE_INTEL_ATOMIC_PRIMITIVES)
