(svn r27675) -Fix [FS#6502]: [OSX] Building with 10.11 or 10.12 SDKs.

src/os/macosx/osx_stdafx.h

@@ -13,6 +13,17 @@
 #define MACOS_STDAFX_H
 
 
+#include <AvailabilityMacros.h>
+
+/* We assume if these macros are defined, the SDK is also at least this version or later. */
+#ifdef MAC_OS_X_VERSION_10_7
+#define HAVE_OSX_107_SDK
+#endif
+
+#ifdef MAC_OS_X_VERSION_10_11
+#define HAVE_OSX_1011_SDK
+#endif
+
 /* It would seem that to ensure backward compability we have to ensure that we have defined MAC_OS_X_VERSION_10_x everywhere */
 #ifndef MAC_OS_X_VERSION_10_3
 #define MAC_OS_X_VERSION_10_3 1030
@@ -57,8 +68,6 @@
 #	error "Compiling 64 bits without _SQ64 set! (or vice versa)"
 #endif
 
-#include <AvailabilityMacros.h>
-
 /* Name conflict */
 #define Rect        OTTDRect
 #define Point       OTTDPoint