X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/c72e7103e4161c7e49979dc90674756d022926d9..91c536df157aa500e832ff9e8541839d2e07f6b4:/src/jpeg/jmorecfg.h

diff --git a/src/jpeg/jmorecfg.h b/src/jpeg/jmorecfg.h
index bc9e62b659..29b33d0235 100644
--- a/src/jpeg/jmorecfg.h
+++ b/src/jpeg/jmorecfg.h
@@ -208,25 +208,29 @@ typedef unsigned int JDIMENSION;
  * or code profilers that require it.
  */
 
-#if defined(__VISAGECPP__) /* need this for /common/imagjpeg.obj but not loclly */
-/* a function called through method pointers: */
-#define METHODDEF(type)		static type _Optlink
-/* a function used only in its module: */
-#define LOCAL(type)		static type _Optlink
-/* a function referenced thru EXTERNs: */
-#define GLOBAL(type)		type
-/* a reference to a GLOBAL function: */
-#define EXTERN(type)		extern type _Optlink
-#else
+#if defined(__VISAGECPP__)
+#define JPEG_CALLING_CONV _Optlink
+#else /* !Visual Age C++ */
+#define JPEG_CALLING_CONV
+#endif
+
+/* We can't declare a static function as extern "C" as we need to do in C++
+ * programs, so suppress static in METHODDEF when using C++.
+ */
+#if defined(__cplusplus)
+#define JPEG_METHOD_LINKAGE
+#else /* !__cplusplus */
+#define JPEG_METHOD_LINKAGE static
+#endif
+
 /* a function called through method pointers: */
-#define METHODDEF(type)		static type
+#define METHODDEF(type)		JPEG_METHOD_LINKAGE type JPEG_CALLING_CONV
 /* a function used only in its module: */
-#define LOCAL(type)		static type
+#define LOCAL(type)		static type JPEG_CALLING_CONV
 /* a function referenced thru EXTERNs: */
 #define GLOBAL(type)		type
 /* a reference to a GLOBAL function: */
-#define EXTERN(type)		extern type
-#endif
+#define EXTERN(type)		extern type JPEG_CALLING_CONV
 
 /* This macro is used to declare a "method", that is, a function pointer.
  * We want to supply prototype parameters if the compiler can cope.