X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/68dd2c52a467cc32884e541fb504792219d3c213..d0260bd894ec5ef95c960e45cdaff3e6ebae019d:/include/wx/osx/cocoa/private.h

diff --git a/include/wx/osx/cocoa/private.h b/include/wx/osx/cocoa/private.h
index a9d77d1fc5..a0a929df8d 100644
--- a/include/wx/osx/cocoa/private.h
+++ b/include/wx/osx/cocoa/private.h
@@ -352,7 +352,22 @@ protected :
     - (void)sheetDidEnd:(NSWindow *)sheet returnCode:(int)returnCode contextInfo:(void *)contextInfo;
     @end
 
-    WXEXPORT @interface wxNSAppController : NSObject wxOSX_10_6_AND_LATER(<NSApplicationDelegate>)
+    // This interface must be exported in shared 64 bit multilib build but
+    // using WXEXPORT with Objective C interfaces doesn't work with old (4.0.1)
+    // gcc when using 10.4 SDK. It does work with newer gcc even in 32 bit
+    // builds but seems to be unnecessary there so to avoid the expense of a
+    // configure check verifying if this does work or not with the current
+    // compiler we just only use it for 64 bit builds where this is always
+    // supported.
+    //
+    // NB: Currently this is the only place where we need to export an
+    //     interface but if we need to do it elsewhere we should define a
+    //     WXEXPORT_OBJC macro once and reuse it in all places it's needed
+    //     instead of duplicating this preprocessor check.
+#ifdef __LP64__
+    WXEXPORT
+#endif // 64 bit builds
+    @interface wxNSAppController : NSObject wxOSX_10_6_AND_LATER(<NSApplicationDelegate>)
     {
     }