qt512.qtbase: Fix darwin build

pkgs/development/libraries/qt-5/5.12/default.nix

@@ -54,6 +54,7 @@ let
       optionals stdenv.isDarwin [
         ./qtbase.patch.d/0001-qtbase-mkspecs-mac.patch
         ./qtbase.patch.d/0002-qtbase-mac.patch
+        ./qtbase.patch.d/0013-define-kiosurfacesuccess.patch
       ]
       ++ [
         ./qtbase.patch.d/0003-qtbase-mkspecs.patch

pkgs/development/libraries/qt-5/5.12/qtbase.patch.d/0013-define-kiosurfacesuccess.patch

@@ -0,0 +1,16 @@
+diff --git a/src/plugins/platforms/cocoa/qiosurfacegraphicsbuffer.mm b/src/plugins/platforms/cocoa/qiosurfacegraphicsbuffer.mm
+index a367487e..c3aeca1d 100644
+--- a/src/plugins/platforms/cocoa/qiosurfacegraphicsbuffer.mm
++++ b/src/plugins/platforms/cocoa/qiosurfacegraphicsbuffer.mm
+@@ -49,6 +49,11 @@
+ // but was only added in the 10.14 SDK, so declare it just in case.
+ extern "C" CFPropertyListRef CGColorSpaceCopyPropertyList(CGColorSpaceRef space);
+ 
++// Introduced in 10.13: http://codeworkshop.net/objc-diff/sdkdiffs/macos/10.13/IOSurface.html
++#if !defined(kIOSurfaceSuccess)
++#define kIOSurfaceSuccess KERN_SUCCESS
++#endif
++
+ QT_BEGIN_NAMESPACE
+ 
+ Q_LOGGING_CATEGORY(lcQpaIOSurface, "qt.qpa.backingstore.iosurface");

pkgs/development/libraries/qt-5/modules/qtbase.nix

@@ -58,7 +58,7 @@ stdenv.mkDerivation {
           # TODO: move to buildInputs, this should not be propagated.
           AGL AppKit ApplicationServices Carbon Cocoa CoreAudio CoreBluetooth
           CoreLocation CoreServices DiskArbitration Foundation OpenGL
-          darwin.libobjc libiconv MetalKit
+          darwin.libobjc libiconv MetalKit IOKit
         ]
       else
         [