Fix CoreText font database build on watchOS

The font database uses UIKit symbols on all UIKit platforms and thus it
must be linked to. Also, limit the missing CoreText.h workaround so
that it is not applied for versions of Xcode where the bug is fixed.

Change-Id: Ia2a94baba6b0df618604a0bc3092fbd2a48d5aea
Reviewed-by: Jake Petroules <jake.petroules@qt.io>

mkspecs/features/uikit/watchos_coretext.prf

@@ -0,0 +1,15 @@
+# CoreText is documented to be available on watchOS, but the headers aren't present
+# in the watchOS Simulator SDK like they are supposed to be. Work around the problem
+# by adding the device SDK's headers to the search path as a fallback.
+# rdar://25314492, rdar://27844864
+simulator_system_frameworks = $$xcodeSDKInfo(Path, $${simulator.sdk})/System/Library/Frameworks
+watchos:simulator:!exists($$simulator_system_frameworks/CoreText.framework/Headers/CoreText.h) {
+    device_system_frameworks = $$xcodeSDKInfo(Path, $${device.sdk})/System/Library/Frameworks
+    for (arch, QMAKE_APPLE_SIMULATOR_ARCHS) {
+        QMAKE_CXXFLAGS += \
+            -Xarch_$${arch} \
+            -F$$simulator_system_frameworks \
+            -Xarch_$${arch} \
+            -F$$device_system_frameworks
+    }
+}

src/3rdparty/harfbuzz-ng/harfbuzz-ng.pro

@@ -168,21 +168,7 @@ contains(SHAPERS, coretext) {
         # even in 10.8 where they were also made available stand-alone.
         LIBS_PRIVATE += -framework ApplicationServices
 
-    # CoreText is documented to be available on watchOS, but the headers aren't present
-    # in the watchOS Simulator SDK like they are supposed to be. Work around the problem
-    # by adding the device SDK's headers to the search path as a fallback.
-    # rdar://25314492, rdar://27844864
-    watchos:simulator {
-        simulator_system_frameworks = $$xcodeSDKInfo(Path, $${simulator.sdk})/System/Library/Frameworks
-        device_system_frameworks = $$xcodeSDKInfo(Path, $${device.sdk})/System/Library/Frameworks
-        for (arch, QMAKE_APPLE_SIMULATOR_ARCHS) {
-            QMAKE_CXXFLAGS += \
-                -Xarch_$${arch} \
-                -F$$simulator_system_frameworks \
-                -Xarch_$${arch} \
-                -F$$device_system_frameworks
-        }
-    }
+    CONFIG += watchos_coretext
 }
 
 contains(SHAPERS, fallback)|isEmpty(SHAPERS) {

src/platformsupport/fontdatabases/mac/coretext.pri

@@ -9,23 +9,9 @@ qtConfig(freetype) {
 
 uikit: \
     # On iOS/tvOS/watchOS CoreText and CoreGraphics are stand-alone frameworks
-    LIBS_PRIVATE += -framework CoreText -framework CoreGraphics
+    LIBS_PRIVATE += -framework CoreText -framework CoreGraphics -framework UIKit
 else: \
     # On macOS they are re-exported by the AppKit framework
     LIBS_PRIVATE += -framework AppKit
 
-# CoreText is documented to be available on watchOS, but the headers aren't present
-# in the watchOS Simulator SDK like they are supposed to be. Work around the problem
-# by adding the device SDK's headers to the search path as a fallback.
-# rdar://25314492, rdar://27844864
-watchos:simulator {
-    simulator_system_frameworks = $$xcodeSDKInfo(Path, $${simulator.sdk})/System/Library/Frameworks
-    device_system_frameworks = $$xcodeSDKInfo(Path, $${device.sdk})/System/Library/Frameworks
-    for (arch, QMAKE_APPLE_SIMULATOR_ARCHS) {
-        QMAKE_CXXFLAGS += \
-            -Xarch_$${arch} \
-            -F$$simulator_system_frameworks \
-            -Xarch_$${arch} \
-            -F$$device_system_frameworks
-    }
-}
+CONFIG += watchos_coretext

src/platformsupport/fontdatabases/mac/qcoretextfontdatabase_p.h

@@ -57,12 +57,7 @@
 #include <qpa/qplatformtheme.h>
 #include <private/qcore_mac_p.h>
 
-#ifdef Q_OS_OSX
-#include <ApplicationServices/ApplicationServices.h>
-#else
-#include <CoreText/CoreText.h>
-#include <CoreGraphics/CoreGraphics.h>
-#endif
+Q_FORWARD_DECLARE_CF_TYPE(CTFontDescriptor);
 
 Q_DECLARE_METATYPE(QCFType<CGFontRef>);
 Q_DECLARE_METATYPE(QCFType<CFURLRef>);