Symbol not found: _kMDItemDownloadedDate on Snow Leopard

I have a custom build of Qt 4.8.0 on MacOS Lion. The application I am building works fine on Lion computers.

The only problem is that it does not run on Snow Leopard:

Dyld Error Message:
Symbol not found: _kMDItemDownloadedDate
Referenced from: /Applications/PhysicsEditor.app/Contents/MacOS/../Frameworks/QtWebKit.framework/Versions/4/QtWebKit
Expected in: /System/Library/Frameworks/CoreServices.framework/Versions/A/CoreServices

It is a bit strange especially since the list of binary images tells me that QtWebKit is 4.9.0 ???

0x8d06000 - 0xa36efeb +QtWebKit 4.9.0 (compatibility 4.9.0) <3BE60F6E-1356-38C9-A162-9215511D8E95> /Applications/PhysicsEditor.app/Contents/Frameworks/QtWebKit.framework/Versions/4/QtWebKit

Does anybody have an idea where this might come from?

Hi,

Have a look at Qt-4.8.0/src/3rdparty/webkit/Source/WebKit/qt/QtWebKit.pro where libWebKitSystemInterfaceLion.a is forced even if you specify MACOSX_DEPLOYMENT_TARGET to an older OS version. This causes the missing symbol on older systems.

I edited the .pro by hand to use libWebKitSystemInterfaceLeopard.a but a bug should probably be logged.