Currently, run-bindings-tests outputs the following error (although it outputs "all tests passed!" in the end): Testing the ObjC generator on TestObj.idl gcc: WebCore/bindings/objc/PublicDOMInterfaces.h: No such file or directory gcc: warning: '-x objective-c' after last input file has no effect gcc: no input files This is because CodeGeneratorObjC.pm assumes that the current working directory is WebKit/Source/, but run-bindings-tests sets the current working directory to WebKit/. We should change it to WebKit/Source/. Incidentally, fixing run-bindings-tests are more reasonable than fixing CodeGeneratorObjC.pm, since real build scripts (e.g. WebCore.gyp) run with the assumption that the current working directory is WebKit/Source/.