It is broken again due to various CMake-related issues.
You can comile out only JSC part of Windows port. > perl .\Tools\Scripts\build-jsc --debug JSCOnly port was introduced to skip compile all WebKit dependencies. https://constellation.slowstart.org/blog/2016/05/02/how-to-build-javascriptcore-on-your-machine/ However, GTK and WPE aren't using jhbuild now. They just download prebuilt requirements. I think we can remove JSCOnly port.
<rdar://problem/112425288>
Pull request: https://github.com/WebKit/WebKit/pull/22908