ForwardingHeaders of WTF are included as <wtf/FooBar.h>. But, the directory name was uppercase, DerivedSources/ForwardingHeaders/WTF. This confuses Ninja dependency tracking. It should be lowercase DerivedSources/ForwardingHeaders/wtf. This is sub task of Bug 180921.
Created attachment 329908 [details] Patch
Comment on attachment 329908 [details] Patch Clearing flags on attachment: 329908 Committed r226176: <https://trac.webkit.org/changeset/226176>
All reviewed patches have been landed. Closing bug.
<rdar://problem/36154848>