Patch in bug #76269 broke the build for me. The new flags should take precende over the environment ones.
Created attachment 122600 [details] Patch This patch fixes the build for me
Comment on attachment 122600 [details] Patch Please mention in the ChangeLog what happens otherwise.
Committed r105053: <http://trac.webkit.org/changeset/105053>
Comment on attachment 122600 [details] Patch Clearing review flag.