We're currently passing a version-script option to the linker and Xcode's ld doesn't support this. I'll upload a patch
Created attachment 266714 [details] patch
CCing Ossy, author of the modified code.
Comment on attachment 266714 [details] patch Makes sense, r=me.
Committed r193747: <http://trac.webkit.org/changeset/193747>
*** Bug 152640 has been marked as a duplicate of this bug. ***