JSC special function forward declarations (e.g. JSC_DECLARE_HOST_FUNCTION) that are internal to a cpp file should be declared with static to avoid external linkage.
Created attachment 412266 [details] Patch
Created attachment 412279 [details] Patch
Created attachment 412280 [details] Patch
Created attachment 412281 [details] Patch
Created attachment 412284 [details] Patch
Committed r268990: <https://trac.webkit.org/changeset/268990> All reviewed patches have been landed. Closing bug and clearing flags on attachment 412284 [details].
<rdar://problem/70688374>