ghc-9.8.1 --supported-extensions doesn't report JavaScriptFFI
... but it does report NoJavaScriptFFI
:
% ghc-9.8.1 --supported-extensions|grep JavaScriptFFI
NoJavaScriptFFI
... which is very weird.
Also from .cabal
perspective, not reporting JavaScriptFFI
in --supported-extensions
is questionable (as it is accepted). Not reporting the extensions prevents its usage in default-extensions
or other-extensions
fields.