swift

4fda7f4a - [interop][SwiftToCxx] do not expose APIs with imported declarations whose modules do not have a generated header as specified by the user

[interop][SwiftToCxx] do not expose APIs with imported declarations whose modules do not have a generated header as specified by the user The frontend option '-clang-header-expose-module' allows the user to specify that APIs from an imported module have been exposed in another generated header, and thus APIs that depend on them can be safely exposed in the current generated header.