[Bug c++/2316] g++ fails to overload on language linkage

[amylaar at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=2316

--- Comment #50 from Jorn Wolfgang Rennecke <amylaar at gcc dot gnu.org> ---
(In reply to Marc Glisse from comment #49)
> large pieces of my patch as nonsense). Fixing this particular issue should
> not be too hard, there must be a place in the compiler that merges a number
> of properties from the early declaration into the definition, and we need to
> add extern "C" to that list.

It's not exactly a single place. For C, in c/c-decl.c, we got
duplicate_decls, which uses merge_decls.

For C++, in cp/decl.c, we got another function called duplicate_decls.