[PATCH] D21607: [ELF] - Proccess 'extern' keyword in version scripts.

[George Rimar via llvm-commits]

>I am not sure it is a good idea to ignore these. 'extern "C++"' forces
>the linker to match against mangled names. What is using it in freebsd
>and what is it trying to match?
>
>Cheers,
>Rafael

Here is that script file:
https://github.com/freebsd/freebsd/blob/master/gnu/lib/libsupc%2B%2B/Version.map

George.