[patch] Error if an extern "C" declaration matches a previous hidden extern "C" declaration

[Richard Smith]

LGTM. It looks like the previous code was trying to work around us
classifying internal-linkage entities as having C language linkage :)

On Mon, Mar 11, 2013 at 7:13 PM, Rafael Espíndola <
rafael.espindola at gmail.com> wrote:

> Without this patch we produce an error for
>
>
> extern "C" {
>   void f() {
>     extern int b;
>   }
> }
>
> extern "C" {
>   extern float b;
> }
>
>
> but not for
>
> extern "C" {
>   void f() {
>     extern int b;
>   }
> }
>
> extern "C" {
>   float b;
> }
>
>
> Cheers,
> Rafael
>
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