Re: what does `extern "C++" ` mean?

[Paul Pluzhnikov]

"Andy" <gnu04@yahoo.com> writes:

> Why we need such code? 

Consider what happens if you put C++ code into a header, and someone
#includes your header this way:
 
extern "C" {
#include "foo.h"
}

If you provided a declaration for e.g. 'extern int foo();' in
foo.h, that function has suddenly aquired 'extern "C"' linkage,
and your end-user will be very confused when he links against
libfoo.so and gets unresolved 'foo' reference.

By explicitly stating C++ linkage, you protect your code from such
a possibility, and save time on support calls.

Cheers,
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