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

["marc.glisse at normalesup dot org" <gcc-bugzilla at gcc dot gnu dot org>]

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

--- Comment #45 from Marc Glisse <marc.glisse at normalesup dot org> 2012-01-04 13:06:10 UTC ---
(In reply to comment #42)
> Well, perhaps something like:
> #ifdef __cplusplus
> extern "C++" int __REDIRECT_NTH (pthread_create, (pthread_t *__restrict
> __newthread, const pthread_attr_t *__restrict __attr,
> void *(*__start_routine) (void *),
> void *__restrict __arg) __nonnull ((1, 3)), pthread_create);
> #endif
> (for glibc) could do the trick (and similarly for qsort and other C functions
> that take callbacks?)

For bsearch and qsort, the standard actually requires those (and solaris has
them, although we fixinclude them out currently). For posix functions, well,
the posix-c++-wg mailing-list hasn't seen a single email since March 2010...

> still I agree this would be terribly annoying for everybody.

Yes.

> At least this shouldn't be considered for GCC 4.7 at this point.

Oh, of course. Maybe not even 4.8. In the patch, I (partially) enabled alias
templates in system headers because there are some things in libstdc++ that may
not be possible to do without those, so it may be better to wait until
-std=c++11 becomes the default if we want to do that. Plus, that completely
breaks the ABI, so it should be synchronized with other ABI-breaking changes.

And we may even decide on an official WONTFIX.