[Bug ld/11793] Add suggestion to error "undefined reference to `vtable for XXX'"

[phresnel at gmail dot com]

------- Additional Comments From drow at false dot org  2010-07-07 16:04 -------
Subject: Re:  Add suggestion to error "undefined reference to
 `vtable for XXX'"

On Wed, Jul 07, 2010 at 03:50:32PM -0000, manu at gcc dot gnu dot org wrote:
> I understand your frustration, but linker and compiler do not share a lot of
> information and I think there is no way (right now) to give a good diagnostic
> for this case. The linker does not know about vtables, pure functions and C++ 
> in
> general.

If there's an undefined reference to a vtable, what more does the
linker need?


------- Additional Comments From phresnel at gmail dot com  2010-07-07 21:37 
-------
(In reply to comment #3)
> I understand your frustration, but linker and compiler do not share a lot of
> information and I think there is no way (right now) to give a good diagnostic
> for this case. The linker does not know about vtables, pure functions and C++ 
> in
> general.

I understand that there is not any C++ information available at that point of
linking, but given the error message, it's prolly possible to look-up a
suggestion somewhere, or even just extend the error message in question.


> 
> I don't think that LLVM/Clang gives a better diagnostic here, because they 
> will
> need a linker integrated tightly in the compiler, and (so far) they are using
> the GNU linker. If you can show us otherwise, that would be great because I
> really wish we could provide better diagnostics from the linker.

I did not know this, interesting.

-- 


http://sourceware.org/bugzilla/show_bug.cgi?id=11793

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