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[Bug ld/12762] lto produces multiple definition errors for all symbols (
From: |
nickc at redhat dot com |
Subject: |
[Bug ld/12762] lto produces multiple definition errors for all symbols (including CRT) in C++ |
Date: |
Tue, 2 Aug 2011 10:57:08 +0000 |
http://sourceware.org/bugzilla/show_bug.cgi?id=12762
--- Comment #14 from Nick Clifton <nickc at redhat dot com> 2011-08-02 10:56:35
UTC ---
Hi Alan,
> Nick, I reckon your patch is covering a bug elsewhere.
Oh, definitely.
> Symbols in discarded sections are supposed to be treated as undefined.
But these sections are not being discarded.
The problem, I think is that gcc's LTO framework is trying to use the comdat
feature to handle duplicate symbols, but this is not really supported by COFF
based targets.
> Ah ha! I see _bfd_generic_section_already_linked is setting
> SEC_GROUP for the plugin comdat entry in the already_linked list, and then
> totally ignores any entry with SEC_GROUP set.
I saw that too, but I could not find a way to make it work.
> Created attachment 5870 [details]
> fix the real problem
Did you try this on the test case in this PR ? I had a go locally and it seems
that the problem is still there. :-( Either that or I misapplied your patch.
Cheers
Nick
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- [Bug ld/12762] lto produces multiple definition errors for all symbols (including CRT) in C++, nickc at redhat dot com, 2011/08/01
- [Bug ld/12762] lto produces multiple definition errors for all symbols (including CRT) in C++, nickc at redhat dot com, 2011/08/01
- [Bug ld/12762] lto produces multiple definition errors for all symbols (including CRT) in C++, xunxun1982 at gmail dot com, 2011/08/01
- [Bug ld/12762] lto produces multiple definition errors for all symbols (including CRT) in C++, xunxun1982 at gmail dot com, 2011/08/01
- [Bug ld/12762] lto produces multiple definition errors for all symbols (including CRT) in C++, amodra at gmail dot com, 2011/08/01
- [Bug ld/12762] lto produces multiple definition errors for all symbols (including CRT) in C++, amodra at gmail dot com, 2011/08/01
- [Bug ld/12762] lto produces multiple definition errors for all symbols (including CRT) in C++, amodra at gmail dot com, 2011/08/01
- [Bug ld/12762] lto produces multiple definition errors for all symbols (including CRT) in C++,
nickc at redhat dot com <=
- [Bug ld/12762] lto produces multiple definition errors for all symbols (including CRT) in C++, amodra at gmail dot com, 2011/08/02
- [Bug ld/12762] lto produces multiple definition errors for all symbols (including CRT) in C++, steve at sk2 dot org, 2011/08/03
- [Bug ld/12762] lto produces multiple definition errors for all symbols (including CRT) in C++, vanboxem.ruben at gmail dot com, 2011/08/03
- [Bug ld/12762] lto produces multiple definition errors for all symbols (including CRT) in C++, amodra at gmail dot com, 2011/08/04
- [Bug ld/12762] lto produces multiple definition errors for all symbols (including CRT) in C++, cvs-commit at gcc dot gnu.org, 2011/08/04
- [Bug ld/12762] lto produces multiple definition errors for all symbols (including CRT) in C++, amodra at gmail dot com, 2011/08/04
- [Bug ld/12762] lto produces multiple definition errors for all symbols (including CRT) in C++, hjl.tools at gmail dot com, 2011/08/08
- [Bug ld/12762] lto produces multiple definition errors for all symbols (including CRT) in C++, cvs-commit at gcc dot gnu.org, 2011/08/09
- [Bug ld/12762] lto produces multiple definition errors for all symbols (including CRT) in C++, cvs-commit at gcc dot gnu.org, 2011/08/16
- [Bug ld/12762] lto produces multiple definition errors for all symbols (including CRT) in C++, vanboxem.ruben at gmail dot com, 2011/08/25