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Date: Wed, 24 Oct 2012 18:44:23 +0200
From: Dimitry Andric <dim@FreeBSD.org>
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To: Jan Beich <jbeich@tormail.org>
Subject: Re: svn commit: r241823 - in head: . etc etc/atf etc/mtree lib lib/atf
 lib/atf/libatf-c lib/atf/libatf-c++ libexec libexec/atf libexec/atf/atf-check
 share share/atf share/doc share/doc/atf share/exampl...
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Cc: svn-src-head@freebsd.org, svn-src-all@freebsd.org,
 Marcel Moolenaar <marcel@FreeBSD.org>, src-committers@freebsd.org
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On 2012-10-23 11:05, Dimitry Andric wrote:
> On 2012-10-22 16:58, Jan Beich wrote:
>> Dimitry Andric <dim@FreeBSD.org> writes:
>>> On 2012-10-22 09:00, Jan Beich wrote:
> ...
>>>> undefined reference to `std::__1::basic_ios<char,
>>>> std::__1::char_traits<char> >::clear(unsigned int)'
>>>> clang++: error: linker command failed with exit code 1 (use -v to
>>>> see invocation)
>>> Strange, for me it compiles (with a bunch of warnings, which I have
>>> fixed locally), and links just fine.  However, I always use -std=c++11,
>>> which -std= flag are you using, if any?
>> Adding -std=c++11 doesn't help. Neither yours or Garrett's patches.
>> Instead, removing local -finline-functions (implied by -O3) does.
> With clang, -O3 does not imply -finline-functions, but it may have some
> influence on the threshold for inlining.
>
> This error is still very strange though, and it might be a real bug in
> the optimizer at -O3; at this level, it really seems to generate a call
> to a function that is declared inline, with the __always_inline
> attribute.

I have cherry-picked r165367 from the llvm trunk, which should fix this
issue, and committed it into our head r242007.

Can you please retry your buildworld with the -O3 flag after updating to
at least that revision?

I will also MFC the fix to stable/9 later on.