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Date:      Tue, 23 Oct 2012 11:05:55 +0200
From:      Dimitry Andric <dim@FreeBSD.org>
To:        Jan Beich <jbeich@tormail.org>
Cc:        svn-src-head@freebsd.org, svn-src-all@freebsd.org, Marcel Moolenaar <marcel@FreeBSD.org>, src-committers@freebsd.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...
Message-ID:  <50865DF3.7060302@FreeBSD.org>
In-Reply-To: <1TQJtx-000C9z-I6@internal.tormail.org>
References:  <201210220118.q9M1Ifh5098857__14926.3614825488$1350868751$gmane$org@svn.freebsd.org> <1TQC0L-000AZG-Q5@internal.tormail.org> <1TQFrW-0008DN-S8@internal.tormail.org> <1TQJtx-000C9z-I6@internal.tormail.org>

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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.

For now, I would advise not to use higher levels than -O2.  Meanwhile, I
will take this problem to the llvm/clang guys.



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