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Date: Thu, 02 May 2013 14:36:44 -0400
From: Nikolai Lifanov <lifanov@mail.lifanov.com>
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To: rysto32@gmail.com
Subject: Re: buildworld of HEAD failing under 8.1-RELEASE
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On 05/02/2013 02:28 PM, Ryan Stone wrote:
> I am getting the following error when trying to build HEAD on an
> 8.1-RELEASE build machine (i386 jail on an amd64 host):
> 
> ===> lib/clang/libllvmanalysis (all)
> /usr/d2/users/rstone/git/svos/lib/clang/libllvmanalysis/../../../contrib/llvm/lib/Analysis/ConstantFolding.cpp:
> In function 'llvm::Constant* llvm::ConstantFoldCall(llvm::Function*,
> llvm::ArrayRef<llvm::Constant*>, const llvm::TargetLibraryInfo*)':
> /usr/d2/users/rstone/git/svos/lib/clang/libllvmanalysis/../../../contrib/llvm/lib/Analysis/ConstantFolding.cpp:1310:
> error: 'log2' was not declared in this scope
> *** [ConstantFolding.o] Error code 1
> 1 error
> *** [all] Error code 2
> 1 error
> *** [cross-tools] Error code 2
> 1 error
> *** [_cross-tools] Error code 2
> 1 error
> *** Error code 2
> 1 error
> 
> Is there anything that I can do other than build on another machine?  I
> don't control the build machines at $WORK so I'm not sure whether I can get
> them upgraded. :(
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> 

I think, per http://svnweb.freebsd.org/base/head/UPDATING?view=co
You need to bootstrap clang by building a recent version WITHOUT_CLANG
and then removing the version.

- Nikolai Lifanov