Re: LLVM 2.6 Released / Can it be used with Xcode?
Re: LLVM 2.6 Released / Can it be used with Xcode?
- Subject: Re: LLVM 2.6 Released / Can it be used with Xcode?
- From: Jean-Daniel Dupas <email@hidden>
- Date: Tue, 22 Dec 2009 18:10:48 +0100
Le 22 déc. 2009 à 16:56, Sean McBride a écrit :
> On 10/29/09 11:03 AM, Jean-Daniel Dupas said:
>
>> I can't answer for the "wise" part, but it is possible.
>> I'm using an up-to-date version of clang/llvm with Xcode, and although
>> I'm pretty sure it's "not supported", it works quite well.
>> llvm 2.6 is a stable released, but as clang has not really reached
>> it's first full feature version, I prefer working with the trunk
>> version (the LLVM and clang teams do their best to maintain a clean
>> and working TOT).
>>
>> You just have to replace 2 files and 1 directory in your developer
>> folder.
>>
>> /Developer/usr/bin/clang
>> /Developer/usr/libexec/clang-cc
>>
>> /Developer/usr/lib/clang/
>
> Jean-Daniel,
>
> I've just had time to try this... are those really the only 3 files you
> replaced? I download the 2.6 binaries and their distribution has the
> usual UNIXy bin-lib-man folders. There are hundreds of files in there,
> did you just ignore the others?
>
> Thanks,
Yes, they are. For practical reason, llvm uses static library (see, they are all .a file in lib).
So as clang and clang-cc are statically linked, they are autonomous and don't need any other library.
Note that if you use the latest clang release (svn trunk), clang-cc is no longer required (it no longer exists), and you need clang binary only.
The only dylib is libLTO that is used for LTO (surprising isn't it ;-)). Link Time Optimization is disabled by default and ld uses this library only if you enable LTO in Xcode. As I never managed to compile an application using LTO without getting a lots of duplicate symbol errors, I didn't bother to try to replace it with a more recent version.
-- Jean-Daniel
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