Why Clang

[Joe Gain]

On Wed, Jun 6, 2012 at 9:11 PM, 文鳥 <bunchou at googlemail.com> wrote:
> On Wed, 06 Jun 2012 19:05:59 +0100
> Matthew Seaman <matthew at FreeBSD.org> wrote:
>
>> On 06/06/2012 18:28, Thomas D. Dean wrote:
>> > Has the discussion on why change to clang been made available?
>>

You might be interested in this video:
http://www.llvm.org/devmtg/2011-11/videos/Davis_LLVMinFreeBSD-mobile.mp4

>> Yes, endlessly.  Mostly on lists like freebsd-hackers at ... and at
>> various conferences and developer summits.  Check the list archives.
>>
>> > I would like to know the reasoning.
>>
>> It's simple.  gcc-4.2, which is what the base system compiler is
>> derived from is:
>>
>>     * fairly old
>>
>>     * doesn't perform as well as more recent compilers
>>
>>     * doesn't adhere to recently established standards
>
> There's another good reason for clang which nobody mentioned so far:
> clear diagnostics. If you ever had to wade through gcc's debug output
> and compare several thousand character long template instantiations,
> just to find where they differ and then see the clear problem
> descriptions that clang produces instead, you'll understand what I
> mean.
> And in combination with libc++, which just arrived on stable, I am
> finally able to use all the features of C++11 that I want. Try to use
> e.g. std::regex even on g++47, and just see what happens.
> Of course, getting rid of GPL is an added benefit ;)
> After reading all those complaints, I just had to respond and thank
> everyone involved very much for importing clang and libc++. Great job
> well done!
>
> Best regards,
>  文鳥
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-- 
joe gain

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