Importing clang/LLVM into FreeBSD HEAD

[Garrett Cooper]

On Mon, May 31, 2010 at 9:17 AM, Roman Divacky <rdivacky at freebsd.org> wrote:
> On Mon, May 31, 2010 at 09:14:09AM -0700, Bakul Shah wrote:
>> On Mon, 31 May 2010 09:52:48 +0200 Roman Divacky <rdivacky at freebsd.org>  wrote:
>> >
>> > I would like to propose to integrate clang/LLVM into FreeBSD HEAD
>> > in the near future (days, not weeks).
>> >
>> > clang/LLVM is a C/C++/ObjC compiler (framework) which aims to possibly
>> > replace gcc. It is BSDL-like licensed. The sources are ~45MB (the
>> > svn checkout is 97MB). Clang/LLVM is written in C++.
>> >
>> > Clang can compile all of FreeBSD on i386/amd64 including world and booting
>> > kernel. Other architectures that are close to working are MIPS, PowerPC
>> > and ARM. We have a branch (clangbsd-import) that just includes clang/LLVM
>> > sources and the build infrastructure and this is what we aim to integrate
>> > at first.
>> >
>> > The import of clang/LLVM was discussed at the toolchain summit May 10th
>> > but I would like to hear your opinion. I got approval from core@ on
>> > importing it.
>> >
>> > So please share your support or resistance to the idea of importing clang.
>> >
>> > Roman Divacky
>>
>> I already use clang for some things but I think the issue
>> here is not support/resistance but something else:
>>
>> * IMHO for a change of this nature the core needs to publish
>>   a set of clear acceptance criteria for importing clang.
>>   Can this be done?
>
> I asked core@ and they support the import
>
>> * Since clang doesn't support all the archs, what is the plan
>>   for unsupported archs?
>>   a. Is FreeBSD going to have both compilers in the base?
>
> yes, this is what this import is about - importing clang,
> nothing else changes
>
>>   b. Is the project drop these FreeBSD ports? or
>
> no, of course not
>
>>   c. Do people have to import gcc from ports to build these
>>      FreeBSD ports?
>
> nothing is being changed, just one more application after
> a buildworld/installworld appears (that being clang)

How much time (with -j1, approximately) does it take to build clang?
Thanks,
-Garrett