[cfe-dev] Cross-compiling with clang

[Daniel Dunbar]

Hi Mark,

On Mon, Oct 12, 2009 at 2:39 AM, Mark A. Miller <mark at mirell.org> wrote:
> On Sat, Oct 3, 2009 at 1:28 AM, Chris Lattner <clattner at apple.com> wrote:
>> On Oct 2, 2009, at 8:14 PM, Mark A. Miller wrote:
>>
>> As a preface, I am not a compiler developer, so please take my questions
>> with a grain of salt. But there doesn't appear to be a clang-user mailing
>> list, so I'm posting to -dev.
>> I'm extremely interested in clang, since it both attempts to be saner than
>> what gcc has become, and doesn't have the community forking licensing issues
>> of GPLv2 and GPLv3. My recent projects have involved building
>> cross-compilers for various targets, such as ARM, MIPS, PPC, sh4, et cetera.
>> My main question is, has any work been done on allowing clang to
>> cross-compile various targets? I found the following
>> bug: http://llvm.org/bugs/show_bug.cgi?id=4127 which indicated that it was
>> still a work in progress.
>> Also, I suppose this question may be better posed to the llvm list, but is
>> there any documentation on how to use a gcc frontend and llvm backend to
>> cross-compile?
>> Lastly, and this is more of a slight nitpick issue, since I managed to find
>> the bug with the following mailing list
>> post: http://article.gmane.org/gmane.comp.compilers.clang.devel/5893 I'd
>> point out that the -arch feature currently only works on MacOSX. I wasted
>> several hours trying to figure out what I was doing wrong on my Linux
>> installation until I found ths out.
>>
>> Hi Mark,
>> This is an area that we are actively interested in involving, but no one is
>> driving yet.  Are you interested in helping out?  I'm not too familiar with
>> the issues and Daniel (who is most knowledgeable about the driver) is out on
>> vacation for 2 weeks.
>> -Chris
>
> Sorry for the late reply.
>
> I'd be interested in helping in any capability I can.
>
> I was mainly curious as to the current status of cross-compiling
> aspect of clang, since I'm eager for it to supplant GPLv3ed gcc.

The current status is basically what you've observed. We would like it
to happen, but no one is currently actively working on it.

 - Daniel