[cfe-dev] compilation regression, "fatal error: error in backend: Cannot select..."

[Devang Patel]

On Jun 2, 2011, at 8:41 AM, Sean McBride wrote:

> On Thu, 2 Jun 2011 08:33:35 -0700, Stuart Hastings said:
> 
>> Yes, this is almost certainly my fault.
>> 
>> Sean, could you advise me how to extract a test case to reproduce this?
> 
> I'm afraid I neither know much about the vxl project nor C++.  (I build
> it nightly

It'd make investigators life easier if it is possible for you to get the bitcode file. If you build it then probably you can find the clang command line that is crashing with this fatal error then you can easily extract bitcode file. If the command line is 

$ clang <various compiler options> -c  foo.c -o foo.o

then do

$  clang <various compiler options> -c  foo.c -emit-llvm -o foo.bc

foo.bc is a bitcode file that can immensely help someone track this crash without setting up vxl project.
-
Devang

> because it is a dependency of a dependency of my application,
> and as I hope to switch to clang one day, I contribue the nightly build
> so that the vxl developers can keep their code building with clang.)
> 
> I image you should be able to repro by building vxl with clang.
> 
> <https://vxl.svn.sourceforge.net/svnroot/vxl/trunk/>
> 
> It needs CMake to build.  Perhaps you are already familiar with CMake
> from it's use in llvm/clang?  If not, basic instructions here:
> 
> <http://vxl.sourceforge.net/releases/install-latest.html>
> 
> Cheers,
> 
> -- 
> ____________________________________________________________
> Sean McBride, B. Eng                 sean at rogue-research.com
> Rogue Research                        www.rogue-research.com 
> Mac Software Developer              Montréal, Québec, Canada
> 
> 
> 
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