Comment # 1 on bug 1051286 from Nicolas Morey-Chaisemartin

(In reply to Adrian Schr�ter from comment #0)
> I get this dependency error when adding openmpi2-devel aus BuildRequires:
> 
> unresolvable: have choice for openmpi-runtime-config needed by openmpi2:
> openmpi-config openmpi2-config, have choice for openmpi-runtime-config
> needed by openmpi: openmpi-config openmpi2-config
> 
> 
> We could solve this by prefering on of it in each prjconf (or each packager
> can workaround it in his spec file), but Dominque and me think it is better
> solved in the openmpi2 package.
> 
> Is it really true that openmpi2 is find with the openmpi version 1 config?
> 

Yes

> Doesn't it make sense the openmpi2 requires the openmp2-config ?

Yes and no :)

To explain, openmpi 1, 2 (and soon 3) provide exactly the same config file.
The intent with this trick is to allow installing multiple versions of MPI at
once. Any *-config will suffice as they contain the same stuff.

The nicer trick would be to have OBS behave the way zypper do. Because of the
Recommends in the spec, zypper does not have this kind of issue... But 

I'm open to better solutions.