[petsc-dev] BuildSystem clean-up

[Sean Farley]

>
> BTW: externalpackages/package/PETSC_ARCH is more like a default prefix
> for the package. Ideally if the package supported prefix - we would
> use it and put the stuff directly in PETSC_DIR/PETSC_ARCH - and
> externalpackages/package/PETSC_ARCH won't have any stuff in it.
>

Ah, ok, that makes sense now.


> Perhaps some package.py files are doing things manually and using
> externalpackages/package/PETSC_ARCH as temporary location - and later
> coping things over to PETSC_DIR/PETSC_ARCH - and not cleaning things
> up. [in externalpackages/package/PETSC_ARCH].


Right, but what should we do about it? It could potentially cause a bunch
of headaches.
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