On Wed, 29 Jul 2009, Jeff Squyres wrote:
On Jul 28, 2009, at 1:56 PM, Ralf Wildenhues wrote:
- support files are not versioned (e.g., show_help text files)
- include files are not versioned (e.g., mpi.h)
- OMPI's DSOs actually are versioned, but more work would be needed
in this area to make that versioning scheme work in real world
scenarios
- ...and probably some other things that I'm not thinking of...
You can probably solve most of these issues by just versioning the
directory names where you put the files; and with some luck, some
downstream distribution can achieve this by merely passing a bunch of
--foodir=... options to configure.
This is probably true -- we do obey all the Autoconf-specified directories,
so overriding --foodir= should work. It may break things like mpirun
--prefix behavior, though. But I think that the executables would be
problematic -- you'd only have 1 mpirun, orted, etc. OMPI does *not*
currently handle the Autoconf --program-* configure options properly. I
confess to not recalling the specific issues, but I recall we had long
discussions about them -- the issues are quite tangled and complicated. And
I remember coming to the conclusion "not worth supporting those."
FWIW, Chris is probably right that it's far easier to simply install
different OMPI versions into different $prefix trees (IMHO).
Agreeed. I was looking at the versioning of shared libraries not as a way
to allow multiple installs in the same prefix, but to allow users to know
when it was time to recompile their application.
Brian
