[petsc-users] Libraries destination directory is non-standard

[Lisandro Dalcin]

On 8 January 2015 at 23:32, Juan Luis Cano <juanlu001 at gmail.com> wrote:
> Hello all,
>
> I am trying to build a conda package of PETSc 3.4 using its Python build
> system so anybody can install it in the Anaconda Python distribution. I need
> PETSc as a dependency for FEniCS.
>

Nice to know! I was thinking about doing it myself. You may find
interesting my mpich and openmpi packages (newer versions than the
available in Anaconda) to depend on https://binstar.org/mpi4py, I
still have to put the recipes in github repo.

> The problem is that the required shared libraries (also those corresponding
> to external packages such as UMFPACK) are installed in
> $PREFIX/lib/python2.7/site-packages/petsc/lib. The build process goes
> perfectly fine but when packaging this into a tarball these libs won't be
> found by any package as they are not in $PREFIX/lib. Here is the build
> script I am using:
>

Are you using pip to create/build the conda recipes? I really advice
against that. You should create a petsc package that is independent of
a Python runtime (of course, you still need Python to run configure),
this way you can install in the standard $PREFIX location. Why do you
say things are installed in site-packages? Who is installing there
FEniCS ?

Please note/remember that conda is not only for Python stuff, but for
any other Python-independent package that install under a $PREFIX
tree.

> https://github.com/Juanlu001/conda-recipes/blob/juanlu001/fenics/petsc/build.sh
>

* Please remember to add the md5 hash under the source section.
* python should not be a runtime dependency of the petsc package

> I tried to change the destination using `--prefix` in
> PETSC_CONFIGURE_OPTIONS and after `setup.py install`, but neither worked.
> Changing LD_LIBRARY_PATH seems dangerous to me and creating symbolic links
> three levels higher seems dirty. If the python version changes, or "lib64"
> is added somewhere, this will surely break... Does anybody have a suggestion
> on how to do this?
>

Knowing the full stack of conda packages you depend on would help to
figure out your issue.


-- 
Lisandro Dalcin
============
Research Scientist
Computer, Electrical and Mathematical Sciences & Engineering (CEMSE)
Numerical Porous Media Center (NumPor)
King Abdullah University of Science and Technology (KAUST)
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