GPU support in BART

["Uecker, Martin" <Martin.Uecker@med.uni-goettingen.de>]

Hi all,

I want to activate GPU support in the Debian package
for the BART toolbox, but I am not sure what is the 
best way to approach this.

There may be several options:

We can provide an additional package which can be
installed alternatively, e.g. bart-gpu and which
provides a CUDA-enabled binary and conflicts with
the regular package.  But I wonder whether this would
make all bart packages non-free?  Or do we need
two separate source packages? 


Maybe there is a way to compile and link
against CUDA with requiring the presence of the
dynamic library of run-time.  We could then
dlopen the library at run-time if it is
present. But the compilation would then
still depend on a non-free package.


We could try to move GPU backend into a module
which can be loaded at run-time and which is
then packaged separately. But this would 
require some development effort.


Maybe you have some recommendations? Or you can
recommend a package to look at as an example?

Best,
Martin