Re: BLAS in pkgsrc: present and future

["Dr. Thomas Orgis" <thomas.orgis%uni-hamburg.de@localhost>]

Am Thu, 30 May 2019 07:59:42 -0500
schrieb Jason Bacon <outpaddling%yahoo.com@localhost>:

> We may have discussed this before and I missed/forgot it, but what is 
> the reasoning behind creating a situation where a build fails? It's hard 
> for me to imagine a user wanting a build to fail simply because the 
> package is marked incompatible with their chosen BLAS implementation.


My reasoning is this: If I want to be sure that things really use my chosen
optimized BLAS, I want a package to fail to alert me to the fact that
my choice does not work. I may have a GPU cluster and want all programs
optimized to use a BLAS that runs on the GPU. I may be wrong in
thinking that BLAS performance matters to all packages, but having this
switch enables me to be pointed at those packages that don't accept my
choice and prompt me to either fix the package or decide to switch to a
different BLAS for that package (heck … is VAR.package an universal
feature to override a global choice in mk.conf?).


Alrighty then,

Thomas

-- 
Dr. Thomas Orgis
HPC @ Universität Hamburg