MNT: Experimenting with openblas

Here I'm updating the fsl-base recipe so that it conforms to the recommendations in the conda-forge knowledge base.

We need to use openblas-openmp for the eddy-openmp build (https://github.com/xianyi/OpenBLAS/wiki/Faq#multi-threaded), but I'm not quite sure how to control which openblas variant is selected. I don't think it is possible to specify that in a recipe.

However, the pthread/openmp openblas variants should be binary compatible, right? So it shouldn't matter which variant is present at build time. Right?

I suspect that I will need to specify that we want the openmp build in the FSL release manifest.

meta.yaml

@@ -3,9 +3,9 @@
 # The git repository for this conda recipe is: https://git.fmrib.ox.ac.uk/fsl/conda/fsl-base.git
 
 {% set name       = 'fsl-base' %}
-{% set version = '2109.1' %}
+{% set version    = '2109.1' %}
 {% set repository = 'https://git.fmrib.ox.ac.uk/fsl/base.git' %}
-{% set build = '1' %}
+{% set build      = '2' %}
 
 package:
   name:    {{ name }}
@@ -34,8 +34,14 @@ build:
 # that they are consistent at both build and
 # install time.
 requirements:
+  # https://conda-forge.org/docs/maintainer/knowledge_base.html#blas
+  host:
+   - openblas      0.3.18
+  build:
+   - make
   run:
-   - libopenblas    0.3.17 *openmp*
+   - libblas        * *openblas
+   - openblas       0.3.18
    - zlib           1.2.11
    - boost-cpp      1.74.0
    - tk             8.6.*
@@ -43,5 +49,3 @@ requirements:
    - python         3.9.*
    - fslpy        >=3.6.1
    - fsl-sub      >=2.5.6
-  build:
-   - make