try to find openblas on macos

Author: tpaviot

template.yml

@@ -18,7 +18,8 @@ jobs:
   # on macOs, openblas is alreadey installed
   - ${{ if contains(parameters.vmImage, 'macOs') }}: 
     - bash: |
-        brew install ninja open-mpi
+        brew install ninja open-mpi && \
+        export CMAKE_PREFIX_PATH="/usr/local/opt/lapack;/usr/local/opt/openblas:$CMAKE_PREFIX_PATH"
       displayName: 'Install BLAS and MPI libraries'
 
   - bash : |