added better handling of blas/openblas in petsc

Author: cekees

examples/proteus.linux2.yaml

@@ -42,6 +42,7 @@ packages:
   pillow:
   petsc:
     version: 3.7.5
+    openblas: true
     build_with: |
       parmetis, cmake, blas
     download: |

pkgs/petsc/petsc.py

@@ -109,7 +109,7 @@ def configure(ctx, stage_args):
         conf_lines.append('--with-ssl=0')
 
     # Special case, --with-blas-dir does not work with OpenBLAS
-    if 'OPENBLAS' in ctx.dependency_dir_vars:
+    if 'OPENBLAS' in ctx.dependency_dir_vars or ('BLAS' in ctx.dependency_dir_vars and ctx.parameters.get('openblas') == True):
         if ctx.parameters['platform'] == 'Darwin':
             libopenblas = '${OPENBLAS_DIR}/lib/libopenblas.dylib'
         else: