Added support for BML+mpi variant (#5563)

* Added support for BML+mpi variant

Added support for BML+mpi variant. Currently restricted to master
(develop) branch pending release of next bml tag

* Update package.py

Removing redundant statement

* Update package.py

Added explicit disabling of MPI when not requested

1 files changed, 14 insertions, 1 deletions

diff --git a/var/spack/repos/builtin/packages/bml/package.py b/var/spack/repos/builtin/packages/bml/package.py
index 0131cf145e..31d08f89ec 100644
--- a/var/spack/repos/builtin/packages/bml/package.py
+++ b/var/spack/repos/builtin/packages/bml/package.py
@@ -38,12 +38,25 @@ class Bml(CMakePackage):
     version('develop', git='https://github.com/lanl/bml', branch='master')
 
     variant('shared', default=True, description='Build shared libs')
+    variant('mpi', default=False, description='Build with MPI Support')
+
+    conflicts('+mpi', when='@:1.2.2')
 
     depends_on("blas")
     depends_on("lapack")
+    depends_on('mpi', when='+mpi')
 
     def cmake_args(self):
-        return [
+        args = [
             '-DBUILD_SHARED_LIBS={0}'.format(
                 'ON' if '+shared' in self.spec else 'OFF')
         ]
+        spec = self.spec
+        if '+mpi' in spec:
+            args.append('-DBML_MPI=True')
+            args.append('-DCMAKE_C_COMPILER=%s' % spec['mpi'].mpicc)
+            args.append('-DCMAKE_CXX_COMPILER=%s' % spec['mpi'].mpicxx)
+            args.append('-DCMAKE_Fortran_COMPILER=%s' % spec['mpi'].mpifc)
+        else:
+            args.append('-DBML_MPI=False')
+        return args