Adding openfast variant to nalu. (#5675)

var/spack/repos/builtin/packages/nalu/package.py

@@ -37,12 +37,16 @@ class Nalu(CMakePackage):
 
     maintainers = ['jrood-nrel']
 
+    variant('openfast', default=False,
+            description='Compile with OpenFAST support')
+
     version('master',
             git='https://github.com/NaluCFD/Nalu.git', branch='master')
 
     # Currently Nalu only builds static libraries; To be fixed soon
     depends_on('yaml-cpp+pic~shared@0.5.3:')
     depends_on('trilinos~shared+exodus+tpetra+muelu+belos+ifpack2+amesos2+zoltan+stk+boost~superlu-dist+superlu+hdf5+zlib+pnetcdf+shards@master,12.12.1:')
+    depends_on('openfast+cxx', when='+openfast')
 
     def cmake_args(self):
         spec = self.spec
@@ -54,4 +58,9 @@ def cmake_args(self):
             '-DENABLE_INSTALL:BOOL=ON'
         ])
 
+        if '+openfast' in spec:
+            options.extend([
+                '-DOpenFAST_DIR:PATH=%s' % spec['openfast'].prefix
+            ])
+
         return options