openblas: derives from MakefilePackage (#2488)

* MakefilePackage: changed build_args and install_args for consistency with #2464
openblas: derives from MakefilePackage

* MakefilePackage: changed default edit behavior

lib/spack/spack/build_systems/makefile.py

@@ -25,6 +25,7 @@
 
 import inspect
 
+import llnl.util.tty as tty
 from llnl.util.filesystem import working_dir
 from spack.package import PackageBase
 
@@ -45,33 +46,26 @@ class MakefilePackage(PackageBase):
     # build-system class we are using
     build_system_class = 'MakefilePackage'
 
+    build_targets = []
+    install_targets = ['install']
+
     def build_directory(self):
         """Directory where the main Makefile is located"""
         return self.stage.source_path
 
-    def build_args(self):
-        """List of arguments that should be passed to make at build time"""
-        return []
-
-    def install_args(self):
-        """List of arguments that should be passed to make at install time"""
-        return []
-
     def edit(self, spec, prefix):
         """This phase cannot be defaulted for obvious reasons..."""
-        raise NotImplementedError('\'edit\' function not implemented')
+        tty.msg('Using default implementation: skipping edit phase.')
 
     def build(self, spec, prefix):
         """Default build phase : call make passing build_args"""
-        args = self.build_args()
         with working_dir(self.build_directory()):
-            inspect.getmodule(self).make(*args)
+            inspect.getmodule(self).make(*self.build_targets)
 
     def install(self, spec, prefix):
         """Default install phase : call make passing install_args"""
-        args = self.install_args() + ['install']
         with working_dir(self.build_directory()):
-            inspect.getmodule(self).make(*args)
+            inspect.getmodule(self).make(*self.install_targets)
 
     # Check that self.prefix is there after installation
     PackageBase.sanity_check('install')(PackageBase.sanity_check_prefix)