added features support to all of the toolchains

Author: theotherjimmy

workspace_tools/targets.py

@@ -58,7 +58,7 @@ def wrapper(*args, **kwargs):
 class Target:
     # Cumulative attributes can have values appended to them, so they
     # need to be computed differently than regular attributes
-    __cumulative_attributes = ['extra_labels', 'macros']
+    __cumulative_attributes = ['extra_labels', 'macros', 'features']
 
     # Utility function: traverse a dictionary and change all the strings in the dictionary to
     # ASCII from Unicode. Needed because the original mbed target definitions were written in

workspace_tools/toolchains/__init__.py

@@ -298,6 +298,11 @@ def get_symbols(self):
 
             # Add target's symbols
             self.symbols += self.target.macros
+            # Add target's hardware
+            try :
+                self.symbols += ["DEVICE_" + feature + "=1" for feature in self.target.features]
+            except AttributeError :
+                pass
             # Add extra symbols passed via 'macros' parameter
             self.symbols += self.macros