fixes compiler errors on macos

Author: kdschlosser

builder/macOS.py

@@ -212,14 +212,18 @@ def compile():  # NOQA
         with open(mpconfigvariant_common_path, 'w') as f:
             f.write(mpconfigvariant_common)
 
-    makefile_path = 'lib/micropython/ports/unix/Makefile'
-    with open(makefile_path, 'rb') as f:
-        data = f.read().decode('utf-8')
+    for makefile_path in (
+        'lib/micropython/ports/unix/Makefile',
+        'lib/micropython/py/dynruntime.mk'
+    ):
+
+        with open(makefile_path, 'rb') as f:
+            data = f.read().decode('utf-8')
 
-    data = data.replace('-Werror', '')
+        data = data.replace('-Werror', '')
 
-    with open(makefile_path, 'wb') as f:
-        f.write(data.encode('utf-8'))
+        with open(makefile_path, 'wb') as f:
+            f.write(data.encode('utf-8'))
 
     build_sdl()