Clarify matplotlib/PyCXX incompatibility

mdboom · mdboom · commit 7a1c8a548bc7 · 2014-09-16T11:46:12.000-04:00
diff --git a/setupext.py b/setupext.py
@@ -830,10 +830,13 @@ class CXX(SetupPackage):
     def check(self):
         if PY3:
             # There is no version of PyCXX in the wild that will work
-            # with Python 3.x
+            # with Python 3.x and matplotlib, since they lack support
+            # for the buffer object.
             self.__class__.found_external = False
-            return ("Official versions of PyCXX are not compatible with "
-                    "Python 3.x.  Using local copy")
+            return ("Official versions of PyCXX are not compatible
+                    with " "matplotlib on Python 3.x, since they lack
+                    support for " "the buffer object.  Using local
+                    copy")
 
         self.__class__.found_external = True
         old_stdout = sys.stdout
