Fix NumPy's printf format specifiers in C++.

QuLogic · QuLogic · commit 1ccdfc1aa981 · 2016-11-26T00:58:56.000-05:00
Not sure why it works locally but not on Travis.
diff --git a/setupext.py b/setupext.py
@@ -898,6 +898,9 @@ def add_flags(self, ext):
         ext.define_macros.append(('NPY_NO_DEPRECATED_API',
                                   'NPY_1_7_API_VERSION'))
 
+        # Allow NumPy's printf format specifiers in C++.
+        ext.define_macros.append(('__STDC_FORMAT_MACROS', 1))
+
     def get_setup_requires(self):
         return ['numpy>=1.7.1']
 
