Index: include/cstdio
===================================================================
--- include/cstdio	(revision 139104)
+++ include/cstdio	(working copy)
@@ -101,6 +101,10 @@
 
 #pragma GCC system_header
 
+// those may be defined as a macro
+#undef getc
+#undef putc
+
 _LIBCPP_BEGIN_NAMESPACE_STD
 
 using ::FILE;
