commit 5e390a2874a9629c13eaddb76f82a66f0634a864
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Fri Mar 10 13:14:33 2017 +0000

    Fix libstdc++ reserved names test to pass on AIX
    
    	* testsuite/17_intro/names.cc: Undefine macros that clash with
    	identifiers in AIX system headers.

diff --git a/libstdc++-v3/testsuite/17_intro/names.cc b/libstdc++-v3/testsuite/17_intro/names.cc
index a7d9a6b..c525861 100644
--- a/libstdc++-v3/testsuite/17_intro/names.cc
+++ b/libstdc++-v3/testsuite/17_intro/names.cc
@@ -98,4 +98,13 @@
 #define x (
 #define y (
 #define z (
+
+#ifdef _AIX
+// See https://gcc.gnu.org/ml/libstdc++/2017-03/msg00015.html
+#undef f
+#undef r
+#undef x
+#undef y
+#endif
+
 #include <bits/stdc++.h>