[gcc r12-7469] libstdc++: Fix test failure on AIX

[Jonathan Wakely]

https://gcc.gnu.org/g:64cdf49962996747b4c5687a705551d5fc61fac8

commit r12-7469-g64cdf49962996747b4c5687a705551d5fc61fac8
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Thu Mar 3 22:20:32 2022 +0000

    libstdc++: Fix test failure on AIX
    
    This fixes a test failure due to a non-reserved name in an AIX system
    header (included via <pthread.h>). That name clashes with one of the
    names we check our own headers for, so skip checking that name on AIX.
    
    libstdc++-v3/ChangeLog:
    
            * testsuite/17_intro/names.cc (func): Undef on AIX.

Diff:
---
 libstdc++-v3/testsuite/17_intro/names.cc | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libstdc++-v3/testsuite/17_intro/names.cc b/libstdc++-v3/testsuite/17_intro/names.cc
index 1f7f83da8fa..ede2fe8caa7 100644
--- a/libstdc++-v3/testsuite/17_intro/names.cc
+++ b/libstdc++-v3/testsuite/17_intro/names.cc
@@ -203,6 +203,8 @@
 #undef y
 // <sys/var.h> defines vario::v
 #undef v
+// <sys/timer.h> defines trb::func and cputime_tmr::func
+#undef func
 #endif
 
 #ifdef __APPLE__