From: Jonathan Wakely <jwakely@redhat.com>
Date: Wed, 14 Sep 2022 13:16:25 +0000 (+0100)
Subject: libstdc++: Add comment to 17_intro/names.cc test
X-Git-Tag: basepoints/gcc-14~4532
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9a1bc4b463e61cd5bc5f169a08a420aae39a07f6;p=thirdparty%2Fgcc.git

libstdc++: Add comment to 17_intro/names.cc test

libstdc++-v3/ChangeLog:

	* testsuite/17_intro/names.cc: Explain why poison pragma can't
	be used.
---

diff --git a/libstdc++-v3/testsuite/17_intro/names.cc b/libstdc++-v3/testsuite/17_intro/names.cc
index 86fb8f8999b1..82e201c71b0c 100644
--- a/libstdc++-v3/testsuite/17_intro/names.cc
+++ b/libstdc++-v3/testsuite/17_intro/names.cc
@@ -20,6 +20,8 @@
 
 // Define macros for some common variables names that we must not use for
 // naming variables, parameters etc. in the library.
+// N.B. we cannot use '#pragma GCC poison A' because that also prevents using
+// these names even as macro arguments, e.g. #define FOO(A) BAR(A)
 #define A (
 #define B (
 #define C (