Tested x86_64-linux, pushed to trunk.
-- >8 --
libstdc++-v3/ChangeLog:
* testsuite/17_intro/names.cc: Explain why poison pragma can't
be used.
---
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 86fb8f8999b..82e201c71b0 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 (
--
2.37.3
