From 6f0d67b912900009bff5018bd58e17ea1db1de69 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Arsen=20Arsenovi=C4=87?= <arsen@aarsen.me>
Date: Wed, 8 Mar 2023 17:01:24 +0100
Subject: libstdc++: Add a test for <version> FTM redefinitions

This test detects redefinitions by compiling stdc++.h and <version>, by
disabling the system_header pragma on the latter, to allow warnings in
it.  Thanks Patrick Palka for the suggestion.

libstdc++-v3/ChangeLog:

	* testsuite/17_intro/versionconflict.cc: New test.
	* include/std/version: Allow disabling the system_header pragma
	via _GLIBCXX_TESTING_SYSHDR.
---
 libstdc++-v3/testsuite/17_intro/versionconflict.cc | 7 +++++++
 1 file changed, 7 insertions(+)
 create mode 100644 libstdc++-v3/testsuite/17_intro/versionconflict.cc

(limited to 'libstdc++-v3/testsuite')

diff --git a/libstdc++-v3/testsuite/17_intro/versionconflict.cc b/libstdc++-v3/testsuite/17_intro/versionconflict.cc
new file mode 100644
index 00000000000..6c212980ab0
--- /dev/null
+++ b/libstdc++-v3/testsuite/17_intro/versionconflict.cc
@@ -0,0 +1,7 @@
+// { dg-do preprocess }
+// { dg-additional-options "-Werror" }
+
+// Test for redefinitions of FTMs using bits/stdc++.h.
+#define _GLIBCXX_TESTING_SYSHDR
+#include <bits/stdc++.h>
+#include <version>
-- 
cgit v1.2.1