From: Jonathan Wakely <jwakely@redhat.com>
Date: Mon, 12 Apr 2021 10:12:47 +0000 (+0100)
Subject: libstdc++: Fix test that fails in C++20 mode [PR 99995]
X-Git-Tag: upstream/12.2.0~8827
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=29046e02b84a16b6315d952d7f76c502d0d021c2;p=platform%2Fupstream%2Fgcc.git

libstdc++: Fix test that fails in C++20 mode [PR 99995]

The 17_intro/headers/c++1998/49745.cc test fails for C++20 mode with PCH
enabled, because PCH makes it include <bits/stdc++.h>, which includes
<atomic>, and that includes <unistd.h> in C++20 mode. The <unistd.h>
dependency should go away when C++20 atomic waiting is stable, but will
probably remain while the feature is experimental. Change the test to
always include <bits/stdc++.h>, and XFAIL for C++20 and later.

libstdc++-v3/ChangeLog:

	PR libstdc++/99995
	* testsuite/17_intro/headers/c++1998/49745.cc: Include all
	standard headers and XFAIL for effective-target c++20.
---

diff --git a/libstdc++-v3/testsuite/17_intro/headers/c++1998/49745.cc b/libstdc++-v3/testsuite/17_intro/headers/c++1998/49745.cc
index a13a40e..204975e 100644
--- a/libstdc++-v3/testsuite/17_intro/headers/c++1998/49745.cc
+++ b/libstdc++-v3/testsuite/17_intro/headers/c++1998/49745.cc
@@ -18,5 +18,7 @@
 // <http://www.gnu.org/licenses/>.
 
 // libstdc++/49745
-#include <iostream>
+#include <bits/stdc++.h>
 int truncate = 0;
+
+// { dg-xfail-if "PR libstdc++/99995" { c++20 } }