From 98827c53ed38886795b1f479c1d997fd89011c38 Mon Sep 17 00:00:00 2001 From: Jonathan Wakely Date: Wed, 17 May 2023 13:47:54 +0100 Subject: [PATCH] libstdc++: Add system_header pragma to Without this change many tests that depend on an effective-target will fail when compiled with -pedantic -std=c++98. This happens because the preprocessor check done by v3_check_preprocessor_condition uses -Werror and includes directly (rather than via another header like ). If is not a system header then this pedwarn is not suppressed, and the effective-target check fails: bits/c++config.h:220: error: anonymous variadic macros were introduced in C++11 [-Werror=variadic-macros] cc1plus: all warnings being treated as errors compiler exited with status 1 UNSUPPORTED: 18_support/headers/limits/synopsis.cc We could consider also changing proc v3_check_preprocessor_condition so that it includes a real header, rather than just , but that's not necessary for now. libstdc++-v3/ChangeLog: * include/bits/c++config: Add system_header pragma. --- libstdc++-v3/include/bits/c++config | 2 ++ 1 file changed, 2 insertions(+) diff --git a/libstdc++-v3/include/bits/c++config b/libstdc++-v3/include/bits/c++config index 13892787e095..009a017b048f 100644 --- a/libstdc++-v3/include/bits/c++config +++ b/libstdc++-v3/include/bits/c++config @@ -30,6 +30,8 @@ #ifndef _GLIBCXX_CXX_CONFIG_H #define _GLIBCXX_CXX_CONFIG_H 1 +#pragma GCC system_header + // The major release number for the GCC release the C++ library belongs to. #define _GLIBCXX_RELEASE -- 2.47.2