Tested powerpc64le-linux, pushed to trunk.
The <cxxx> headers for the C library are not under our control, so we can't prevent them from including <unistd.h>. Change the PR 49745 test to only include the C++ library headers, not the <cxxx> ones. To ensure <bits/stdc++.h> isn't included automatically we need to use no_pch to disable PCH. libstdc++-v3/ChangeLog: PR libstdc++/100117 * testsuite/17_intro/headers/c++1998/49745.cc: Explicitly list all C++ headers instead of including <bits/stdc++.h> --- .../17_intro/headers/c++1998/49745.cc | 113 +++++++++++++++++- 1 file changed, 112 insertions(+), 1 deletion(-) 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 204975e0316..f98fa3b4fb9 100644 --- a/libstdc++-v3/testsuite/17_intro/headers/c++1998/49745.cc +++ b/libstdc++-v3/testsuite/17_intro/headers/c++1998/49745.cc @@ -1,4 +1,5 @@ // { dg-do compile { target *-*-linux* *-*-gnu* } } +// { dg-add-options no_pch } // Copyright (C) 2011-2021 Free Software Foundation, Inc. // @@ -18,7 +19,117 @@ // <http://www.gnu.org/licenses/>. // libstdc++/49745 -#include <bits/stdc++.h> +// error: 'int truncate' redeclared as different kind of symbol + +// This tests that no libstdc++ headers include <unistd.h>. +// However, as discussed in PR libstdc++/100117 we cannot guarantee that +// no libc headers include it indirectly, so only include the C++ headers. +// That means we can't use <bits/stdc++.h> because that includes <cstdio> etc. +// so we list the C++ headers explicitly here. This list is unfortunately +// doomed to get out of date as new headers are added to the library. + +#include <algorithm> +#include <bitset> +#include <complex> +#include <deque> +#include <exception> +#include <fstream> +#include <functional> +#include <iomanip> +#include <ios> +#include <iosfwd> +#include <iostream> +#include <istream> +#include <iterator> +#include <limits> +#include <list> +#include <locale> +#include <map> +#include <memory> +#include <new> +#include <numeric> +#include <ostream> +#include <queue> +#include <set> +#include <sstream> +#include <stack> +#include <stdexcept> +#include <streambuf> +#include <string> +#include <typeinfo> +#include <utility> +#include <valarray> +#include <vector> + +#if __cplusplus >= 201103L +#include <array> +#include <atomic> +#include <chrono> +#include <codecvt> +#include <condition_variable> +#include <forward_list> +#include <future> +#include <initializer_list> +#include <mutex> +#include <random> +#include <ratio> +#include <regex> +#include <scoped_allocator> +#include <system_error> +#include <thread> +#include <tuple> +#include <typeindex> +#include <type_traits> +#include <unordered_map> +#include <unordered_set> +#endif + +#if __cplusplus >= 201402L +#include <shared_mutex> +#endif + +#if __cplusplus >= 201703L +#include <any> +#include <charconv> +// #include <execution> +#include <filesystem> +#include <optional> +#include <memory_resource> +#include <string_view> +#include <variant> +#endif + +#if __cplusplus >= 202002L +#include <barrier> +#include <bit> +#include <compare> +#include <concepts> +#if __cpp_impl_coroutine +# include <coroutine> +#endif +#if __has_include (<format>) +# include <format> +#endif +#include <latch> +#include <numbers> +#include <ranges> +#include <span> +#include <stop_token> +#include <semaphore> +#include <source_location> +#include <syncstream> +#include <version> +#endif + +#if __cplusplus > 202002L +#if __has_include(<spanstream>) +# include <spanstream> +#endif +#if __has_include(<stacktrace>) +# include <stacktrace> +#endif +#endif + int truncate = 0; // { dg-xfail-if "PR libstdc++/99995" { c++20 } } -- 2.31.1