The <future> header only needs std::atomic_flag, so can include <bits/atomic_base.h> instead of the whole of <atomic>.
libstdc++-v3/ChangeLog: * include/std/future: Include <bits/atomic_base.h> instead of <atomic>. Tested powerpc64le-linux. Committed to trunk.
commit 3ea62a2b2ed739209936e0ed27539965ae4c9840 Author: Jonathan Wakely <jwak...@redhat.com> Date: Fri Jul 23 12:32:05 2021 libstdc++: Reduce headers included by <future> The <future> header only needs std::atomic_flag, so can include <bits/atomic_base.h> instead of the whole of <atomic>. libstdc++-v3/ChangeLog: * include/std/future: Include <bits/atomic_base.h> instead of <atomic>. diff --git a/libstdc++-v3/include/std/future b/libstdc++-v3/include/std/future index 09e54c3703b..ace0c311f1a 100644 --- a/libstdc++-v3/include/std/future +++ b/libstdc++-v3/include/std/future @@ -38,9 +38,10 @@ #include <mutex> // call_once #include <condition_variable> // __at_thread_exit_elt #include <system_error> -#include <atomic> +#include <bits/atomic_base.h> // atomic_flag #include <bits/allocated_ptr.h> #include <bits/atomic_futex.h> +#include <bits/exception_defines.h> #include <bits/invoke.h> #include <bits/unique_ptr.h> #include <bits/shared_ptr.h>