On Sun, 20 Apr 2025 at 10:03, ZENG Hao wrote: > > When building for 'i386-*' targets, all basic types are 'sometimes lock-free' > and thus std::atomic_signed_lock_free and std::atomic_unsigned_lock_free are > not declared. In the header <atomic>, they are placed in preprocessor > condition __cpp_lib_atomic_lock_free_type_aliases. In module std, they should > be the same.
Thanks for the patch. I'll push this to trunk, but I don't think it's urgent for GCC 15.1 so I will do the backport for the 15.2 release. > > libstdc++-v3/ChangeLog: > > * src/c++23/std.cc.in: Add preprocessor condition > __cpp_lib_atomic_lock_free_type_aliases for > std::atomic_signed_lock_free and std::atomic_unsigned_lock_free. > --- > libstdc++-v3/src/c++23/std.cc.in | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/libstdc++-v3/src/c++23/std.cc.in > b/libstdc++-v3/src/c++23/std.cc.in > index 5e18ad73908..ea50496b057 100644 > --- a/libstdc++-v3/src/c++23/std.cc.in > +++ b/libstdc++-v3/src/c++23/std.cc.in > @@ -599,7 +599,9 @@ export namespace std > using std::atomic_schar; > using std::atomic_short; > using std::atomic_signal_fence; > +#ifdef __cpp_lib_atomic_lock_free_type_aliases > using std::atomic_signed_lock_free; > +#endif > using std::atomic_size_t; > using std::atomic_store; > using std::atomic_store_explicit; > @@ -622,7 +624,9 @@ export namespace std > using std::atomic_uintptr_t; > using std::atomic_ullong; > using std::atomic_ulong; > +#ifdef __cpp_lib_atomic_lock_free_type_aliases > using std::atomic_unsigned_lock_free; > +#endif > using std::atomic_ushort; > using std::atomic_wait; > using std::atomic_wait_explicit; > -- > 2.49.0 >
