diff options
Diffstat (limited to 'libstdc++-v3/include/bits/cow_string.h')
| -rw-r--r-- | libstdc++-v3/include/bits/cow_string.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/libstdc++-v3/include/bits/cow_string.h b/libstdc++-v3/include/bits/cow_string.h index a49a5b04f2f..7bceb06a79b 100644 --- a/libstdc++-v3/include/bits/cow_string.h +++ b/libstdc++-v3/include/bits/cow_string.h @@ -34,6 +34,8 @@ #if ! _GLIBCXX_USE_CXX11_ABI +#include <ext/atomicity.h> // _Atomic_word, __is_single_threaded + #ifdef __cpp_lib_is_constant_evaluated // Support P1032R1 in C++20 (but not P0980R1 for COW strings). # define __cpp_lib_constexpr_string 201811L |