[Bug go/81946] runtime.inc:782:28: error: field ‘__sem_lock’ has incomplete type

[ian at airs dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81946

--- Comment #6 from Ian Lance Taylor <ian at airs dot com> ---
It will be in GCC 8 but nobody backported it to the GCC 7 branch.