On Tue, Aug 08, 2023 at 11:33:52AM -0400, Viktor Dukhovni wrote:

> The build was failing, because rts/OSThreads.h via Rts.h from
> libraries/bytestring/cbits/is-valid-utf8.c had no definition of
> `clockid_t`.  This type is not exposed when _POSIX_C_SOURCE is
> not defined to a sufficiently high value:

Apologies, original $subject should have said 9.4.6.