Standard Library documentation build fails when optional libraries are disabled #10584
Description
When built without threads it fails:
File "../otherlibs/systhreads/condition.mli", line 41, characters 16-23:
41 | m] atomically unlocks the mutex [m] and suspends the
^^^^^^^
Error: Unbound module Mutex
configure arguments: -verbose -prefix "/usr/local" --disable-force-safe-string CC="cc" ASPP="cc -c" PARTIALLD="ld -r" AS="as " --disable-systhreads
Version: 4.12.0
OS: FreeBSD 13