Itimer.c doesn't compile on iOS non-threaded RTS

The RTS uses the pthread-based Itimer implementation due to the bizarrely crippled timer mechanisms provided imposed by that platform. This broke in 999c464d which fixed the pthreads implementation to correctly pause when unneeded. In doing this, however, it introduced a dependency on the RTS's synchronization primitives provided by OSThreads.c (e.g. Condition, Mutex).

Trac metadata

Trac field	Value
Version	8.0.1
Type	Bug
TypeOfFailure	OtherFailure
Priority	high
Resolution	Unresolved
Component	Runtime System
Test case
Differential revisions
BlockedBy
Related
Blocking
CC	simonmar
Operating system
Architecture