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On SGI IRIX, the thread library depends on which compiler is used.
The o32 ABI compiler comes with a run-time library based on the
user-level athread
library. Thus kernel-level capabilities such as nonblocking system
calls or time slicing can only be achieved reliably by specifying different
sprocs via the pragma Task_Info
and the
System.Task_Info package.
See the GNAT Reference Manual for further information.
The n32 ABI compiler comes with a run-time library based on the kernel POSIX threads and thus does not have the limitations mentioned above.