=head2 Better support for nonpreemptive threading systems like PTH
-Perhaps do yield() before blocking calls, exchange calls to non blocking
-calls specific for those libraries (for example GNUpth has a pth_sleep
-which is a non pth aware version of sleep).
+To better support nonpreemptive threading systems perhaps some of the
+blocking functions internally in perl should do a yield() before a
+blocking call.
+
+In some cases, like GNUpth, which has replacement functions that
+are non blocking (pth_select instead of select), maybe per should
+be using them instead when built for threading.
=head2 Typed lexicals for compiler
C<qr//> already gives us a way of saving compiled regexps, but it should
be done automatically.
-=head2 Re-entrant functions
-
-Add configure probes for C<_r> forms of system calls and fit them to the
-core. Unfortunately, calling conventions for these functions and not
-standardised.
-
=head2 Cross-compilation support
Bart Schuller reports that using C<microperl> and a cross-compiler, he