By default, Configure selects ithreads if -Dusethreads is specified.
+(You need to use also the PerlIO layer, explained later, if you decide
+to use ithreads, to guarantee the good interworking of threads and I/O.)
+
However, you can select the old 5005threads behavior
sh Configure -Dusethreads -Duse5005threads
=item Porting information
-Specific information for the OS/2, Plan9, VMS and Win32 ports is in the
+Specific information for the OS/2, Plan 9, VMS and Win32 ports is in the
corresponding README files and subdirectories. Additional information,
including a glossary of all those config.sh variables, is in the Porting
subdirectory. Especially Porting/Glossary should come in handy.