Artur Bergman's C<iThreads> module is a start on this, but needs to
be more mature.
+=head2 make perl_clone optionally clone ops
+
+So that pseudoforking, mod_perl, iThreads and nvi will work properly
+(but not as efficiently) until the regex engine is fixed to be threadsafe.
+
=head2 Work out exit/die semantics for threads
=head2 Typed lexicals for compiler
full-text search, an index function, locating pages on a particular
high-level subject, and so on.
-=head2 Install .3p man pages
+=head2 Install .3p manpages
-This is a bone of contention; we can create C<.3p> man pages for each
+This is a bone of contention; we can create C<.3p> manpages for each
built-in function, but should we install them by default? Tcl does this,
and it clutters up C<apropos>.
Simon Cozens promises to do this before he gets old.
=head2 Update POSIX.pm for 1003.1-2
+
=head2 Retargetable installation
Allow C<@INC> to be changed after Perl is built.
There is a patch for this, but it may require Unicodification.
=head2 Compile to real threaded code
+
=head2 Structured types
+
=head2 Modifiable $1 et al.
($x = "elephant") =~ /e(ph)/;
Not needed now we have lexical IO handles.
=head2 format BOTTOM
+
=head2 report HANDLE
Damian Conway's text formatting modules seem to be the Way To Go.
=head2 Generalised want()/caller())
+
=head2 Named prototypes
These both seem to be delayed until Perl 6.