ExtUtils-CBuilder 0.21

on Perl CPAN

Clean up perl_src path using Cwd::realpath(). Only affects usage
as part of the perl core.

Protect $., $@, $!, $^E, and $? from any clobbering that might
occur in our DESTROY method. [Zefram]

From bleadperl, a patch to clean up debug symbol files (.pdb for
VC++, .tds for BCC) when running have_compiler(). [Steve Hay &
Steve Peters]