set_uk has asked for the wisdom of the Perl Monks concerning the following question:
I have to make use of ithreads but never needed it before and so it isn't compiled in - when I recompile Perl for ithreads will I also have to recompile all the modules I have added that are already compiled for the distribution?
I think yes. But am hoping that I can get away without.
Yes, but it's not so bad. The core modules will be built when perl is, so they will take no particular effort. Pure perl modules will be fine. XS modules will cause no particular confusion, since their solibs are installed under a platform dependent directory, like site_perl/5.8.0/i686-linux-thread-multi. The old versions will not interfere with the new. CPAN autobundle will be handy for reinstalling your favorite modules.