in reply to Re^4: How much Perl6 have we got?
in thread How much Perl6 have we got?

*** GHC 6.4.0 cannot work with GCC 4.0 on Mac OS X. Please use "sudo gcc_select 3.3" to pick an earlier version of gcc, or set the CC environment variable to "/usr/bin/gcc-3.3".

If you've already installed Xcode you just need to sudo gcc_select 3.3 to continue from this point - there is no need to install those hs-plugins. If you haven't installed Xcode, you can find it on your Tiger-cd.