Perhaps the first four words of the OP's post gives you a clue: "When I run cpan ...".

Very interesting,

no hits http://search.cpan.org/grep?cpanid=ANDK&release=CPAN-2.10&string=looks&i=1&n=1&C=0

no hits http://search.cpan.org/grep?cpanid=ANDK&release=CPAN-2.10&string=compiler&i=1&n=1&C=0

PERL cannot find the C Compiler says message comes from ppm ... because cpan isn't configured yet, so configure cpan

In reply to Re^3: Make ActivePerl use existing compiler (cpan?) by Anonymous Monk
in thread Make ActivePerl use existing compiler by testuser448

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