I got around this by altering the PATH statement to put the path to cc before /usr/ucb
or you could rename /usr/ucb/cc(which is a a shell script). Both of these are recommended workarounds
included in the Solaris FAQ

Alternatively, download a precompiled gcc from www.sunfreeware.com and use that,or a compiled perl package for solaris:
Sieperl 5.005_03 or the more recent Sieperl 5.6.1

Other binary packages are also available from the CPAN ports page.