The Solaris version of Perl was compiled to include system malloc, 64-bit integer and large file support. In addition, appropriate patches have been applied. For a full list of all configuration information, review the results from this command.
% /usr/perl5/bin/perlbug -dv --- Flags: category= severity= --- Site configuration information for perl v5.8.4: . .
You can generate a shorter list by using perl -V.