Your best bet is to just rebuild it from the sources. Assuming you have a 64 bit version of gcc make sure you do

setenv CC "gcc -m64"
[download]

Before the ./Configure; make; make install stuff

When it asks the compiler is gcc -m64 and the architecture is sun4-solaris-64.

The perl that comes with Solaris 2.8 is so out of date your life will be easier with one you have built youself anyway.

If you don't have 64bit gcc then don't try and cross compile it from a 32 bit compiler (you will waste a lot of time). Either find a mate who has the SPARCworks compiler, or better yet download the binaries (assuming you have root permission to install it).