I think this was the root of my problem, but now I'm running into more issues with an odd configuration of this machine.

The file with secondary dependencies is Oracle.so, running ldd on it gives me the output:

        
libclntsh.so.10.1 => /apps/oracle/app/oracle/product/10g/lib32//libcln
+tsh.so.10.1
libnsl.so.1 =>   /usr/lib//libnsl.so.1
libsocket.so.1 =>        /usr/lib//libsocket.so.1
libgen.so.1 =>   /usr/lib//libgen.so.1
libdl.so.1 =>    /usr/lib//libdl.so.1
libaio.so.1 =>   /usr/lib//libaio.so.1
librt.so.1 =>    /usr/lib//librt.so.1
libkstat.so.1 =>         /usr/lib//libkstat.so.1
libm.so.1 =>     /usr/lib//libm.so.1
libthread.so.1 =>        /usr/lib//libthread.so.1
libc.so.1 =>     /usr/lib//libc.so.1
libnnz10.so => /apps/oracle/app/oracle/product/10g/lib32//libnnz10.so
libsched.so.1 =>         /usr/lib//libsched.so.1
libmp.so.2 =>    /usr/lib//libmp.so.2
libmd5.so.1 =>   /usr/lib//libmd5.so.1
/usr/platform/SUNW,Sun-Fire-V490/lib/libc_psr.so.1
/usr/platform/SUNW,Sun-Fire-V490/lib/libmd5_psr.so.1
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The parent poster was correct, I didn't have my LD_LIBRARY_PATH set, so I set it with
export LD_LIBRARY_PATH=/apps/oracle/app/oracle/product/10g/lib32/:/usr/lib/:/usr/platform/SUNW,Sun-Fire-V490/lib/ and tried to run pp again, this time around I get the error

install_driver(Oracle) failed: DBD::Oracle object version 1.16 does no
+t match bootstrap parameter 1.19 at /usr/local/lib/perl5/5.8.5/sun4-s
+olaris/DynaLoader.pm line 253, <STDIN> line 1.
Compilation failed in require at (eval 13) line 3, <STDIN> line 1.

 at script/billcycle.pl line 122
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I've talked to the sysadmin, and apparently there is an older version of the Oracle driver (1.16, wouldn't you know) installed for an older version of Perl (5.8.3, the version I'm using is 5.8.5), that exists for some unknown reason. The headaches involved in figuring out where libraries and modules are thusly increasing exponentially.
It appears this development machine is a little FUBAR for development, and at any rate I am more than a little confused about all of it.