Error Configuring PLPERL on PQSQL

Hello,
I am having a bear of a time installing plperl on postgres 7.2.1

First I configure pgsql with plperl
$ ./configure --with-perl

Then I create the makefile from ./src/interfaces/perl5
$ perl Makefile.PL

Then
$ make
returns this error:

make -C ../../../src/interfaces/libpq all
make[1]: Entering directory
`/root/Desktop/postgresql-7.2.1/src/interfaces/libpq'
make[1]: Nothing to be done for `all'.
make[1]: Leaving directory
`/root/Desktop/postgresql-7.2.1/src/interfaces/libpq'
make -f Makefile all VPATH=
make[1]: Entering directory
`/root/Desktop/postgresql-7.2.1/src/interfaces/perl5'
make[1]: *** No rule to make target `/Pg.pm', needed by `pm_to_blib'.  Stop.
make[1]: Leaving directory
`/root/Desktop/postgresql-7.2.1/src/interfaces/perl5'
make: *** [all] Error 2

Many of the messages in the archives refer to this error, but none indicate
a solution that has worked for me.
After several days of struggling, I decided to send in a request for HELP.
I am using SUSE 8.0.

Thank in Advance,
Jeff