How install gcc on HPUX 10.20?

[hfpc <hfpc at mail dot ykptt dot ln dot cn>]

Hi.
There is a  HP9000 with HPUX 10.20 without standard HPUX-compiler,I have
download gcc-1.95.2.
It have installed. the directory is below:
# ls -l /opt/gcc
total 4
drwxr-xr-x   2 root       sys           1024 Jul  1 10:59 bin
drwxr-xr-x   2 root       sys             96 Jun 30 11:40 doc
drwxr-xr-x   3 root       sys             96 Jun 30 11:39
hppa1.1-hp-hpux10.20
drwxr-xr-x   3 root       sys             96 Jun 30 11:39 include
drwxr-xr-x   2 root       sys           1024 Jun 30 11:40 info
drwxr-xr-x   3 root       sys             96 Jun 30 11:40 lib
drwxr-xr-x   3 root       sys             96 Jun 30 11:40 man
#

Now,I can use gcc to compile a simple C program to build a.out file.That
is Okey. But I download anyone
perl module (DBI), That need to make,That use Makefile that was build
with "perl Makefile.PL", The
error is below:
# make
Makefile out-of-date with respect to Makefile.PL
/opt/perl5/lib/5.6.0/PA-RISC1.1/Config.pm
/opt/perl5/lib/5.6.0/PA-RISC1.1/CORE/config.h
Cleaning current config before rebuilding Makefile...
        make -f Makefile.old clean > /dev/null 2>&1 || /bin/sh -c true
        /usr/bin/perl "-I/opt/perl5/lib/5.6.0/PA-RISC1.1"
"-I/opt/perl5/lib/5.6.0" Makefile.PL
Checking if your kit is complete...
Looks good
Writing Makefile for Storable
==> Your Makefile has been rebuilt. <==
==> Please rerun the make command.  <==
        false
*** Error exit code 1

Stop.
#

==========================================
I don't know the compiler is  cc(HPUX) or gcc,How to do cause compiler
is gcc isn't cc.

thanks for any help.

sincerely.