I did the standard build steps for Net::Pcap and then issued this command :

gcc  -L/usr/lib -L/usr/ccs/lib -L/opt/SUNWspro/prod/lib -L/lib -L/app/
+orc/mdscripts/Binaries/lib -G Pcap.o  -o blib/arch/auto/Net/Pcap/Pcap
+.so /app/orc/mdscripts/Binaries/lib/libpcap.a
[download]

then I copied the resultant shared library into place and it works a dream. Thankyou very much indeed, you guys are the BEST !!