Size of Object and linked program.

[Alfonso_15]

Good Morning:
I migrating a program in g++ from HP10.20 to HP11.11. In HP10.20 the size of the files are:
server.o : 633571 bytes and
server : 619996

In HP11.11 is :
server.o : 1272352 bytes and
server :15165096 Bytes : Is too big

This program is linked with the shared libraries libclntst9.a(oracle) pthread and and libcl.a.

Why is this program biggest (more 20 times the size in HP10.20) that the other one? Can I reduce this size with some speceifications?
Thanks a lot for any idea.