cc -o prog -bnoso -bI:/lib/syscalls.exp obj1.o obj2.o obj3.o

will do that for a program consisting of the three objects obj1.o, etc.

[Editor's note: You should never link programs statically that are
supposed to leave your local environment, e.g. intended for
distribution. Statically linked programs may fail to work after
installing a new AIX version or even after installing a PTF.]

From: Marc Pawliger (marc@sti.com)

As of AIX 3.2.5, you can install a speedup for AIXwindows called
Shared Memory Transport.  To static link an X application after the
SMT PTF has been installed, you must link with
-bI:/usr/lpp/X11/bin/smt.exp and the executable will NOT run on a
machine where SMT is not installed.  See /usr/lpp/X11/README.SMT

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