A much better version of this is now in backend/port/aix.

src/tools/mkldexport/Makefile

-#-------------------------------------------------------------------------
-#
-# Makefile.inc--
-#    Makefile for tools/mkldexport
-#
-# Copyright (c) 1994, Regents of the University of California
-#
-#
-# IDENTIFICATION
-#    $Header: /cvsroot/pgsql/src/tools/mkldexport/Attic/Makefile,v 1.2 1996/11/12 11:43:12 bryanh Exp $
-#
-#-------------------------------------------------------------------------
-
-all: mkldexport
-
-mkldexport: mkldexport.sh
-	cp mkldexport.sh mkldexport
-	chmod a+x mkldexport
-
-clean:
-	rm -f mkldexport

src/tools/mkldexport/README

-mkldexport is a script for creating an AIX exports from an object file.
-	
-Usage:
-       mkldexport objectfile [location]
- where
-       objectfile is the current location of the object file.
-       location is the eventual (installed) location of the 
-       object file (if different from the current
-       working directory).
-
-Written originally by Paul Aoki for postgres v4r2.
-

src/tools/mkldexport/mkldexport.sh

-#!/bin/sh
-#
-# mkldexport
-#	create an AIX exports file from an object file
-#
-# Usage:
-#	mkldexport objectfile [location]
-# where
-#	objectfile is the current location of the object file.
-#	location is the eventual (installed) location of the 
-#		object file (if different from the current
-#		working directory).
-#
-# /usr/local/devel/postgres-v4r2/src/tools/mkldexport/RCS/mkldexport.sh,v 1.2 1994/03/13 04:59:12 aoki Exp
-#
-CMDNAME=`basename $0`
-if [ -z "$1" ]; then
-	echo "Usage: $CMDNAME object [location]"
-	exit 1
-fi
-OBJNAME=`basename $1`
-if [ "`basename $OBJNAME`" != "`basename $OBJNAME .o`" ]; then
-	OBJNAME=`basename $OBJNAME .o`.so
-fi
-if [ -z "$2" ]; then
-	echo '#!'
-else
-	echo '#!' $2/$OBJNAME
-fi
-/usr/ucb/nm -g $1 | \
-	egrep ' [TD] ' | \
-	sed -e 's/.* //' | \
-	egrep -v '\$' | \
-	sed -e 's/^[.]//' | \
-	sort | \
-	uniq