#!/bin/sh
#
# $XConsortium: mergelib.cpp,v 1.3 91/08/22 11:08:08 rws Exp $
# 
# Copyright 1989 Massachusetts Institute of Technology
# 
# Permission to use, copy, modify, distribute, and sell this software and its
# documentation for any purpose is hereby granted without fee, provided that
# the above copyright notice appear in all copies and that both that
# copyright notice and this permission notice appear in supporting
# documentation, and that the name of M.I.T. not be used in advertising or
# publicity pertaining to distribution of the software without specific,
# written prior permission.  M.I.T. makes no representations about the
# suitability of this software for any purpose.  It is provided "as is"
# without express or implied warranty.
# 
# M.I.T. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL M.I.T.
# BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
# OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN 
# CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
# 
# Author:  Jim Fulton, MIT X Consortium
# 
# mergelib - merge one library into another; this is commonly used by X
#     to add the extension library into the base Xlib.
#

usage="usage:  $0  to-library from-library [object-filename-prefix]"
objprefix=_

case $# in
    2) ;;
    3) objprefix=$3 ;;
    *) echo "$usage" 1>&2; exit 1 ;;
esac

tolib=$1
fromlib=$2

if [ ! -f $fromlib ]; then
    echo "$0:  no such from-library $fromlib" 1>&2
    exit 1
fi

if [ ! -f $tolib ]; then
    echo "$0:  no such to-library $tolib" 1>&2
    exit 1
fi


#
# Create a temp directory, and figure out how to reference the 
# object files from it (i.e. relative vs. absolute path names).
#

tmpdir=tmp.$$
origdir=..

mkdir $tmpdir

if [ ! -d $tmpdir ]; then
    echo "$0:  unable to create temporary directory $tmpdir" 1>&2
    exit 1
fi

case "$fromlib" in
    /?*) upfrom= ;;
    *)  upfrom=../ ;;
esac

case "$tolib" in
    /?*) upto= ;;
    *)  upto=../ ;;
esac


#
# In the temp directory, extract all of the object files and prefix
# them with some symbol to avoid name clashes with the base library.
#
cd $tmpdir
ar x ${upfrom}$fromlib
for i in *.o; do
    mv $i ${objprefix}$i
done


#
# Merge in the object modules, ranlib (if appropriate) and cleanup
#
ar clq ${upto}$tolib *.o
ranlib ${upto}$tolib
cd $origdir
rm -rf $tmpdir



