1#!/bin/sh
2
3# Script to compile a resource file for a DLL if there is a .rc file
4# for it. The resource source file is supposed to contain a version
5# info section, that uses the string BUILDNUMBER as the least
6# significant part of the version numbers. This script replaces that
7# string with a "build number" before compiling the binary resource
8# file. The build number is kept between builds in a "stamp" file, and
9# incremented each time. (If there is no stamp file, build number 0 is
10# used.) The intention is that only the "official" maintainer of a DLL
11# keeps such a stamp file, and thus the DLLs he releases have
12# increasing version number resources, which can be used by an
13# installer program to decide whether to replace an existing DLL with
14# the same name.
15
16# This is just my (tml@iki.fi) idea, if somebody comes up with a
17# better way to generate version number resources, don't hesitate to
18# suggest.
19
20# The command line arguments are:
21# $1: the name of the .rc file to check
22# $2: the name of the resource object file to produce, if the rc file exists
23
24# Check if we have a resource file for this DLL.
25rcfile=$1
26resfile=$2
27if [ -f $rcfile ]; then
28    # Check if we have a build number stamp file.
29    basename=`basename $rcfile .rc`
30    if [ -f $basename-build.stamp ]; then
31	read number <$basename-build.stamp
32	buildnumber=$[number]
33	echo Build number $buildnumber
34	rm -rf $basename-build.stamp
35    else
36	echo Using zero as build number
37        buildnumber=0
38    fi
39
40    m4 -DBUILDNUMBER=$buildnumber <$rcfile >$$.rc &&
41	${WINDRES-windres} $$.rc $resfile &&
42	rm $$.rc
43else
44    # Return failure
45    exit 1
46fi
47