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# Script to compile a resource file for a DLL if there is a .rc file
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# for it. The resource source file is supposed to contain a version
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# info section, that uses the string BUILDNUMBER as the least
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# significant part of the version numbers. This script replaces that
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# string with a "build number" before compiling the binary resource
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# file. The build number is kept between builds in a "stamp" file, and
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# incremented each time. (If there is no stamp file, build number 0 is
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# used.) The intention is that only the "official" maintainer of a DLL
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# keeps such a stamp file, and thus the DLLs he releases have
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# increasing version number resources, which can be used by an
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# installer program to decide whether to replace an existing DLL with
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# This is just my (tml@iki.fi) idea, if somebody comes up with a
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# better way to generate version number resources, don't hesitate to
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# The command line arguments are:
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# $1: the name of the .rc file to check
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# $2: the name of the resource object file to produce, if the rc file exists
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# Check if we have a resource file for this DLL.
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if [ -f $rcfile ]; then
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# Check if we have a build number stamp file.
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basename=`basename $rcfile .rc`
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if [ -f $basename-build.stamp ]; then
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read number <$basename-build.stamp
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buildnumber=$[number+1]
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echo Build number $buildnumber
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echo $buildnumber >$basename-build.stamp
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echo Using zero as build number
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m4 -DBUILDNUMBER=$buildnumber <$rcfile >$$.rc
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windres $$.rc $resfile