Cause whatcomp output to use the incoming epocroot value. i.e. if epocroot is relative then so is the what output.
e.g. if EPOCROOT=\ then the output will be of the form "\epoc32\release\armv5\...." If it's "..\myepocroot" then the output will be "..\myepocroot\epoc32\release\armv5". If it's absolute then the what output will also be absolute.
<?xml version="1.0"?>
<SystemDefinition name="MCL" schema="1.4.0">
<systemModel>
<layer name="Raptor">
<module name="Smoke Tests">
<component name="simple">
<unit unitID="simpleID" name="simpleName" bldFile="simple"/>
</component>
</module>
</layer>
</systemModel>
<build>
</build>
</SystemDefinition>