<screen xmlns="http://www.scons.org/dbxsd/v1.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.scons.org/dbxsd/v1.0 http://www.scons.org/dbxsd/v1.0/scons.xsd">% <userinput>scons -Q</userinput>
cc -o foo1.o -c -DFOO foo.c
cc -o foo2.o -c -DBAR foo.c
cc -o foo3.o -c -DBAR -DFOO foo.c
</screen>
