<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 debug=0</userinput>
cc -o prog.o -c prog.c
cc -o prog prog.o
% <userinput>scons -Q debug=0</userinput>
scons: `.' is up to date.
% <userinput>scons -Q debug=1</userinput>
cc -o prog.o -c -g prog.c
cc -o prog prog.o
% <userinput>scons -Q debug=1</userinput>
scons: `.' is up to date.
</screen>
