<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 file1.o -c -I. file1.c
cc -o file2.o -c -I. file2.c
cc -o file3.o -c -I. file3.c
cc -o prog file1.o file2.o file3.o
%     [CHANGE THE CONTENTS OF hello.h]
% <userinput>scons -Q --debug=explain</userinput>
scons: rebuilding `file1.o' because `hello.h' changed
cc -o file1.o -c -I. file1.c
scons: rebuilding `file3.o' because `hello.h' changed
cc -o file3.o -c -I. file3.c
scons: rebuilding `prog' because:
           `file1.o' changed
           `file3.o' changed
cc -o prog file1.o file2.o file3.o
</screen>
