XMake provides some features for introspection on the makefile environment. The target 'XM.reqs.${target}', displays the prerequistes of any defined makefile target. In this case, we list the prerequisites of target file 'build-versus-run-time.php'
[greg@p3 src]$ xmake
XM.reqs.$(curdir)/build-versus-run-time.php
/usr/local/apache/htdocs/common/xmake/examples/phpc/phpconf2003/slides/src/build-versus-run-time.php.phpc
/usr/local/apache/htdocs/common/xmake/config/XMExtensions/phpc.mkh
/usr/local/apache/htdocs/common/xmake/config/XMExtensions/phpc.mkr
/usr/local/apache/htdocs/common/xmake/config/XMakefile.mkh
/usr/local/apache/htdocs/common/xmake/config/XMakefile
/usr/local/apache/htdocs/common/xmake/config/XMakefile.mkr
/usr/local/apache/htdocs/common/xmake/examples/phpc/phpconf2003/slides/src/XMakefile.mko
/usr/local/apache/htdocs/common/xmake/examples/phpc/phpconf2003/slides/src/XMake.conf
/usr/local/apache/htdocs/common/xmake/config/XMExtensions/phpc.inc
/usr/local/apache/htdocs/common/xmake/examples/phpc/phpconf2003/slides/src/build-versus-run-time.php.phpc
/usr/local/apache/htdocs/common/xmake/examples/phpc/phpconf2003/slides/src/build-versus-run-time.inc