Hello, phpdoc@lists.php.net

Can anybody explain me the meaning of string

.manual.xml: $(DEPEND_FILES) entities/global.ent

in phpdoc/Makefile, located in the following section.
I'm unable to find where does $(DEPEND_FILES) come from
and what is it used for?

-[cut]-------------------------------------[Makefile]---
...
manual.xml: $(srcdir)/manual.xml.in .manual.xml
        CONFIG_FILES=$@ CONFIG_HEADERS= ./config.status

.manual.xml: $(DEPEND_FILES) entities/global.ent
        touch .manual.xml

zendapi:
        cp -r ./../ZendAPI/figures .
...
-[cut]-------------------------------------------------

t
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