Correct dependency for fonts in ports?

[Li-Lun Wang (Leland Wang)]

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Hi,

I wonder what is the correct dependency for ports that install pcf
fonts after modular xorg.
They were previously checking for mkfontdir and depends on
${X_CLIENTS_PORT}.  I looked into bsd.xorg.mk, and got several rough
ideas.  Should I:

1. let it depend on mkfontdir directly,
2. set USE_XORG to use some xorg module,
3. set NEED_MKFONTFOO=yes directly,
4. set XORG_CAT=font, or
5. do something else?

I couldn't seem to find documentation on how to use USE_XORG (yet).

- -- llwang
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