[MacPorts] #43114: py-matplotlib: enable cairo backend by default?

[MacPorts]

#43114: py-matplotlib: enable cairo backend by default?
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 Reporter:  mojca@…      |      Owner:  sean@…
     Type:  enhancement  |     Status:  new
 Priority:  Normal       |  Milestone:
Component:  ports        |    Version:
 Keywords:               |       Port:  py-matplotlib
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 This is more a question for brainstorming than a request. I have a bunch
 of problems with rendering bugs in matplotlib. It is thus often helpful to
 compare the native pdf backed with cairo (and sometimes that's the only
 way, while at other times cairo crashes due to other problems).

 I would like to ask if making `+cairo` option default would make sense.
 What's the extra burden of dependencies needed for that?

 I'm aware that x11 drawn in by `py33-cairo +x11` (`x11` is default) is an
 overkill (for matplotlib) for that particular purpose, rdeps even shows
 python27 being a dependency of cairo->xrender->xorg-libX11->xorg-libxcb
 ->xorg-xcb-proto.

 On the other hand cairo is a dependency of soooo many ports that users
 probably have it installed already anyway.

 What do you think/suggest? (I do accept `wontfix` as an answer ;)

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Ticket URL: <https://trac.macports.org/ticket/43114>
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