[MacPorts] #25320: qt4-mac mysql variant doesn't build mysql driver

[MacPorts]

#25320: qt4-mac mysql variant doesn't build mysql driver
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 Reporter:  mac.ports.fishspit@…                |       Owner:  michaelld@…           
     Type:  defect                              |      Status:  new                   
 Priority:  Normal                              |   Milestone:                        
Component:  ports                               |     Version:  1.9.0                 
 Keywords:                                      |        Port:  qt4-mac               
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Comment(by michaelld@…):

 I'm trying out some Portfile mods that go back to using -I<PATH> during
 configure instead of CPATH=<PATH> as an environment variable (ditto for -L
 and LIBRARY_PATH).  So far (maybe 1/10 of the way compiling), it seems to
 be working (using the +mysql variant).  I will post again once I know
 more, if it works or not.

 The qt4-mac Portfile states "CPATH is used instead of -I to avoid
 conflicts with other ports" and references tickets #15219 and #18723.  I
 know of no difference between the use of CPATH=<PATH> versus -I<PATH>,
 except possibly that CPATH comes first or last in the search depending on
 the compiler.  Can someone enlighten me as to the difference?

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Ticket URL: <http://trac.macports.org/ticket/25320#comment:5>
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