[MacPorts] #31995: tcl: add new variant +corefoundation

[MacPorts]

#31995: tcl: add new variant +corefoundation
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 Reporter:  marshall.perrin@…          |       Owner:  macports-tickets@…                   
     Type:  enhancement                |      Status:  new                                  
 Priority:  Normal                     |   Milestone:                                       
Component:  ports                      |     Version:  2.0.3                                
 Keywords:                             |        Port:  tcl                                  
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 This patch adds a new variant +corefoundation to tcl, which enables
 building with CoreFoundation support. This is related to the outstanding
 ticket https://trac.macports.org/ticket/22954 , which has a patch file to
 enable CoreFoundation but not as a variant.  That solution was never
 merged into the tcl port, which means that the problem described in 22954
 reoccurs with every update to the tcl port (e.g. I just had to re-patch
 the portfile for the Nth time due to the upgrade to 8.5.11 today).

 Creating a variant for corefoundation will fix this problem once and for
 all.

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Ticket URL: <https://trac.macports.org/ticket/31995>
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