[MacPorts] #32599: blt is missing includes and fails to compile with clang

[MacPorts]

#32599: blt is missing includes and fails to compile with clang
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  Reporter:  fsalgado@…           |       Owner:  markd@…           
      Type:  defect               |      Status:  reopened          
  Priority:  Normal               |   Milestone:                    
 Component:  ports                |     Version:  2.0.3             
Resolution:                       |    Keywords:  clang             
      Port:  blt                  |  
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Comment(by neumann@…):

 I stepped over the blt port, while i was testing the effects of a threaded
 tcl on depending ports. I have no blt apps around. As it looks to me the
 current blt port is not usable, the demos are not working, at least the
 blt::tile support seems missing. While browsing around, it seems that the
 way to go is to use blt 2.5 http://pdqi.com/w/pw/pdqi/Wize/Blt. I made a
 quick attempt to provide a portfile for 2.5 (see attachment), but
 currently it seems to fail to find the tcl and tk library during the
 destroot step - most likely for an macports expert a trivial task. Maybe
 the provided incomplete port helps to reduce some typing.

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Ticket URL: <https://trac.macports.org/ticket/32599#comment:10>
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