[MacPorts] #22536: fix blt 2.4z build

[MacPorts]

#22536: fix blt 2.4z build
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 Reporter:  howarth@…                 |       Owner:  macports-tickets@…                   
     Type:  update                    |      Status:  new                                  
 Priority:  Normal                    |   Milestone:                                       
Component:  ports                     |     Version:  1.8.1                                
 Keywords:  x11                       |        Port:  blt                                  
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 The attached packaging allows blt to be built under the current MacPorts
 1.8.1 packages on Snow Leopard. It uses the Fedora Core 12 patches...

 1) blt-2.4z-tcl8.5-fix.patch to eliminate duplicate declarations.
 2) blt2.4z-noexactversion.patch to eliminate a problem with later tcl/tk
 8.5.x versions.
 3)  blt-x86_64.patch to fix the 64-bit build.

 This builds fine under current MacPorts 1.8.1 and works great with pymol
 and its APBS tool panel.

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Ticket URL: <http://trac.macports.org/ticket/22536>
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