[MacPorts] #42342: LibreCAD Portfile that run's under OSX 10.7

[MacPorts]

#42342: LibreCAD Portfile that run's under OSX 10.7
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 Reporter:  librecad@…   |      Owner:  macports-tickets@…
     Type:  enhancement  |     Status:  new
 Priority:  Normal       |  Milestone:
Component:  ports        |    Version:  2.2.1
 Keywords:  LibreCAD     |       Port:  LibreCAD
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 Hello,

 attached a patch to LibreCAD's portfile so it can compile and run under
 OSX 10.7.

 The compiler has been forced to configure.compiler macports-gcc-4.8 for <
 10.9 and some funky Makefile replace needs to be executed to remove
 -Xarch_x86_64 from the Makefiles
 Finally after building the resulting LibreCAD executable be fixed with
 install_name_tool and local 'libgcc' libraries are copied into the local
 LibreCAD.app directory, this is done because of a bug in macdeployqt that
 didn't seem to locate the libgcc libraries (I believe there dis a bug
 report against it).

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Ticket URL: <https://trac.macports.org/ticket/42342>
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