[MacPorts] #47716: revert freetype to old filestructure, for compatibility with ftgl

[MacPorts]

#47716: revert freetype to old filestructure, for compatibility with ftgl
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 Reporter:  rene.vanpaassen@…          |      Owner:  macports-tickets@…
     Type:  defect                     |     Status:  new
 Priority:  Normal                     |  Milestone:
Component:  ports                      |    Version:  2.3.3
 Keywords:  freetype development ftgl  |       Port:  freetype
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 Freetype used to install most header files in

 <includedir>/freetype2/freetype

 for 2.5.5, this changed to:
 <includedir>/freetype2

 This creates a conflict when attempting to use ftgl, which depends on
 freetype; on a case-insensitive mac (as most are), the ftgl FTGlyph.h is
 confused with freetype's ftglyph.h. For compilation with freetype, the
 <includedir>/freetype2 dir needs to be in the include path, which makes
 that all header files there are visible to the compiler.

 Attached portfile path reverts to the old install path, and adjusts the
 <includedir>/freetype2/config/ftheader.h file accordingly.

 I also made a bug report for freetyps, no idea whether and when this is
 taken up.

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Ticket URL: <https://trac.macports.org/ticket/47716>
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