[MacPorts] #66439: irrlichtmt fails to install on Mac OS 10.6

[MacPorts]

#66439: irrlichtmt fails to install on Mac OS 10.6
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  Reporter:  programmingkidx  |      Owner:  l2dy
      Type:  defect           |     Status:  assigned
  Priority:  Normal           |  Milestone:
 Component:  ports            |    Version:
Resolution:                   |   Keywords:
      Port:  irrlichtmt       |
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Comment (by Zweihorn):

 Voila. Faster than expected.

 Reply from a very kind and quite helpful MT core dev like **sfan5**
 https://github.com/sfan5

 > IrrlichtMt supports OpenGL 1.4 and newer but requires reasonably up-to-
 date OpenGL headers to build (actual support is checked at runtime), which
 you can get from
 [**Khronos**](https://registry.khronos.org/OpenGL/index_gl.php). Irrlicht
 used to bundle these headers but we no longer do to simplify maintenance.
 >
 > Alternatively if it's just this symbol you can try to `#define
 GL_TEXTURE_CUBE_MAP_SEAMLESS 0x884F` somewhere.

 - https://github.com/minetest/irrlicht/issues/152#issuecomment-1369131242

 Hope this helps. However, I am lacking the 10.6 platform momentarily if
 not indefinitely.

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Ticket URL: <https://trac.macports.org/ticket/66439#comment:14>
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