[MacPorts] #61174: supertuxkart @1.2: undefined symbols "_glBlendEquationiARB", "_glBlendFunciARB" on 10.7

[MacPorts]

#61174: supertuxkart @1.2: undefined symbols "_glBlendEquationiARB",
"_glBlendFunciARB" on 10.7
--------------------------+--------------------------
 Reporter:  chrstphrchvz  |      Owner:  (none)
     Type:  defect        |     Status:  new
 Priority:  Normal        |  Milestone:
Component:  ports         |    Version:  2.6.3
 Keywords:                |       Port:  supertuxkart
--------------------------+--------------------------
 [https://build.macports.org/builders/ports-10.7_x86_64-builder/builds/30546/steps
 /install-port/logs/stdio Build fails on 10.7]:
 {{{
 Undefined symbols for architecture x86_64:
   "_glBlendEquationiARB", referenced from:
 irr::video::COpenGLDriver::setRenderTarget(irr::core::array<irr::video::IRenderTarget,
 irr::core::irrAllocator<irr::video::IRenderTarget> > const&, bool, bool,
 irr::video::SColor) in libstkirrlicht.a(COpenGLDriver.cpp.o)
   "_glBlendFunciARB", referenced from:
 irr::video::COpenGLDriver::setRenderTarget(irr::core::array<irr::video::IRenderTarget,
 irr::core::irrAllocator<irr::video::IRenderTarget> > const&, bool, bool,
 irr::video::SColor) in libstkirrlicht.a(COpenGLDriver.cpp.o)
 }}}
 I'm not sure why this error happens: any
 `glBlendFunciARB()`/`glBlendEquationiARB()` usage is
 [https://github.com/supertuxkart/stk-
 code/blob/1.2/lib/irrlicht/source/Irrlicht/COpenGLExtensionHandler.h#L2338
 guarded] by `#elif defined(GL_ARB_draw_buffers_blend)`, which is
 [https://github.com/phracker/MacOSX-
 SDKs/blob/9fc3ed0ad0345950ac25c28695b0427846eea966/MacOSX10.9.sdk/System/Library/Frameworks/OpenGL.framework/Versions/A/Headers/gl3ext.h#L170
 defined in 10.9 SDK], but not 10.8 or earlier (I'm not sure why the 10.8
 build succeeds); see "ARB_draw_buffers_blend" extension in
 [http://arek.bdmonkeys.net/GLInfo/GLInfo_1085_Core.html macOS OpenGL
 capabilities tables]. Whether this functionality is available at runtime
 is probably also dependent on what GPU is present.

 (I personally do not use this port.)

-- 
Ticket URL: <https://trac.macports.org/ticket/61174>
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