[MacPorts] #71257: gegl-devel does not build with gcc now due to added ObjC stuff

[MacPorts]

#71257: gegl-devel does not build with gcc now due to added ObjC stuff
--------------------------+------------------------
 Reporter:  barracuda156  |      Owner:  (none)
     Type:  defect        |     Status:  new
 Priority:  Normal        |  Milestone:
Component:  ports         |    Version:  2.10.4
 Keywords:                |       Port:  gegl-devel
--------------------------+------------------------
 Upstream issue: https://gitlab.gnome.org/GNOME/gegl/-/issues/393

 Immediate breakage is unconditional passing of an invalid `-ObjC` flag,
 but unfortunately just dropping it does not fix the build, it fails with a
 lot of errors on Apple headers.

 If there are no better fixes, at least we could conditionally revert
 breaking commits:
 https://gitlab.gnome.org/GNOME/gegl/-/commit/72d86816289c11fdd871b701827f8bf0016a7f4f
 https://gitlab.gnome.org/GNOME/gegl/-/commit/f0ac129d3f905c3f7e307c02a1b451ac10231bfe
 https://gitlab.gnome.org/GNOME/gegl/-/commit/bf3c21630d7550083233c16baeabedc38fb96390

 But hopefully there is a better way.

-- 
Ticket URL: <https://trac.macports.org/ticket/71257>
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