This is just a right port file to build gstreamer1-gst-plugins-base

 This port file does build the plugin like it must be done with gl support.
 Of course som improvements can be done by for example removing the
 setting -Dgl=enabled totally. This is done by meson. gls will be automatically enabled if you're build (native or cross platform)
 does contain the opengl and or variants of opengl. The now extra option that I set for x11 variant build
 -Dgl-winsys='x11, cocoa' could also by 'auto' or actually just ommited. Meson does set this automatically.
 It is of course well possible that if you're building without x11 that you must limit the gl-winsys.

 On branch cvrwork
 Changes to be committed:
	modified:   gnome/gstreamer1-gst-plugins-base/Portfile

gnome/gstreamer1-gst-plugins-base/Portfile

@@ -91,6 +91,8 @@ variant x11 {
                     -Dxvideo=enabled \
                     -Dgl=disabled \
                     -Dgl=enabled
+    configure.args-append \
+                    -Dgl_winsys='x11, cocoa'
 }
 
 variant ogg description {Build with support for libogg, libvorbis, libtheora} {