Gonstruct: gtk2.20.1 and gtkglextmm 1.2.0

[napo_p2p]

I was trying to create a MacPort for gonstruct, but I hit a road bump. It looks like there is an incompatibility between gtk2.20.1 and gtkglextmm (on Macs, at least).

With gtk2.20, gonstruct crashes when loading/opening a level with the following error:

NPC Code:

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Symbol not found: _GTK_WIDGET_NO_WINDOW

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However, when I downgrade gtk to 2.18, the error goes away, and gonstruct works just fine.

I just want to determine if this issue is Mac-related, or widespread... Is anyone running (or tried running) gonstruct with gtk 2.20.1?