[gtkada] Configure doesn't find openGL

[Roger Mc Murtrie]

This is outside my expertise.
Perhaps Pascal can advise?
Roger

> On 5 Sep 2016, at 10:25 PM, Emmanuel Briot <briot at adacore.com> wrote:
> 
>> If I omit --with-GL-prefix=/usr/X11
>> I get:
>> configure: error: Missing OpenGL library
> 
> right, I noticed this as well. But doesn't this mean we should find some other OpenGL library
> on OSX (and thus need further refinement to configure) rather than rely on an X11 library,
> when the rest of gtk+ doesn't use X11 on that platform ?
> 
> Emmanuel
>