From: Mikko Rasa <tdb@tdb.fi>
Date: Fri, 6 Jan 2017 11:48:17 +0000 (+0200)
Subject: Guard against missing extensions on OS X
X-Git-Url: http://git.tdb.fi/?a=commitdiff_plain;h=726e4dac25deeb9e4584226bdbafa1fd93ba3162;hp=726e4dac25deeb9e4584226bdbafa1fd93ba3162;p=libs%2Fgl.git

Guard against missing extensions on OS X

Symbols are linked directly so the definitions must be present in the
system OpenGL library at compile time.
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