ENH: Changed GL_REQUIRED_VERSION from (testing) 3.1.2 to (real) 2.0.0.
ENH: Changed GL_REQUIRED_VERSION from (testing) 3.1.2 to (real) 2.0.0.

orfeotoolbox/OTB,orfeotoolbox/OTB,orfeotoolbox/OTB,orfeotoolbox/OTB,orfeotoolbox/OTB,orfeotoolbox/OTB