4 * require_extensions: GL_ARB_shading_language_420pack
7 * From the GL_ARB_shading_language_420pack spec:
9 * "It is an error to use any auxiliary or interpolation qualifiers on a
10 * vertex shader input."
12 * Test that an interpolation qualifier on a vertex shader input results in a
16 #extension GL_ARB_shading_language_420pack: enable