I get this error when I try to bind the shader:
QGLShader::link: "WARNING: vertex shader writes varying 'spot' which is not active.
WARNING: vertex shader writes varying 'nv' which is not active.
WARNING: vertex shader writes varying 'lv' which is not active.
WARNING: vertex shader writes varying 'vv' which is not active.
"spot", "nv", "lv" and "vv" are varying, which are written in the vertex shader and read in the fragment shader.
Did anyone face this issue?