To validate this vertex shader (file vs.vert), just use type this command: Vec4 eye = gxl3d_ModelViewMatrix * gxl3d_Position Gl_Position = gxl3d_ModelViewProjectionMatrix * gxl3d_Position Uniform mat4 gxl3d_ModelViewProjectionMatrix I quickly tested glslLangValidator with the following GLSL 1.40 (OpenGL 3.1) vertex shader took from GLSL Hacker code sample pack. You can download the command line version from HERE. More information about can be found here: OpenGL / OpenGL ES Reference Compiler. It is open and free for anyone to use, either from a command line or programmatically. It implements a strict interpretation of the specifications for these languages. glslLangValidator is the official reference compiler front end for both OpenGL ES and OpenGL shading languages. GlslLangValidator is GLSL tool for Windows / Linux released by the Khronos Group.
