I successfully built the module and loaded it to emacs by

(add-to-list 'load-path "~/.emacs.d/lisp")

(org-babel-do-load-languages
 'org-babel-load-languages
 '((glsl . t)))

However, I always get no result, the .png file is always an empty 1 Kb image only.

When compiling the module, I get this warning:

[3/4] Building CXX object CMakeFiles/ob-glsl-module.dir/Main.cpp.o
Main.cpp:86:40: warning: implicit conversion of nullptr constant to 'bool' [-Wnull-conversion]
        glbinding::Binding::initialize(nullptr);
        ~~~~~~~~~                      ^~~~~~~
                                       false
1 warning generated.
[4/4] Linking CXX shared library ob-glsl-module.dylib

Maybe this is the reason?

I have very limited knowledge both Emacs modules in C or openGL, and I am not sure about how to debug in this situation. Sorry for that.

Also, the glbinding from my package manager is still 2.1.4.

CMake Error at CMakeLists.txt:11 (add_library):
  Target "ob-glsl-module" links to target "SDL2::SDL2-static" but the target
  was not found.  Perhaps a find_package() call is missing for an IMPORTED
  target, or an ALIAS target is missing?

For unknown and mythical reason, on Archlinux, the static lib is named as libSDL2main.a rather than libSDL2.a. https://github.com/archlinux/svntogit-packages/blob/07aecf0c44807cd19307b693b9768e3557dc0d53/trunk/PKGBUILD#L51

To build on Archlinux, one have to change this line

target_link_libraries(${PROJECT_NAME} SDL2::SDL2-static ${GLBINDING_LIB} ${SDL2_IMAGE_LIB})

to

target_link_libraries(${PROJECT_NAME} SDL2::SDL2main ${GLBINDING_LIB} ${SDL2_IMAGE_LIB})

And the ob-glsl works :D :+1:

rob@oven:~/src/ob-glsl$ ninja
[1/2] Building CXX object CMakeFiles/ob-glsl-module.dir/Main.cpp.o
FAILED: CMakeFiles/ob-glsl-module.dir/Main.cpp.o 
/usr/bin/c++  -Dob_glsl_module_EXPORTS -I/usr/local/include -fPIC   -std=gnu++17 -MD -MT CMakeFiles/ob-glsl-module.dir/Main.cpp.o -MF CMakeFiles/ob-glsl-module.dir/Main.cpp.o.d -o CMakeFiles/ob-glsl-module.dir/Main.cpp.o -c Main.cpp
Main.cpp:92:14: error: expected type-specifier
     operator glbinding::GetProcAddress() const {return nullptr;}
              ^~~~~~~~~
ninja: build stopped: subcommand failed.
rob@oven:~/src/ob-glsl$ 

The following allows for loading this package via quelpa directly from .emacs as follows:

(use-package glsl-mode)
(use-package ob-glsl
  :after glsl-mode
  :quelpa (ob-glsl
		   :fetcher github
		   :repo "finalpatch/ob-glsl"
		   :files ("*.el" "*.cpp" "*.hpp" "CMakeLists.txt" "*.h" "*.so"))
  :custom
  (org-babel-do-load-languages
   'org-babel-load-languages
   '((glsl . t))))

Obviously, replace "finalpatch/ob-glsl" with "shizcow/ob-glsl" for a working example.

Being able to load this package with quelpa makes it one step closer to being melpa-compatible and able to be loaded with a simple (use-package ob-glsl).

Note on cleanliness

I'm not particularly versed in writing emacs packages, so I probable made some big mistakes here. The provided changes aren't really intended as a final product, but as a push towards the eventual goal of making this package more accessible.