glad sdl initialization
I am trying to initialize glad as `gladLoadGL((GLADloadfunc) SDL_GL_GetProcAddress);` but I get the error: `use of undeclared identifier` . I have properly installed the glad header files and have included the `glad.c` in my project. I had generated an Opengl 3.3 core profile glad from the website. Should I initialize it as `gladLoadGLLoader(SDL_GL_GetProcAddress);`? Also  many many macros like GLAD_VERSION_MAJOR and GLAD_VERSION_MINOR and also the GLADloadfunc are missing.