fix probably everything

CMakeLists.txt

@@ -14,13 +14,13 @@ set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/CMake")
 find_package(SDL2 REQUIRED)
 find_package(OpenGL REQUIRED)
 
-if(CMAKE_C_COMPILER_ID STREQUAL "MSVC")
-	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /MT /Oy /Oi /W3 /FAcs /GF /fp:fast /wd4996 /D_CRT_SECURE_NO_DEPRECATE")
-	set(CMAKE_C_FLAGS   "${CMAKE_C_FLAGS}   /MT /Oy /Oi /W3 /FAcs /GF /fp:fast /wd4996 /D_CRT_SECURE_NO_DEPRECATE")
+if(CMAKE_C_COMPILER_ID STREQUAL MSVC)
+	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /MT /Oy /Oi /W3 /FAcs /GF /fp:fast /wd4996 /D_CRT_SECURE_NO_DEPRECATE /D_CRT_SECURE_NO_WARNINGS")
+	set(CMAKE_C_FLAGS   "${CMAKE_C_FLAGS}   /MT /Oy /Oi /W3 /FAcs /GF /fp:fast /wd4996 /D_CRT_SECURE_NO_DEPRECATE /D_CRT_SECURE_NO_WARNINGS")
 	add_definitions(-DHAVE_FAST_MATH)
 endif()
 
-if(CMAKE_C_COMPILER_ID STREQUAL "GNU" OR CMAKE_C_COMPILER_ID STREQUAL "Clang")
+if(CMAKE_C_COMPILER_ID STREQUAL GNU OR CMAKE_C_COMPILER_ID STREQUAL Clang)
 	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -ffast-math")
 	set(CMAKE_C_FLAGS   "${CMAKE_C_FLAGS}   -ffast-math")
 	set(MATHLIB m)
@@ -39,7 +39,7 @@ include_directories(
 
 add_executable(${PROJ_NAME} WIN32
 	${SRC}/main.c
-	${SRC}/gl_core_3_3.c
+	${SRC}/gl_2_1.c
 )
 
 target_link_libraries(${PROJ_NAME}

main.c

@@ -1,7 +1,7 @@
-#include "gl_core_3_3.h"
+#include "gl_2_1.h"
 #include "SDL.h"
-#include "SDL_opengl.h"
 #include <stdio.h>
+#include <stdlib.h>
 
 struct renderinfo
 {
@@ -149,15 +149,14 @@ void R_Init()
 	// Init GL info.
 	SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 2);
 	SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 1);
-	SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE);
-
 	// Init window.
-	SDL_CreateWindowAndRenderer(re.ScrW, re.ScrH, SDL_WINDOW_SHOWN, &re.Window, &re.Renderer);
+	SDL_CreateWindowAndRenderer(re.ScrW, re.ScrH, SDL_WINDOW_OPENGL | SDL_WINDOW_SHOWN, &re.Window, &re.Renderer);
 
 	// Init GL context.
 	re.Context = SDL_GL_CreateContext(re.Window);
-	ogl_LoadFunctions();
 	SDL_GL_SetSwapInterval(1);
+	
+	ogl_LoadFunctions();
 
 	R_InitGL();