Add submodules to Makefile and clean up some imports

src/Makefile

@@ -632,8 +632,19 @@ endif
 # Compile all modules with their prerequisites
 
 # Compile core module
-rcore.o : rcore.c raylib.h rlgl.h utils.h raymath.h rcamera.h rgestures.h
-	$(CC) -c $< $(CFLAGS) $(INCLUDE_PATHS)
+RCORE_SUBMODULE=rcore_desktop.c
+ifeq ($(PLATFORM),PLATFORM_ANDROID)
+    RCORE_SUBMODULE=rcore_android.c
+endif
+ifeq ($(PLATFORM),PLATFORM_DRM)
+    RCORE_SUBMODULE=rcore_drm.c
+endif
+ifeq ($(PLATFORM),PLATFORM_WEB)
+    RCORE_SUBMODULE=rcore_web.c
+endif
+
+rcore.o : rcore.c raylib.h rlgl.h utils.h raymath.h rcamera.h rgestures.h rcore.h 
+	$(CC) -c $< $(RCORE_SUBMODULE) $(CFLAGS) $(INCLUDE_PATHS)
 
 # Compile rglfw module
 rglfw.o : rglfw.c

src/rcore.c

@@ -106,8 +106,6 @@
     #include "config.h"             // Defines module configuration flags
 #endif
 
-#include "utils.h"                  // Required for: TRACELOG() macros
-
 #define RLGL_IMPLEMENTATION
 #include "rlgl.h"                   // OpenGL abstraction layer to OpenGL 1.1, 3.3+ or ES2
 
@@ -167,12 +165,6 @@
     #endif // OSs
 #endif // PLATFORM_DESKTOP
 
-#include <stdlib.h>                 // Required for: srand(), rand(), atexit()
-#include <stdio.h>                  // Required for: sprintf() [Used in OpenURL()]
-#include <string.h>                 // Required for: strrchr(), strcmp(), strlen(), memset()
-#include <time.h>                   // Required for: time() [Used in InitTimer()]
-#include <math.h>                   // Required for: tan() [Used in BeginMode3D()], atan2f() [Used in LoadVrStereoConfig()]
-
 #define _CRT_INTERNAL_NONSTDC_NAMES  1
 #include <sys/stat.h>               // Required for: stat(), S_ISREG [Used in GetFileModTime(), IsFilePath()]
 

src/rcore.h

@@ -1,6 +1,22 @@
 #ifndef RCORE_H
 #define RCORE_H
 
+#include <stdlib.h>                 // Required for: srand(), rand(), atexit()
+#include <stdio.h>                  // Required for: sprintf() [Used in OpenURL()]
+#include <string.h>                 // Required for: strrchr(), strcmp(), strlen(), memset()
+#include <time.h>                   // Required for: time() [Used in InitTimer()]
+#include <math.h>                   // Required for: tan() [Used in BeginMode3D()], atan2f() [Used in LoadVrStereoConfig()]
+
+#include "utils.h"                  // Required for: TRACELOG() macros
+
+#if defined(PLATFORM_DESKTOP)
+    #define GLFW_INCLUDE_NONE       // Disable the standard OpenGL header inclusion on GLFW3
+                                    // NOTE: Already provided by rlgl implementation (on glad.h)
+    #include "GLFW/glfw3.h"         // GLFW3 library: Windows, OpenGL context and Input management
+                                    // NOTE: GLFW3 already includes gl.h (OpenGL) headers
+#endif
+
+
 // PROVIDE A HEADER TO BE USED BY ALL THE rcore_* IMPLEMENTATIONS.
 /*
 
@@ -117,6 +133,16 @@ typedef struct CoreData {
         char **dropFilepaths;         // Store dropped files paths pointers (provided by GLFW)
         unsigned int dropFileCount;         // Count dropped files strings
 
+        struct {
+            float width;
+            float height;
+        } windowMin;
+
+        struct {
+            float width;
+            float height;
+        } windowMax;
+
     } Window;
 #if defined(PLATFORM_ANDROID)
     struct {