common symbols for window and text

src/bg.c

@@ -42,7 +42,7 @@ static struct BgConfig2 sGpuBgConfigs2[4];
 static u32 sDmaBusyBitfield[4];
 static u8 gpu_tile_allocation_map_bg[0x100];
 
-u32 gWindowTileAutoAllocEnabled;
+bool32 gWindowTileAutoAllocEnabled;
 
 static const struct BgConfig sZeroedBgControlStruct = { 0 };
 

src/window.c

@@ -3,9 +3,8 @@
 #include "malloc.h"
 #include "bg.h"
 
-extern u8 gWindowClearTile;
-extern void* gWindowBgTilemapBuffers[];
-extern u32 gWindowTileAutoAllocEnabled;
+u8 gWindowClearTile;
+void *gWindowBgTilemapBuffers[4];
 
 EWRAM_DATA struct Window gWindows[WINDOWS_MAX] = {0};
 

src/window_8bpp.c

@@ -3,8 +3,6 @@
 #include "malloc.h"
 #include "bg.h"
 
-extern void* gWindowBgTilemapBuffers[];
-
 EWRAM_DATA static struct Window* sWindowPtr = NULL;
 EWRAM_DATA static u16 sWindowSize = 0;