diff --git a/Makefile b/Makefile
index 6db5e87a7..1e1860a63 100755
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,5 @@
 SOURCES := *.c
-HEADERS := *.h
+HEADERS := font.h hmap.h http.h md5.h icon.h update.h version.h
 
 CFLAGS := -Wall -std=c99 -D_POSIX_C_SOURCE=200112L
 OFLAGS := -O3 -ffast-math -ftree-vectorize -funsafe-math-optimizations
@@ -11,7 +11,7 @@ MFLAGS_SSE3 := -march=k8 -DX86 -DX86_SSE3 -msse3
 MFLAGS_SSE2 := -march=k8 -DX86 -DX86_SSE2 -msse2
 MFLAGS_SSE := -march=pentium3 -DX86 -DX86_SSE
 FLAGS_DBUG := -Wall -std=c99 -D_POSIX_C_SOURCE=200112L -pg -O2 -march=k8 -DX86 -DX86_SSE3 -msse3 -lSDL -lm -lpthread -lbz2
-COMPILER := clang
+COMPILER := gcc
 LINUX_TARG := powder-64-sse2 powder-sse powder-sse2
 WIN32_TARG := powder-sse.exe powder-sse2.exe
 
diff --git a/graphics.c b/graphics.c
index e06122bad..a6f83f3dc 100644
--- a/graphics.c
+++ b/graphics.c
@@ -756,11 +756,11 @@ void draw_menu(pixel *vid_buf, int i, int hover)
     }
 }
 
-/*#ifdef WIN32
+#ifdef WIN32
 _inline void drawpixel(pixel *vid, int x, int y, int r, int g, int b, int a)
-#else*/
+#else
 inline void drawpixel(pixel *vid, int x, int y, int r, int g, int b, int a)
-//#endif
+#endif
 {
     pixel t;
     if(x<0 || y<0 || x>=XRES+BARSIZE || y>=YRES+MENUSIZE)
@@ -799,7 +799,7 @@ inline int drawchar(pixel *vid, int x, int y, int c, int r, int g, int b, int a)
     return x + w;
 }
 
-int drawtext(pixel *vid, int x, int y, const char *s, int r, int g, int b, int a)
+int drawtext(pixel *vid, int x, int y, char *s, int r, int g, int b, int a)
 {
 #ifdef OpenGL
 #else
@@ -2352,4 +2352,4 @@ void ClearScreen()
 {
 	glClear(GL_COLOR_BUFFER_BIT);
 }
-#endif
+#endif
\ No newline at end of file
diff --git a/graphics.h b/graphics.h
index 7f1c744a3..edeab389b 100644
--- a/graphics.h
+++ b/graphics.h
@@ -75,7 +75,7 @@ _inline int drawchar(pixel *vid, int x, int y, int c, int r, int g, int b, int a
 inline int drawchar(pixel *vid, int x, int y, int c, int r, int g, int b, int a);
 #endif
 
-int drawtext(pixel *vid, int x, int y, const char *s, int r, int g, int b, int a);
+int drawtext(pixel *vid, int x, int y, char *s, int r, int g, int b, int a);
 
 void drawrect(pixel *vid, int x, int y, int w, int h, int r, int g, int b, int a);
 
@@ -141,4 +141,4 @@ void RenderScene ();
 void ClearScreen();
 #endif
 
-#endif
+#endif
\ No newline at end of file
diff --git a/interface.c b/interface.c
index bb9c37c98..f6ef74901 100644
--- a/interface.c
+++ b/interface.c
@@ -11,7 +11,7 @@
 #include "powder.h"
 #include "interface.h"
 #include "misc.h"
-#include "graphics.h"
+
 SDLMod sdl_mod;
 int sdl_key, sdl_wheel, sdl_caps=0, sdl_ascii, sdl_zoom_trig=0;
 
@@ -2819,4 +2819,4 @@ int execute_vote(pixel *vid_buf, char *id, char *action)
     if(result)
         free(result);
     return 1;
-}
+}
\ No newline at end of file
diff --git a/main.c b/main.c
index 5fc9ac161..9b9b4d240 100644
--- a/main.c
+++ b/main.c
@@ -49,7 +49,7 @@
 #include "hmap.h"
 #include "air.h"
 
-static const char *it_msg =
+char *it_msg =
     "\brThe Powder Toy\n"
     "\x7F\x7F\x7F\x7F\x7F\x7F\x7F\x7F\x7F\x7F\x7F\x7F\x7F\x7F\x7F\x7F\x7F\x7F\x7F\n"
     "\n"
@@ -129,7 +129,7 @@ int core_count()
     return numCPU;
 }
 
-int mousex = 0, mousey = 0;  //They contain mouse position
+int mousex, mousey = 0;  //They contain mouse position
 
 void sdl_seticon(void)
 {
@@ -140,12 +140,10 @@ void sdl_seticon(void)
 #ifdef MACOSX
     //SDL_Surface *icon = SDL_CreateRGBSurfaceFrom(app_icon_w32, 32, 32, 32, 128, 0x000000FF, 0x0000FF00, 0x00FF0000, 0xFF000000);
     //SDL_WM_SetIcon(icon, NULL/*app_icon_mask*/);
-/* Does currently not work #else
+#else
     SDL_Surface *icon = SDL_CreateRGBSurfaceFrom(app_icon, 16, 16, 32, 128, 0x000000FF, 0x0000FF00, 0x00FF0000, 0xFF000000);
-    SDL_WM_SetIcon(icon, NULLapp_icon_mask)//app_icon mask;
-*/
+    SDL_WM_SetIcon(icon, NULL/*app_icon_mask*/);
 #endif
-
 #endif
 }
 
diff --git a/powder.c b/powder.c
index 78906f65d..706c9622a 100644
--- a/powder.c
+++ b/powder.c
@@ -4,6 +4,22 @@
 #include "air.h"
 #include "misc.h"
 
+int isplayer = 0;
+float player[20]; //[0] is a command cell, [3]-[18] are legs positions, [19] is index
+
+particle *parts;
+particle *cb_parts;
+
+unsigned char bmap[YRES/CELL][XRES/CELL];
+unsigned char emap[YRES/CELL][XRES/CELL];
+
+unsigned char cb_bmap[YRES/CELL][XRES/CELL];
+unsigned char cb_emap[YRES/CELL][XRES/CELL];
+
+int pfree;
+
+unsigned pmap[YRES][XRES];
+unsigned cb_pmap[YRES][XRES];
 
 int try_move(int i, int x, int y, int nx, int ny)
 {
@@ -2855,4 +2871,4 @@ void create_line(int x1, int y1, int x2, int y2, int r, int c)
             e -= 1.0f;
         }
     }
-}
+}
\ No newline at end of file
diff --git a/powder.h b/powder.h
index b2e70a9db..7bd2a9c64 100644
--- a/powder.h
+++ b/powder.h
@@ -174,7 +174,7 @@ struct part_state
 };
 typedef struct part_state part_state;
 
-static const part_type ptypes[PT_NUM] =
+static part_type ptypes[PT_NUM] =
 {
     //Name		Colour				Advec	Airdrag			Airloss	Loss	Collid	Grav	Diffus	Hotair			Fal Burn	Exp	Mel Hrd M	Section			H				Ins(real world, by triclops200) Description
     {"",		PIXPACK(0x000000),	0.0f,	0.00f * CFDS,	1.00f,	0.00f,	0.0f,	0.0f,	0.00f,	0.000f	* CFDS,	0,	0,		0,	0,	1,	1,	SC_SPECIAL,		R_TEMP+0.0f,	251,	"Erases particles."},
@@ -246,7 +246,7 @@ static const part_type ptypes[PT_NUM] =
     //Name		Colour				Advec	Airdrag			Airloss	Loss	Collid	Grav	Diffus	Hotair			Fal Burn	Exp	Mel Hrd M	Section			H				Ins(real world, by triclops200) Description    
 };
 
-static const part_state pstates[PT_NUM] =
+static part_state pstates[PT_NUM] =
 {
     // Name					Solid	 Frzp		Liquid   Mpnt		Gas	   Bpoint
     /* NONE */ {ST_NONE,	PT_NONE, 0.0f,		PT_NONE, 0.0f,		PT_NONE, 0.0f,		PT_NONE, 0.0f},
@@ -316,7 +316,7 @@ static const part_state pstates[PT_NUM] =
 	/* DYST */ {ST_SOLID,	PT_NONE, 0.0f,		PT_DUST, 200.0f,	PT_NONE, 0.0f,		PT_NONE, 0.0f},
 	/* THRM */ {ST_SOLID,	PT_NONE, 0.0f,		PT_NONE, 0.0f,		PT_NONE, 0.0f,		PT_NONE, 0.0f},
 };
-static const unsigned char can_move[PT_NUM][PT_NUM] =
+static unsigned char can_move[PT_NUM][PT_NUM] =
 {
     /*   A B */
     /* A 0 1 | B ligher than A */
@@ -398,21 +398,21 @@ static const unsigned char can_move[PT_NUM][PT_NUM] =
 /*          e t r l e l a p r e s x m i e k w d t t t d d v t w t w d l t t n   x n n   u l l m d N d s n a r m d e E y y M H E s l l     R T*/
 };
 
-int isplayer;
-float player[20];
+extern int isplayer;
+extern float player[20];
 
-particle *parts;
-particle *cb_parts;
+extern particle *parts;
+extern particle *cb_parts;
 
-unsigned char bmap[YRES/CELL][XRES/CELL];
-unsigned char emap[YRES/CELL][XRES/CELL];
+extern unsigned char bmap[YRES/CELL][XRES/CELL];
+extern unsigned char emap[YRES/CELL][XRES/CELL];
 
-unsigned char cb_bmap[YRES/CELL][XRES/CELL];
-unsigned char cb_emap[YRES/CELL][XRES/CELL];
+extern unsigned char cb_bmap[YRES/CELL][XRES/CELL];
+extern unsigned char cb_emap[YRES/CELL][XRES/CELL];
 
-int pfree;
+extern int pfree;
 
-unsigned pmap[YRES][XRES];
+extern unsigned pmap[YRES][XRES];
 unsigned cb_pmap[YRES][XRES];
 
 int try_move(int i, int x, int y, int nx, int ny);
@@ -467,4 +467,4 @@ int create_parts(int x, int y, int r, int c);
 
 void create_line(int x1, int y1, int x2, int y2, int r, int c);
 
-#endif
+#endif
\ No newline at end of file