gcc5 inline semantics changed and caused a build fauilure (bug #568618).

--- mirrormagic-2.0.2.orig/src/libgame/misc.h
+++ mirrormagic-2.0.2/src/libgame/misc.h
@@ -137,8 +137,8 @@
 void sortLevelDirInfo(struct LevelDirInfo **,
 		      int (*compare_function)(const void *, const void *));
 
-inline void swap_numbers(int *, int *);
-inline void swap_number_pairs(int *, int *, int *, int *);
+extern inline void swap_numbers(int *, int *);
+extern inline void swap_number_pairs(int *, int *, int *, int *);
 
 char *getUserDataDir(void);
 char *getSetupDir(void);
--- mirrormagic-2.0.2.orig/src/libgame/msdos.h
+++ mirrormagic-2.0.2/src/libgame/msdos.h
@@ -711,7 +711,7 @@
 Pixmap XCreatePixmap(Display *, Drawable, unsigned int, unsigned int,
 		     unsigned int);
 void XSync(Display *, Bool);
-inline void XCopyArea(Display *, Drawable, Drawable, GC, int, int,
+extern inline void XCopyArea(Display *, Drawable, Drawable, GC, int, int,
 		      unsigned int, unsigned int, int, int);
 int Read_PCX_to_Pixmap(Display *, Window, GC, char *, Pixmap *, Pixmap *);
 int XReadBitmapFile(Display *, Drawable, char *,
--- mirrormagic-2.0.2.orig/src/libgame/sdl.h
+++ mirrormagic-2.0.2/src/libgame/sdl.h
@@ -314,20 +314,20 @@
 
 /* SDL function definitions */
 
-inline void SDLInitVideoDisplay(void);
-inline void SDLInitVideoBuffer(DrawBuffer **, DrawWindow **, boolean);
-inline boolean SDLSetVideoMode(DrawBuffer **, boolean);
-inline void SDLCopyArea(Bitmap *, Bitmap *, int, int, int, int, int, int, int);
-inline void SDLFillRectangle(Bitmap *, int, int, int, int, unsigned int);
-inline void SDLDrawSimpleLine(Bitmap *, int, int, int, int, unsigned int);
-inline void SDLDrawLine(Bitmap *, int, int, int, int, Uint32);
-inline Pixel SDLGetPixel(Bitmap *, int, int);
+extern inline void SDLInitVideoDisplay(void);
+extern inline void SDLInitVideoBuffer(DrawBuffer **, DrawWindow **, boolean);
+extern inline boolean SDLSetVideoMode(DrawBuffer **, boolean);
+extern inline void SDLCopyArea(Bitmap *, Bitmap *, int, int, int, int, int, int, int);
+extern inline void SDLFillRectangle(Bitmap *, int, int, int, int, unsigned int);
+extern inline void SDLDrawSimpleLine(Bitmap *, int, int, int, int, unsigned int);
+extern inline void SDLDrawLine(Bitmap *, int, int, int, int, Uint32);
+extern inline Pixel SDLGetPixel(Bitmap *, int, int);
 
 Bitmap *SDLLoadImage(char *);
 
-inline void SDLOpenAudio(void);
-inline void SDLCloseAudio(void);
+extern inline void SDLOpenAudio(void);
+extern inline void SDLCloseAudio(void);
 
-inline void SDLNextEvent(Event *);
+extern inline void SDLNextEvent(Event *);
 
 #endif /* SDL_H */
--- mirrormagic-2.0.2.orig/src/libgame/system.c
+++ mirrormagic-2.0.2/src/libgame/system.c
@@ -172,12 +172,12 @@
 /* video functions                                                           */
 /* ========================================================================= */
 
-inline static int GetRealDepth(int depth)
+static int GetRealDepth(int depth)
 {
   return (depth == DEFAULT_DEPTH ? video.default_depth : depth);
 }
 
-inline void InitVideoDisplay(void)
+void InitVideoDisplay(void)
 {
 #if defined(TARGET_SDL)
   SDLInitVideoDisplay();
@@ -186,7 +186,7 @@
 #endif
 }
 
-inline void CloseVideoDisplay(void)
+void CloseVideoDisplay(void)
 {
   KeyboardAutoRepeatOn();
 
@@ -198,7 +198,7 @@
 #endif
 }
 
-inline void InitVideoBuffer(DrawBuffer **backbuffer, DrawWindow **window,
+void InitVideoBuffer(DrawBuffer **backbuffer, DrawWindow **window,
 			    int width, int height, int depth,
 			    boolean fullscreen)
 {
@@ -215,7 +215,7 @@
 #endif
 }
 
-inline Bitmap *CreateBitmapStruct(void)
+Bitmap *CreateBitmapStruct(void)
 {
 #ifdef TARGET_SDL
   return checked_calloc(sizeof(struct SDLSurfaceInfo));
@@ -224,7 +224,7 @@
 #endif
 }
 
-inline Bitmap *CreateBitmap(int width, int height, int depth)
+Bitmap *CreateBitmap(int width, int height, int depth)
 {
   Bitmap *new_bitmap = CreateBitmapStruct();
   int real_depth = GetRealDepth(depth);
@@ -265,7 +265,7 @@
   return new_bitmap;
 }
 
-inline void FreeBitmap(Bitmap *bitmap)
+void FreeBitmap(Bitmap *bitmap)
 {
   if (bitmap == NULL)
     return;
@@ -287,7 +287,7 @@
   free(bitmap);
 }
 
-inline void CloseWindow(DrawWindow *window)
+void CloseWindow(DrawWindow *window)
 {
 #ifdef TARGET_X11
   if (window->drawable)
@@ -300,7 +300,7 @@
 #endif
 }
 
-inline void BlitBitmap(Bitmap *src_bitmap, Bitmap *dst_bitmap,
+void BlitBitmap(Bitmap *src_bitmap, Bitmap *dst_bitmap,
 		       int src_x, int src_y,
 		       int width, int height,
 		       int dst_x, int dst_y)
@@ -314,7 +314,7 @@
 #endif
 }
 
-inline void ClearRectangle(Bitmap *bitmap, int x, int y, int width, int height)
+void ClearRectangle(Bitmap *bitmap, int x, int y, int width, int height)
 {
 #ifdef TARGET_SDL
   SDLFillRectangle(bitmap, x, y, width, height, 0x000000);
@@ -329,7 +329,7 @@
 #endif
 #endif
 
-inline void SetClipMask(Bitmap *bitmap, GC clip_gc, Pixmap clip_pixmap)
+void SetClipMask(Bitmap *bitmap, GC clip_gc, Pixmap clip_pixmap)
 {
 #ifdef TARGET_X11
   if (clip_gc)
@@ -343,7 +343,7 @@
 #endif
 }
 
-inline void SetClipOrigin(Bitmap *bitmap, GC clip_gc, int clip_x, int clip_y)
+void SetClipOrigin(Bitmap *bitmap, GC clip_gc, int clip_x, int clip_y)
 {
 #ifdef TARGET_X11
   if (clip_gc)
@@ -357,7 +357,7 @@
 #endif
 }
 
-inline void BlitBitmapMasked(Bitmap *src_bitmap, Bitmap *dst_bitmap,
+void BlitBitmapMasked(Bitmap *src_bitmap, Bitmap *dst_bitmap,
 			     int src_x, int src_y,
 			     int width, int height,
 			     int dst_x, int dst_y)
@@ -371,7 +371,7 @@
 #endif
 }
 
-inline void DrawSimpleWhiteLine(Bitmap *bitmap, int from_x, int from_y,
+void DrawSimpleWhiteLine(Bitmap *bitmap, int from_x, int from_y,
 				int to_x, int to_y)
 {
 #ifdef TARGET_SDL
@@ -384,7 +384,7 @@
 }
 
 #if !defined(TARGET_X11_NATIVE)
-inline void DrawLine(Bitmap *bitmap, int from_x, int from_y,
+void DrawLine(Bitmap *bitmap, int from_x, int from_y,
 		     int to_x, int to_y, Pixel pixel, int line_width)
 {
   int x, y;
@@ -414,7 +414,7 @@
 }
 #endif
 
-inline void DrawLines(Bitmap *bitmap, struct XY *points, int num_points,
+void DrawLines(Bitmap *bitmap, struct XY *points, int num_points,
 		      Pixel pixel)
 {
 #if !defined(TARGET_X11_NATIVE)
@@ -438,7 +438,7 @@
 #endif
 }
 
-inline Pixel GetPixel(Bitmap *bitmap, int x, int y)
+Pixel GetPixel(Bitmap *bitmap, int x, int y)
 {
 #if defined(TARGET_SDL)
   return SDLGetPixel(bitmap, x, y);
@@ -458,7 +458,7 @@
 #endif
 }
 
-inline Pixel GetPixelFromRGB(Bitmap *bitmap, unsigned int color_r,
+Pixel GetPixelFromRGB(Bitmap *bitmap, unsigned int color_r,
 			     unsigned int color_g, unsigned int color_b)
 {
   Pixel pixel;
@@ -481,7 +481,7 @@
   return pixel;
 }
 
-inline Pixel GetPixelFromRGBcompact(Bitmap *bitmap, unsigned int color)
+Pixel GetPixelFromRGBcompact(Bitmap *bitmap, unsigned int color)
 {
   unsigned int color_r = (color >> 16) & 0xff;
   unsigned int color_g = (color >>  8) & 0xff;
@@ -491,7 +491,7 @@
 }
 
 /* execute all pending screen drawing operations */
-inline void FlushDisplay(void)
+void FlushDisplay(void)
 {
 #ifndef TARGET_SDL
   XFlush(display);
@@ -499,14 +499,14 @@
 }
 
 /* execute and wait for all pending screen drawing operations */
-inline void SyncDisplay(void)
+void SyncDisplay(void)
 {
 #ifndef TARGET_SDL
   XSync(display, FALSE);
 #endif
 }
 
-inline void KeyboardAutoRepeatOn(void)
+void KeyboardAutoRepeatOn(void)
 {
 #ifdef TARGET_SDL
   SDL_EnableKeyRepeat(SDL_DEFAULT_REPEAT_DELAY / 2,
@@ -518,7 +518,7 @@
 #endif
 }
 
-inline void KeyboardAutoRepeatOff(void)
+void KeyboardAutoRepeatOff(void)
 {
 #ifdef TARGET_SDL
   SDL_EnableKeyRepeat(0, SDL_DEFAULT_REPEAT_INTERVAL);
@@ -529,7 +529,7 @@
 #endif
 }
 
-inline boolean PointerInWindow(DrawWindow *window)
+boolean PointerInWindow(DrawWindow *window)
 {
 #ifdef TARGET_SDL
   return TRUE;
@@ -546,7 +546,7 @@
 #endif
 }
 
-inline boolean SetVideoMode(boolean fullscreen)
+boolean SetVideoMode(boolean fullscreen)
 {
 #ifdef TARGET_SDL
   return SDLSetVideoMode(&backbuffer, fullscreen);
@@ -567,7 +567,7 @@
 #endif
 }
 
-inline boolean ChangeVideoModeIfNeeded(boolean fullscreen)
+boolean ChangeVideoModeIfNeeded(boolean fullscreen)
 {
 #ifdef TARGET_SDL
   if ((fullscreen && !video.fullscreen_enabled && video.fullscreen_available)||
@@ -600,7 +600,7 @@
 /* audio functions                                                           */
 /* ========================================================================= */
 
-inline void OpenAudio(void)
+void OpenAudio(void)
 {
   /* always start with reliable default values */
   audio.sound_available = FALSE;
@@ -627,7 +627,7 @@
 #endif
 }
 
-inline void CloseAudio(void)
+void CloseAudio(void)
 {
 #if defined(TARGET_SDL)
   SDLCloseAudio();
@@ -640,7 +640,7 @@
   audio.sound_enabled = FALSE;
 }
 
-inline void SetAudioMode(boolean enabled)
+void SetAudioMode(boolean enabled)
 {
   if (!audio.sound_available)
     return;
@@ -653,7 +653,7 @@
 /* event functions                                                           */
 /* ========================================================================= */
 
-inline void InitEventFilter(EventFilter filter_function)
+void InitEventFilter(EventFilter filter_function)
 {
 #ifdef TARGET_SDL
   /* set event filter to filter out certain events */
@@ -661,7 +661,7 @@
 #endif
 }
 
-inline boolean PendingEvent(void)
+boolean PendingEvent(void)
 {
 #ifdef TARGET_SDL
   return (SDL_PollEvent(NULL) ? TRUE : FALSE);
@@ -670,7 +670,7 @@
 #endif
 }
 
-inline void NextEvent(Event *event)
+void NextEvent(Event *event)
 {
 #ifdef TARGET_SDL
   SDLNextEvent(event);
@@ -679,7 +679,7 @@
 #endif
 }
 
-inline Key GetEventKey(KeyEvent *event, boolean with_modifiers)
+Key GetEventKey(KeyEvent *event, boolean with_modifiers)
 {
 #ifdef TARGET_SDL
 #if 0
@@ -707,7 +707,7 @@
 #endif
 }
 
-inline boolean CheckCloseWindowEvent(ClientMessageEvent *event)
+boolean CheckCloseWindowEvent(ClientMessageEvent *event)
 {
   if (event->type != EVENT_CLIENTMESSAGE)
     return FALSE;
@@ -724,7 +724,7 @@
 }
 
 
-inline void dummy(void)
+void dummy(void)
 {
 #ifdef TARGET_SDL
 #else
--- mirrormagic-2.0.2.orig/src/libgame/system.h
+++ mirrormagic-2.0.2/src/libgame/system.h
@@ -278,41 +278,41 @@
 void InitGfxDoor2Info(int, int, int, int);
 void InitGfxScrollbufferInfo(int, int);
 
-inline void InitVideoDisplay(void);
-inline void CloseVideoDisplay(void);
-inline void InitVideoBuffer(DrawBuffer **,DrawWindow **, int,int,int, boolean);
-inline Bitmap *CreateBitmapStruct(void);
-inline Bitmap *CreateBitmap(int, int, int);
-inline void FreeBitmap(Bitmap *);
-inline void BlitBitmap(Bitmap *, Bitmap *, int, int, int, int, int, int);
-inline void ClearRectangle(Bitmap *, int, int, int, int);
-inline void SetClipMask(Bitmap *, GC, Pixmap);
-inline void SetClipOrigin(Bitmap *, GC, int, int);
-inline void BlitBitmapMasked(Bitmap *, Bitmap *, int, int, int, int, int, int);
-inline void DrawSimpleWhiteLine(Bitmap *, int, int, int, int);
-inline void DrawLines(Bitmap *, struct XY *, int, Pixel);
-inline Pixel GetPixel(Bitmap *, int, int);
-inline Pixel GetPixelFromRGB(Bitmap *, unsigned int,unsigned int,unsigned int);
-inline Pixel GetPixelFromRGBcompact(Bitmap *, unsigned int);
-
-inline void FlushDisplay(void);
-inline void SyncDisplay(void);
-inline void KeyboardAutoRepeatOn(void);
-inline void KeyboardAutoRepeatOff(void);
-inline boolean PointerInWindow(DrawWindow *);
-inline boolean SetVideoMode(boolean);
-inline boolean ChangeVideoModeIfNeeded(boolean);
+extern inline void InitVideoDisplay(void);
+extern inline void CloseVideoDisplay(void);
+extern inline void InitVideoBuffer(DrawBuffer **,DrawWindow **, int,int,int, boolean);
+extern inline Bitmap *CreateBitmapStruct(void);
+extern inline Bitmap *CreateBitmap(int, int, int);
+extern inline void FreeBitmap(Bitmap *);
+extern inline void BlitBitmap(Bitmap *, Bitmap *, int, int, int, int, int, int);
+extern inline void ClearRectangle(Bitmap *, int, int, int, int);
+extern inline void SetClipMask(Bitmap *, GC, Pixmap);
+extern inline void SetClipOrigin(Bitmap *, GC, int, int);
+extern inline void BlitBitmapMasked(Bitmap *, Bitmap *, int, int, int, int, int, int);
+extern inline void DrawSimpleWhiteLine(Bitmap *, int, int, int, int);
+extern inline void DrawLines(Bitmap *, struct XY *, int, Pixel);
+extern inline Pixel GetPixel(Bitmap *, int, int);
+extern inline Pixel GetPixelFromRGB(Bitmap *, unsigned int,unsigned int,unsigned int);
+extern inline Pixel GetPixelFromRGBcompact(Bitmap *, unsigned int);
+
+extern inline void FlushDisplay(void);
+extern inline void SyncDisplay(void);
+extern inline void KeyboardAutoRepeatOn(void);
+extern inline void KeyboardAutoRepeatOff(void);
+extern inline boolean PointerInWindow(DrawWindow *);
+extern inline boolean SetVideoMode(boolean);
+extern inline boolean ChangeVideoModeIfNeeded(boolean);
 
 Bitmap *LoadImage(char *);
 
-inline void OpenAudio(void);
-inline void CloseAudio(void);
-inline void SetAudioMode(boolean);
-
-inline void InitEventFilter(EventFilter);
-inline boolean PendingEvent(void);
-inline void NextEvent(Event *event);
-inline Key GetEventKey(KeyEvent *, boolean);
-inline boolean CheckCloseWindowEvent(ClientMessageEvent *);
+extern inline void OpenAudio(void);
+extern inline void CloseAudio(void);
+extern inline void SetAudioMode(boolean);
+
+extern inline void InitEventFilter(EventFilter);
+extern inline boolean PendingEvent(void);
+extern inline void NextEvent(Event *event);
+extern inline Key GetEventKey(KeyEvent *, boolean);
+extern inline boolean CheckCloseWindowEvent(ClientMessageEvent *);
 
 #endif /* SYSTEM_H */
--- mirrormagic-2.0.2.orig/src/libgame/x11.c
+++ mirrormagic-2.0.2/src/libgame/x11.c
@@ -21,7 +21,7 @@
 static void X11InitDisplay();
 static DrawWindow *X11InitWindow();
 
-inline void X11InitVideoDisplay(void)
+void X11InitVideoDisplay(void)
 {
   /* initialize X11 video */
   X11InitDisplay();
@@ -30,7 +30,7 @@
   video.default_depth = XDefaultDepth(display, screen);
 }
 
-inline void X11InitVideoBuffer(DrawBuffer **backbuffer, DrawWindow **window)
+void X11InitVideoBuffer(DrawBuffer **backbuffer, DrawWindow **window)
 {
   *window = X11InitWindow();
 
--- mirrormagic-2.0.2.orig/src/libgame/x11.h
+++ mirrormagic-2.0.2/src/libgame/x11.h
@@ -286,8 +286,8 @@
 
 /* X11 function definitions */
 
-inline void X11InitVideoDisplay(void);
-inline void X11InitVideoBuffer(DrawBuffer **, DrawWindow **);
+extern inline void X11InitVideoDisplay(void);
+extern inline void X11InitVideoBuffer(DrawBuffer **, DrawWindow **);
 Bitmap *X11LoadImage(char *);
 
 #endif /* X11_H */