Fix warnings: static, include, un-initialized vairables

src/video/kmsdrm/SDL_kmsdrmmouse.c

@@ -119,7 +119,7 @@ KMSDRM_CreateCursorBO (SDL_VideoDisplay *display) {
 } 
 
 /* Remove a cursor buffer from a display's DRM cursor BO. */
-int
+static int
 KMSDRM_RemoveCursorFromBO(SDL_VideoDisplay *display)
 {
     int ret = 0;
@@ -138,7 +138,7 @@ KMSDRM_RemoveCursorFromBO(SDL_VideoDisplay *display)
 }
 
 /* Dump a cursor buffer to a display's DRM cursor BO.  */
-int
+static int
 KMSDRM_DumpCursorToBO(SDL_VideoDisplay *display, SDL_Cursor *cursor)
 {
     SDL_DisplayData *dispdata = (SDL_DisplayData *) display->driverdata;
@@ -403,8 +403,6 @@ KMSDRM_WarpMouseGlobal(int x, int y)
     } else {
         return SDL_SetError("No mouse or current cursor.");
     }
-
-    return 0;
 }
 
 void

src/video/kmsdrm/SDL_kmsdrmmouse.h

@@ -48,7 +48,7 @@ extern void KMSDRM_QuitMouse(_THIS);
 
 extern void KMSDRM_CreateCursorBO(SDL_VideoDisplay *display);
 extern void KMSDRM_DestroyCursorBO(_THIS, SDL_VideoDisplay *display);
-extern void KMSDRM_InitCursor();
+extern void KMSDRM_InitCursor(void);
 
 #endif /* SDL_KMSDRM_mouse_h_ */
 

src/video/kmsdrm/SDL_kmsdrmvideo.c

@@ -471,7 +471,7 @@ KMSDRM_WaitPageflip(_THIS, SDL_WindowData *windata) {
    available on the DRM connector of the display.
    We use the SDL mode list (which we filled in KMSDRM_GetDisplayModes)
    because it's ordered, while the list on the connector is mostly random.*/
-drmModeModeInfo*
+static drmModeModeInfo*
 KMSDRM_GetClosestDisplayMode(SDL_VideoDisplay * display,
 uint32_t width, uint32_t height, uint32_t refresh_rate){
 
@@ -502,7 +502,8 @@ uint32_t width, uint32_t height, uint32_t refresh_rate){
 /*****************************************************************************/
 
 /* Deinitializes the driverdata of the SDL Displays in the SDL display list. */
-void KMSDRM_DeinitDisplays (_THIS) {
+static void
+KMSDRM_DeinitDisplays (_THIS) {
 
     SDL_DisplayData *dispdata;
     int num_displays, i;
@@ -531,7 +532,8 @@ void KMSDRM_DeinitDisplays (_THIS) {
 
 /* Gets a DRM connector, builds an SDL_Display with it, and adds it to the
    list of SDL Displays in _this->displays[]  */
-void KMSDRM_AddDisplay (_THIS, drmModeConnector *connector, drmModeRes *resources) {
+static void
+KMSDRM_AddDisplay (_THIS, drmModeConnector *connector, drmModeRes *resources) {
 
     SDL_VideoData *viddata = ((SDL_VideoData *)_this->driverdata);
     SDL_DisplayData *dispdata = NULL;
@@ -719,7 +721,8 @@ cleanup:
    closed when we get to the end of this function.
    This is to be called early, in VideoInit(), because it gets us
    the videomode information, which SDL needs immediately after VideoInit(). */
-int KMSDRM_InitDisplays (_THIS) {
+static int
+KMSDRM_InitDisplays (_THIS) {
 
     SDL_VideoData *viddata = ((SDL_VideoData *)_this->driverdata);
     drmModeRes *resources = NULL;
@@ -813,7 +816,7 @@ cleanup:
    These things are incompatible with Vulkan, which accesses the same resources
    internally so they must be free when trying to build a Vulkan surface.
 */
-int
+static int
 KMSDRM_GBMInit (_THIS, SDL_DisplayData *dispdata)
 {
     SDL_VideoData *viddata = (SDL_VideoData *)_this->driverdata;
@@ -837,7 +840,7 @@ KMSDRM_GBMInit (_THIS, SDL_DisplayData *dispdata)
 }
 
 /* Deinit the Vulkan-incompatible KMSDRM stuff. */
-void
+static void
 KMSDRM_GBMDeinit (_THIS, SDL_DisplayData *dispdata)
 {
     SDL_VideoData *viddata = ((SDL_VideoData *)_this->driverdata);
@@ -858,7 +861,7 @@ KMSDRM_GBMDeinit (_THIS, SDL_DisplayData *dispdata)
     viddata->gbm_init = SDL_FALSE;
 }
 
-void
+static void
 KMSDRM_DestroySurfaces(_THIS, SDL_Window *window)
 {
     SDL_VideoData *viddata = ((SDL_VideoData *)_this->driverdata);

src/video/kmsdrm/SDL_kmsdrmvulkan.c

@@ -182,7 +182,7 @@ SDL_bool KMSDRM_Vulkan_CreateSurface(_THIS,
                                   VkInstance instance,
                                   VkSurfaceKHR *surface)
 {
-    VkPhysicalDevice gpu;
+    VkPhysicalDevice gpu = NULL;
     uint32_t gpu_count;
     uint32_t display_count;
     uint32_t mode_count;

src/video/wayland/SDL_waylandclipboard.c

@@ -24,6 +24,7 @@
 
 #include "SDL_waylanddatamanager.h"
 #include "SDL_waylandevents_c.h"
+#include "SDL_waylandclipboard.h"
 
 int
 Wayland_SetClipboardText(_THIS, const char *text)

src/video/wayland/SDL_waylandmessagebox.c

@@ -31,6 +31,8 @@
 #include <string.h> /* strerr */
 #include <errno.h>
 
+#include "SDL_waylandmessagebox.h"
+
 #define MAX_BUTTONS             8       /* Maximum number of buttons supported */
 
 int
@@ -186,7 +188,6 @@ Wayland_ShowMessageBox(const SDL_MessageBoxData *messageboxdata, int *buttonid)
             return SDL_SetError("Waiting on zenity failed: %s", strerror(errno));
         }
     }
-    return 0;
 }
 
 #endif /* SDL_VIDEO_DRIVER_WAYLAND */

src/video/wayland/SDL_waylandmouse.c

@@ -38,7 +38,7 @@
 #include "SDL_waylandevents_c.h"
 
 #include "wayland-cursor.h"
-
+#include "SDL_waylandmouse.h"
 
 
 typedef struct {

src/video/x11/SDL_x11window.c

@@ -1693,7 +1693,7 @@ X11_SetWindowMouseGrab(_THIS, SDL_Window * window, SDL_bool grabbed)
         if (!data->videodata->broken_pointer_grab) {
             const unsigned int mask = ButtonPressMask | ButtonReleaseMask | PointerMotionMask | FocusChangeMask;
             int attempts;
-            int result;
+            int result = 0;
 
             /* Try for up to 5000ms (5s) to grab. If it still fails, stop trying. */
             for (attempts = 0; attempts < 100; attempts++) {