[client] allow building with -Wstrict-prototypes

This is not yet turned on because cimgui does not build with it enabled.

client/audiodevs/PulseAudio/pulseaudio.c

@@ -187,7 +187,7 @@ err:
   return false;
 }
 
-static void pulseaudio_sink_close_nl()
+static void pulseaudio_sink_close_nl(void)
 {
   if (!pa.sink)
     return;

client/displayservers/X11/clipboard.h

@@ -28,7 +28,7 @@
 
 bool x11CBEventThread(const XEvent xe);
 
-bool x11CBInit();
+bool x11CBInit(void);
 void x11CBNotice(LG_ClipboardData type);
 void x11CBRelease(void);
 void x11CBRequest(LG_ClipboardData type);

client/include/interface/displayserver.h

@@ -123,13 +123,13 @@ struct LG_DisplayServerOps
   bool (*init)(const LG_DSInitParams params);
 
   /* called at startup after window creation, renderer and SPICE is ready */
-  void (*startup)();
+  void (*startup)(void);
 
   /* called just before final window destruction, before final free */
-  void (*shutdown)();
+  void (*shutdown)(void);
 
   /* final free */
-  void (*free)();
+  void (*free)(void);
 
   /*
    * return a system specific property, returns false if unsupported or failure
@@ -170,14 +170,14 @@ struct LG_DisplayServerOps
   /* dm specific cursor implementations */
   void (*guestPointerUpdated)(double x, double y, double localX, double localY);
   void (*setPointer)(LG_DSPointer pointer);
-  void (*grabKeyboard)();
-  void (*ungrabKeyboard)();
+  void (*grabKeyboard)(void);
+  void (*ungrabKeyboard)(void);
   /* (un)grabPointer is used to toggle cursor tracking/confine in normal mode */
-  void (*grabPointer)();
-  void (*ungrabPointer)();
+  void (*grabPointer)(void);
+  void (*ungrabPointer)(void);
   /* (un)capturePointer is used do toggle special cursor tracking in capture mode */
-  void (*capturePointer)();
-  void (*uncapturePointer)();
+  void (*capturePointer)(void);
+  void (*uncapturePointer)(void);
 
   /* exiting = true if the warp is to leave the window */
   void (*warpPointer)(int x, int y, bool exiting);
@@ -185,17 +185,17 @@ struct LG_DisplayServerOps
   /* called when the client needs to realign the pointer. This should simply
    * call the appropriate app_handleMouse* method for the platform with zero
    * deltas */
-  void (*realignPointer)();
+  void (*realignPointer)(void);
 
   /* returns true if the position specified is actually valid */
   bool (*isValidPointerPos)(int x, int y);
 
   /* called to disable/enable the screensaver */
-  void (*inhibitIdle)();
-  void (*uninhibitIdle)();
+  void (*inhibitIdle)(void);
+  void (*uninhibitIdle)(void);
 
   /* called to request activation */
-  void (*requestActivation)();
+  void (*requestActivation)(void);
 
   /* wait for the specified time without blocking UI processing/event loops */
   void (*wait)(unsigned int time);

client/src/config.c

@@ -46,7 +46,7 @@ static bool       optScancodeValidate(struct Option * opt, const char ** error);
 static char *     optScancodeToString(struct Option * opt);
 static bool       optRotateValidate  (struct Option * opt, const char ** error);
 
-static void doLicense();
+static void doLicense(void);
 
 static struct Option options[] =
 {

client/src/config.h

@@ -20,6 +20,6 @@
 
 #include <stdbool.h>
 
-void config_init();
+void config_init(void);
 bool config_load(int argc, char * argv[]);
-void config_free();
+void config_free(void);

client/src/main.c

@@ -981,7 +981,7 @@ static bool tryRenderer(const int index, const LG_RendererParams lgrParams,
   return true;
 }
 
-static void reportBadVersion()
+static void reportBadVersion(void)
 {
   DEBUG_BREAK();
   DEBUG_ERROR("The host application is not compatible with this client");

client/src/overlays.h

@@ -44,7 +44,7 @@ void overlayAlert_show(LG_MsgAlert type, const char * fmt, va_list args);
 
 GraphHandle overlayGraph_register(const char * name, RingBuffer buffer,
     float min, float max, GraphFormatFn formatFn);
-void overlayGraph_unregister();
+void overlayGraph_unregister(GraphHandle handle);
 void overlayGraph_iterate(void (*callback)(GraphHandle handle, const char * name,
     bool * enabled, void * udata), void * udata);
 void overlayGraph_invalidate(GraphHandle handle);