Add prelude with UNUSED macro

src/engine/_prelude.h

@@ -0,0 +1,14 @@
+#ifndef ENGINE_PRELUDE_H_
+#define ENGINE_PRELUDE_H_
+
+#ifdef __GNUC__
+
+#	define UNUSED __attribute__((unused))
+
+#else // __GNUC__
+
+#	define UNUSED
+
+#endif // __GNUC__
+
+#endif // ENGINE_PRELUDE_H_

src/engine/engine.c

@@ -5,6 +5,7 @@
 #include <GL/glxew.h>
 #include <GLFW/glfw3.h>
 
+#include "_prelude.h"
 #include "input.h"
 #include "logger.h"
 #include "performance.h"
@@ -111,6 +112,6 @@ EngineConfig defaultConfig() {
 	                        .swapInterval = 1 };
 }
 
-static void onGlfwError(int error, const char* description) {
+static void onGlfwError(int error UNUSED, const char* description) {
 	logError("GLFW error: %s", description);
 }

src/engine/input.c

@@ -2,13 +2,14 @@
 
 #include <stdbool.h>
 
+#include "_prelude.h"
 #include "render.h"
 
 static void (*keyboardInputCallback) (int, int, int, int);
 
 
 
-void onKeyboardEvent(GLFWwindow* window, int key, int scancode, int action, int mods) {
+void onKeyboardEvent(GLFWwindow* window UNUSED, int key, int scancode, int action, int mods) {
 	if (!(mods & GLFW_MOD_CONTROL)) {
 		if (keyboardInputCallback) {
 			keyboardInputCallback(key, scancode, action, mods);

src/engine/ui.c

@@ -1,8 +1,9 @@
 #include "ui.h"
 
+#include "_prelude.h"
 #include "render.h"
 
-void resizeStage(GLFWwindow* window, int width, int height) {
+void resizeStage(GLFWwindow* window UNUSED, int width, int height) {
 	if (height == 0)
 		height = 1;
 

src/game/input.c

@@ -2,9 +2,11 @@
 
 #include <GLFW/glfw3.h>
 
+#include "engine/_prelude.h"
+
 #include "player.h"
 
-void keyboardInput(int key, int scancode, int action, int mods) {
+void keyboardInput(int key, int scancode UNUSED, int action, int mods UNUSED) {
 	switch (key) {
 		case GLFW_KEY_W:
 			if (action == GLFW_PRESS) {