replace UNUSED with standard stuff

src/engine/command.cc

@@ -211,7 +211,7 @@ static bool initidents()
     }
     return true;
 }
-UNUSED static bool forceinitidents = initidents();
+[[maybe_unused]] static bool forceinitidents = initidents();
 
 static const char *sourcefile = nullptr, *sourcestr = nullptr;
 

src/engine/rendermodel.cc

@@ -47,7 +47,7 @@ static model *__loadmodel__##modelclass(const char *filename) \
 { \
     return new modelclass(filename); \
 } \
-UNUSED static int __dummy__##modelclass = addmodeltype((modeltype), __loadmodel__##modelclass);
+[[maybe_unused]] static int __dummy__##modelclass = addmodeltype((modeltype), __loadmodel__##modelclass);
 
 static void loadskin(const char *dir, const char *altdir, Texture *&skin, Texture *&masks);
 

src/sauerlib/tools.hh

@@ -20,12 +20,6 @@
 #define RESTRICT
 #endif
 
-#ifdef __GNUC__
-#define UNUSED __attribute__((unused))
-#else
-#define UNUSED
-#endif
-
 #ifdef swap
 #undef swap
 #endif

src/shared/command.hh

@@ -315,8 +315,8 @@ inline void ident::getcval(tagval &v) const
 }
 
 // nasty macros for registering script functions, abuses globals to avoid excessive infrastructure
-#define KEYWORD(name, type) UNUSED static bool __dummy_##type = addcommand(#name, (identfun)nullptr, nullptr, type)
-#define COMMANDKN(name, type, fun, nargs) UNUSED static bool __dummy_##fun = addcommand(#name, (identfun)fun, nargs, type)
+#define KEYWORD(name, type) [[maybe_unused]] static bool __dummy_##type = addcommand(#name, (identfun)nullptr, nullptr, type)
+#define COMMANDKN(name, type, fun, nargs) [[maybe_unused]] static bool __dummy_##fun = addcommand(#name, (identfun)fun, nargs, type)
 #define COMMANDK(name, type, nargs) COMMANDKN(name, type, name, nargs)
 #define COMMANDN(name, fun, nargs) COMMANDKN(name, ID_COMMAND, fun, nargs)
 #define COMMAND(name, nargs) COMMANDN(name, name, nargs)