Imagine relying on C23 features

src/CMakeLists.txt

@@ -308,6 +308,7 @@ target_compile_options(SRB2SDL2 PRIVATE
 
 		$<$<VERSION_GREATER_EQUAL:$<C_COMPILER_VERSION>,9.1.0>:
 			-Wno-error=address-of-packed-member
+			-Wc11-c2x-compat
 		>
 	>
 

src/info.c

@@ -83,11 +83,11 @@ playersprite_t spr2defaults[NUMPLAYERSPRITES] = {
 };
 
 // Doesn't work with g++, needs actionf_p1 (don't modify this comment)
-state_t states[NUMSTATES] = {};
+state_t states[NUMSTATES] = {0};
 
-mobjinfo_t mobjinfo[NUMMOBJTYPES] = {};
+mobjinfo_t mobjinfo[NUMMOBJTYPES] = {0};
 
-skincolor_t skincolors[MAXSKINCOLORS] = {};
+skincolor_t skincolors[MAXSKINCOLORS] = {0};
 
 /** Patches the mobjinfo, state, and skincolor tables.
   * Free slots are emptied out and set to initial values.

src/lua_mobjlib.c

@@ -294,12 +294,14 @@ static int mobj_get(lua_State *L)
 		lua_pushinteger(L, mo->sprite);
 		break;
 	case mobj_frame:
+	{
 		UINT32 frame = mo->frame;
 		// translate SPR2 back to frames
 		if (lua_compatmode && mo->sprite == SPR_PLAY)
 			frame = (frame & ~FF_FRAMEMASK) | spr2frame(mo->sprite2, mo->frame);
 		lua_pushinteger(L, frame);
 		break;
+	}
 	case mobj_sprite2:
 		lua_pushinteger(L, mo->sprite2);
 		break;
@@ -369,17 +371,21 @@ static int mobj_get(lua_State *L)
 		lua_pushinteger(L, mo->flags);
 		break;
 	case mobj_flags2:
+	{
 		UINT32 flags2 = mo->flags2;
 		if (lua_compatmode && (mo->renderflags & RF_DONTDRAW) == RF_DONTDRAW)
 			flags2 |= MF2_DONTDRAW;
 		lua_pushinteger(L, flags2);
 		break;
+	}
 	case mobj_eflags:
-		UINT32 eflags = mo->eflags;
+	{
+		UINT32 eflags = mo->eflags; // yes, not UINT16
 		if (lua_compatmode)
 			eflags |= (~mo->renderflags & RF_DONTDRAW);
 		lua_pushinteger(L, eflags);
 		break;
+	}
 	case mobj_renderflags:
 		lua_pushinteger(L, mo->renderflags);
 		break;
@@ -677,11 +683,13 @@ static int mobj_set(lua_State *L)
 		mo->rollangle = luaL_checkangle(L, 3);
 		break;
 	case mobj_sprite:
+	{
 		spritenum_t newsprite = luaL_checkinteger(L, 3);
 		if (lua_compatmode && mo->sprite != SPR_PLAY && newsprite == SPR_PLAY)
 			frame2spr2(mo, mo->frame);
 		mo->sprite = newsprite;
 		break;
+	}
 	case mobj_frame:
 		// Check for SPR2
 		if (lua_compatmode && mo->sprite == SPR_PLAY)
@@ -795,6 +803,7 @@ static int mobj_set(lua_State *L)
 		break;
 	}
 	case mobj_flags2:
+	{
 		UINT32 flags2 = luaL_checkinteger(L, 3);
 		if (lua_compatmode)
 		{
@@ -805,12 +814,15 @@ static int mobj_set(lua_State *L)
 		}
 		mo->flags2 = flags2;
 		break;
+	}
 	case mobj_eflags:
+	{
 		UINT32 eflags = luaL_checkinteger(L, 3);
 		if (lua_compatmode)
 			mo->renderflags = (mo->renderflags & ~RF_DONTDRAW) | (~eflags & RF_DONTDRAW); // eeeyup.
 		mo->eflags = (UINT16)eflags;
 		break;
+	}
 	case mobj_renderflags:
 		mo->renderflags = (UINT32)luaL_checkinteger(L, 3);
 		break;

src/r_skins.c

@@ -473,7 +473,7 @@ static void R_LoadSkinSprites(UINT16 wadnum, UINT16 *lump, UINT16 *lastlump, ski
 		size_t i;
 		spritedef_t *sd;
 		spriteframe_t *sf;
-		spritedef_t tmp = {};
+		spritedef_t tmp = {0};
 		const char *sprname = W_CheckNameForNumPwad(wadnum, *lump);
 		R_AddSingleSpriteDef(sprname, &tmp, wadnum, *lump, *lastlump);
 
@@ -557,7 +557,7 @@ static void R_IHateThatHedgehog(UINT16 wadnum)
 	UINT16 lump = W_CheckNumForNamePwad("S_START", wadnum, 0);
 	if (lump == INT16_MAX)
 		I_Error("R_IHateThatHedgehog: could not find the hedgehog");
-	R_LoadSkinSprites(wadnum, &lump, &(UINT16){}, skin);
+	R_LoadSkinSprites(wadnum, &lump, &(UINT16){0}, skin);
 
 #ifdef SKINVALUES
 	skin_cons_t[0].value = 0;

src/sounds.c

@@ -53,6 +53,8 @@ sfxinfo_t S_sfx[NUMSFX] =
 
   // skin sounds free slots to add sounds at run time (Boris HACK!!!)
   // initialized to NULL
+
+  0
 };
 
 static char soundnames[NUMSFX][7] = {