Remove core.h, SDL2->SDL3, Makefile cleanup, ansi C, 80 char.

Makefile

@@ -1,66 +1,80 @@
-ifeq ($(OS),Windows_NT)
-    DETECTED_OS := windows
-else
-    UNAME_S := $(shell uname -s)
+UNAME_M := $(shell uname -m)
 
-    ifeq ($(UNAME_S),Darwin)
-        DETECTED_OS := macos
-    else ifeq ($(UNAME_S),Linux)
-        DETECTED_OS := linux
-    else
-        DETECTED_OS := unknown
-	endif
+ifeq ($(UNAME_M),x86_64)
+	ARCH := ARCHITECTURE_X64
+else ifneq ($(filter $(UNAME_M),i686,i386),)
+	ARCH := ARCHITECTURE_X86
+else ifneq ($(filter $(UNAME_M),aarch64 arm64),)
+	ARCH := ARCHITECTURE_ARM64
+else ifneq ($(filter $(UNAME_M),armv7l armv6l),)
+	ARCH := ARCHITECTURE_ARM32
+endif
+
+UNAME_S := $(shell uname -s)
+
+ifeq ($(UNAME_S),Darwin)
+	OS := OS_MACOS
+else ifeq ($(UNAME_S),Linux)
+	OS := OS_LINUX
 endif
 
 CC = clang
 
-UFLAGS = 
-FLAGS = -ansi -pedantic -pedantic-errors -Wno-long-long -Wall -Wextra \
-		-Wincompatible-pointer-types \
-		-Wint-conversion -Wimplicit-int-float-conversion -Wformat \
-		-Wno-strict-prototypes -Wno-missing-field-initializers \
-		-Wno-unused-function -Wno-unused-parameter -Wno-unused-variable \
-		-Wno-unused-but-set-variable \
-		-fno-caret-diagnostics -fno-show-column
+ifeq ($(CC),clang)
+	COMP := COMPILER_CLANG
+else ifeq ($(CC),gcc)
+	COMP := COMPILER_GCC
+endif
 
-ifeq ($(DETECTED_OS),macos)
-	UFLAGS = -glldb
-	INCLUDE = -I./sdl/include/
-	LIBS = ./sdl/lib/arm-macos/libSDL2.a -lm
+# -ansi -pedantic -pedantic-errors
+CFLAGS = -Wno-long-long -Wall -Wextra \
+		 -Wincompatible-pointer-types \
+		 -Wint-conversion -Wimplicit-int-float-conversion -Wformat \
+		 -Wno-strict-prototypes -Wno-missing-field-initializers \
+		 -Wno-unused-function -Wno-unused-parameter -Wno-unused-variable \
+		 -Wno-unused-but-set-variable \
+		 -fno-caret-diagnostics -fno-show-column
+
+ifeq ($(OS),OS_MACOS)
+	FLAGS = -glldb
+	INCLUDE = -I./libs/include/
+	LIBS = ./libs/lib/arm-macos/libSDL3.a -lm
 	FRAMEWORKS = -framework Cocoa -framework IOKit -framework CoreAudio \
 				 -framework AudioToolbox -framework ForceFeedback \
 				 -framework Carbon -framework GameController \
 				 -framework Metal -framework QuartzCore \
 				 -framework CoreHaptics
-else ifeq ($(DETECTED_OS),linux)
-	UFLAGS = -ggdb -D_POSIX_C_SOURCE=200809L
-	INCLUDE = -I./sdl/include/
-	LIBS = ./sdl/lib/x86_64-linux/libSDL2.a -lm -lX11
-	FRAMEWORKS =
-else
-	INCLUDE =
-	LIBS =
+else ifeq ($(OS),OS_LINUX)
+	FLAGS = -ggdb -D_POSIX_C_SOURCE=200809L -no-pie
+	INCLUDE = -I./libs/include/
+	LIBS = ./libs/lib/x86_64-linux/libSDL3.a -lm -lX11
 	FRAMEWORKS =
 endif
 
 EXE=handmadehero
 
-default: tags libhandmade $(EXE)
+default: libhandmade $(EXE)
 
 libhandmade: handmade.c
-	@ $(CC) $(FLAGS) $(UFLAGS) -fPIC -shared $(INCLUDE) $^ $(LIBS) \
+	$(CC) $(CFLAGS) $(FLAGS) \
+		-D$(ARCH)=1 -D$(OS)=1 -D$(COMP)=1 \
+ 		-fPIC -shared $(INCLUDE) $^ $(LIBS) \
 		$(FRAMEWORKS) -o libhandmade.so
 
 $(EXE): sdl_handmade.c libhandmade
-	@ $(CC) $(FLAGS) $(UFLAGS) $(INCLUDE) sdl_handmade.c $(LIBS) \
-		$(FRAMEWORKS) -o $@ $(ifneq $(filter $(DETECTED_OS), macos linux), \
+	$(CC) $(CFLAGS) $(FLAGS) \
+		-D$(ARCH)=1 -D$(OS)=1 -D$(COMP)=1 \
+		$(INCLUDE) $< $(LIBS) \
+		$(FRAMEWORKS) -o $@ $(ifneq $(filter $(OS), OS_MACOS OS_LINUX), \
 		/link /FORCE:MULTIPLE)
 
+watch:
+	@ while true; do \
+		inotifywait -q -q -e 'modify' . && clear && make -B; \
+	done
+
 run:
 	@ ./$(EXE)
 
-tags: $(OBJS)
-	@ ctags -R *.h *.c
-
 clean:
-	@rm -rf $(EXE) $(EXE).dSYM libhandmade.so libhandmade.so.dSYM tags
+	@ rm -rf $(EXE) $(EXE).dSYM libhandmade.so libhandmade.so.dSYM