Improve Makefile.

src/Makefile

@@ -1,20 +1,22 @@
 CC = clang
-# FLAGS = -fno-objc-arc -Wall -Wextra -Wunguarded-availability \
-# 		-Werror=unguarded-availability -glldb -fno-caret-diagnostics \
-# 		-fno-show-column
-FLAGS = -O3
+FLAGS = -fno-objc-arc -Wall -Wextra -Wunguarded-availability \
+		-Werror=unguarded-availability -glldb -fno-caret-diagnostics \
+		-fno-show-column
+# FLAGS = -O3
 FRAMEWORKS = -framework Cocoa -framework IOKit -framework ServiceManagement
 MACOS_VERSION = 13.0
 EXEC = Caffeine
 
+TARGET = arm64-apple-macos$(MACOS_VERSION)
+# TARGET = x86_64-apple-macos$(MACOS_VERSION)
+
 default: $(EXEC) $(EXEC).app
 
-# TODO: Add x86 support.
-# -mmacosx-version-min=$(MACOS_VERSION)
-$(EXEC): main.m AppDelegate.m AboutViewController.m MenulessWindow.m \
-		 Helpers.m
-	$(CC) $(FLAGS) -target arm64-apple-macos$(MACOS_VERSION) \
-		-sectcreate __TEXT __info_plist Info.plist $^ $(FRAMEWORKS) -o $@
+$(EXEC): main.m AppDelegate.m AppDelegate.h\
+	     AboutViewController.m AboutViewController.h\
+		 MenulessWindow.m MenulessWindow.h Helpers.m Helpers.h
+	$(CC) $(FLAGS) -target $(TARGET) -sectcreate __TEXT __info_plist\
+		Info.plist $(filter-out %.h, $^) $(FRAMEWORKS) -o $@
 
 $(EXEC).app: $(EXEC)
 	@rm -rf $@