Makefile: Use .SUFFIXES

Makefile

@@ -1,4 +1,5 @@
 .POSIX:
+.SUFFIXES: .apk .unsigned .aligned
 
 PROJECT = helloworld
 ANDROIDSDK = /usr/lib/android-sdk
@@ -15,7 +16,9 @@ R = helloworld/R.java
 # Resources:
 # https://www.hanshq.net/command-line-android.html
 
-$(PROJECT).apk: $(PROJECT).aligned.apk keystore.jks
+$(PROJECT).apk: keystore.jks
+
+.aligned.apk:
 	apksigner sign \
 		--ks keystore.jks \
 		--ks-key-alias androidkey \
@@ -34,10 +37,10 @@ keystore.jks:
 		-storepass android \
 		-keypass android
 
-$(PROJECT).aligned.apk: $(PROJECT).unsigned.apk
+.unsigned.aligned:
 	zipalign -f -p 4 $< $@
 
-$(PROJECT).unsigned.apk: dex/classes.dex $(MANIFEST)
+$(PROJECT).unsigned: dex/classes.dex $(MANIFEST)
 	aapt package -f -F $@ -I $(PLATFORM) -M $(MANIFEST) -S res dex
 
 dex/classes.dex: $(OBJECTS) $(MANIFEST)