build: fail the Android build upon error and make it idempotent.

.gitignore

@@ -15,6 +15,8 @@
 .libs
 .deps
 .dirstamp
+.*.androiddir
+.*.androidstamp
 Makefile
 Makefile.in
 aclocal.m4

build/autotools/common.am

@@ -107,30 +107,35 @@ CLEANFILES += $(PROGRAMS:%$(EXEEXT)=%.exe) \
 
 all-local: all-local-android
 clean-local: clean-local-android
+
 if USE_ANDROID
-all-local-android: $(foreach p, $(PROGRAMS:%$(EXEEXT)=%), $($(p)_DATA))
-	$(foreach p, $(PROGRAMS:%$(EXEEXT)=%), \
-	    rm -rf "android-$(p)"; \
-	    $(MKDIR_P) "android-$(p)" $(sort $(foreach f, $($(p)_DATA), "android-$(p)/assets/$(dir $(f))")); \
-	    $(foreach f, $($(p)_DATA), $(LN_S) "$(abs_srcdir)/$(f)" "android-$(p)/assets/$(f)";) \
-	    $(SED) -e 's,@PROGRAM@,$(p),' "$(top_srcdir)/build/android/AndroidManifest.xml" > "android-$(p)/AndroidManifest.xml"; \
-	    $(MKDIR_P) "android-$(p)/src/net/lolengine"; \
-	    $(SED) -e 's,@PROGRAM@,$(p),' "$(top_srcdir)/build/android/LolActivity.java" > "android-$(p)/src/net/lolengine/LolActivity.java"; \
-	    $(MKDIR_P) "android-$(p)/res/values"; \
-	    $(SED) -e 's,@PROGRAM@,$(p),' "$(top_srcdir)/build/android/strings.xml" > "android-$(p)/res/values/strings.xml"; \
-	    $(MKDIR_P) "android-$(p)/res/drawable"; \
-	    cp "$(top_srcdir)/build/android/icon.png" "android-$(p)/res/drawable/"; \
-	    $(MKDIR_P) "android-$(p)/libs/armeabi"; \
-	    $(LN_S) "$(abs_builddir)/$(p).so" "android-$(p)/libs/armeabi/lib$(p).so"; \
-	    $(LN_S) "$${ANDROID_NDK_ROOT}/sources/cxx-stl/stlport/libs/armeabi/libstlport_shared.so" "android-$(p)/libs/armeabi"; \
-	    android update project -t android-8 -p "android-$(p)"; \
-	    ant debug -f "android-$(p)/build.xml"; \
-	)
+all-local-android: $(foreach p, $(PROGRAMS:%$(EXEEXT)=%), .$(p).androidstamp)
+.%.androidstamp: %$(EXEEXT)
+	$(eval p := $(^:%$(EXEEXT)=%))
+	$(eval d := .$(p).androiddir)
+	rm -rf "$(d)"
+	$(MKDIR_P) "$(d)" $(sort $(foreach f, $($(p)_DATA), "$(d)/assets/$(dir $(f))"))
+	$(foreach f, $($(p)_DATA), $(LN_S) "$(abs_srcdir)/$(f)" "$(d)/assets/$(f)" &&) true
+	$(SED) -e 's,@PROGRAM@,$(p),' "$(top_srcdir)/build/android/AndroidManifest.xml" > "$(d)/AndroidManifest.xml"
+	$(MKDIR_P) "$(d)/src/net/lolengine"
+	$(SED) -e 's,@PROGRAM@,$(p),' "$(top_srcdir)/build/android/LolActivity.java" > "$(d)/src/net/lolengine/LolActivity.java"
+	$(MKDIR_P) "$(d)/res/values"
+	$(SED) -e 's,@PROGRAM@,$(p),' "$(top_srcdir)/build/android/strings.xml" > "$(d)/res/values/strings.xml"
+	$(MKDIR_P) "$(d)/res/drawable"
+	cp "$(top_srcdir)/build/android/icon.png" "$(d)/res/drawable/"
+	$(MKDIR_P) "$(d)/libs/armeabi"
+	$(LN_S) "$(abs_builddir)/$(p)$(EXEEXT)" "$(d)/libs/armeabi/lib$(p).so"
+	$(LN_S) "$${ANDROID_NDK_ROOT}/sources/cxx-stl/stlport/libs/armeabi/libstlport_shared.so" "$(d)/libs/armeabi"
+	android update project -t android-8 -p "$(d)"
+	ant debug -f "$(d)/build.xml"
+	touch $@
 else
 all-local-android:
 endif
+
 clean-local-android:
-	$(foreach p, $(PROGRAMS:%$(EXEEXT)=%), rm -rf "android-$(p)";)
+	$(foreach p, $(PROGRAMS:%$(EXEEXT)=%), rm -rf ".$(p).androiddir";)
+	$(foreach p, $(PROGRAMS:%$(EXEEXT)=%), rm -f ".$(p).androidstamp";)
 
 
 #