A lot better makefile

Makefile

@@ -3,20 +3,23 @@
 # File-version: 4
 
 INPUTS = $(wildcard *.sol)
+OUTPUTS = $(patsubst %.sol, %.json, $(INPUTS))
 PREFIX = /usr/local/share/cic/solidity/abi
 
-%.abi.json: $(wildcard *.sol)
-	install -vDm0644 $@ $(PREFIX)/$@
+#%.abi.json: $(wildcard *.sol)
+#	install -vDm0644 $@ $(PREFIX)/$@
 
-%.sol:
-	solc $@ --abi | awk 'NR>3' > $(basename $@).abi.json
+.SUFFIXES: .sol .json
 
-# TODO: improve, does not detect changes in sol files (I suck at writing makefiles)
-all: $(INPUTS)
+.sol.json:
+	solc $@ --abi | awk 'NR>3' > $(basename $@).json
 
-install: $(wildcard *.abi.json)
+all: $(OUTPUTS)
+
+install: $(OUTPUTS)
+	install -vDm0644 -t $(PREFIX) $?
 
 clean:
-	rm -vf *.abi.json
+	rm -vf *.json
 
 .PHONY: clean install