set up unified lisp library and extensions subsystem.

common/Makefile

@@ -0,0 +1,33 @@
+LISPS :=	$(wildcard *.lsp)
+SOURCE :=	extensions.ino
+OUTPUT :=	LispLibrary.h
+TARGET :=	genlib
+PLATFORMS :=	picocalc tdeck teensy
+TARGETS_LIB :=	$(addprefix ../,$(addsuffix /$(OUTPUT),$(PLATFORMS)))
+TARGETS_EXT :=	$(addprefix ../,$(addsuffix /$(SOURCE),$(PLATFORMS)))
+
+CFLAGS += 	-Wall -Wextra -pedantic -Wshadow -Werror -std=c99 -g
+
+
+.PHONY: all
+all: $(TARGET)
+
+.PHONY: all
+install: $(TARGETS_LIB) $(TARGETS_EXT)
+
+.PHONY: clean
+clean:
+	rm $(OUTPUT) $(TARGET)
+
+$(TARGET): $(LISPS) $(SOURCE) $(TARGET).c Makefile
+	$(CC) $(CFLAGS) -o $(TARGET) $(TARGET).c
+
+$(OUTPUT): $(TARGET) $(LISPS) $(SOURCE) Makefile
+
+$(TARGETS_LIB): $(OUTPUT)
+	cp $(OUTPUT) $@
+
+$(TARGETS_EXT): $(SOURCE)
+	cp $(SOURCE) $@
+
+print-%: ; @echo '$(subst ','\'',$*=$($*))'