cmd_asn1_compiler = $(objtree)/scripts/asn1_compiler $< \
$(subst .h,.c,$@) $(subst .c,.h,$@)
-.PRECIOUS: $(objtree)/$(obj)/%-asn1.c $(objtree)/$(obj)/%-asn1.h
-
$(obj)/%-asn1.c $(obj)/%-asn1.h: $(src)/%.asn1 $(objtree)/scripts/asn1_compiler
$(call cmd,asn1_compiler)