makefile/Update eams target

makefile

@@ -2,6 +2,7 @@ TARGETS=cpp python nanopb eams
 
 all: ${TARGETS}
 
+project_dir = $(CURDIR)
 messages = $(wildcard messages/*.proto)
 
 .PHONY: ${TARGETS} clean
@@ -20,8 +21,7 @@ nanopb:
 
 eams:
 	mkdir -p eams
-	cd embeddedproto
-	protoc --plugin=protoc-gen-eams --eams_out=../eams --proto_path=../messages ../${messages}
+	cd /embeddedproto && protoc --plugin=protoc-gen-eams --eams_out=$(project_dir)/eams --proto_path=$(project_dir)/messages $(patsubst %, $(project_dir)/%, $(messages))
 
 clean:
 	rm -rf ${TARGETS}