多文件下的Makefile编写之生成一到多个可执行文件

多文件下的Makefile编写：（会生成两个可执行文件）
   例如一个文件包含 customer.c   mylock.c    producer.c    mylock.h
编写Makefile文件如下：

EXEC1 = producer
EXEC2 = customer
OBJS1 = producer.o mylock.o
OBJS2 = customer.o mylock.o
HEADERS = mylock.h

CC = gcc
CFLAGS = -O2 -g

all:${EXEC1} ${EXEC2}
${EXEC1} : ${OBJS1}
    ${CC} ${CFLAGS} ${LDFLAGS} -o $@ ${OBJS1}
${EXEC2} : ${OBJS2}
    ${CC} ${CFLAGS} ${LDFLAGS} -o $@ ${OBJS2}

${OBJS1} : ${HEADERS}
${OBJS2} : ${HEADERS}

.PHONY : clean
clean :
    -rm -f ${OBJS1} ${EXEC1}
    -rm -f ${OBJS2} ${EXEC2}
    cat /dev/null > myfifo
    cat /dev/null > myfifo

【*】例如一个文件包含：com_target.c  uart_api.c  uart_api.h
多文件下的Makefile编写：（会生成一个可执行文件）

EXEC = com_target
OBJS = com_target.o uart_api.o
HEADERS = uart_api.h

HOST_CC = gcc
TARGET_CC = arm-linux-gcc
CC = ${TARGET_CC}

INC = -I.
CFLAGS = ${INC} -g

all:${EXEC}
${EXEC} : ${OBJS}
    ${CC} ${CFLAGS} ${LDFLAGS} -o $@ ${OBJS}
${OBJS2} : ${HEADERS}

.PHONY : clean
clean :
    rm -f ${OBJS} ${EXEC}