我正在尝试创建一个简单的makefile来编译我正在linux中开发的示例应用程序(只是为了学习一些东西)但是我遇到了一个奇怪的问题,我不知道它为什么会这样发生..
我有这个makefile:
# Easily adaptable makefile for Advanced Programming
# Compiler flags
CFLAGS=-Wall -W -g -Wmissing-prototypes
# Indentation flags
IFLAGS=-br -brs -npsl -ce -cli4
# Name of the executable
PROGRAM=ex2
# Prefix for the gengetopt file (if gengetopt is used)
PROGRAM_OPT=config
# Object files required to build the executable
PROGRAM_OBJS=debug.o ${PROGRAM_OPT}.o
# Clean and all are not files
.PHONY: clean all docs indent
all: ${PROGRAM}
# compile with debug
debugon: CFLAGS += -D SHOW_DEBUG -g
debugon: ${PROGRAM}
${PROGRAM}: ${PROGRAM_OBJS}
${CC} -o $@ ${PROGRAM_OBJS}
# Generates command line arguments code from gengetopt configuration file
${PROGRAM_OPT}.h: ${PROGRAM_OPT}.ggo
gengetopt < ${PROGRAM_OPT}.ggo --file-name=${PROGRAM_OPT}
# Dependencies
${PROGRAM_OPT}.o: ${PROGRAM_OPT}.c ${PROGRAM_OPT}.h
debug.o: debug.c debug.h
main.o: debug.h ${PROGRAM_OPT}.h
#how to create an object file (.o) from C file (.c)
.c.o:
${CC} ${CFLAGS} -c $<
clean:
rm -f *.o core.* *~ ${PROGRAM} *.bak ${PROGRAM_OPT}.h ${PROGRAM_OPT}.c
indent:
indent ${IFLAGS} *.c *.h
一旦我输入make,我会收到一个错误告诉我:
make: *** No rule to make target `config.c', needed by `config.o'. Stop.
我可能会遗漏一些东西,但如果我没有弄错的话,这条线明确存在于PROGRAM_OPT
下这是目录中的文件列表:
答案 0 :(得分:1)
这表示make
无法找到您的源文件config.c
。您有config.h
的规则,但我没有看到要config.c
的人。
答案 1 :(得分:0)
我很确定不应该引用$ {PROGRAM_OPT} .c。