如何创建Makefile正确编译我的C代码？

Question

The problem is that my webserver works fine when I compile my code in terminal using gcc directly:

gcc webserver.c ../include/webserverinit.c ../include/webserver_request_response.c -o webserver

but after using Makefile the code doesn't work fine. I don't get any error but one of the functions doesn't work correctly

I don't understand what is happening here. I know my code is ok and to make sure the Makefile is working fine, I used some Makefile generator as well but it is still the same.

I know my code is ok and to make sure the Makefile is working fine I used some Makefile generator as well but it is still the same

Makefile that I'm using:

CC=gcc
WEBSERVER_OBJECT=./objects/webserver.o
WEBSERVER_SOURCE=./src/webserver.c
WEBSERVERINIT_OBJECT=./objects/webserverinit.o #Library to start the webserver and listening on the port
WEBSERVERINIT_SOURCE=./include/webserverinit.c
WEBSERVERINIT_HEADER=./include/webserverinit.h
WEBSERVER_REQUEST_RESPONSE_OBJECT=./objects/webserver_request_response.o #Library for receiving requests and sending respons
WEBSERVER_REQUEST_RESPONSE_SOURCE=./include/webserver_request_response.c
WEBSERVER_REQUEST_RESPONSE_HEADER=./include/webserver_request_response.h
OBJECTS=./objects/webserver.o ./objects/webserverinit.o ./objects/webserver_request_response.o #objects folder
HEADERS=./include/webserverinit.h ./include/webserver_request_response.h #headers
OBJECTDIR=./objects

webserver: ${OBJECTS}
    ${CC} ${OBJECTS} -o webserver

${WEBSERVER_OBJECT}: ${WEBSERVER_SOURCE} ${HEADERS}
    ${CC} -c  ${WEBSERVER_SOURCE} -o ${WEBSERVER_OBJECT}

${WEBSERVERINIT_OBJECT}: ${WEBSERVERINIT_SOURCE} ${WEBSERVERINIT_HEADER}
    ${CC} -c ${WEBSERVERINIT_SOURCE} -o ${WEBSERVERINIT_OBJECT}   

${WEBSERVER_REQUEST_RESPONSE_OBJECT}: ${WEBSERVER_REQUEST_RESPONSE_SOURCE} ${WEBSERVER_REQUEST_RESPONSE_HEADER}
    ${CC} -c ${WEBSERVER_REQUEST_RESPONSE_SOURCE} -o ${WEBSERVER_REQUEST_RESPONSE_OBJECT} 
clean:
    rm -rf ${OBJECTDIR}/*.o webserver

I want my code works with Makefile as well but it is not working with Makefile. What should I do?

Answer 1

How can I create a Makefile to compile my C code correctly?

You need a source code editor (eg emacs ) which knows the peculiarities of Makefile s in particular the weird role of tab characters in them.

CFLAGS=-c -o

That is probably wrong. You might want CFLAGS= -g -Wall instead. Hint: run make -p to understand the builtin rules of make and take advantage of them.

WEBSERVERINIT_SOURCE=./include/webserverinit.c

And that looks strange (I guess that you should replace include with src ).

---

First, you need to read documentation . In particular, about invoking GCC on the command line, and later read the GNU make documentation . Spend several hours to read each of them.

Then, you might want to use the -v and -H flags to gcc . Both are helpful.

At last, you should use remake : it is an improved variant of make (designed to ease debugging of your Makefile ). You'll use it with the -x flag.