[Linux] -- compile a simple makefile in Linux

Today, I learned how to write makefile in C language programming in Linux. This is just a simple example:

Assume that the following file is in the practice Directory: Main. c hello1.c hello2.c hello1.h hello2.h several program files, to compile and connect them, the best way is to write a MAKEFILE file and run it with the make command. Make is a command tool that explains commands in makefile. Once the MAKEFILE file is written, you only need a make command to automatically compile the entire project, greatly improving the efficiency of software development. The MAKEFILE file in this example is as follows:

Main: Main. O hello1.o hello2.o

Gcc-O main. O hello1.o hello2.o (there is a tab key in front)

Main.0: Main. c hello1.h hello2.h

Gcc-C main. c

Hello1.o: hello1.c hello1.h

Gcc-C hello1.c

Hello2.o: hello2.c hello2.h

Gcc-C hello2.c

Clean:

Rm main. O hello1.o hello2.o

At this time, you only need a make command to generate the final result: the executable file main

Note:

1. to regenerate the target code, run the "make clean" command.

2. A more robust clean statement is as follows:

. Phony: clean

Clean:

-Rm main. O hello1.o hello2.o

3. Several target files can also be written as variables, namely:

At the beginning of the MAKEFILE file, write: Objects = main. O hello1.o hello2.c. You can use "$ (objects) to replace it elsewhere!