Reading Notes 4 open your hands and feet to write makefile files

Reading Notes 4 open your hands and feet to write the makefile file-general Linux technology-Linux programming and kernel information. The following is a detailed description. I spent about a week studying and writing makefile files, learning and writing from the beginning. Although most of them ended with failures, at the end, but after a successful start, most of them end with success. I think you only need to remember the following to learn makefile files.
First, understand the relationship between each file. That is, the primary-secondary relationship between the main program and a function, that is, the so-called dependency in the book. To put it bluntly, you must understand the causes and consequences between the programs.
Second, let the obscure rules go to hell.
Third, the command line in the Makefile file must start with the Tab key.
Fourth, try to add the shell command to the Makefile file. Remember that the shell command is usually placed behind the Makefile.
Fifth, from ease to difficulty, in fact, writing the makefile file does not have to write several program source code programs to use the Makefile file. In fact, only one source code program can also be compiled using the Makefile file.