LINUX Study Notes 8 -- Makefile project management

1. role: to compile the entire software project, the link can be completed with only one command. Gcc can only compile one file. 2. Makefile: describes the compilation and linking rules of the entire project. To execute the make Command 3. File name: by default, the make command looks for makefile or... 1. function: to compile the entire software project, the link can be completed with only one command. Gcc can only compile one file.
 
2. Makefile: describes the compilation and linking rules of the entire project. To execute the make command
 
3. File name: the make command searches for the makefile or Makefile project file by default,
 
A) specify the file name: make-f file name
 
4. rules:
 
A) 1st goals will be established as the final goal
 
B) multi-objective: the final target depends on multiple. o files gcc-c, while other. o files target. c files.
 
C) target: dependent on main. o: main. c
 
D) command gcc-c main. c: The Command must start with the TAB key.
 
5. pseudo targets:
 
A) define the pseudo target of "clean":. PHONY: clean
 
B) purpose: execute some other commands, such as deleting the rm-f hello. o file.
 
6. use variables: replace dependencies with variables to facilitate modification.
 
A) default variables:
 
1. $ ^: indicates all the dependent files in the rule.
 
2. $ @: indicates the target of the rule.
 
3. $ <: indicates the first dependency file in the rule.
 
7. Notes: # Start
 
8. cancel echo: + @: @ gcc before the command