What is include in makefile?
The include directive tells make to suspend reading the current makefile and read one or more other makefiles before continuing. The directive is a line in the makefile that looks like this: include filenames … filenames can contain shell file name patterns.
How do I include a .h file in makefile?
The only way to include the header file is to treat the filename in the same way you treat a string. Makefiles are a UNIX thing, not a programming language thing Makefiles contain UNIX commands and will run them in a specified sequence.
How do you add a path to a makefile?
In order to add a directory to its search paths, you use the -I*dir* option, where dir is the relative directory path from where you run the compile command. If you are using a Makefile, the path will be relative to where your Makefile is.
How do you use variables in makefile?
How to Use Variables
- A variable is a name defined in a makefile to represent a string of text, called the variable’s value.
- To substitute a variable’s value, write a dollar sign followed by the name of the variable in parentheses or braces: either `$(foo)’ or `${foo}’ is a valid reference to the variable foo .
What is .O file C++?
A .o object file file (also . obj on Windows) contains compiled object code (that is, machine code produced by your C or C++ compiler), together with the names of the functions and other objects the file contains. Object files are processed by the linker to produce the final executable.
How do I read a .S file?
If you find an S file and do not know what programming language it contains, you can open it using a variety of text and source code editors. Some programs that can open and edit S files include Microsoft Notepad, gVim, MacroMates TextMate, Bare Bones BBEdit, and Vi.
What are the three essential elements of a makefile?
There are three main elements of a Makefile:
- Targets: This is the goal of a compilation process, such as an executable or object file.
- Dependencies: Files which the target depends on, such as the source files.
- Commands: What should be run to actually compile a file to produce a target.
What are targets in makefile?
A simple makefile consists of “rules” with the following shape: target … : prerequisites … recipe … … A target is usually the name of a file that is generated by a program; examples of targets are executable or object files. A target can also be the name of an action to carry out, such as ‘ clean ‘ (see Phony Targets).