How To Install iwyu on Debian 9
Introduction
In this tutorial we learn how to install iwyu on Debian 9.
What is iwyu
iwyu is:
“Include what you use” means this: for every symbol (type, function variable, or macro) that you use in foo.cc, either foo.cc or foo.h should #include a .h file that exports the declaration of that symbol. The include-what-you-use tool is a program that can be built with the clang libraries in order to analyze #includes of source files to find include-what-you-use violations, and suggest fixes for them.
The main goal of include-what-you-use is to remove superfluous #includes. It does this both by figuring out what #includes are not actually needed for this file (for both .cc and .h files), and replacing #includes with forward-declares when possible.
There are three methods to install iwyu on Debian 9. We can use apt-get, apt and aptitude. In the following sections we will describe each method. You can choose one of them.
Install iwyu Using apt-get
Update apt database with apt-get using the following command.
sudo apt-get update
After updating apt database, We can install iwyu using apt-get by running the following command:
sudo apt-get -y install iwyu
Install iwyu Using apt
Update apt database with apt using the following command.
sudo apt update
After updating apt database, We can install iwyu using apt by running the following command:
sudo apt -y install iwyu
Install iwyu Using aptitude
If you want to follow this method, you might need to install aptitude first since aptitude is usually not installed by default on Debian. Update apt database with aptitude using the following command.
sudo aptitude update
After updating apt database, We can install iwyu using aptitude by running the following command:
sudo aptitude -y install iwyu
How To Uninstall iwyu on Debian 9
To uninstall only the iwyu package we can use the following command:
sudo apt-get remove iwyu
Uninstall iwyu And Its Dependencies
To uninstall iwyu and its dependencies that are no longer needed by Debian 9, we can use the command below:
sudo apt-get -y autoremove iwyu
Remove iwyu Configurations and Data
To remove iwyu configuration and data from Debian 9 we can use the following command:
sudo apt-get -y purge iwyu
Remove iwyu configuration, data, and all of its dependencies
We can use the following command to remove iwyu configurations, data and all of its dependencies, we can use the following command:
sudo apt-get -y autoremove --purge iwyu
Dependencies
iwyu have the following dependencies:
References
Summary
In this tutorial we learn how to install iwyu package on Debian 9 using different package management tools: apt, apt-get and aptitude.