How To Install iwyu on Debian 9

In this tutorial we learn how to install iwyu on Debian 9. iwyu is Analyze #includes in C and C++ source files

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.