iwyu command not found

Introduction

When you run more command in linux terminal / console, you get the following error message

iwyu: command not found

or when using sudo you get the following error message

sudo: iwyu: command not found

Solutions to iwyu: command not found

How To Fix iwyu: command not found in Ubuntu / Debian / Kali Linux / Raspbian

In Ubuntu iwyu is provided by iwyu package.

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.

To fix this problem, we can install more using the command below.

sudo apt-get -y install iwyu

This command might take some time to finish depending on your machine internet connection.

You can also use apt command to install iwyu.

sudo apt -y install iwyu

Or if you have aptitude installed you can use the following command.

sudo aptitude install iwyu

Summary

In this tutorial we learn how to fix iwyu command not found error in Ubuntu / Debian / Kali Linux or Raspbian distribution.