How Can I Identify and Remove Unnecessary Header Files in C/C Code?

Identifying Unnecessary Header Inclusions in C/C Code

Problem:

Source code headers tend to accumulate over time due to refactoring and code movement. This can result in superfluous #include directives that prolong compilation and create unnecessary dependencies. Manually identifying these obsolete includes can be耗费時間.

Solution:

Tools have been developed to detect superfluous #includes, including:

cppclean:

Google's cppclean utility scans C code for various issues, including unused #includes. It identifies and suggests the removal of these unnecessary directives.

include-what-you-use:

Based on Clang, include-what-you-use can not only detect superfluous #includes but also suggest forward declarations for optimized header inclusion and optionally perform cleanup.

Eclipse CDT:

Recent versions of Eclipse CDT include a built-in feature under the Source menu called "Organize Includes." This tool alphabetizes #includes, adds missing headers, and comments out unused includes based on its analysis. However, its accuracy may vary.

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