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Code Coverage with gcov

Instrument C/C++ builds with gcov and generate text and HTML coverage reports.

Updated Apr 28, 2026
Search Tags:#testing#code-coverage#gcov#coverage-report#gcovr#c-cpp#build-instrumentation
One-click install
npx skills add https://github.com/roberttmadsen13-del/TOURney --skill code-coverage-with-gcov-roberttmadsen13-del
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: Code Coverage with gcov
Source: https://github.com/roberttmadsen13-del/TOURney/tree/main/SKILLS/raptor-main/.claude/skills/crash-analysis/gcov-coverage
Command: npx skills add https://github.com/roberttmadsen13-del/TOURney --skill code-coverage-with-gcov-roberttmadsen13-del

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Instrument C/C++ programs with gcov to measure test coverage.

Core Features & Use Cases

  • Instrument builds with coverage flags and generate .gcda/.gcno data
  • Generate text and HTML coverage reports using gcov and gcovr
  • Use case: verify test suite coverage and identify untested code

Quick Start

Instrument your C/C++ project with gcov, run tests, and review the generated coverage reports.

Frequently Asked Questions about Code Coverage with gcov

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I measure C/C++ test coverage using gcov?▼

To measure C/C++ test coverage using gcov, you instrument builds with coverage flags, execute tests to generate .gcda/.gcno data, and produce text or HTML coverage reports.

Can I generate HTML coverage reports for CMake based projects?▼

Yes, you can generate HTML coverage reports for CMake based projects by enabling coverage flags during the build, running tests, and using gcovr to create the final report output.

What is the best way to instrument a Makefile project for code coverage?▼

The best way to instrument a Makefile project for code coverage is applying gcov build instrumentation flags, cleaning previous builds, and running tests to collect the coverage data.

Why does gcov show stale coverage data in my C/C++ reports?▼

Stale coverage data in gcov reports usually appears when previous builds are not cleaned; cleaning the project before enabling coverage flags and running tests ensures accurate data collection.

Do I need gcovr to generate HTML coverage reports from gcov data?▼

Yes, you need gcovr to generate HTML coverage reports from gcov data, as it processes the .gcda/.gcno files produced during test execution into readable text and HTML formats.

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