gcovr
Generate C/C++ code coverage reports with gcov
Decision gist · record as of 2026-08-14
Yes. Gcovr is a mature, actively maintained tool (production-stable, last commit 2026-08-12) with low install friction, no known vulnerabilities, and a permissive license. Install it if you need to measure or report code coverage for GCC-compiled C/C++ projects, especially in CI/CD contexts where structured output formats are required.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Requires GCC-compiled code instrumented with --coverage flag; gcov utility must be available on the system.
- Low install friction: pure Python wheel with five common dependencies (colorlog, jinja2, lxml, pygments, tomli).
- Active maintenance with last commit 2026-08-12 and 213 days since last release; stable production status.
License · maintenance · safety
BSD-3-Clause (permissive) — BSD-3-Clause permissive license allows commercial and private use with minimal restrictions; suitable for most projects.
last release 2026-01-13 (213 days) · last repo commit 2026-08-12 · 991 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 4,376,275 downloads/mo, #2,316 on PyPI
Alternatives
Verify before relying
pip install gcovr
# After compiling C/C++ code with --coverage -g -O0 and running tests:
gcovr
# Generate detailed HTML report:
gcovr --html-details coverage.html- Whether gcovr works with Clang or other compilers beyond GCC.
- Performance characteristics when processing large codebases or many coverage files.
- Integration requirements with CI/CD systems beyond the CLI interface.
What it is and what it does
Gcovr is a command-line tool that wraps GCC's gcov utility to collect and report code coverage from C and C++ projects. It reads raw coverage data generated by instrumented executables and transforms it into human-readable summaries or structured reports in formats like HTML, JSON, CSV, and various XML dialects (Cobertura, Clover, JaCoCo, LCOV, SonarQube). The tool is inspired by Python's coverage.py and fills a similar role for compiled languages.
You use gcovr after compiling your code with GCC's --coverage flag and running your test suite. It can produce compact console summaries, detailed HTML pages with per-file annotations, or machine-readable reports for integration with CI systems and coverage dashboards. The package depends on colorlog for colored output, jinja2 for HTML templating, lxml for XML processing, pygments for syntax highlighting, and tomli for configuration parsing.
Use it for
- Generate coverage reports in CI/CD pipelines to track test quality across builds and commits.
- Create HTML coverage dashboards showing which lines of C/C++ code are exercised by tests.
- Export coverage data to Cobertura or SonarQube format for integration with quality gates.
- Produce JSON or CSV summaries of coverage metrics for automated analysis or metrics collection.
- Compare coverage across different test runs or branches using LCOV or Coveralls formats.
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes.
Gcovr is a mature, actively maintained tool (production-stable, last commit 2026-08-12) with low install friction, no known vulnerabilities, and a permissive license. Install it if you need to measure or report code coverage for GCC-compiled C/C++ projects, especially in CI/CD contexts where structured output formats are required.
Install
gcovr on PyPI
Before you install
Low install friction: pure Python wheel with five common dependencies (colorlog, jinja2, lxml, pygments, tomli). Active maintenance with last commit 2026-08-12 and 213 days since last release; stable production status.
Requires GCC-compiled code instrumented with --coverage flag; gcov utility must be available on the system.
License in practice
BSD-3-Clause permissive license allows commercial and private use with minimal restrictions; suitable for most projects.
Quickstart
pip install gcovr
# After compiling C/C++ code with --coverage -g -O0 and running tests:
gcovr
# Generate detailed HTML report:
gcovr --html-details coverage.htmlVerify before relying
- Whether gcovr works with Clang or other compilers beyond GCC.
- Performance characteristics when processing large codebases or many coverage files.
- Integration requirements with CI/CD systems beyond the CLI interface.
Package facts
| License | BSD-3-Clause permissive |
| Python support | Supports the current Python release >=3.10 |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | 5 packagescolorlogjinja2lxmlpygmentstomli |
| Maintenance | Actively maintained 213 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 4,376,275 / month, #2,316 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | Development Status :: 5 - Production/StableEnvironment :: ConsoleIntended Audience :: DevelopersIntended Audience :: Science/ResearchLicense :: OSI Approved :: BSD LicenseNatural Language :: EnglishOperating System :: MacOS :: MacOS XOperating System :: Microsoft :: WindowsOperating System :: POSIXOperating System :: UnixProgramming Language :: PythonProgramming Language :: Python :: 3Programming Language :: Python :: 3.10Programming Language :: Python :: 3.11Programming Language :: Python :: 3.12Programming Language :: Python :: 3.13Programming Language :: Python :: 3.14Topic :: Software DevelopmentTopic :: Software Development :: Quality AssuranceTopic :: Software Development :: TestingTopic :: Utilities |
Evidence: gcovr-8.6-py3-none-any.whl
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See also fastcov · lcov-cobertura · nosexcover · pycobertura · diff-cover · slipcover · pytest-html · junit2html · coverage · codecov-cli