The gcovr command provides a summary of the lines that have been executed in a program. Code coverage statistics help you discover untested parts of a program, which is particularly important when assessing code quality. Well-tested code is a characteristic of high quality code, and software developers often assess code coverage statistics when deciding if software is ready for a release.
The guide explains how to use the features of gcovr. In particular:
compilingoutput_formatsfilters
The manpage provides an overview of all options.
Specific problems might be addressed in the cookbook or the faq.