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Cppcheck is a static code analysis tool for the C and C++ programming languages.

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Files

Cppcheck will run on files with the following extensions:
  • .cpp
  • .cxx
  • .cc
  • .c
  • .tpp
  • .txx

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Configuration

CodeRabbit will use the following settings based on the profile selected:

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Chill

--disable=warning,style,information,portability,unusedFunction

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Assertive

--disable=warning,style,information
CodeRabbit will use the default settings based on the profile selected if no config file is found.

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When we skip Cppcheck

CodeRabbit will skip running Cppcheck when:
  • Cppcheck is already running in GitHub workflows.

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Filtered categories

The following categories are automatically filtered out in Chill mode:
  • normalCheckLevelMaxBranches - too many branches
  • toomanyconfigs - too many configurations
  • missingIncludeSystem - missing system includes
  • missingInclude - missing includes
  • unmatchedSuppression - unmatched suppressions

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Profile behavior

In Chill mode:
  • Disables: warning, style, information, portability, unusedFunction
  • Suppresses the filtered categories listed above
  • Only reports findings with severity “warning” or “error”
  • Filters out the noisy categories listed above
In Assertive mode:
  • Disables: warning, style, information
  • Reports all findings regardless of category
  • Does not suppress any categories

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Include directory discovery

Cppcheck automatically discovers top-level directories containing header files (.h, .hpp, .hxx, .hh) and adds them as include directories. This discovery is limited to a maximum depth of 5 levels to avoid scanning very large repositories.