warnings.md

February 16, 2019 ยท View on GitHub

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Compiler warnings

  1. All code should compile cleanly without any compiler warnings at the highest warning level. Disabling important warnings is not allowed, except selectively for third-party libraries.

    • In almost all cases, if the compiler emits a warning, there is something wrong with the code. Write clean code, instead of ignoring or even disabling the warning.

  2. Use the -Wall -Wextra flags in GCC and Clang to enable most warnings, and enable more if deemed necessary.

    Consider using the -Weverything flag in Clang to enable all warnings (a flag absent from GCC), and then explicitly disable the ones deemed unimportant.

    Use the /W4 flag in Visual C++.

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