Fix various compile warnings #31
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@TartanLlama any chance of having this PR merged? |
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This fixes some compile warnings. To avoid introducing new warnings by accident, I added the option
OPTIONAL_WERRORto the CMake config which allows to compile with the flags-Werror,-Wall,-Wextraand-pedantic. This option is disabled by default (to avoid errors when using for example a more recent compiler), but enabled on CI to make CI fail on warnings.In addition, I added new CI jobs for GCC 9.x to increase compiler coverage.
Please let me know if I should change something. Especially with CMake I have no experience at all.