CI Workflow does not use warnings as errors on Linux GCC

[DAflamingFOX]

The Linux GCC platform in CI does not treat compiler warnings as errors.

see here for an example of this issue; Windows, Linux clang, and MacOS all threw an error on the same narrowing warning but Linux GCC did not.

CMake has a property to enable this feature:
set_property(TARGET my_target PROPERTY COMPILE_WARNING_AS_ERROR ON)

[ChrisThrasher]

If you want to add -DCMAKE_COMPILE_WARNING_AS_ERROR=ON to the bash commands being executed in CI then I’d accept that. There are lots of things we could add to this template that arguably most projects should include, but we generally choose to keep it fairly minimal, allowing users to add all the extra stuff they want.