[CMake] Alternative to `add_compile_options` in Toolchain Files

[Cristian Adam]

Hi,

If your CMake version is newer than 3.11 you can control what gets into the
CMAKE_<Lang>_FLAGS_INIT flags with the technique from
https://cristianadam.eu/20190223/modifying-the-default-cmake-build-types/

In your case you want to remove from the linker flags init the cxx compiler
options.

Cheers
Cristian.

On Wed, Mar 27, 2019, 03:10 Jayesh Badwaik <badwaik.jayesh at gmail.com> wrote:

> Hi,
>
> In https://gitlab.kitware.com/cmake/cmake/issues/19074, it was mentioned
> that
> instead of `add_compile_options`, `CMAKE_CXX_FLAGS_INIT` should be used.
> An
> issue with this is that `CMAKE_CXX_FLAGS_INIT` flags are propogated to the
> linker as well, wherein, the linker warns about `[-Wunused-command-line-
> argument]` if those warnings are enabled.
>
> Is there an alternative to `CMAKE_CXX_FLAGS_INIT` which avoids these
> issues?
>
> Thanks
>
> --
> Best
> Jayesh Badwaik
> https://jayeshbadwaik.github.io
>
> --
>
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