Fix #13873

[leducp]

Summary

#13755 break C++ build with GCC libstdc++. This PR re-enable the macro while takin care of MSVC build.

Impact

Fix #13873 - build on G++ while keeping MSVC happy.

Testing

Only with GCC, I do not have tools to test on MSVC.

[xiaoxiang781216]

@leducp could you switch one defconfig to link toolchain's libcxx?

[leducp]

ping @xuxin930 Can you test this PR with your MSVC setup to ensure no regression on your side?

[leducp]

@leducp could you switch one defconfig to link toolchain's libcxx?

Yes I am planning to do so, but it will not be sufficient: we need a user app that use a few tools from the standard C++ library to catch theses kind of errors.
I can add something but I do not know how to tell the CI to use it. Any clue?

[xiaoxiang781216]

@leducp could you switch one defconfig to link toolchain's libcxx?

Yes I am planning to do so, but it will not be sufficient: we need a user app that use a few tools from the standard C++ library to catch theses kind of errors.

it's enough to enable apps/testing/cxxtest/

I can add something but I do not know how to tell the CI to use it. Any clue?

it simple to add/modify one defconfig under boards/, ci will build your defconfig automatically.

[leducp]

@leducp could you switch one defconfig to link toolchain's libcxx?

Yes I am planning to do so, but it will not be sufficient: we need a user app that use a few tools from the standard C++ library to catch theses kind of errors.

it's enough to enable apps/testing/cxxtest/

I can add something but I do not know how to tell the CI to use it. Any clue?

it simple to add/modify one defconfig under boards/, ci will build your defconfig automatically.

I enabled the cxxtest app and the C++ toolchain with all options (RTTI, exceptions, etc) on the xmc4800-relax. Let me know if this is OK

[xiaoxiang781216]

looks fine.