[cmake-developers] CMake 3.40, CMAKE_C_STANDARD_COMPUTED_DEFAULT and LTO

[Setze Post]

First ever upstreamed upstreamed mail from me, please gently inform me
if I took the wrong route here.
Running Gentoo Linux x86_64 and compiling with LTO enabled in C*FLAGS,
the configuration stage seems to fail compiling CMake 3.4.0 as described
here: https://bugs.gentoo.org/show_bug.cgi?id=565744
Compiling CMake without LTO worked flawlessly, however, the same problem
seems to always occur when compiling other packages using CMake with LTO
enabled for those packages. I managed to fix the issue for my local
machines applying a patch I wrote, available here:
https://bugs.gentoo.org/attachment.cgi?id=416970
However, I am not very knowledgeable about C, configure/compile tool
chains and CMake, so I imagine something totally unrelated might be
going on here just as well.

Thanks

Sietze