[gentoo-embedded] add buildroot external toolchain to gentoo

[Kfir Lavi]

Hi,
I would like to add a buildroot toolchain to gentoo, and use the regular
crossdev way to use it.
I have tried:
emerge-wrapper --target x86_64-buildroot-linux-gnu --init


But the compiler used it the system compiler.
Is there a tutorial to do this?

Note that all the toolchain is inside /usr/x86_64-buildroot-linux-gnu
I also tried to add it to /etc/env.d/gcc but it didn't work.

I did read gcc-config and emerge-wrapper code, but without much luck.

Looking for any pointers.

Regards,
Kfir