[Bug d/100324] gcc-10.2.0 (and earlier) fails to build on x86_64, but has builds just fine aarch64

[ibuclaw at gdcproject dot org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100324

--- Comment #9 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
Does configure succeed in all multilib subdirectories?

tail x86_64-linux-gnu/*/libphobos/config.log
x86_64-linux-gnu/libphobos/config.log

And if one doesn't, inspect it to see why.