[Bug target/104219] [12 regression] riscv64 compiler build fails

[kito at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104219

--- Comment #5 from Kito Cheng <kito at gcc dot gnu.org> ---
I plan back port this fix to GCC 11 branch too, and will close this bug after
back port.