[Bug target/66203] aarch64-none-elf does not automatically find librdimon

[rearnsha at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66203

--- Comment #4 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
The Arm builds that do not need anything from libgloss (and thus do not need a
specs file) while linking come from a configuration that hard codes the
underlying runtime monitor (usually the arm semihosting ABI) directly into
newlib.

I understand that's deprecated and was not implemented for AArch64.