[root@asterinas:~]# cat /proc/version
Linux version 5.13.0 (root@kiryca) (rustc 1.94.0-nightly) #1 Wed Dec 17 02:57:56 UTC 2025

Hi all,
I'm trying to write a derivation for an embedded C++ microcontroller application.
For this, I must use a copy of libstdc++ with something like --enable-cxx-flags='-fno-exceptions -fno-rtti' (docs here).
Is there a way to configure Nixpkgs to use these settings for libstdc++ for the host platform? Something to add to the following, for example?

import <nixpkgs> {
  crossSystem = {
    config = "arm-none-eabihf";
    libc = "newlib-nano";
    gcc = {
      cpu = "cortex-m7";
      fpu = "fpv5-d16";
      float-abi = "hard";
      thumb = true;
    };
    rust.rustcTarget = "thumbv7em-none-eabihf";
    isStatic = true;
  }
}