A first test of make-toolchain-environment

{
  pkgs ? import <nixpkgs> { },
  ...
}:

with pkgs;
mkShell {
  buildInputs = [
    gcc15
    coreutils
    gawk
    gnumake
    binutils
  ];

  shellHook = ''

    # TODO: This could be done with an overlay
    #       filesystem and so not disrupt a thing.

    w='-'  # '+' for noisy, '-' for quiet.
    syms=symlinks$w
    libs=libraries$w

    pkgs="${glibc} ${glibc.dev}"

    rm -R -f POSIX

    mkdir -p POSIX/include
    for p in $pkgs; do
      for dir in include; do
        $HOME/.local/bin/mte $syms $p/$dir POSIX/$dir
      done
    done

    mkdir -p POSIX/lib
    for p in $pkgs; do
      for dir in lib; do
        $HOME/.local/bin/mte $libs $p/$dir POSIX/$dir
      done
    done

    export PATH="${gcc15}/bin:$PATH"
    export CC=${gcc15}/bin/gcc
    export CPPFLAGS=-idirafter`pwd`/POSIX/include
    export LDFLAGS=-L`pwd`/POSIX/lib
  '';
}