kaldi-active-grammar: "cannot load library"

[Lykos153]

Describe the bug

I'm trying to run the example script https://raw.githubusercontent.com/daanzu/kaldi-active-grammar/master/examples/full_example.py, but I get the following error:

Kaldi-Active-Grammar v3.1.0:
    If this free, open source engine is valuable to you, please consider donating
    https://github.com/daanzu/kaldi-active-grammar
    Disable message by calling `kaldi_active_grammar.disable_donation_message()`
Traceback (most recent call last):
  File "/home/silvio/kaldi/full_example.py", line 10, in <module>
    compiler = kaldi_active_grammar.Compiler(model_dir=model_dir, tmp_dir=tmp_dir)
  File "/nix/store/incraiihd7bdwvrgh46kz5648bf4ks27-python3-3.9.12-env/lib/python3.9/site-packages/kaldi_active_grammar/compiler.py", line 270, in __init__
    NativeWFST.init_class(
  File "/nix/store/incraiihd7bdwvrgh46kz5648bf4ks27-python3-3.9.12-env/lib/python3.9/site-packages/kaldi_active_grammar/wfst.py", line 202, in init_class
    cls.init_ffi()
  File "/nix/store/incraiihd7bdwvrgh46kz5648bf4ks27-python3-3.9.12-env/lib/python3.9/site-packages/kaldi_active_grammar/ffi.py", line 35, in init_ffi
    cls._lib = _ffi.init_once(cls._init_ffi, cls.__name__ + '._init_ffi')
  File "/nix/store/incraiihd7bdwvrgh46kz5648bf4ks27-python3-3.9.12-env/lib/python3.9/site-packages/cffi/api.py", line 749, in init_once
    result = func()
  File "/nix/store/incraiihd7bdwvrgh46kz5648bf4ks27-python3-3.9.12-env/lib/python3.9/site-packages/kaldi_active_grammar/ffi.py", line 40, in _init_ffi
    return _ffi.dlopen(_library_binary_path)
  File "/nix/store/incraiihd7bdwvrgh46kz5648bf4ks27-python3-3.9.12-env/lib/python3.9/site-packages/cffi/api.py", line 150, in dlopen
    lib, function_cache = _make_ffi_library(self, name, flags)
  File "/nix/store/incraiihd7bdwvrgh46kz5648bf4ks27-python3-3.9.12-env/lib/python3.9/site-packages/cffi/api.py", line 832, in _make_ffi_library
    backendlib = _load_backend_lib(backend, libname, flags)
  File "/nix/store/incraiihd7bdwvrgh46kz5648bf4ks27-python3-3.9.12-env/lib/python3.9/site-packages/cffi/api.py", line 827, in _load_backend_lib
    raise OSError(msg)
OSError: cannot load library '/nix/store/w6qjl5zfygzyica619imp2pvpy7hydyf-kaldi-kag-v2.1.0/lib/libkaldi-dragonfly.so': libstdc++.so.6: cannot open shared object file: No such file or directory.  Additionally, ctypes.util.find_library() did not manage to locate a library called '/nix/store/w6qjl5zfygzyica619imp2pvpy7hydyf-kaldi-kag-v2.1.0/lib/libkaldi-dragonfly.so'

Steps To Reproduce

Steps to reproduce the behavior:

1. nix develop into this flake:

{
  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/22.05";
    flake-utils.url = "github:numtide/flake-utils";
  };

  outputs = { self, nixpkgs, flake-utils }:
    flake-utils.lib.eachDefaultSystem (system:
      let
        pkgs = nixpkgs.legacyPackages.${system};

        my-python = pkgs.python3;
        python-with-my-packages = my-python.withPackages (p: with p; [
#          dragonfly
          kaldi-active-grammar
        ]);
      in {
        devShell = pkgs.mkShell {
         packages = [
           python-with-my-packages
          ];
        };
      });
}

3. wget https://raw.githubusercontent.com/daanzu/kaldi-active-grammar/master/examples/full_example.py
4. (Adapt paths in script)
5. python full_example.py

Expected behavior

I'm trying out the software for the first time, so I didn't know what to expect, but I guess I didn't expect this error.

Additional context

I tried nixpkgs master first, but there, kaldi-kag wouldn't build.

Notify maintainers

@ckiee

Metadata

[user@system:~]$ nix-shell -p nix-info --run "nix-info -m"
 - system: `"x86_64-linux"`
 - host os: `Linux 5.15.76, NixOS, 22.11 (Raccoon)`
 - multi-user?: `yes`
 - sandbox: `yes`
 - version: `nix-env (Nix) 2.11.0`
 - channels(silvio): `"home-manager"`
 - nixpkgs: `/nix/var/nix/profiles/per-user/root/channels/nixos`