libtcod is missing a pkgconfig declaration

[ThibaultLemaire]

I'd like to use pkg-config to discover the libtcod library, but it doesn't pick up anything.

To Reproduce

nix-shell -p pkg-config libtcod --run 'echo $PKG_CONFIG_PATH'

Expected behavior

❯ nix-shell -p pkg-config libtcod --run 'echo $PKG_CONFIG_PATH'
/nix/store/7wa3n1p2vd9789jdw9f7l3szdqmgc8x9-libtcod-1.5.1/lib/pkgconfig

Metadata

 - system: `"x86_64-linux"`
 - host os: `Linux 4.19.75, NixOS, 20.03pre194293.2436c27541b (Markhor)`
 - multi-user?: `yes`
 - sandbox: `yes`
 - version: `nix-env (Nix) 2.3`
 - channels(root): `"nixos-20.03pre194293.2436c27541b, home-manager, nur"`
 - channels(█████████): `""`
 - nixpkgs: `/nix/var/nix/profiles/per-user/root/channels/nixos`

Maintainer information:

# a list of nixpkgs attributes affected by the problem
attribute:
# a list of nixos modules affected by the problem
module:
 - libtcod

[stale[bot]]

Thank you for your contributions. This has been automatically marked as stale because it has had no activity for 180 days. If this is still important to you, we ask that you leave a comment below. Your comment can be as simple as "still important to me". This lets people see that at least one person still cares about this. Someone will have to do this at most twice a year if there is no other activity. Here are suggestions that might help resolve this more quickly:

1. Search for maintainers and people that previously touched the related code and @ mention them in a comment.
2. Ask on the NixOS Discourse. 3. Ask on the #nixos channel on irc.freenode.net.

[ThibaultLemaire]

I have no usecase for this anymore.

[stale[bot]]

I marked this as stale due to inactivity. → More info

[Artturin]

Upstream only installs it when autotools is used https://github.com/libtcod/libtcod/search?q=pkgconfig&type=code