SDL_image error : libjpeg.so.62: cannot open shared object file: no such file or directory

leo · October 20, 2020, 6:46am

Hello,

I am a new NixOS user and I am facing a problem with SDL_Image.

What I am trying to accomplish

I need to compile a C project that makes use of SDL and SDL_Image libraries. So i created a default.nix at the root of my project.

with import <nixpkgs> {};

pkgs.mkShell {
    buildInputs = [
        gcc
        gnumake
        SDL
        SDL_image
        pkg-config
        libjpeg_original
    ];
}

and then ran nix-shell. I successfully compiled the project. And when I try to run it (inside the nix-shell) there is this error that comes up :

Failed loading libjpeg.so.62: libjpeg.so.62: cannot open shared object file: No such file or directory

I tried multiple libjpeg packages available in nixpkgs but none of them worked. Is there something I am missing ?

Thanks for your help

nixinator · October 20, 2020, 10:07pm

might be something todo with

https://github.com/NixOS/nixpkgs/commit/1005d786ba87a7e3507423e38dba02d04c01819a#diff-5705939fa3f2d4606c476b6d6775508b2bb4ad1fb913e8c4dc8a77671c31cbcf

where it was removed because it was broken.

is this a very old SDL project?

leo · October 20, 2020, 10:23pm

Thanks for your reply !

It is maybe 4 years old, but last time (3 weeks ago) I compiled it in archlinux and ran it in archlinux and it worked.

jtojnar · October 20, 2020, 10:26pm

You can find libjpeg.so.62 in libjpeg_turbo package. libjpeg_original.out only has libjpeg.so.9.

leo · October 20, 2020, 10:57pm

Thanks, I installed the libjpeg_turbo package and I had to exec

export LD_LIBRARY_PATH=/nix/store/cc2ha98f506jfgal0xwdwrnmxnr5imvd-libjpeg-turbo-2.0.3/lib

before running my project and it worked !

But I was wondering if there was a cleaner way to do this ? Maybe there is a way to specify the shared libs that we want to use in default.nix (nix-shell command would then populate the right env variables).

Thanks @jtojnar for your answer !

nixinator · October 20, 2020, 11:17pm

you can use
LD_LIBRARY_PATH="${libjpeg_turbo}/lib:";

in the shell.nix file…

an example is here.

github.com

NixOS/nixpkgs/blob/fda4a08d4a1dd1509bb4c3ab110fb8665f47cc00/pkgs/development/lisp-modules/shell.nix

with import ../../../default.nix {};
let
openssl_lib_marked = import ./openssl-lib-marked.nix;
self = rec {
  name = "ql-to-nix";
  env = buildEnv { name = name; paths = buildInputs; };
  buildInputs = [
    gcc stdenv
    openssl fuse libuv libmysqlclient libfixposix libev sqlite
    freetds
    lispPackages.quicklisp-to-nix lispPackages.quicklisp-to-nix-system-info
  ];
  CPATH = "${libfixposix}/include";
  LD_LIBRARY_PATH = "${openssl.out}/lib:${fuse}/lib:${libuv}/lib:${libev}/lib:${libmysqlclient}/lib:${libmysqlclient}/lib/mysql:${postgresql.lib}/lib:${sqlite.out}/lib:${libfixposix}/lib:${freetds}/lib:${openssl_lib_marked}/lib";
};
in stdenv.mkDerivation self

ah, my bad…you asked to set it default.nix… well groking nixpkgs…

there seems to be a few ways to do it, I’m not sure what’s the cleanest… or what the standard is…

however…

this looks good to me… for example this uses lib.makeLibraryPath

LD_LIBRARY_PATH = lib.makeLibraryPath [ libX11 libXext libXfixes libusb1 udev bluez ];

and the export it in the preBuild part.

preBuild = ''
    export LD_LIBRARY_PATH=${LD_LIBRARY_PATH}
  '';

with nixpkgs, there’s about 3000 ways to skin a cat… groking it seems to a few ways of setting it, maybe it’s just older vs newer, or just personal style of those committers, or to coax the original build system (make/cmake/autoconf/pkgconf etc etc) into playing nice and behaving…

leo · October 21, 2020, 5:04am

Thanks, that did the trick

I am marking this thread as resolved. Thanks everybody for your contributions.