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

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1

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 :slight_smile:

2

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?

3

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.

4

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

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5

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 !

6

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

in the shell.nix file…

an example is here.

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…

https://github.com/NixOS/nixpkgs/search?p=4&q=LD_LIBRARY_PATH

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…

1 Like
7

Thanks, that did the trick :slight_smile:

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

1 Like