Unable to find SDL on Ubuntu 22.04

[stuartlangridge]

I tried running https://github.com/littledivy/flappybird on Ubuntu 22.04 with the following result:

18:28 ~/Sc+/flappybird (main) $ ls /usr/lib/x86_64-linux-gnu/libSDL2*
/usr/lib/x86_64-linux-gnu/libSDL2-2.0.so.0
/usr/lib/x86_64-linux-gnu/libSDL2-2.0.so.0.18.2
/usr/lib/x86_64-linux-gnu/libSDL2_image-2.0.so.0
/usr/lib/x86_64-linux-gnu/libSDL2_image-2.0.so.0.2.3
/usr/lib/x86_64-linux-gnu/libSDL2_mixer-2.0.so.0
/usr/lib/x86_64-linux-gnu/libSDL2_mixer-2.0.so.0.2.2
/usr/lib/x86_64-linux-gnu/libSDL2_net-2.0.so.0
/usr/lib/x86_64-linux-gnu/libSDL2_net-2.0.so.0.0.1
/usr/lib/x86_64-linux-gnu/libSDL2_ttf-2.0.so.0
/usr/lib/x86_64-linux-gnu/libSDL2_ttf-2.0.so.0.18.0
18:28 ~/Sc+/flappybird (main) $ uname -a
Linux oz 5.15.0-119-generic #129-Ubuntu SMP Fri Aug 2 19:25:20 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux
18:28 ~/Sc+/flappybird (main) $ lsb_release -a
No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu 22.04.4 LTS
Release:	22.04
Codename:	jammy
18:28 ~/Sc+/flappybird (main) $ ./flappybird 
error: Uncaught (in promise) Error: Could not open library: Could not open library: libSDL2.so: cannot open shared object file: No such file or directory
    at new DynamicLibrary (ext:deno_ffi/00_ffi.js:454:42)
    at Object.dlopen (ext:deno_ffi/00_ffi.js:558:10)
    at https://jsr.io/@divy/sdl2/0.12.0/mod.ts:28:19

The deno people suggested in https://fosstodon.org/@deno_land/113108106611366244 that this looks like a bug in this library, and I should file it here, so here it is.

[hakandarama]

I'm using NixOS but, I think that solution could may be the same so I don't want to open another request.

I have a nix shell file like below,

   pkgs.mkShell {
     buildInputs = [
 pkgs.deno
       pkgs.SDL2
       pkgs.rustc
       pkgs.cargo
        pkgs.SDL2_image
        pkgs.gcc
        pkgs.SDL2_ttf
        pkgs.mlocate
        pkgs.findutils
        pkgs.nix-index
     ];
   }

After shell init here is my libraries about SDL2

[sudo] password for interroo: 
find: ‘/run/user/1000/gvfs’: Permission denied
find: ‘/run/user/1000/doc’: Permission denied
/nix/store/jc13yn8zh855il4bkbybpnpisds70mkx-SDL2-2.30.6-dev/include/SDL2
/nix/store/jc13yn8zh855il4bkbybpnpisds70mkx-SDL2-2.30.6-dev/lib/cmake/SDL2
/nix/store/g3dyaid12r0cjq5sqcfjxd3dckbkz63w-nixos/nixos/pkgs/development/libraries/SDL2
/nix/store/lsy6c2f9alj2gkjj36h754kk63x6701l-source/pkgs/development/libraries/SDL2
/nix/store/f9s5ppf6ay05wsviyrn8jb44lbbkb04q-SDL2_sound-2.0.1/include/SDL2
/nix/store/dbp40ny9x8svygk01769g6d12zsj7jq9-nixos/nixos/pkgs/development/libraries/SDL2
/nix/store/vih8vdck628mm1xxnhi1d3rzy68h1yi6-nixos/nixos/pkgs/development/libraries/SDL2
/nix/store/ghg5yhiv547s10rjgiajk60vmavza70w-nixos/nixos/pkgs/development/libraries/SDL2
/nix/store/4yg6mlimzrjcg11jvqv5yb1xdj67c216-SDL2_ttf-2.22.0/include/SDL2
/nix/store/p01c6lmcijvjb3yfnqb8x3hkzxmc4jhz-SDL2_image-2.8.2/include/SDL2
/nix/store/f88l5vi0ms8v52qknpxzdqcs47mc79b0-home-manager-path/include/SDL2
/nix/store/1k4ilbly8y28yja0clq2gm1y0gaji6z9-SDL2_ttf-2.22.0/include/SDL2
/nix/store/yqrq1h81sc6bdz6jlxxipi3qvcld5190-jetbrains-toolbox-2.4.1.32573-fhs/usr/include/SDL2
/nix/store/9j29lw4g9vxlsd0pkz3bw6vf50v48pp0-jetbrains-toolbox-2.4.1.32573-fhs/usr/include/SDL2
/nix/store/qxxg4678zm816k1r3i144gn54z2dw3h3-jetbrains-toolbox-2.4.1.32573-usr-target/include/SDL2
/nix/store/4nrdmbi5gbmlfdsh2mxm74amlk3id3yb-jetbrains-toolbox-2.4.1.32573-fhs/usr/include/SDL2
/nix/store/xfxshsfh47fbqlmymaxzvprgh03fjp1b-SDL2_image-2.8.2/include/SDL2
/nix/store/zqfqxi9zxids52cglw4qqb4rfmj2b914-jetbrains-toolbox-2.4.1.32573-usr-target/include/SDL2
/nix/store/6bklv1fayjcy8bzl63782rzsg73hrz6b-jetbrains-toolbox-2.4.1.32573-usr-target/include/SDL2

And here is sdl2-config output

-I/nix/store/jc13yn8zh855il4bkbybpnpisds70mkx-SDL2-2.30.6-dev/include/SDL2 -I/nix/store/jc13yn8zh855il4bkbybpnpisds70mkx-SDL2-2.30.6-dev/include/SDL2 -I/nix/store/xfxshsfh47fbqlmymaxzvprgh03fjp1b-SDL2_image-2.8.2/include/SDL2 -I/nix/store/4yg6mlimzrjcg11jvqv5yb1xdj67c216-SDL2_ttf-2.22.0/include/SDL2 -I/nix/store/jc13yn8zh855il4bkbybpnpisds70mkx-SDL2-2.30.6-dev/include/SDL2 -I/nix/store/xfxshsfh47fbqlmymaxzvprgh03fjp1b-SDL2_image-2.8.2/include/SDL2 -I/nix/store/4yg6mlimzrjcg11jvqv5yb1xdj67c216-SDL2_ttf-2.22.0/include/SDL2 -D_REENTRANT
-L/nix/store/z9mxzhabjab303ffgpg6szc85rmxc3nx-SDL2-2.30.6/lib -Wl,-rpath,/nix/store/z9mxzhabjab303ffgpg6szc85rmxc3nx-SDL2-2.30.6/lib -Wl,--enable-new-dtags -lSDL2

Btw, I couldn't run demos... And here is my error message

error: Uncaught (in promise) Error: Could not open library: Could not open library: libSDL2.so: cannot open shared object file: No such file or directory
const sdl2 = Deno.dlopen(getLibraryPath("SDL2"), {
                  ^
    at new DynamicLibrary (ext:deno_ffi/00_ffi.js:456:42)
    at Object.dlopen (ext:deno_ffi/00_ffi.js:562:10)
    at https://jsr.io/@divy/sdl2/0.14.0/mod.ts:48:19

Thanks in advance...

[hakandarama]

Well... I just rewrite my shell.nix through README today and sharing

{ pkgs ? import <nixpkgs> {} }:
   pkgs.mkShell {
     buildInputs = [
       	pkgs.deno
       	pkgs.SDL2
	pkgs.SDL2_image
	pkgs.SDL2_ttf
       	pkgs.rustc
       	pkgs.cargo
	pkgs.gcc
	pkgs.mlocate
	pkgs.findutils
	pkgs.nix-index
     ];
     shellHook = ''
	export DENO_SDL2_PATH=/tmp/denosdl
	if [ -d "$DENO_SDL2_PATH" ]; then rm -Rf $DENO_SDL2_PATH; fi
	mkdir $DENO_SDL2_PATH
	ln -s $(nix eval nixpkgs#SDL2.outPath --raw)/lib/libSDL2.so $DENO_SDL2_PATH
	ln -s $(nix eval nixpkgs#SDL2_ttf.outPath --raw)/lib/libSDL2_ttf.so $DENO_SDL2_PATH
	ln -s $(nix eval nixpkgs#SDL2_image.outPath --raw)/lib/libSDL2_image.so $DENO_SDL2_PATH
     '';
}

Hope this helps somebody....

[hmleal]

Hello @stuartlangridge, I hope you are still trying to run the flappybird game ^^

Basead on your log uou can easily just do something like this:

DENO_SDL2_PATH=/usr/lib/x86_64-linux-gnu/ deno run examples/hello.ts from the root folder

This library from some reason expects the SDL2_PATH to be config up front instead of searching for it inside of the OS

You can see more details here: https://github.com/littledivy/deno_sdl2/blob/main/mod.ts#L13

[hmleal]

@littledivy Can we fix the try/catch to in case DENO_SDL2_PATH search it inside of the OS? Or at least insert a better message?

https://github.com/littledivy/deno_sdl2/blob/main/mod.ts#L17C3-L17C59

I can work on the PR, thanks in advance

[stuartlangridge]

Basead on your log uou can easily just do something like this:
DENO_SDL2_PATH=/usr/lib/x86_64-linux-gnu/ deno run examples/hello.ts from the root folder
This library from some reason expects the SDL2_PATH to be config up front instead of searching for it inside of the OS

Sadly this doesn't seem to work, still, although it's closer:

$ DENO_SDL2_PATH=/usr/lib/x86_64-linux-gnu deno run --allow-env --allow-ffi main.js 
error: Uncaught (in promise) Error: Could not open library: Could not open library: /usr/lib/x86_64-linux-gnu/libSDL2.so: cannot open shared object file: No such file or directory
const sdl2 = Deno.dlopen(getLibraryPath("SDL2"), {
                  ^
    at new DynamicLibrary (ext:deno_ffi/00_ffi.js:456:42)
    at Object.dlopen (ext:deno_ffi/00_ffi.js:562:10)
    at https://jsr.io/@divy/sdl2/0.12.0/mod.ts:47:19

and this is because it seems to be looking for /usr/lib/x86_64-linux-gnu/libSDL2.so whereas what actually exists is /usr/lib/x86_64-linux-gnu/libSDL2-2.0.so.0.