Undefined symbol

[kraxarn]

I get the following error when trying to require the .so file from a lua project:

"error loading module 'SDL' from file '/usr/local/lib/lua/5.1/SDL.so'" : 0 : undefined symbol

[Tangent128]

Hi; would you mind providing some extra information to see if I can help?

• where did you install LuaSDL2 to, and which version of Lua (5.1, 5.2, 5.3, JIT) did you build it for?
• what platform are you running on? (like Windows, Mac OSX, Ubuntu, Fedora, Arch, etc)
• what does the require line where you are loading LuaSDL2 look like?
• what are the values of package.path and package.cpath in your Lua script?

[Tangent128]

My best guess would be that you are using Lua 5.1, while the build system defaults to building a Lua 5.2 version of the module.

If you think that's the case, you can change the targeted Lua version; see Customizing The Build

[kraxarn]

Lua is installed to /usr/local/lib/lua/5.1/, but I also tried running it from the directory of the program. I'm running Ubuntu 15.04 x64 The require line is the same as in the example: local SDL = require 'SDL' And how do I check that package.path and cpath?

[Tangent128]

To check the paths, run this from Lua, either as a script or interactively:

print(package.path)
print(package.cpath)

It looks like you compiled Lua yourself, so I'm assuming you compiled the SDL module as well; did you set the Lua version to 5.1 when you did so?

[kraxarn]

Sorry, I meant this, luasdl, installed it with make install Lua is not compiled by me, it's installed from the official Ubuntu stuff

package.path: ./?.lua;/usr/local/share/lua/5.1/?.lua;/usr/local/share/lua/5.1/?/init.lua;/usr/local/lib/lua/5.1/?.lua;/usr/local/lib/lua/5.1/?/init.lua

package.cpath: ./?.so;/usr/local/lib/lua/5.1/?.so;/usr/local/lib/lua/5.1/loadall.so

[Tangent128]

Huh, Ubuntu installs Lua under /usr/local by default? But anyways, it seems like the module's being found, at least.

So, I assume you ran cmake at some point before running make install. Did you pass any flags to it?

If not, try passing -DWITH_LUAVER=51 at the cmake step, and rebuild.

[kraxarn]

Nah, it's installed to /usr/bin/lua5.1 And yea, I passed that flag to it, since I'm using Lua 5.1, haven't tried any other flag or no flag

[Tangent128]

Sorry for delay, was on vacation. I... am kinda baffled, unfortunately.

Would you be willing to try installing it through Luarocks? There should be an Ubuntu package.

[markand]

I've changed the way the bindings links to Lua (it shouldn't link to it) any issue should be fixed now (tested on mac and Linux).