[SOLVED] Error using luasocket in Eclipse (Ubuntu 16.04)

Error using luasocket in Eclipse (Ubuntu 16.04)

I'm trying to use Lua 5.1 with luasocket in Eclipse Luna installed at Ubuntu 16.04.

I've already installed Lua 5.1 and LuaSocket 3.0-rc1 and I can run this program from command line (lua main.lua):

print(_VERSION)
print("Path: "..package.path..'\nCPATH: '..package.cpath)
socket = require("socket")
print(socket._VERSION)

and the result is:

$ lua main.lua
Lua 5.1
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;/usr/share/lua/5.1/?.lua;/usr/share/lua/5.1/?/init.lua
CPATH: ./?.so;/usr/local/lib/lua/5.1/?.so;/usr/lib/x86_64-linux-gnu/lua/5.1/?.so;/usr/lib/lua/5.1/?.so;/usr/local/lib/lua/5.1/loadall.so
LuaSocket 3.0-rc1

But when I try to run the same program using eclipse with lua plugin installed, I get this:

Lua 5.1
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;/usr/share/lua/5.1/?.lua;/usr/share/lua/5.1/?/init.lua;/media/meslin/16E65872E6585459/Users/meslin/Google Drive/workspace-desktop-ubuntu/Lua Alo Mundo/src/?.lua;/media/meslin/16E65872E6585459/Users/meslin/Google Drive/workspace-desktop-ubuntu/Lua Alo Mundo/src/?/init.lua;/media/meslin/16E65872E6585459/Users/meslin/Google Drive/workspace-desktop-ubuntu/Lua Alo Mundo/src/?.luac;/media/meslin/16E65872E6585459/Users/meslin/Google Drive/workspace-desktop-ubuntu/Lua Alo Mundo/src/?/init.luac;
CPATH: ./?.so;/usr/local/lib/lua/5.1/?.so;/usr/lib/lua/5.1/?.so;/usr/local/lib/lua/5.1/loadall.so
Exception in thread "main" com.naef.jnlua.LuaRuntimeException: error loading module 'socket.core' from file '/usr/local/lib/lua/5.1/socket/core.so':
/usr/local/lib/lua/5.1/socket/core.so: undefined symbol: lua_gettop
    at com.naef.jnlua.LuaState.lua_pcall(Native Method)
    at com.naef.jnlua.LuaState.call(LuaState.java:555)
    at org.eclipse.ldt.support.lua51.internal.interpreter.JNLua51Launcher.run(JNLua51Launcher.java:128)
    at org.eclipse.ldt.support.lua51.internal.interpreter.JNLua51Launcher.main(JNLua51Launcher.java:143)

Any ideas? Can you help me, please?

Thanks Alexandre

Solution

The same issue was discussed on the lua maillist some time ago, see if the recommendation there helps you:

By default, LDT ships with a built-in Lua VM (based on jnLua) so as anyone without even having to install Lua on its machine can start running Lua scripts real quick. I think that the way you've set the PATH and CPATH, the jnLua VM itself is not found anymore.

What you probably want is to configure a "local interpreter" for your local native VM. You can use [1] as a reference. Once you have the interpreter set up, you can launch the script against this interpreter instead of the embedded jnLua one by tweaking your launch configuration.