luasocket broken

[Simon-L]

[51.296 debug src/Lune.cpp:266 setScript] Loading /home/user/.Rack2/plugins/ModScript/scripts/myosc.lua
[51.296 debug src/Lune.cpp:285 setScript] Content:
config.frameDivider = 1
config.bufferSize = 8

buttonTrig = BooleanTrigger.new()

local socket = require("socket")
local udp = assert(socket.udp())
local data

udp:settimeout(1)

function process(block)
	if buttonTrig:process(block.button) then
		display(package.path)
		display(package.cpath)
	end
end

[51.300 warn src/LuaJITEngine.cpp:186 run] LuaJIT: 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
[51.300 debug src/LuaJITEngine.cpp:187 run] 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

Probably related: apache/trafficserver#5158

This calls for a more thorough build setup of LuaJIT and special care about the search paths as the Lua environment used in ModScript should be completely independent from the system. This is will be fixed along with upgrading the LuaJIT version used, including considering to switch to openresty's LuaJIT.

package.path: /home/user/.Rack2/plugins/ModScript/scripts/lib/?.lua;/home/user/.Rack2/plugins/ModScript/scripts/?.lua;/home/user/.Rack2/plugins/ModScript/scripts/lib/?/init.lua;./?.lua;/home/user/dev/ModScript/dep/share/luajit-2.0.5/?.lua;/usr/local/share/lua/5.1/?.lua;/usr/local/share/lua/5.1/?/init.lua;/home/user/dev/ModScript/dep/share/lua/5.1/?.lua;/home/user/dev/ModScript/dep/share/lua/5.1/?/init.lua
package.cpath: ./?.so;/usr/local/lib/lua/5.1/?.so;/home/user/dev/ModScript/dep/lib/lua/5.1/?.so;/usr/local/lib/lua/5.1/loadall.so

[Simon-L]

The upgrade to openresty/luajit2 is done but the path are not fixed yet.

The cause of this issue is this: because we're building and bundling LuaJIT statically, C modules like luasocket need to be linked against our static LuaJIT library. Doing that works fine on linux but sadly on Windows it is harder or impossible (?) or would require more changes to the build system. This issue will be left as is but once the paths are fixed it will just fail to load the module because it's simply not here.
Here is a minimal example of this setup, works on Linux only : mkdir dep && make dep && make
minimalcppluajit.zip