CMake-based LuaJIT + Luarocks

What's the point?

We want to provide an easy to way to users for installing recent versions of LuaJIT (or Lua) and luarocks, with almost no efforts.

The provided LuaJIT (or Lua) and luarocks point on their respective git repository. We did not make any changes, except the compilation and installation process.

In addition,

• Luarocks (or Lua) will be installed at the same location than LuaJIT and will know about LuaJIT shared library location (mandatory for Windows installs). It will also not be confused if you have several LuaJIT+luarocks at different locations.

• Luarocks will come installed with Torch rocks repository.

• Luarocks comes with mandatory system command line tools under Windows.

• Readline support for LuaJIT.

• Experimental: Lua 5.1 with reference counting.

Pre-requisites

Install CMake on your system.

Get a C compiler. For Windows, we recommend the Windows SDK. It is free, it has no GUI, but it is just fine with CMake.

Installation

On Windows - use command prompt with appropritate environment (e.g. VS2013 Native Tools Command Prompt)

git clone https://github.com/diz-vara/luajit-rocks.git
cd luajit-rocks
mkdir build
cd build

Choose the destination - (e.g. d:/luainstall) - it will be '/your/prefix'

Then under Unix systems:

cmake .. -DCMAKE_INSTALL_PREFIX=/your/prefix
make install

Under Windows:

cmake .. -DCMAKE_INSTALL_PREFIX=/your/prefix -DWITH_LUAJIT21=ON -G "NMake Makefiles"  -DWIN32=1
nmake
cmake  -DCMAKE_INSTALL_PREFIX=/your/prefix -DWITH_LUAJIT21=ON -G "NMake Makefiles"  -DWIN32=1 -P cmake_install.cmake

Under Windows - remember to update your environment variables. Assuming that your/prefix is d:/luainstall :

set LUA_CPATH=d:\luainstall?.DLL;d:\luainstall\LIB\?.DLL;?.DLL
set LUA_DEV=d:/luainstall
set LUA_PATH=;;d:\luainstall\?;d:\luainstall\lua\?\init.lua;d:\luainstall\?.lua

Then install packages you need: luarocks install torch luarocks install nn luarocks install nnx etc...

Note: we do not recommend (nor we support) installation under Cygwin.

Additional CMake flags

• If you prefer vanilla Lua 5.1 instead of LuaJIT, use -DWITH_LUA51=ON
• If you prefer vanilla Lua 5.1 with reference counting instead of LuaJIT, use -DWITH_LUA51RC=ON (experimental)
• If you prefer vanilla Lua 5.2 instead of LuaJIT, use -DWITH_LUA52=ON
• If you prefer LuaJIT 2.1 instead of LuaJIT 2.0, use -DWITH_LUAJIT21=ON