Quick Start

LuaJIT 快速开始

编译安装

# 下载解压
$ curl -R -O http://luajit.org/download/LuaJIT-2.0.5.tar.gz
$ tar zxvf LuaJIT-2.0.5.tar.gz

$ cd LuaJIT-2.0.5
# 查看文档
$ open doc/install.html

# Undefined symbols for architecture x86_64:
# ld: symbol(s) not found for architecture x86_64
$ vim src/Makefile
# BUILDMODE=mixed # 注释掉
BUILDMODE=dynamic # 打开此行


# 安装
$ sudo make install PREFIX=/usr/local/luajit

# 创建链接
$ ln -s /usr/local/luajit/bin/luajit-2.0.5 /usr/local/bin/luajit

$ luajit -h
usage: luajit [options]... [script [args]...].
Available options are:
  -e chunk  Execute string 'chunk'.
  -l name   Require library 'name'.
  -b ...    Save or list bytecode.
  -j cmd    Perform LuaJIT control command.
  -O[opt]   Control LuaJIT optimizations.
  -i        Enter interactive mode after executing 'script'.
  -v        Show version information.
  -E        Ignore environment variables.
  --        Stop handling options.
  -         Execute stdin and stop handling options.

luajit.lua

local ffi = require("ffi")

ffi.cdef [[
    int printf(const char *fmt, ...);
]]

ffi.C.printf("Hello %s!", "world")

运行

$ luajit luajit.lua 
Hello world!

# lua 方式运行，找不到 ffi 库
$ lua luajit.lua 
lua: luajit.lua:2: module 'ffi' not found:
        no field package.preload['ffi']
        ...

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