luajit——luajit源码安装——编译运行lua

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1、源码安装luajit

下载luajit源码 http://luajit.org/download.html

git clone https://luajit.org/git/luajit.git

a. 以 LuaJIT-2.1.0-beta3.tar.gz 为例，下载解压后进入 LuaJIT-2.1.0-beta3目录

make

make install

这样会把luajit安装到系统目录， /usr/local下

b. 若需指定安装目录，需在执行 make install 之前，修改Makefile文件

Makefile中的安装路径
#export PREFIX= /usr/local
DIR=$(shell pwd)
export PREFIX=$(DIR)/build
export MULTILIB= lib

便可安装到与Makefile文件同目录的build文件夹下。

2、编译运行lua

编译lua    luajit -b test.lua test.luac

执行luac   luajit test.luac

报错处理：

luajit -b 编译报错： ./luajit: unknown luaJIT command or jit.* modules not installed

解决办法：

无论编译好的 luajit 命令在什么目录，

当前执行 "luajit -b 源文件编译文件" 的目录下，必须存在jit文件夹，jit文件夹在luajit源码的src文件夹。

错误重现

bogon:bin chong$ ls -ls
total 1104
   8 lrwxr-xr-x  1 chong  staff      18 13 Gen 11:32 luajit -> luajit-2.1.0-beta3
1096 -rwxr-xr-x  1 chong  staff  559796 13 Gen 11:30 luajit-2.1.0-beta3
bogon:bin chong$ 
bogon:bin chong$ ./luajit -b ../../../test.lua ../../../test.luac
./luajit: unknown luaJIT command or jit.* modules not installed
bogon:bin chong$

进入到包含jit文件夹的目录，可以正确编译

bogon:build chong$ ls -ls
total 0
0 drwxr-xr-x   4 chong  staff  136 13 Gen 12:18 bin
0 drwxr-xr-x   3 chong  staff  102 13 Gen 11:30 include
0 drwxr-xr-x  19 chong  staff  646 13 Gen 11:57 jit
0 drwxr-xr-x   8 chong  staff  272 13 Gen 11:30 lib
0 drwxr-xr-x   5 chong  staff  170 13 Gen 11:30 share
bogon:build chong$ 
bogon:build chong$ bin/luajit -b ../../test.lua  ../../test.luac
bogon:build chong$ 
bogon:build chong$

3、直接执行lua的示例

test.lua代码

print("hi ... ")

直接执行

bogon:c chong$ LuaJIT/build/bin/luajit test.lua 
hi ... 
bogon:c chong$

4、lua 读写文件

function Reader:saveJson()
    for tableName, v in pairs(configs) do
        self:getDataTable(tableName)
        local content = json.encode(self._Tables[tableName])
        local outpath = "/Users/json_out/"
        --local content = "i am temp..."
        local file = io.open(outpath..tableName..".json", "w");
        file:write(content);
        file:close();
    end
    print("ok")
end