1，安装mingw64
先下载mingw64压缩包(不建议下载exe安装包，在线安装太慢)，地址如下：
https://nchc.dl.sourceforge.net/project/mingw-w64/Toolchains%20targetting%20Win64/Personal%20Builds/mingw-builds/8.1.0/threads-posix/seh/x86_64-8.1.0-release-posix-seh-rt_v6-rev0.7z
下载之后解压到某路径，然后将其中的bin路径添加至系统path路径，例如E:\Program Files\mingw64\bin
检查是否安装成功：
C:\Users\cord>gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=E:/Program\ Files/mingw64/bin/../libexec/gcc/x86_64-w64-mingw32/8.1.0/lto-wrapper.exe
Target: x86_64-w64-mingw32
......
Thread model: posix
gcc version 8.1.0 (x86_64-posix-seh-rev0, Built by MinGW-W64 project)2，编译安装luajit
下载luajit：http://luajit.org/download/LuaJIT-2.1.0-beta3.zip
解压LuaJIT-2.1.0-beta3.zip并用cmd进入文件夹执行编译命令mingw32-make：
E:\>cd LuaJIT-2.1.0-beta3
E:\LuaJIT-2.1.0-beta3>mingw32-make
"==== Building LuaJIT 2.1.0-beta3 ===="
mingw32-make -C src
mingw32-make[1]: Entering directory 'E:/LuaJIT-2.1.0-beta3/src'
"HOSTCC host/minilua.o"
.......
"CC lj_lib.o"
"CC lj_alloc.o"
lj_alloc.c:154:14: warning: 'DIRECT_MMAP' defined but not used [-Wunused-function]
static void *DIRECT_MMAP(size_t size)
^~~~~~~~~~~
...
"CC lib_init.o"
"DYNLINK lua51.dll"
"CC luajit.o"
"BUILDVM jit/vmdef.lua"
"LINK luajit.exe"
"OK Successfully built LuaJIT"
mingw32-make[1]: Leaving directory 'E:/LuaJIT-2.1.0-beta3/src'
"==== Successfully built LuaJIT 2.1.0-beta3 ===="编译完成之后，将src下面的luajit.exe和lua51.dll两个文件拷贝到新建的E:/LuaJIT文件夹下面，并将src下面的jit文件夹拷贝到E:/LuaJIT/lua下面，整体目录结构如下：
E:\>tree /F luajit
卷 E 的文件夹 PATH 列表
卷序列号为 5EA5-2C1D
E:\LUAJIT
│ lua51.dll
│ luajit.exe
│
└─lua
└─jit
bc.lua
bcsave.lua
dis_arm.lua
dis_arm64.lua
dis_arm64be.lua
dis_mips.lua
dis_mips64.lua
dis_mips64el.lua
dis_mipsel.lua
dis_ppc.lua
dis_x64.lua
dis_x86.lua
dump.lua
p.lua
v.lua
vmdef.lua
zone.lua最后将E:/LuaJIT加入path路径。
检验安装结果：
C:\Users\cord>luajit -v
LuaJIT 2.1.0-beta3 -- Copyright (C) 2005-2017 Mike Pall. http://luajit.org/测试：
创建一个lua脚本test.lua
print("hello world")然后使用luajit进行编译生成bytecode ：
E:\Test\lua>luajit -b test.lua 1.lua会发现路径下生成了1.lua的文件
附：如果使用luajit的时候出现luajit: unknown luaJIT command or jit.* modules not installed的错误，说明lua模块放置的路径有问题，可以通过luajit -e "require('jit.bcsave')"命令测试一下luajit的模块搜索路径：
E:\Test\lua>luajit -e "require('jit.bcsave')"
luajit: (command line):1: module 'jit.bcsave' not found:
no field package.preload['jit.bcsave']
no file '.\jit\bcsave.lua'
no file 'E:\LuaJIT\lua\jit\bcsave.lua'
no file 'E:\LuaJIT\lua\jit\bcsave\init.lua'
no file '.\jit\bcsave.dll'
no file 'E:\LuaJIT\jit\bcsave.dll'
no file 'E:\LuaJIT\loadall.dll'
no file '.\jit.dll'
no file 'E:\LuaJIT\jit.dll'
no file 'E:\LuaJIT\loadall.dll'
stack traceback:
[C]: in function 'require'
(command line):1: in main chunk
[C]: at 0x00402060也就是安装后的jit文件夹最好放到编译包luajit.exe的同级包的lua文件夹下
参考链接：
https://tutel.me/c/programming/questions/44166483/luajit+on+windows+10+unknown+luajit+command+or+jit
https://blog.csdn.net/mydreamremindme/article/details/51372391