checking for LuaJIT 2.x ... not found ./configure: error: unsupported LuaJIT version; ngx_http_lua_module requires LuaJIT 2.x.

这个错误是因为需要安装 LuaJIT 2.x。以下是安装步骤

1. 首先安装必要的编译工具和依赖

Ubuntu/Debian：

apt-get install build-essential

CentOS 9 ：

# 安装开发工具组
dnf groupinstall "Development Tools"

# 安装必要的依赖
dnf install pcre-devel zlib-devel openssl-devel gcc make \
    perl-IPC-Cmd perl-Getopt-Long perl-Data-Dumper \
    luajit-devel luajit

2.设置环境变量

# 设置 LuaJIT 路径
export LUAJIT_LIB=/usr/lib64
export LUAJIT_INC=/usr/include/luajit-2.1

# 添加到系统配置文件以持久化
echo "export LUAJIT_LIB=/usr/lib64" >> /etc/profile.d/luajit.sh
echo "export LUAJIT_INC=/usr/include/luajit-2.1" >> /etc/profile.d/luajit.sh
source /etc/profile

3. 重新配置 Nginx/Tengine

./configure \
--prefix=/usr/local/nginx \
--user=www \
--group=www \
--with-http_ssl_module \
--with-http_v2_module \
--with-http_flv_module \
--with-http_stub_status_module \
--with-http_gzip_static_module \
--with-pcre \
--with-http_realip_module \
--with-http_gunzip_module \
--with-http_secure_link_module \
--with-stream \
--with-stream_ssl_module \
--with-stream_sni \
--with-syslog \
--with-ld-opt="-Wl,-rpath,/usr/lib64" \
--with-luajit-lib=/usr/lib64 \
--with-luajit-inc=/usr/include/luajit-2.1

如果还是不成功，可以尝试手动编译 LuaJIT

# 下载并解压 LuaJIT
cd /usr/local/src
wget https://github.com/openresty/luajit2/archive/refs/tags/v2.1-20231117.tar.gz
tar -zxf v2.1-20231117.tar.gz
cd luajit2-2.1-20231117

# 编译安装
make
make install PREFIX=/usr

# 更新系统库缓存
ldconfig

然后重新设置环境变量并配置 Tengine。

如果仍然遇到问题，可以检查：

1. 验证 LuaJIT 安装：

   
   # 检查 LuaJIT 版本
   luajit -v

2. 检查库文件
   ls -l /usr/lib64/libluajit*
   ls -l /usr/include/luajit-2.1/

3. 检查环境变量：

   echo $LUAJIT_LIB
   echo $LUAJIT_INC

4. 如果出现其他错误，可以查看配置日志：

   cat objs/autoconf.err