【一】Nginx的编译

前言

Nginx作为一款高性能web服务器软件，应用广泛，最近学习源码，一探究原理和优秀的设计，用一个软件那就从最基础的编译开始吧。

预备编译

首先下载Nginx源码，官网，我下载的是nginx/1.10.3。
Nginx安装也需要依赖库：gzip需要zlib库，rewrite需要pcre库，ssl需要opensll库。

ubuntu下

apt-get install openssl libssl-dev ibpcre3 libpcre3-dev zlib1g-dev 

编译

运行编译help命令

./configure --help

 --help                             print this message

  --prefix=PATH                      set installation prefix
  --sbin-path=PATH                   set nginx binary pathname
  --modules-path=PATH                set modules path
  --conf-path=PATH                   set nginx.conf pathname
  --error-log-path=PATH              set error log pathname
  --pid-path=PATH                    set nginx.pid pathname
  --lock-path=PATH                   set nginx.lock pathname

  --user=USER                        set non-privileged user for
                                     worker processes
  --group=GROUP                      set non-privileged group for
                                     worker processes
...

这很长的就是编译参数，根据编译参数能自定义安装模块和路径。

编译命令

./configure --add-module=/opt/app/nginx-1.10.3/addon/echo1 \
    --add-module=/opt/app/nginx-1.10.3/addon/echo2 \
    --add-module=/opt/app/nginx-1.10.3/addon/hello \
    --add-module=/opt/app/nginx-1.10.3/addon/my1 \
    --user=nginx \
    --group=nginx

编译命令可以写很多，根据自己的需要来。

接下就是make && make install

事项点

make时可能会出现如下警告而退出make

src/http/ngx_http_parse.c: In function 'ngx_http_parse_complex_uri':
src/http/ngx_http_parse.c:1384:32: warning: this statement may fall through [-Wimplicit-fallthrough=]
 1384 |                 r->plus_in_uri = 1;
      |                 ~~~~~~~~~~~~~~~^~~
src/http/ngx_http_parse.c:1385:13: note: here
 1385 |             default:
      |             ^~~~~~~
src/http/ngx_http_parse.c:1425:32: warning: this statement may fall through [-Wimplicit-fallthrough=]
 1425 |                 r->plus_in_uri = 1;
      |                 ~~~~~~~~~~~~~~~^~~
src/http/ngx_http_parse.c:1426:13: note: here
 1426 |             default:
      |             ^~~~~~~
src/http/ngx_http_parse.c:1472:32: warning: this statement may fall through [-Wimplicit-fallthrough=]
 1472 |                 r->plus_in_uri = 1;
      |                 ~~~~~~~~~~~~~~~^~~

解决办法：在目录auto/gcc文件下找到174-178行删除-Werror

# stop on warning
CFLAGS="$CFLAGS -Werror"

# debug
CFLAGS="$CFLAGS -g"