最近升级nginx版本为 0.8.41 在make时提示如下警告：
objs/src/os/unix/ngx_process.o: In function `ngx_process_get_status':
/data/soft/nginx-0.8.42/src/os/unix/ngx_process.c:490: warning:
`sys_errlist' is deprecated; use `strerror' or `strerror_r' instead
/data/soft/nginx-0.8.42/src/os/unix/ngx_process.c:490: warning:
`sys_nerr' is deprecated; use `strerror' or `strerror_r' instead
根据其官方描述，这属于正常现象，没有替换废弃的函数是因为新的为非异步信号安全的函数。
以下为官方说明：
While building nginx version 0.7.66, 0.8.35 or higher on Linux the following warning messages are issued:
warning: `sys_errlist' is deprecated;
use `strerror' or `strerror_r' instead
warning: `sys_nerr' is deprecated;
use `strerror' or `strerror_r' instead
This is normal: nginx has to use the deprecated sys_errlist[] and sys_nerr in signal handlers because strerror() and strerror_r() functions are not Async-Signal-Safe.