问题[nginx]记录：Nginx1.9.9版本 安装出现In function ngx_murmur_hash2 报错

配置

os: centos 7
nginx-version: 1.9.9
libs:  gcc gcc-g++
       pcre pcre-devel
       zlib zlib-devel
       openssl openssl-devel

问题1

src/core/ngx_murmurhash.c: In function ‘ngx_murmur_hash2’:
src/core/ngx_murmurhash.c:37:11: error: this statement may fall through [-Werror=implicit-fallthrough=]
   37 |         h ^= data[2] << 16;
      |         ~~^~~~~~~~~~~~~~~~
src/core/ngx_murmurhash.c:38:5: note: here
   38 |     case 2:
      |     ^~~~
src/core/ngx_murmurhash.c:39:11: error: this statement may fall through [-Werror=implicit-fallthrough=]
   39 |         h ^= data[1] << 8;
      |         ~~^~~~~~~~~~~~~~~
src/core/ngx_murmurhash.c:40:5: note: here
   40 |     case 1:
      |     ^~~~
cc1: all warnings being treated as errors
make[1]: *** [objs/Makefile:445: objs/src/core/ngx_murmurhash.o] Error 1
make[1]: Leaving directory '/home/xing/application/nginx-1.9.9'
make: *** [Makefile:8: build] Error 2

该问题是因为设定的编译警告，讲编译警告作为错误输出，并终止编译

解决方案

进入 nginx/jobs/Makefile 找到CFLAGS并删除其中的-Werror

CFLAGS =  -pipe  -O -W -Wall -Wpointer-arith -Wno-unused -Werror -g

问题2

src/os/unix/ngx_user.c: In function ‘ngx_libc_crypt’:
src/os/unix/ngx_user.c:36:7: error: ‘struct crypt_data’ has no member named ‘current_salt’
   36 |     cd.current_salt[0] = ~salt[0];
      |       ^
make[1]: *** [objs/Makefile:732: objs/src/os/unix/ngx_user.o] Error 1
make[1]: Leaving directory '/home/xing/application/nginx-1.9.9'
make: *** [Makefile:8: build] Error 2

该问题是因为glibc引起的错误，我们需要进入 objs/src/os/unix/ngx_user.c找到并删除 cd.current_salt[0] = ~salt[0];

#ifdef __GLIBC__
    /* work around the glibc bug */
    cd.current_salt[0] = ~salt[0];
#endif

后记

官方于1.14.2版本中删除了这个由glibc引起的错误

总结

nginx尽量使用较新版本，能使用稳定版就使用稳定版，这样可以避免很多麻烦和问题。