nginx编译报错src/core/ngx_murmurhash.c:37:11: 错误：this statement may fall through [-Werror=implicit-fallthrough=] h ^= data[2]

make -f objs/Makefile
make[1]: 进入目录“/opt/nginx-1.8.1”
cc -c -pipe  -O -W -Wall -Wpointer-arith -Wno-unused -Werror -g  -I src/core -I src/event -I src/event/modules -I src/os/unix -I objs \
        -o objs/src/core/ngx_murmurhash.o \
        src/core/ngx_murmurhash.c
src/core/ngx_murmurhash.c: 在函数‘ngx_murmur_hash2’中:
src/core/ngx_murmurhash.c:37:11: 错误：this statement may fall through [-Werror=implicit-fallthrough=]
         h ^= data[2] << 16;
         ~~^~~~~~~~~~~~~~~~
src/core/ngx_murmurhash.c:38:5: 附注：here
     case 2:
     ^~~~
src/core/ngx_murmurhash.c:39:11: 错误：this statement may fall through [-Werror=implicit-fallthrough=]
         h ^= data[1] << 8;
         ~~^~~~~~~~~~~~~~~
src/core/ngx_murmurhash.c:40:5: 附注：here
     case 1:
     ^~~~
cc1：所有的警告都被当作是错误
make[1]: *** [objs/Makefile:431：objs/src/core/ngx_murmurhash.o] 错误 1
make[1]: 离开目录“/opt/nginx-1.8.1”
make: *** [Makefile:8：build] 错误 2

原因：将警告当成错误处理

解决错误1：进入到nginx-1.6.3目录下（解压的目录）

找到当前目录下找到objs文件夹，并进入，打开文件Makefile,找到有一下内容的这行：

[root@lnmp nginx-1.8.1]# vim objs/Makefile
CFLAGS =  -pipe  -O -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g　

-Werror: gcc将所有的警告当成错误进行处理把这行内容中的 “-Werror”去掉