nginx报错：src/core/ngx_murmurhash.c:39:11: error: this statement may fall through [-Werror=implicit-fa

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本文详细描述了在编译Nginx过程中遇到的错误，特别是与ngx_murmurhash.c文件中ngx_murmur_hash2函数有关的警告被视为错误的问题。通过去除Makefile中的-Werror选项，成功解决了编译失败的情况。

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报错：

make -f objs/Makefile install
make[1]: Entering directory '/usr/local/nginx/nginx-1.7.7'
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: In function ‘ngx_murmur_hash2’:
src/core/ngx_murmurhash.c:37:11: error: this statement may fall through [-Werror=implicit-fallthrough=]
h ^= data[2] << 16;
~~^~~~~~~~~~~~~~~~
src/core/ngx_murmurhash.c:38:5: note: here
case 2:
^~~~
src/core/ngx_murmurhash.c:39:11: error: this statement may fall through [-Werror=implicit-fallthrough=]
h ^= data[1] << 8;
~~^~~~~~~~~~~~~~~
src/core/ngx_murmurhash.c:40:5: note: here
case 1:
^~~~
cc1: all warnings being treated as errors
objs/Makefile:439: recipe for target 'objs/src/core/ngx_murmurhash.o' failed
make[1]: *** [objs/src/core/ngx_murmurhash.o] Error 1
make[1]: Leaving directory '/usr/local/nginx/nginx-1.7.7'
Makefile:12: recipe for target 'install' failed
make: *** [install] Error 2

解决：

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：

	
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