nginx 1.3.6 编译报错 [-Werror=unused-but-set-variable]的解决

遇到类似 [-Werror=unused-but-set-variable]的错误：

/home/zhangbin/mserver/nginx/nginx_mod_h264_streaming-2.2.7/src/mp4_reader.c:529:22: error: variable ‘level_indication’ set but not used [-Werror=unused-but-set-variable]

/home/zhangbin/mserver/nginx/nginx_mod_h264_streaming-2.2.7/src/mp4_reader.c:528:22: error: variable ‘ profile_compatibility’ set but not used [-Werror=unused-but-set-variable]

/home/zhangbin/mserver/nginx/nginx_mod_h264_streaming-2.2.7/src/mp4_reader.c:527:22: error: variable ‘ profile_indication’ set but not used  [-Werror=unused-but-set-variable]

/home/zhangbin/mserver/nginx/nginx_mod_h264_streaming-2.2.7/src/ mp4_reader.c:526:22: error: variable ‘ configuration_version’ set but not used  [-Werror=unused-but-set-variable]

cc1: all warnings being treated as errors

make[2]: *** [objs/addon/src/mp4_reader.o] Error 1

make[2]: Leaving directory `/home/zhangbin/mserver/nginx/nginx-1.3.6'

make[1]: *** [build] Error 2

make[1]: Leaving directory `/home/zhangbin/mserver/nginx/nginx-1.3.6'

make: *** [all] Error 2

root@ubuntu:/home/zhangbin/mserver/nginx/nginx_mod_h264_streaming-2.2.7# 

直接修改nginx_mod_h264_streaming-2.2.7/的Makefile，没看到Werror啊。

Makefile是：

all:
cd $(NGINX) && ./configure --sbin-path=/usr/local/sbin --add-module=$(PWD) --with-debug --with-http_flv_module
make --directory=$(NGINX)

CONFIG里有CFLAGS：

CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -DBUILDING_NGINX"

Makefile会去读CONFIG么？

nginx的Makefile：

default: build


clean:
rm -rf Makefile objs


build:
$(MAKE) -f objs/Makefile
$(MAKE) -f objs/Makefile manpage

objs的Makefile：

CC = gcc
CFLAGS =  -pipe  -O -W -Wall -Wpointer-arith -Wno-unused-parameter -Werror -g  -D_LARGEFILE_SOURCE -DBUILDING_NGINX
CPP = gcc -E
LINK = $(CC)

ALL_INCS = -I src/core \
-I src/event \
-I src/event/modules \
-I src/os/unix \
-I objs \
-I src/http \
-I src/http/modules \
-I src/mail

去掉Werror就可以了。

实际使用的编译指令是：

objs/addon/src/mp4_reader.o: $(ADDON_DEPS) \
/home/zhangbin/mserver/nginx/nginx_mod_h264_streaming-2.2.7/src/mp4_reader.c
$(CC) -c $(CFLAGS)  $(ALL_INCS) \
-o objs/addon/src/mp4_reader.o \
/home/zhangbin/mserver/nginx/nginx_mod_h264_streaming-2.2.7/src/mp4_reader.c

所以264_mod的编译是nginx的Makefile控制的，与264内部自带的Makefile无关。