g++ 6.3编译opencv-2.48报错记录

fetch公司的项目进行编译，此项目依赖opencv库。因为本人一直比较偏心fedora，但也所以给我带来了许多"乐趣"(麻烦)。fedora一直走得比较前沿，g++ 6.3了，因而在编译的过程当中遇到了一些错误，在此记录一下：

/home/hiscene/Downloads/opencv-2.4.8.3/modules/contrib/src/chamfermatching.cpp:969:30: error: the compiler can assume that the address of ‘annotate_img’ will never be NULL [-Werror=address]
             if (&annotate_img!=NULL) {
                              ^
/home/hiscene/Downloads/opencv-2.4.8.3/modules/contrib/src/chamfermatching.cpp:1016:34: error: the compiler can assume that the address of ‘annotate_img’ will never be NULL [-Werror=address]
                 if (&annotate_img!=NULL) {
                                  ^
/home/hiscene/Downloads/opencv-2.4.8.3/modules/contrib/src/chamfermatching.cpp: In member function ‘cv::ChamferMatcher::Match* cv::ChamferMatcher::Matching::localChamferDistance(cv::Point, cv::Mat&, cv::Mat&, cv::ChamferMatcher::Template*, float)’:
/home/hiscene/Downloads/opencv-2.4.8.3/modules/contrib/src/chamfermatching.cpp:1111:25: error: the compiler can assume that the address of ‘orientation_img’ will never be NULL [-Werror=address]

 

在网上搜罗了一些答案：

cc1: warnings being treated as errors

AM_CFLAGS = -Wall -g $(MATCHBOX_PANEL_CFLAGS) \
        -I$(top_srcdir) -I$(top_builddir) -Werror

说是把 -Werror 去掉

可是opencv是依赖cmake编译的，因而根据报错信息进入到了相应的目录，在flags.make文件里面找到了-Werror=address，将其去掉，而后保存，从新编译后就成功了。