opencv 2.4.x 编译时 freak.cpp:437: error: unable to find a register to spill in class 'GENERAL_REGS'
2013-08-01 16:09
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opencv 2.4.x 编译时，出现的 freak.cpp:437: error: unable to find a register to spillin class 'GENERAL_REGS'错误。而换一个机器却有可以。其原因与gcc的版本有关。解决方案：1.升级你的gcc版本；2.更改编译条件：进入cmake之后的文件夹，打开文件
modules/features2d/CMakeFiles/opencv_features2d.dir/build.make
查找freak，会发现
在Building CxX 之后
红色区域：（CXX_FLAGS） 之后加上 -O0 (大写字母O和数字0)
然后再make，就可以了
参考：http://www.pressingquestion.com/3967025/Error-In-Making-Opencv
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