使用cmake編譯
編譯資料夾在opencv安裝資料夾下，名字是release
d:\opencv\sources\3rdparty\protobuf\src\google\protobuf\stubs\io_win32.cc:94:3: warning: identifier 'nullptr' is a keyword in c++11 [-wc++0x-compat]
return s == nullptr || *s == 0;
^d:\opencv\sources\3rdparty\protobuf\src\google\protobuf\stubs\io_win32.cc: in function 'bool google::protobuf::internal::win32::::null_or_empty(const char_type*)':
d:\opencv\sources\3rdparty\protobuf\src\google\protobuf\stubs\io_win32.cc:94:15: error: 'nullptr' was not declared in this scope
return s == nullptr || *s == 0;
^3rdparty\protobuf\cmakefiles\libprotobuf.dir\build.make:412: recipe for target '3rdparty/protobuf/cmakefiles/libprotobuf.dir/src/google/protobuf/stubs/io_win32.cc.obj' failed
mingw32-make[2]: *** [3rdparty/protobuf/cmakefiles/libprotobuf.dir/src/google/protobuf/stubs/io_win32.cc.obj] error 1
cmakefiles\makefile2:710: recipe for target '3rdparty/protobuf/cmakefiles/libprotobuf.dir/all' failed
mingw32-make[1]: *** [3rdparty/protobuf/cmakefiles/libprotobuf.dir/all] error 2
makefile:161: recipe for target 'all' failed
mingw32-make: *** [all] error 2
勾選enable_cxx11
然後重新configure-generate-mingw32-make
makefile:161: recipe for target 'all' failed
mingw32-make: *** [all] error 2
d:\opencv\sources\modules\videoio\src\cap_dshow.cpp檔案，在#include "dshow.h"這行的上面加一行#define no_dshow_strsafe
然後重新configure-generate-mingw32-make
d:\opencv\sources\3rdparty\protobuf\src\google\protobuf\stubs\io_win32.cc: in function 'file* google::protobuf::internal::win32::fopen(const char*, const char*)':
d:\opencv\sources\3rdparty\protobuf\src\google\protobuf\stubs\io_win32.cc:330:10: error: '::_wfopen' has not been declared
return ::_wfopen(wpath.c_str(), wmode.c_str());
^3rdparty\protobuf\cmakefiles\libprotobuf.dir\build.make:258: recipe for target '3rdparty/protobuf/cmakefiles/libprotobuf.dir/src/google/protobuf/stubs/io_win32.cc.obj' failed
mingw32-make[2]: *** [3rdparty/protobuf/cmakefiles/libprotobuf.dir/src/google/protobuf/stubs/io_win32.cc.obj] error 1
cmakefiles\makefile2:687: recipe for target '3rdparty/protobuf/cmakefiles/libprotobuf.dir/all' failed
mingw32-make[1]: *** [3rdparty/protobuf/cmakefiles/libprotobuf.dir/all] error 2
makefile:161: recipe for target 'all' failed
mingw32-make: *** [all] error 2
注意一定不要重新configure-generate！！做了這步操作之後cmakecache.txt又會重新生成。直接mingw32-make
********************=使用qt時pro檔案需要新增的*****************=
includepath+=d:\opencv\build\include
libs+=-l d:\opencv\release\lib\libopencv_*.a
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