C:opencvbuildx64mingw>mingw32-make
[  2%] Built target zlib
[  5%] Built target libjpeg-turbo
[  8%] Built target libtiff
[ 15%] Built target libwebp
[ 17%] Built target libjasper
[ 18%] Built target libpng
[ 22%] Built target IlmImf
[ 27%] Built target libprotobuf
[ 27%] Built target quirc
[ 29%] Built target ade
[ 29%] Built target opencv_videoio_plugins
[ 29%] Building CXX object modules/core/CMakeFiles/opencv_core_pch_dephelp.dir/opencv_core_pch_dephelp.cxx.obj
In file included from C:/opencv/sources/modules/core/src/precomp.hpp:49,
                 from C:opencvbuildx64mingwmodulescoreopencv_core_pch_dephelp.cxx:1:
C:/opencv/sources/modules/core/include/opencv2/core/utility.hpp:696:14: error: 'recursive_mutex' in namespace 'std' does not name a type
 typedef std::recursive_mutex Mutex;
              ^~~~~~~~~~~~~~~
C:/opencv/sources/modules/core/include/opencv2/core/utility.hpp:696:9: note: 'std::recursive_mutex' is defined in header '<mutex>'; did you forget to '#include <mutex>'?
C:/opencv/sources/modules/core/include/opencv2/core/utility.hpp:62:1:
+#include <mutex>
 #endif
C:/opencv/sources/modules/core/include/opencv2/core/utility.hpp:696:9:
 typedef std::recursive_mutex Mutex;
         ^~~
C:/opencv/sources/modules/core/include/opencv2/core/utility.hpp:697:29: error: 'Mutex' is not a member of 'cv'
 typedef std::lock_guard<cv::Mutex> AutoLock;
                             ^~~~~
C:/opencv/sources/modules/core/include/opencv2/core/utility.hpp:697:29: note: suggested alternative: 'Matx'
 typedef std::lock_guard<cv::Mutex> AutoLock;
                             ^~~~~
                             Matx
C:/opencv/sources/modules/core/include/opencv2/core/utility.hpp:697:29: error: 'Mutex' is not a member of 'cv'
C:/opencv/sources/modules/core/include/opencv2/core/utility.hpp:697:29: note: suggested alternative: 'Matx'
 typedef std::lock_guard<cv::Mutex> AutoLock;
                             ^~~~~
                             Matx
C:/opencv/sources/modules/core/include/opencv2/core/utility.hpp:697:34: error: template argument 1 is invalid
 typedef std::lock_guard<cv::Mutex> AutoLock;
                                  ^
In file included from C:opencvbuildx64mingwmodulescoreopencv_core_pch_dephelp.cxx:1:
C:/opencv/sources/modules/core/src/precomp.hpp:365:5: error: 'Mutex' in namespace 'cv' does not name a type
 cv::Mutex& getInitializationMutex();
     ^~~~~
C:/opencv/sources/modules/core/src/precomp.hpp:365:1: note: suggested alternative: 'Matx'
 cv::Mutex& getInitializationMutex();
 ^~
 Matx
modulescoreCMakeFilesopencv_core_pch_dephelp.dirbuild.make:62: recipe for target 'modules/core/CMakeFiles/opencv_core_pch_dephelp.dir/opencv_core_pch_dephelp.cxx.obj' failed
mingw32-make[2]: *** [modules/core/CMakeFiles/opencv_core_pch_dephelp.dir/opencv_core_pch_dephelp.cxx.obj] Error 1
CMakeFilesMakefile2:1400: recipe for target 'modules/core/CMakeFiles/opencv_core_pch_dephelp.dir/all' failed
mingw32-make[1]: *** [modules/core/CMakeFiles/opencv_core_pch_dephelp.dir/all] Error 2
Makefile:161: recipe for target 'all' failed
mingw32-make: *** [all] Error 2