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Merge remote-tracking branch 'origin/2.4' into merge-2.4
Conflicts: cmake/OpenCVModule.cmake doc/tutorials/calib3d/camera_calibration/camera_calibration.rst doc/tutorials/features2d/feature_detection/feature_detection.rst doc/tutorials/features2d/feature_flann_matcher/feature_flann_matcher.rst doc/tutorials/features2d/feature_homography/feature_homography.rst modules/core/include/opencv2/core/operations.hpp modules/core/src/arithm.cpp modules/gpu/perf/perf_video.cpp modules/imgproc/include/opencv2/imgproc/imgproc.hpp modules/java/generator/gen_java.py modules/java/generator/src/cpp/VideoCapture.cpp modules/nonfree/src/opencl/surf.cl modules/ocl/include/opencv2/ocl/ocl.hpp modules/ocl/perf/perf_haar.cpp modules/ocl/perf/perf_precomp.hpp modules/ocl/src/color.cpp modules/ocl/src/filtering.cpp modules/ocl/test/test_color.cpp modules/ocl/test/test_objdetect.cpp modules/python/src2/cv2.cpp samples/gpu/CMakeLists.txt samples/gpu/super_resolution.cpp
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@@ -279,12 +279,9 @@ ENDMACRO(ADD_PRECOMPILED_HEADER)
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MACRO(GET_NATIVE_PRECOMPILED_HEADER _targetName _input)
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if(CMAKE_GENERATOR MATCHES "^Visual.*$")
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SET(_dummy_str "#include \"${_input}\"\n"
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"// This is required to suppress LNK4221. Very annoying.\n"
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"void *g_${_targetName}Dummy = 0\;\n")
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set(_dummy_str "#include \"${_input}\"\n")
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# Use of cxx extension for generated files (as Qt does)
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SET(${_targetName}_pch ${CMAKE_CURRENT_BINARY_DIR}/${_targetName}_pch.cxx)
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set(${_targetName}_pch ${CMAKE_CURRENT_BINARY_DIR}/${_targetName}_pch.cpp)
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if(EXISTS ${${_targetName}_pch})
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# Check if contents is the same, if not rewrite
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# todo
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@@ -344,11 +341,7 @@ ENDMACRO(ADD_NATIVE_PRECOMPILED_HEADER)
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macro(ocv_add_precompiled_header_to_target the_target pch_header)
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if(PCHSupport_FOUND AND ENABLE_PRECOMPILED_HEADERS AND EXISTS "${pch_header}")
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if(CMAKE_GENERATOR MATCHES Visual)
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string(REGEX REPLACE "hpp$" "cpp" ${the_target}_pch "${pch_header}")
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add_native_precompiled_header(${the_target} ${pch_header})
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unset(${the_target}_pch)
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elseif(CMAKE_GENERATOR MATCHES Xcode)
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if(CMAKE_GENERATOR MATCHES "^Visual" OR CMAKE_GENERATOR MATCHES Xcode)
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add_native_precompiled_header(${the_target} ${pch_header})
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elseif(CMAKE_COMPILER_IS_GNUCXX AND CMAKE_GENERATOR MATCHES "Makefiles|Ninja")
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add_precompiled_header(${the_target} ${pch_header})
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