我正在尝试集成新的 Opencv3.3rc 标签以使用 OpenCV dnn 模块。 https://github.com/opencv/opencv/tree/3.3.0-rc
我可以交叉编译 OpenCV 库,但是当我尝试使 FindOpencv 成为必需时,出现此错误:
Some (but not all) targets in this export set where already defined.
如您所见,注册的唯一目标是 cpufeatures:
Targets Defined: cpufeatures
Targets not yet defined:
libtiff;libjpeg;libwebp;libjasper;libpng;IlmImf;tegra_hal;libprotobuf;opencv_core;opencv_flann;opencv_imgproc;opencv_ml;opencv_objdetect;opencv_photo;opencv_video;opencv_dnn;opencv_imgcodecs;opencv_shape;opencv_videoio;opencv_highgui;opencv_superres;opencv_features2d;opencv_calib3d;opencv_java;opencv_stitching;opencv_videostab
正如我在OpenCVconfig.cmake配置文件中看到的,目前有两种方法可以找到OpenCV:
这个:
find_package(OpenCV REQUIRED)
或定义模块:
find_package(OpenCV REQUIRED core videoio)
但它们都不起作用。
错误来自这个片段 OpenCVModules.cmake
# Commands may need to know the format version.
set(CMAKE_IMPORT_FILE_VERSION 1)
# Protect against multiple inclusion, which would fail when already imported targets are added once more.
set(_targetsDefined)
set(_targetsNotDefined)
set(_expectedTargets)
foreach(_expectedTarget cpufeatures libtiff libjpeg libwebp libjasper libpng IlmImf tegra_hal libprotobuf opencv_core opencv_flann opencv_imgproc opencv_ml opencv_objdetect opencv_photo opencv_video opencv_dnn opencv_imgcodecs opencv_shape opencv_videoio opencv_highgui opencv_superres opencv_features2d opencv_calib3d opencv_java opencv_stitching opencv_videostab)
list(APPEND _expectedTargets ${_expectedTarget})
if(NOT TARGET ${_expectedTarget})
list(APPEND _targetsNotDefined ${_expectedTarget})
endif()
if(TARGET ${_expectedTarget})
list(APPEND _targetsDefined ${_expectedTarget})
endif()
endforeach()
if("${_targetsDefined}" STREQUAL "${_expectedTargets}")
unset(_targetsDefined)
unset(_targetsNotDefined)
unset(_expectedTargets)
set(CMAKE_IMPORT_FILE_VERSION)
cmake_policy(POP)
return()
endif()
if(NOT "${_targetsDefined}" STREQUAL "")
message(FATAL_ERROR "Some (but not all) targets in this export set were already defined.\nTargets Defined: ${_targetsDefined}\nTargets not yet defined: ${_targetsNotDefined}\n")
endif()
有人知道这是怎么发生的吗?
最佳答案
我找到了答案:
我之前定义了cpu-features库,所以这段代码是CMakelists.txt中的冲突部分。
add_library(cpufeatures STATIC
${ANDROID_NDK}/sources/android/cpufeatures/cpu-features.c)
去掉这部分,问题解决。
关于opencv - 无法在 opencv 3.3rc 上为 android : 制作 find_package(Opencv),我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/45074861/