使用cmake导入opencv c++文件时出错

Question

opencv 已在我的项目中设置，但导入的 c++ 文件出错

FAILURE: Build failed with an exception.

• 出了什么问题： 任务“:app:externalNativeBuildDebug”执行失败。

构建命令失败。 执行进程 C:\src\Android\Sdk\cmake\3.10.2.4988404\bin\ninja.exe 时出错，参数为 {-CC:\Users\azad prajapat\AndroidStudioProjects\sunscape\sunscape\android\app.cxx\cmake\调试\armeabi-v7a 本机全景} ninja: 进入目录`C:\Users\azad prajapat\AndroidStudioProjects\sunscape\sunscape\android\app.cxx\cmake\debug\armeabi-v7a' [1/2] 构建CXX对象CMakeFiles/native-panorama.dir/src/main/jni/com_example_sunscape_NativePanorama.cpp.o 失败：CMakeFiles/native-panorama.dir/src/main/jni/com_example_sunscape_NativePanorama.cpp.o C:\src\Android\Sdk\ndk\22.0.7026061\toolchains\llvm\prebuilt\windows-x86_64\bin\clang++.exe --target=armv7-none-linux-androideabi24 --gcc-toolchain=C:/ src/Android/Sdk/ndk/22.0.7026061/toolchains/llvm/prebuilt/windows-x86_64 --sysroot=C:/src/Android/Sdk/ndk/22.0.7026061/toolchains/llvm/prebuilt/windows-x86_64/ sysroot -Dnative_panorama_EXPORTS -I../../../../src/main/jniIncludes -g -DANDROID -fdata-sections -ffunction-sections -funwind-tables -fstack-protector-strong -no-canonical-prefixes -D_FORTIFY_SOURCE=2 -march=armv7-a -mthumb -Wformat -Werror=format-security -std=gnu++11 -Wno-error=format-security -frtti -fexceptions -stdlib=libstdc++ -O0 -fPIC -MD - MT CMakeFiles/native-panorama.dir/src/main/jni/com_example_sunscape_NativePanorama.cpp.o -MF CMakeFiles\native-panorama.dir\src\main\jni\com_example_sunscape_NativePanorama.cpp.od -o CMakeFiles/native-panorama.dir /src/main/jni/com_example_sunscape_NativePanorama.cpp.o -c ../../../../src/main/jni/com_example_sunscape_NativePanorama.cp p 在 ../../../../src/main/jni/com_example_sunscape_NativePanorama.cpp:3 包含的文件中： 在 ../../../../src/main/jniIncludes\opencv2/opencv.hpp:52 包含的文件中： 在 ../../../../src/main/jniIncludes\opencv2/core.hpp:52 包含的文件中： **../../../../src/main/jniIncludes\opencv2/core/cvdef.h:183:10：致命错误：找不到“限制”文件 #include

生成 1 个错误。** ninja：构建停止：子命令失败。

我的 cmake 文件

    cmake_minimum_required(VERSION 3.4.1)
set(CMAKE_VERBOSE_MAKEFILE on)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -stdlib=libstdc++")
SET(CMAKE_EXE_LINKER_FLAGS  "-lopencv_stitching")
include_directories(${CMAKE_SOURCE_DIR}/src/main/jniIncludes)

add_library(native-panorama
            SHARED
        src/main/jni/com_example_sunscape_NativePanorama.cpp)
add_library(lib_opencv SHARED IMPORTED)
set_target_properties(lib_opencv PROPERTIES IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/src/main/libs/${ANDROID_ABI}/libopencv_java4.so)
find_library(log-lib
                log)
target_link_libraries(native-panorama ${log-lib} lib_opencv)

gradle 文件

externalNativeBuild {
            cmake {
                arguments "-DANDROID_TOOLCHAIN=clang++","-DANDROID_ARM_NEON=TRUE" ,"-DANDROID_STL_FORCE_FEATURES=OFF"
                cppFlags "-std=gnu++11", "-Wno-error=format-security","-frtti -fexceptions"
            }
        }
        ndk {
             abiFilters 'x86', 'x86_64', 'armeabi-v7a',
                    'arm64-v8a'
        }

Answer 1

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -stdlib=libstdc++")

不要那样做。