caffe2编译android库,使用CMake交叉编译Android环境的OpenCV

编译环境

这一点十分重要，有时候如果环境不同，可能出现一些奇奇怪怪的错误，会浪费大量的时间去填坑。

比如我用>Android NDK r18b版本编译，就报错：

针对这个报错，我提了一个issues：https://github.com/opencv/opencv/issues/15521

不知道以后会不会解决。

解决了：

如果使用>Android NDK r18b编译，需要添加下面的参数：

-DBUILD_ZLIB=ON

[ 57%] Linking CXX shared library ../../lib/armeabi-v7a/libopencv_core.so

bionic/libc/include/bits/fortify/stdio.h:70: error: undefined reference to '__vsnprintf_chk'

bionic/libc/include/bits/fortify/stdio.h:43: error: undefined reference to '__vsnprintf_chk'

clang++: error: linker command failed with exit code 1 (use -v to see invocation)

modules/core/CMakeFiles/opencv_core.dir/build.make:1345: recipe for target 'lib/armeabi-v7a/libopencv_core.so' failed

make[2]: *** [lib/armeabi-v7a/libopencv_core.so] Error 1

CMakeFiles/Makefile2:1509: recipe for target 'modules/core/CMakeFiles/opencv_core.dir/all' failed

make[1]: *** [modules/core/CMakeFiles/opencv_core.dir/all] Error 2

make[1]: *** Waiting for unfinished jobs....

[ 57%] Linking CXX static library ../lib/armeabi-v7a/libIlmImf.a

[ 57%] Built target IlmImf

Makefile:162: recipe for target 'all' failed

make: *** [all] Error 2

Ubuntu 16.04 LTS 64-bit

cmake 3.13.4

Android SDK

针对Android SDK我感觉没什么特别要求，从API Level 22 到 29我都安装了。

image.png

配置环境变量

上面东西都准备好之后，我们还需要配置一下环境变量：

在 ~/.bashrc 中添加：

export ANDROID_HOME=/home/andforce/Android/Sdk

export ANDROID_SDK=$ANDROID_HOME

export ANDROID_NDK_HOME=/home/andforce/Downloads/android-ndk-r17c

export ANDROID_NDK=$ANDROID_NDK_HOME

开始编译

解压下载的OpenCV 4.1.1源码，进入源码目录后：

$ tree -L 1

.

├── 3rdparty

├── apps

├── cmake

├── CMakeLists.txt

├── CONTRIBUTING.md

├── data

├── doc

├── include

├── LICENSE

├── modules

├── platforms

├── README.md

└── samples

9 directories, 4 files

创建存放编译结果的目录

$mkdir build

进入build目录开始编译：

$cd build

# 开始执行 cmake 编译命令

# 注意有【..】，表示源码目录在上一层，因为我们现在是在build目录

cmake .. -DINSTALL_ANDROID_EXAMPLES=OFF \

-DANDROID_EXAMPLES_WITH_LIBS=OFF \

-DBUILD_EXAMPLES=OFF \

-DBUILD_DOCS=OFF \

-DWITH_OPENCL=OFF \

-DWITH_IPP=ON \

-DCMAKE_TOOLCHAIN_FILE=${ANDROID_NDK_HOME}/build/cmake/android.toolchain.cmake \

-DANDROID_TOOLCHAIN=clang \

-DANDROID_STL=c++_shared \

-DBUILD_SHARED_LIBS=ON \

-DBUILD_ANDROID_PROJECTS=OFF \

-DBUILD_ANDROID_EXAMPLES=OFF \

-DBUILD_PREF_TESTS=OFF \

-DBUILD_TESTS=OFF \

-DANDROID_ABI=armeabi-v7a \

-DANDROID_SDK_TARGET=21

几个重要的参数含义

#NDK中toolchain的路径

-DCMAKE_TOOLCHAIN_FILE=${ANDROID_NDK_HOME}/build/cmake/android.toolchain.cmake

#toolchain是clang版本

-DANDROID_TOOLCHAIN=clang

#表示编译出的是.a静态库，如果要编译.so动态库，配置成c++_shared就可以了

-DANDROID_STL=c++_static

#不编译Android工程

-DBUILD_ANDROID_PROJECTS=OFF

#不编译事例工程

-DBUILD_ANDROID_EXAMPLES=OFF

#不编译PREF test

-DBUILD_PREF_TESTS=OFF

#不编译test

-DBUILD_TESTS=OFF

#android abi，x86，x86_64等

-DANDROID_ABI=armeabi-v7a

#Android target sdk

-DANDROID_SDK_TARGET=21

也许你有别的cmake参数想修改？

首先得知道支持哪些参数，在执行完上面的cmake命令之后，在build目录执行：

cmake -LA .

可以看到，有很多很多的参数，请根据自己的情况选择吧。

ANDROID_EXAMPLES_WITH_LIBS:BOOL=OFF

BUILD_ANDROID_EXAMPLES:BOOL=OFF

BUILD_ANDROID_PROJECTS:BOOL=OFF

BUILD_ANDROID_SERVICE:BOOL=OFF

BUILD_CUDA_STUBS:BOOL=OFF

BUILD_DOCS:BOOL=OFF

BUILD_EXAMPLES:BOOL=OFF

BUILD_FAT_JAVA_LIB:BOOL=ON

BUILD_ITT:BOOL=ON

BUILD_JASPER:BOOL=ON

BUILD_JAVA:BOOL=ON

BUILD_JPEG:BOOL=ON

BUILD_LIST:STRING=

BUILD_OPENEXR:BOOL=ON

BUILD_PACKAGE:BOOL=ON

BUILD_PERF_TESTS:BOOL=ON

BUILD_PNG:BOOL=ON

BUILD_PROTOBUF:BOOL=ON

BUILD_SHARED_LIBS:BOOL=OFF

BUILD_TBB:BOOL=ON

BUILD_TESTS:BOOL=OFF

BUILD_TIFF:BOOL=ON

BUILD_USE_SYMLINKS:BOOL=OFF

BUILD_WEBP:BOOL=ON

BUILD_WITH_DEBUG_INFO:BOOL=OFF

BUILD_WITH_DYNAMIC_IPP:BOOL=OFF

BUILD_ZLIB:BOOL=OFF

BUILD_opencv_apps:BOOL=OFF

BUILD_opencv_calib3d:BOOL=ON

BUILD_opencv_core:BOOL=ON

BUILD_opencv_dnn:BOOL=ON

BUILD_opencv_features2d:BOOL=ON

BUILD_opencv_flann:BOOL=ON

BUILD_opencv_highgui:BOOL=ON

BUILD_opencv_imgcodecs:BOOL=ON

BUILD_opencv_imgproc:BOOL=ON

BUILD_opencv_java_bindings_generator:BOOL=ON

BUILD_opencv_js:BOOL=OFF

BUILD_opencv_ml:BOOL=ON

BUILD_opencv_objdetect:BOOL=ON

BUILD_opencv_photo:BOOL=ON

BUILD_opencv_stitching:BOOL=ON

BUILD_opencv_ts:BOOL=ON

BUILD_opencv_video:BOOL=ON

BUILD_opencv_videoio:BOOL=ON

BUILD_opencv_world:BOOL=OFF

CAROTENE_NS:STRING=carotene_o4t

CCACHE_PROGRAM:FILEPATH=CCACHE_PROGRAM-NOTFOUND

CMAKE_AR:FILEPATH=/home/andforce/Downloads/android-ndk-r17c/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-ar

CMAKE_ASM_FLAGS:STRING=

CMAKE_ASM_FLAGS_DEBUG:STRING=

CMAKE_ASM_FLAGS_RELEASE:STRING=

CMAKE_BUILD_TYPE:STRING=

CMAKE_COLOR_MAKEFILE:BOOL=ON

CMAKE_CONFIGURATION_TYPES:STRING=Debug;Release

CMAKE_CXX_COMPILER_AR:FILEPATH=CMAKE_CXX_COMPILER_AR-NOTFOUND

CMAKE_CXX_COMPILER_RANLIB:FILEPATH=CMAKE_CXX_COMPILER_RANLIB-NOTFOUND

CMAKE_CXX_FLAGS:STRING=

CMAKE_CXX_FLAGS_DEBUG:STRING=

CMAKE_CXX_FLAGS_MINSIZEREL:STRING=-Os -DNDEBUG

CMAKE_CXX_FLAGS_RELEASE:STRING=

CMAKE_CXX_FLAGS_RELWITHDEBINFO:STRING=-O2 -g -DNDEBUG

CMAKE_CXX_STANDARD_LIBRARIES:STRING=-latomic -lm "/home/andforce/Downloads/android-ndk-r17c/sources/cxx-stl/llvm-libc++/libs/armeabi-v7a/libc++_static.a" "/home/andforce/Downloads/android-ndk-r17c/sources/cxx-stl/llvm-libc++/libs/armeabi-v7a/libc++abi.a" "/home/andforce/Downloads/android-ndk-r17c/sources/cxx-stl/llvm-libc++/libs/armeabi-v7a/libandroid_support.a" "/home/andforce/Downloads/android-ndk-r17c/sources/cxx-stl/llvm-libc++/libs/armeabi-v7a/libunwind.a" "-ldl"

CMAKE_C_COMPILER_AR:FILEPATH=CMAKE_C_COMPILER_AR-NOTFOUND

CMAKE_C_COMPILER_RANLIB:FILEPATH=CMAKE_C_COMPILER_RANLIB-NOTFOUND

CMAKE_C_FLAGS:STRING=

CMAKE_C_FLAGS_DEBUG:STRING=

CMAKE_C_FLAGS_MINSIZEREL:STRING=-Os -DNDEBUG

CMAKE_C_FLAGS_RELEASE:STRING=

CMAKE_C_FLAGS_RELWITHDEBINFO:STRING=-O2 -g -DNDEBUG

CMAKE_C_STANDARD_LIBRARIES:STRING=-latomic -lm

CMAKE_EXE_LINKER_FLAGS:STRING=

CMAKE_EXE_LINKER_FLAGS_DEBUG:STRING=

CMAKE_EXE_LINKER_FLAGS_MINSIZEREL:STRING=

CMAKE_EXE_LINKER_FLAGS_RELEASE:STRING=

CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO:STRING=

CMAKE_EXPORT_COMPILE_COMMANDS:BOOL=OFF

CMAKE_INSTALL_PREFIX:PATH=/home/andforce/Downloads/opencv-4.1.1/build/install

CMAKE_LINKER:FILEPATH=/home/andforce/Downloads/android-ndk-r17c/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-ld

CMAKE_MAKE_PROGRAM:FILEPATH=/usr/bin/make

CMAKE_MODULE_LINKER_FLAGS:STRING=

CMAKE_MODULE_LINKER_FLAGS_DEBUG:STRING=

CMAKE_MODULE_LINKER_FLAGS_MINSIZEREL:STRING=

CMAKE_MODULE_LINKER_FLAGS_RELEASE:STRING=

CMAKE_MODULE_LINKER_FLAGS_RELWITHDEBINFO:STRING=

CMAKE_NM:FILEPATH=/home/andforce/Downloads/android-ndk-r17c/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-nm

CMAKE_OBJCOPY:FILEPATH=/home/andforce/Downloads/android-ndk-r17c/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-objcopy

CMAKE_OBJDUMP:FILEPATH=/home/andforce/Downloads/android-ndk-r17c/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-objdump

CMAKE_RANLIB:FILEPATH=/home/andforce/Downloads/android-ndk-r17c/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-ranlib

CMAKE_SHARED_LINKER_FLAGS:STRING=

CMAKE_SHARED_LINKER_FLAGS_DEBUG:STRING=

CMAKE_SHARED_LINKER_FLAGS_MINSIZEREL:STRING=

CMAKE_SHARED_LINKER_FLAGS_RELEASE:STRING=

CMAKE_SHARED_LINKER_FLAGS_RELWITHDEBINFO:STRING=

CMAKE_SKIP_INSTALL_RPATH:BOOL=NO

CMAKE_SKIP_RPATH:BOOL=NO

CMAKE_STATIC_LINKER_FLAGS:STRING=

CMAKE_STATIC_LINKER_FLAGS_DEBUG:STRING=

CMAKE_STATIC_LINKER_FLAGS_MINSIZEREL:STRING=

CMAKE_STATIC_LINKER_FLAGS_RELEASE:STRING=

CMAKE_STATIC_LINKER_FLAGS_RELWITHDEBINFO:STRING=

CMAKE_STRIP:FILEPATH=/home/andforce/Downloads/android-ndk-r17c/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-strip

CMAKE_TOOLCHAIN_FILE:FILEPATH=/home/andforce/Downloads/android-ndk-r17c/build/cmake/android.toolchain.cmake

CMAKE_VERBOSE_MAKEFILE:BOOL=FALSE

CPACK_BINARY_DEB:BOOL=OFF

CPACK_BINARY_FREEBSD:BOOL=OFF

CPACK_BINARY_IFW:BOOL=OFF

CPACK_BINARY_NSIS:BOOL=OFF

CPACK_BINARY_RPM:BOOL=OFF

CPACK_BINARY_STGZ:BOOL=ON

CPACK_BINARY_TBZ2:BOOL=OFF

CPACK_BINARY_TGZ:BOOL=ON

CPACK_BINARY_TXZ:BOOL=OFF

CPACK_BINARY_TZ:BOOL=ON

CPACK_SOURCE_RPM:BOOL=OFF

CPACK_SOURCE_TBZ2:BOOL=ON

CPACK_SOURCE_TGZ:BOOL=ON

CPACK_SOURCE_TXZ:BOOL=ON

CPACK_SOURCE_TZ:BOOL=ON

CPACK_SOURCE_ZIP:BOOL=OFF

CPUFEATURES_ROOT:PATH=/home/andforce/Downloads/opencv-4.1.1/3rdparty/cpufeatures

CPU_BASELINE:STRING=DETECT

CPU_DISPATCH:STRING=

CV_DISABLE_OPTIMIZATION:BOOL=OFF

CV_ENABLE_INTRINSICS:BOOL=ON

CV_TRACE:BOOL=ON

ENABLE_BUILD_HARDENING:BOOL=OFF

ENABLE_CCACHE:BOOL=ON

ENABLE_CONFIG_VERIFICATION:BOOL=OFF

ENABLE_FAST_MATH:BOOL=OFF

ENABLE_IMPL_COLLECTION:BOOL=OFF

ENABLE_INSTRUMENTATION:BOOL=OFF

ENABLE_NOISY_WARNINGS:BOOL=OFF

ENABLE_PIC:BOOL=ON

ENABLE_PRECOMPILED_HEADERS:BOOL=OFF

ENABLE_SOLUTION_FOLDERS:BOOL=OFF

ENABLE_THIN_LTO:BOOL=OFF

EXECUTABLE_OUTPUT_PATH:PATH=/home/andforce/Downloads/opencv-4.1.1/build/bin

GENERATE_ABI_DESCRIPTOR:BOOL=OFF

GIT_EXECUTABLE:FILEPATH=/usr/bin/git

HAVE_IEEEFP:STRING=1

HOST_BIG_ENDIAN:STRING=OFF

HOST_FILLORDER:STRING=FILLORDER_LSB2MSB

INSTALL_ANDROID_EXAMPLES:BOOL=OFF

INSTALL_CREATE_DISTRIB:BOOL=OFF

INSTALL_C_EXAMPLES:BOOL=OFF

INSTALL_PYTHON_EXAMPLES:BOOL=OFF

INSTALL_TESTS:BOOL=OFF

LIBRARY_OUTPUT_PATH_ROOT:PATH=/home/andforce/Downloads/opencv-4.1.1/build

M_LIBRARY:FILEPATH=/home/andforce/Downloads/android-ndk-r17c/platforms/android-14/arch-arm/usr/lib/libm.so

OPENCV_CONFIG_FILE_INCLUDE_DIR:PATH=/home/andforce/Downloads/opencv-4.1.1/build

OPENCV_DNN_CUDA:BOOL=OFF

OPENCV_DNN_OPENCL:BOOL=OFF

OPENCV_DOWNLOAD_PATH:PATH=/home/andforce/Downloads/opencv-4.1.1/.cache

OPENCV_DUMP_HOOKS_FLOW:BOOL=OFF

OPENCV_ENABLE_MEMORY_SANITIZER:BOOL=OFF

OPENCV_ENABLE_NONFREE:BOOL=OFF

OPENCV_EXTRA_MODULES_PATH:PATH=

OPENCV_FORCE_3RDPARTY_BUILD:BOOL=OFF

OPENCV_GENERATE_PKGCONFIG:BOOL=OFF

OPENCV_MATHJAX_RELPATH:STRING=https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.0

OPENCV_PYTHON3_VERSION:BOOL=OFF

OPENCV_TIMESTAMP:STRING=2019-09-13T14:41:40Z

OPENCV_WARNINGS_ARE_ERRORS:BOOL=OFF

OpenCV_HAL_DIR:PATH=OpenCV_HAL_DIR-NOTFOUND

PROTOBUF_UPDATE_FILES:BOOL=OFF

PYTHON2_EXECUTABLE:FILEPATH=/usr/bin/python2.7

PYTHON2_INCLUDE_DIR:PATH=

PYTHON2_INCLUDE_DIR2:PATH=

PYTHON2_LIBRARY:FILEPATH=

PYTHON2_LIBRARY_DEBUG:FILEPATH=

PYTHON2_NUMPY_INCLUDE_DIRS:PATH=

PYTHON2_PACKAGES_PATH:PATH=

PYTHON3_EXECUTABLE:FILEPATH=/usr/bin/python3

PYTHON3_INCLUDE_DIR:PATH=

PYTHON3_INCLUDE_DIR2:PATH=

PYTHON3_LIBRARY:FILEPATH=

PYTHON3_LIBRARY_DEBUG:FILEPATH=

PYTHON3_NUMPY_INCLUDE_DIRS:PATH=

PYTHON3_PACKAGES_PATH:PATH=

USE_WIN32_FILEIO:BOOL=FALSE

VIDEOIO_ENABLE_PLUGINS:BOOL=ON

VIDEOIO_ENABLE_STRICT_PLUGIN_CHECK:BOOL=ON

VIDEOIO_PLUGIN_LIST:STRING=

WITH_ADE:BOOL=ON

WITH_ANDROID_MEDIANDK:BOOL=OFF

WITH_ARITH_DEC:BOOL=ON

WITH_ARITH_ENC:BOOL=ON

WITH_CAROTENE:BOOL=ON

WITH_CLP:BOOL=OFF

WITH_CPUFEATURES:BOOL=ON

WITH_CUDA:BOOL=OFF

WITH_EIGEN:BOOL=OFF

WITH_FFMPEG:BOOL=OFF

WITH_GDCM:BOOL=OFF

WITH_HALIDE:BOOL=OFF

WITH_HPX:BOOL=OFF

WITH_IMGCODEC_HDR:BOOL=ON

WITH_IMGCODEC_PFM:BOOL=ON

WITH_IMGCODEC_PXM:BOOL=ON

WITH_IMGCODEC_SUNRASTER:BOOL=ON

WITH_INF_ENGINE:BOOL=OFF

WITH_ITT:BOOL=ON

WITH_JASPER:BOOL=ON

WITH_JPEG:BOOL=ON

WITH_LIBREALSENSE:BOOL=OFF

WITH_OPENCL:BOOL=OFF

WITH_OPENCL_SVM:BOOL=OFF

WITH_OPENEXR:BOOL=ON

WITH_OPENMP:BOOL=OFF

WITH_OPENVX:BOOL=OFF

WITH_PNG:BOOL=ON

WITH_PROTOBUF:BOOL=ON

WITH_PTHREADS_PF:BOOL=ON

WITH_QUIRC:BOOL=ON

WITH_TBB:BOOL=OFF

WITH_TIFF:BOOL=ON

WITH_VULKAN:BOOL=OFF

WITH_WEBP:BOOL=ON

ZLIB_INCLUDE_DIR:PATH=/home/andforce/Downloads/android-ndk-r17c/sysroot/usr/include

ZLIB_LIBRARY_DEBUG:FILEPATH=ZLIB_LIBRARY_DEBUG-NOTFOUND

ZLIB_LIBRARY_RELEASE:FILEPATH=/home/andforce/Downloads/android-ndk-r17c/platforms/android-14/arch-arm/usr/lib/libz.so

ccitt:BOOL=ON

logluv:BOOL=ON

lzw:BOOL=ON

mdi:BOOL=ON

next:BOOL=ON

old-jpeg:BOOL=OFF

opencv_dnn_PERF_CAFFE:BOOL=OFF

opencv_dnn_PERF_CLCAFFE:BOOL=OFF

packbits:BOOL=ON

thunder:BOOL=ON

回到正题，继续说如何编译

cmake结束之后,输出类似下面的信息，表示成功了

-- Install to: /home/andforce/Downloads/opencv-4.1.1/build/install

--

-- Configuring done

-- Generating done

-- Build files have been written to: /home/andforce/Downloads/opencv->4.1.1/build

看一下build目录下生成的东西：

build$ tree -L 1

.

├── 3rdparty

├── bin

├── carotene

├── CMakeCache.txt

├── CMakeDownloadLog.txt

├── CMakeFiles

├── cmake_install.cmake

├── cmake_uninstall.cmake

├── CMakeVars.txt

├── configured

├── CPackConfig.cmake

├── CPackSourceConfig.cmake

├── CTestTestfile.cmake

├── custom_hal.hpp

├── cvconfig.h

├── cv_cpu_config.h

├── data

├── doc

├── include

├── lib

├── Makefile #

├── modules

├── opencv2

├── OpenCV-armeabi-v7a.mk

├── OpenCVConfig.cmake

├── OpenCVConfig-version.cmake

├── opencv_data_config.hpp

├── OpenCV.mk

├── OpenCVModules.cmake

├── opencv_tests_config.hpp

├── platforms

├── unix-install

└── version_string.tmp

13 directories, 20 files

还是在build目录，执行make -j8开始编译

#根据电脑性能可以调整-j后面的参数，一般为CPU核心数的2倍

$make -j8

Scanning dependencies of target libcpufeatures

[ 0%] Building C object 3rdparty/cpufeatures/CMakeFiles/libcpufeatures.dir/cpu-features.c.o

[ 0%] Building C object 3rdparty/libjasper/CMakeFiles/libjasper.dir/jas_cm.c.o

.

.此处省略...

.

[ 74%] Building CXX object >modules/ts/CMakeFiles/opencv_ts.dir/src/cuda_test.cpp.o

.

.此处省略...

.

[ 99%] Building CXX object modules/imgproc/CMakeFiles/opencv_perf_imgproc.dir/perf/perf_warp.cpp.o

[100%] Linking CXX executable ../../bin/opencv_perf_imgproc

[100%] Built target opencv_perf_imgproc

跑到100%表示编译结束了

在build/lib/armeabi-v7a生成了对应的静态库

build/lib/armeabi-v7a$ ls

libopencv_calib3d.so libopencv_highgui.so libopencv_photo.so

libopencv_core.so libopencv_imgcodecs.so libopencv_stitching.so

libopencv_dnn.so libopencv_imgproc.so libopencv_ts.a

libopencv_features2d.so libopencv_ml.so libopencv_videoio.so

libopencv_flann.so libopencv_objdetect.so libopencv_video.so

生成sdk

还是在build目录下，执行make install

build$ make install

之后会在build/install/下生成sdk

build/install$ tree -L 3

.

├── LICENSE

├── README.android

└── sdk

├── etc

│ ├── haarcascades

│ ├── lbpcascades

│ ├── licenses

│ ├── valgrind_3rdparty.supp

│ └── valgrind.supp

└── native

├── 3rdparty

├── jni

└── staticlibs

9 directories, 4 files

头文件在:build/install/sdk/native/jni/include/

build/install/sdk/native/jni/include/opencv2$ ls

calib3d dnn.hpp highgui.hpp ml.hpp photo.hpp videoio.hpp

calib3d.hpp features2d imgcodecs objdetect stitching

core features2d.hpp imgcodecs.hpp objdetect.hpp stitching.hpp

core.hpp flann imgproc opencv.hpp video

cvconfig.h flann.hpp imgproc.hpp opencv_modules.hpp video.hpp

dnn highgui ml photo videoio

静态库在：build/install/sdk/native/staticlibs/

build/install/sdk/native/staticlibs/armeabi-v7a$ ls

libopencv_calib3d.so libopencv_highgui.so libopencv_photo.so

libopencv_core.so libopencv_imgcodecs.so libopencv_stitching.so

libopencv_dnn.so libopencv_imgproc.so libopencv_videoio.so

libopencv_features2d.so libopencv_ml.so libopencv_video.so

libopencv_flann.so libopencv_objdetect.so

到此，整个交叉编译过程就结束了。

cmake .. \

-DCMAKE_TOOLCHAIN_FILE=${ANDROID_NDK_HOME}/build/cmake/android.toolchain.cmake \

-DCMAKE_BUILD_TYPE=Release \

-DANDROID_ABI="x86" \

-DANDROID_NATIVE_API_LEVEL=21 \

-DWITH_CAROTENE=OFF \

-DWITH_CLP=OFF \

-DWITH_CUBLAS=OFF \

-DWITH_CUDA=OFF \

-DWITH_CUFFT=OFF \

-DWITH_EIGEN=OFF \

-DWITH_GDCM=OFF \

-DWITH_GSTREAMER_0_10=OFF \

-DWITH_JASPER=OFF \

-DWITH_JPEG=OFF \

-DWITH_NVCUVID=OFF \

-DWITH_OPENCL=OFF \

-DWITH_OPENCL_SVM=OFF \

-DWITH_OPENEXR=OFF \

-DWITH_OPENMP=OFF \

-DWITH_OPENVX=OFF \

-DWITH_PNG=ON \

-DWITH_PTHREADS_PF=OFF \

-DWITH_TBB=OFF \

-DWITH_TIFF=OFF \

-DWITH_WEBP=OFF \

-DBUILD_ANDROID_EXAMPLES=OFF \

-DBUILD_ANDROID_SERVICE=OFF \

-DBUILD_CUDA_STUBS=OFF \

-DBUILD_DOCS=OFF \

-DBUILD_EXAMPLES=OFF \

-DBUILD_FAT_JAVA_LIB=OFF \

-DBUILD_JASPER=OFF \

-DBUILD_JPEG=OFF \

-DBUILD_OPENEXR=OFF \

-DBUILD_PACKAGE=OFF \

-DBUILD_PERF_TESTS=OFF \

-DBUILD_PNG=ON \

-DBUILD_SHARED_LIBS=OFF \

-DBUILD_TBB=OFF \

-DBUILD_TESTS=OFF \

-DBUILD_TIFF=OFF \

-DBUILD_WITH_DEBUG_INFO=OFF \

-DBUILD_WITH_DYNAMIC_IPP=OFF \

-DBUILD_opencv_apps=OFF \

-DBUILD_opencv_calib3d=ON \

-DBUILD_ZLIB=ON \

-DBUILD_opencv_core=ON \

-DBUILD_opencv_features2d=ON \

-DBUILD_opencv_flann=ON \

-DBUILD_opencv_highgui=ON \

-DBUILD_opencv_imgcodecs=ON \

-DBUILD_opencv_imgproc=ON \

-DBUILD_opencv_java=OFF \

-DBUILD_opencv_ml=ON \

-DBUILD_opencv_objdetect=OFF \

-DBUILD_opencv_photo=OFF \

-DBUILD_opencv_shape=OFF \

-DBUILD_opencv_stitching=OFF \

-DBUILD_opencv_stereo=OFF \

-DBUILD_opencv_superres=OFF \

-DBUILD_opencv_ts=OFF \

-DBUILD_opencv_video=OFF \

-DBUILD_opencv_videoio=OFF \

-DBUILD_opencv_line_descriptor=OFF \

-DBUILD_opencv_reg=OFF \

-DBUILD_opencv_saliency=OFF \

-DBUILD_opencv_videostab=OFF \

-DBUILD_opencv_world=OFF \

-DCMAKE_CXX_FLAGS="-ffunction-sections -fdata-sections -fvisibility=hidden -O3 -std=c++11 -mfloat-abi=softfp -mfpu=neon -march=armv7-a -mtune=cortex-a8" \

-DCMAKE_C_FLAGS="-ffunction-sections -fdata-sections -fvisibility=hidden -O3 -mfloat-abi=softfp -mfpu=neon -march=armv7-a -mtune=cortex-a8" \

-DCMAKE_SHARED_LINKER_FLAGS="-Wl,--gc-sections" \

-DBUILD_opencv_xfeatures2d=OFF \

-DBUILD_opencv_face=OFF \

-DBUILD_opencv_bgsegm=OFF \

-DBUILD_opencv_datasets=OFF \

-DBUILD_opencv_dpm=OFF \

-DBUILD_opencv_tracking=OFF \

-DBUILD_opencv_xobjdetect=OFF \

-DBUILD_opencv_optflow=OFF \

-DBUILD_opencv_tracking=OFF \

-DENABLE_NEON=ON \

-DBUILD_opencv_ximgproc=ON \

-DBUILD_opencv_dnn=OFF \

-DBUILD_opencv_structured_light=OFF \

-DBUILD_opencv_surface_matching=OFF \

-DBUILD_opencv_text=OFF \

-DBUILD_opencv_xphoto=OFF \

-DBUILD_opencv_fuzzy=OFF \

-DBUILD_opencv_bioinspired=OFF \

-DBUILD_opencv_phase_unwrapping=OFF \

-DBUILD_opencv_plot=OFF \

-DBUILD_opencv_rgbd=OFF \

-DBUILD_opencv_aruco=OFF