Ubuntu14.04 Opencv2.4.9交叉编译

经过一个多星期苦逼中，终于把Opencv交叉编译通过了。废话不多说，把我过程分享出来，希望能够让你们少走些弯路。不同的linux系统、opencv版本、arm编译器，opencv交叉编译方法会有所不同。本文提供一个已验证可实行的方法：Ubuntu14.04+Opencv2.4.9+arm-linux-gcc-4.3.2+2.8.12。

在 opencv 交叉编译之前要先进行依赖库的交叉编译，然后才能进行 opencv 库的交叉编译（因为opencv 依赖于很多库函数，如果不编译会造成，编译后的opencv 无法使用）。这里首先给出OpenCV 交叉编译时各个库的依赖关系：

OpenCV

|--------zlib

|--------jpeg

|--------libpng

|--------zlib

|--------tiff

|--------zlib

|--------ffmpeg

|--------x264

|--------xvidcore

首先感谢这位博主 http://blog.chinaunix.net/uid-28669227-id-5024889.html 本人已验证其方法可行，但由于其采用opencv2.0版本过老及没有采用CMake-gui来交叉编译，本人最终选择了更新的opencv版本。

安装依赖项

sudo apt-get install libavcodec-dev libavformat-dev libswscale-dev

这几项与视频解码相关，不安装的话后面opencv make结果就会出现这样：

FFMPEG: NO

-- codec: NO

-- format: NO

-- util: NO

-- swscale: NO

-- gentoo-style: NO

ARM编译器安装：

将arm-linux-gcc-4.3.2.tar.gz在 /usr/local/arm/ 下解压，在 /root/.bashrc 添加环境变量

export PATH=$PATH:/usr/local/arm/4.3.2/bin arm编译器路径

export OPENCV_DEPEND=/usr/local/arm/opencv-depend opencv依赖库安装路径

export OPENCV_INSTALL=/usr/local/arm/opencv-install opencv安装路径

arm再按Tab键出现 arm-none-linux-gnueabi-gcc-4.3.2

依赖库的安装编译主要包括:

zlib-1.2.8

jpeg-9a

libpng-1.6.18

yasm-1.3.0

x264-snapshot-20151030-2245

xvidcore-1.3.3

ffmpeg-2.8.1

1， libz 的交叉编译：

./configure --prefix=$OPENCV_DEPEND –shared

修改 Makefile

CC=arm-linux-gcc

AR=arm-linux-ar

RANLIB=arm-linux-ranlib

LDSHARED=arm-linux-gcc -shared-Wl,-soname,libz.so.1,--version-script,zlib.map

make

make install

2， libjpeg的交叉编译：

./configure--host=arm-linux --prefix=$OPENCV_DEPEND --enable-shared --enable-static

make

makeinstall

3， libpng 的交叉编译:

./configure --host=arm-linux--prefix=$OPENCV_DEPEND --enable-shared --enable-static

make

makeinstall

4， yasm 的交叉编译:

CC=arm-linux-gcc ./configure--enable-shared --host=arm-linux --disable-asm --prefix=$OPENCV_DEPEND

make

makeinstall

5， libx264 的交叉编译:

CC=arm-linux-gcc ./configure--enable-shared --host=arm-linux --disable-asm --prefix=$OPENCV_DEPEND

make

makeinstall

6， libxvid 的交叉编译

cd build/generic

./configure --prefix=$OPENCV_DEPEND--host=arm-linux --disable-assembly

make

makeinstall

7， ffmpeg 的交叉编译:

./configure --prefix=$OPENCV_DEPEND--enable-shared --disable-static --enable-gpl --enable-cross-compile --arch=arm --disable-stripping --target-os=linux --enable-libx264 --enable-libxvid--cc=arm-linux-gcc --enable-swscale --extra-ldflags=-L$OPENCV_DEPEND/lib --extra-cflags=-I$OPENCV_DEPEND/include

make

makeinstall

到此所有依赖库编译安装完成

Cmake安装 sudo apt-get install cmake cmake-qt-gui

需要把 /usr/local/arm/opencv-depend 目录下lib和include所有的文件分别拷贝到 /usr/local/arm/4.3.2/arm-non-linux-gnueabi lib和include下，不然后面opencv make时会出现如下错误:

Opencv交叉编译

cd opencv-2.4.9

mkdir build

cd build

vim toolchain.cmake

###########user defined#############

set( CMAKE_SYSTEM_NAME Linux )

set( CMAKE_SYSTEM_PROCESSOR arm )

set( CMAKE_C_COMPILERarm-none-linux-gnueabi-gcc )

set( CMAKE_CXX_COMPILERarm-none-linux-gnueabi-g++ )

###########user defined#############

set( CMAKE_FIND_ROOT_PATH"/usr/local/arm/opencv-depend" )

set( CMAKE_FIND_ROOT_PATH_MODE_PROGRAMNEVER )

set( CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)

set( CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)

######################################

保存然后

cmake-DCMAKE_TOOLCHAIN_FILE=toolchain.cmake ../

紧接着 cmake-gui



默认安装目录为 opencv-2.4.9/build/install ，改为 /usr/local/arm/opencv-install

修改编译选项

CMAKE_INSTALL_PREFIX /usr/local/arm/opencv-install

去掉 WITH_CUDA

去掉 WITH_GTK

去掉 WITH_1394

去掉 WITH_GSTREAMER

去掉 WITH_LIBV4L （因为后面有另外一个WITH_V4L）

去掉 WITH_TIFF

去掉 BUILD_OPENEXR

去掉 WITH_OPENEXR

去掉 BUILD_opencv_ocl

去掉 WITH_OPENCL

根据自己的需要选择编译的选项，有的选项需要安装相应的依赖的库，否则编译会出错

完成后 Generate

修改 CMakeCache.txt， CMAKE_EXE_LINKER_FLAGS原来为空，加上 -lpthread -lrt

make

makeinstall

下面是我生成的make，可以参考下,有几个红色关键点

-- General configuration for OpenCV 2.4.9 =====================================

-- Version control: unknown

--

-- Platform:

-- Host: Linux 4.2.0-27-generic x86_64

-- Target: Linux arm

-- CMake: 2.8.12.2

-- CMake generator: Unix Makefiles

-- CMake build tool: /usr/bin/make

-- Configuration: Release

--

-- C/C++:

-- Built as dynamic libs?: YES

-- C++ Compiler: /usr/local/arm/4.3.2/bin/arm-none-linux-gnueabi-g++ (ver 4.3.2)

-- C++ flags (Release): -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -fdiagnostics-show-option -pthread -fomit-frame-pointer
-ffunction-sections -O3 -DNDEBUG -DNDEBUG

-- C++ flags (Debug): -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -fdiagnostics-show-option -pthread -fomit-frame-pointer
-ffunction-sections -g -O0 -DDEBUG -D_DEBUG

-- C Compiler: /usr/local/arm/4.3.2/bin/arm-none-linux-gnueabi-gcc

-- C flags (Release): -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -fdiagnostics-show-option
-pthread -fomit-frame-pointer -ffunction-sections -O3 -DNDEBUG -DNDEBUG

-- C flags (Debug): -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -fdiagnostics-show-option
-pthread -fomit-frame-pointer -ffunction-sections -g -O0 -DDEBUG -D_DEBUG

-- Linker flags (Release):

-- Linker flags (Debug):

-- Precompiled headers: YES

--

-- OpenCV modules:

-- To be built: core flann imgproc highgui features2d calib3d ml video legacy objdetect photo gpu ocl nonfree contrib stitching superres ts videostab

-- Disabled: world

-- Disabled by dependency: -

-- Unavailable: androidcamera dynamicuda java python viz

--

-- GUI:

-- QT: NO

-- GTK+ 2.x: NO

-- GThread : NO

-- GtkGlExt: NO

-- OpenGL support: NO

-- VTK support: NO

--

-- Media I/O:

-- ZLib: /usr/local/arm/opencv-depend/lib/libz.so (ver 1.2.8)

-- JPEG: /usr/local/arm/opencv-depend/lib/libjpeg.so (ver 90)

-- PNG: /usr/local/arm/opencv-depend/lib/libpng.so (ver 1.6.18)

-- TIFF: build (ver 42 - 4.0.2)

-- JPEG 2000: build (ver 1.900.1)

-- OpenEXR: build (ver 1.7.1)

--

-- Video I/O:

-- DC1394 1.x: NO

-- DC1394 2.x: NO

-- FFMPEG: YES

-- codec: YES (ver 54.35.0)

-- format: YES (ver 54.20.4)

-- util: YES (ver 52.3.0)

-- swscale: YES (ver 2.1.1)

-- gentoo-style: YES

-- GStreamer: NO

-- OpenNI: NO

-- OpenNI PrimeSensor Modules: NO

-- PvAPI: NO

-- GigEVisionSDK: NO

-- UniCap: NO

-- UniCap ucil: NO

-- V4L/V4L2: YES/YES

-- XIMEA: NO

-- Xine: NO

--

-- Other third-party libraries:

-- Use IPP: NO

-- Use Eigen: NO

-- Use TBB: NO

-- Use OpenMP: NO

-- Use GCD NO

-- Use Concurrency NO

-- Use C=: NO

-- Use Cuda: NO

-- Use OpenCL: YES

--

-- OpenCL:

-- Version: dynamic

-- Include path: /root/opencv-best/opencv-2.4.9/3rdparty/include/opencl/1.2

-- Use AMD FFT: NO

-- Use AMD BLAS: NO

--

-- Python:

-- Interpreter: /usr/bin/python2 (ver 2.7.6)

--

-- Java:

-- ant: NO

-- JNI: NO

-- Java tests: NO

--

-- Documentation:

-- Build Documentation: NO

-- Sphinx: NO

-- PdfLaTeX compiler: NO

--

-- Tests and samples:

-- Tests: YES

-- Performance tests: YES

-- C/C++ Examples: NO

--

-- Install path: /usr/local/arm/opencv-install

--

-- cvconfig.h is in: /root/opencv-best/opencv-2.4.9/build

-- -----------------------------------------------------------------

最后要将 OPENCV_DEPEND下依赖库lib和OPENCV_INSTALL安装的库lib都拷贝到板子上lib目录下，Opencv即可在ARM板子上运行了….

特此感谢

OpenCV移植到ARM9

Ubuntu下OpenCV 2.4.3以及Qt 4.8.3的交叉编译