[yocto]yocto编译opencv4.5编译报错

buffoonnnn

已于 2023-05-16 16:32:14 修改

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分类专栏： yocto 文章标签： opencv linux 计算机视觉

于 2023-04-03 17:35:33 首次发布

本文链接：https://blog.youkuaiyun.com/buffoonnnn/article/details/129934541

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`yocto`编译`opencv`报错

背景：使用社区的opencv资源(别的包依赖opencv,而不单独添加配方文件编译目标)

1. undefined reference to `cv::String::deallocate()’

错误原因： opencv版本不匹配，opencv3.*和opencv4.*一些接口不相同
解决：确保链接了opencv4的lib，并且include正确版本的头文件

2.链接目标版本不匹配

/usr/local/cortex-a53-2022.08-gcc12.1-linux5.15/bin/../lib/gcc/aarch64-linux-gnu/12.1.1/../../../../aarch64-linux-gnu/bin/ld: warning: libopencv_core.so.3.4, needed by /xxx/libblade_runner.so, may conflict with libopencv_core.so.4.5
/usr/local/cortex-a53-2022.08-gcc12.1-linux5.15/bin/../lib/gcc/aarch64-linux-gnu/12.1.1/../../../../aarch64-linux-gnu/bin/ld: /xxx/test_blade_runner.o: undefined reference to symbol '_ZN2cv6String10deallocateEv'
/usr/local/cortex-a53-2022.08-gcc12.1-linux5.15/bin/../lib/gcc/aarch64-linux-gnu/12.1.1/../../../../aarch64-linux-gnu/bin/ld: /xxx/libopencv_core.so.3.4: error adding symbols: DSO missing from command line

原因：libopencv_core.so.3.4 和libopencv_core.so.4.5分别对应两个opencv版本，并且报错是由编译test_blade_runner.o引起的
- 使用readdlf -d test_blade_runner.so发现其版本为opencv3.4，但是编译目标使用的opencv版本为opencv3.
重新使用opencv4编译test_blade_runner.so，再重新编译

3.链接`rdeps`错误

ERROR: prebuild-bladerunner-1.0-r0 do_package_qa: QA Issue: /usr/lib/libblade_runner.so.1.1.3 contained in package prebuild-bladerunner requires libopencv_core.so.4.5()(64bit), but no providers found in RDEPENDS:prebuild-bladerunner? [file-rdeps]
ERROR: prebuild-bladerunner-1.0-r0 do_package_qa: QA Issue: /usr/lib/libblade_runner.so.1.1.3 contained in package prebuild-bladerunner requires libopencv_calib3d.so.4.5()(64bit), but no providers found in RDEPENDS:prebuild-bladerunner? [file-rdeps]

错误背景：在确保配方文件已经正确添加DEPENDS/RDEPENDS的前提下依然出现该错误
```
DEPENDS += "opencv"
RDEPENDS:${PN} += "libcavalrymem libnnctrl opencv"
```

原因：检查编译产物tmp/sysroots-components/cortexa53-crypto/opencv/usr/lib发现目标产物版本为libopencv_core.so.405，应该为libopencv_core.so.4.5

产物为libopencv_alphamat.so -> libopencv_alphamat.so.405 -> libopencv_alphamat.so.4.5.5

且目录下/tmp/work/cortexa53-crypto-poky-linux/prebuild-bladerunner/1.0-r0下检查libopencv_core.4.5

readelf -d  recipe-sysroot/usr/lib/libopencv_core.so.4.5.5

Dynamic section at offset 0x262758 contains 34 entries:
  Tag        Type                         Name/Value
 0x0000000000000001 (NEEDED)             Shared library: [libz.so.1]
 0x0000000000000001 (NEEDED)             Shared library: [libtbb.so.12]
 0x0000000000000001 (NEEDED)             Shared library: [libstdc++.so.6]
 0x0000000000000001 (NEEDED)             Shared library: [libm.so.6]
 0x0000000000000001 (NEEDED)             Shared library: [libgcc_s.so.1]
 0x0000000000000001 (NEEDED)             Shared library: [libc.so.6]
 0x0000000000000001 (NEEDED)             Shared library: [ld-linux-aarch64.so.1]
 0x000000000000000e (SONAME)             Library soname: [libopencv_core.so.405]
 0x000000000000000c (INIT)               0x5f7b0
 0x000000000000000d (FINI)               0x1df420

发现SONAME指定为libopencv_core.so.405而libblade_runner.so.1.1.3需要的NEEDED为libopencv_core.so.4.5所以产生错误

解决方法：在/tmp/work/cortexa53-crypto-poky-linux/opencv/4.5.5-r0/目录下检索VERSION相关参数(参数太多，需要筛选)

/tmp/work/cortexa53-crypto-poky-linux/opencv/4.5.5-r0/cmake/OpenCVVersion.cmake

OpenCVVersion.cmake:15:ocv_update(OPENCV_SOVERSION "${OPENCV_VERSION_MAJOR}${OPENCV_VERSION_MINOR_2DIGITS}")
OpenCVVersion.cmake:16:ocv_update(OPENCV_LIBVERSION "${OPENCV_VERSION_MAJOR}.${OPENCV_VERSION_MINOR}.${OPENCV_VERSION_PATCH}")

修改： OPENCV_SOVERSION 为ocv_update(OPENCV_SOVERSION "${OPENCV_VERSION_MAJOR}.${OPENCV_VERSION_MINOR_2DIGITS}")

生成patch

$ git status

tmp/work/cortexa53-crypto-poky-linux/opencv/4.5.5-r0/git/cmake$ git diff OpenCVVersion.cmake
diff --git a/cmake/OpenCVVersion.cmake b/cmake/OpenCVVersion.cmake
index 6ffaab94cf..d743634a7e 100644
--- a/cmake/OpenCVVersion.cmake
+++ b/cmake/OpenCVVersion.cmake
@@ -12,7 +12,7 @@ set(OPENCV_VERSION "${OPENCV_VERSION_PLAIN}${OPENCV_VERSION_STATUS}")

 string(REGEX MATCH "[0-9][0-9]$" OPENCV_VERSION_MINOR_2DIGITS "00${OPENCV_VERSION_MINOR}")
 string(REGEX MATCH "[0-9][0-9]$" OPENCV_VERSION_PATCH_2DIGITS "00${OPENCV_VERSION_PATCH}")
-ocv_update(OPENCV_SOVERSION "${OPENCV_VERSION_MAJOR}${OPENCV_VERSION_MINOR_2DIGITS}")
+ocv_update(OPENCV_SOVERSION "${OPENCV_VERSION_MAJOR}.${OPENCV_VERSION_MINOR}")
 ocv_update(OPENCV_LIBVERSION "${OPENCV_VERSION_MAJOR}.${OPENCV_VERSION_MINOR}.${OPENCV_VERSION_PATCH}")

 # create a dependency on the version file

git add .
git commit -m "opencv change version"
git foramt-patch -1

打补丁

注：通过使用bbapend文件的方式追加补丁到社区的opencv目标中

FILESEXTRAPATHS:prepend := "${THISDIR}/${PN}:" (显式指定patch保存地址)
SRC_URI:append = " file://0001-opencv-change-soname.patch"

ocv_update函数

ocv_update(CMAKE_CONFIGURATION_TYPES "Debug;Release" CACHE STRING "Configs" FORCE)
if(DEFINED CMAKE_BUILD_TYPE)
  set_property( CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS ${CMAKE_CONFIGURATION_TYPES} )
endif()

4. 编译产物中缺少`objdetect` `module`相关资源

检查git下载的源码发现
- tmp/work/cortexa53-crypto-poky-linux/opencv/4.5.5-r0/git存在objdetect.hpp文件
- 但是在tmp/work/cortexa53-crypto-poky-linux/opencv/4.5.5-r0/image/usr/include/opencv4/opencv2下未发现
- 所以猜测是该module未被安装/编译

查找BUILD_opencv_objdectet

/tmp/work/cortexa53-crypto-poky-linux/opencv/4.5.5-r0$ grep -rn 'BUILD_opencv_obj'
git/cmake/vars/OPENCV_DISABLE_THREAD_SUPPORT.cmake:24:ocv_update(BUILD_opencv_objdetect OFF)
git/platforms/wince/readme.md:30:-DBUILD_opencv_objdetect=OFF `
build/CMakeVars.txt:65:BUILD_opencv_objc_bindings_generator=ON
build/CMakeVars.txt:66:BUILD_opencv_objdetect=ON
build/CMakeCache.txt:189:BUILD_opencv_objc_bindings_generator:BOOL=ON
build/CMakeCache.txt:192:BUILD_opencv_objdetect:BOOL=ON

build/CMakeVars.txt和build/CMakeCache.txt中的BUILD_opencv_objdetect均为ON

查看git/cmake/vars/OPENCV_DISABLE_THREAD_SUPPORT.cmake

# Force removal of code conditionally compiled with `#if
# HAVE_PTHREAD`.
ocv_update(HAVE_PTHREAD 0)
...
# These modules require `#include
# <[thread|mutex|condition_variable|future]>` and linkage into
# `libpthread` to work.
ocv_update(BUILD_opencv_objdetect OFF)
ocv_update(BUILD_opencv_gapi OFF)
ocv_update(BUILD_opencv_dnn OFF)

按照错误3中的方法修改ocv_update(BUILD_opencv_objdetect OFF) 为ocv_update(BUILD_opencv_objdetect ON)。制作pathc，添加到*.append文件中
测试发现，该方案无效。产物中还是没有objdetect module相关产物

解决

猜测出现该问题原因为opencv_objdectet模块缺少某些依赖模块(debug发现dnn关联性较大)

在append文件中显式编译dnn模块

PACKAGECONFIG = "eigen jpeg png tbb dnn"           ##显式指定编译某些模块
PACKAGES:remove = "${PN}-samples ${PN}-java python-opencv python3-opencv"

[yocto]yocto编译opencv4.5编译报错

yocto编译opencv报错

1. undefined reference to `cv::String::deallocate()’

2.链接目标版本不匹配

3.链接rdeps错误

4. 编译产物中缺少objdetect module相关资源

`yocto`编译`opencv`报错

3.链接`rdeps`错误

4. 编译产物中缺少`objdetect` `module`相关资源