OpenCV 2.4.3+与libstdc ++为iOS？ [英] OpenCV 2.4.3+ with libstdc++ for iOS?

问题描述

我试图在现有的iOS项目中包含最新版本的OpenCV，并且有链接器错误，因为我的XCode项目设置为使用libstdc ++而不是libc ++ / C ++ 11支持。

我已经看到其他几个人通过启用libc ++修复错误。示例：

• 将Xcode升级到4.5.2和OpenCV升级到2.4.3后的链接器错误


• 如何使用OpenCV解决iOS链接错误
• 
  

但是，我需要使用libstdc ++，因为我有其他第三方库已经编译的旧stdlib（不能更改） 。有没有办法编译OpenCV 2.4.3+没有-stdlib = libc ++？有没有特殊的标志传递给CMake？或者到OpenCV源代码的ios文件夹中的build_framework.py脚本？

或者，是否有任何二进制版本可用？似乎所有可以从OpenCV下载的都假定为libc ++ / C ++ 11.

解决方案

在openCV的源文件中找到这个文件： p>

  ios / cmake / Modules / Platform / iOS.cmake 
  

更改此行：

 设置（CMAKE_CXX_FLAGS-stdlib = libc ++ -headerpad_max_install_names -fvisibility = hidden -fvisibility-inlines-hidden）
  

到：

  set（CMAKE_CXX_FLAGS-stdlib = libstdc ++ -headerpad_max_install_names -fvisibility = hidden -fvisibility-inlines-hidden）
  

使用python脚本编译

  ios / build_framework 
 
 
I'm trying to include a recent version of OpenCV into an existing iOS project and am having linker errors because my XCode project is set to use libstdc++ and not libc++ / C++ 11 support.

I have seen several other people who have fixed their errors by enabling libc++. Examples:


Linker errors after upgrading Xcode to 4.5.2 and OpenCV to 2.4.3
How to resolve iOS Link errors with OpenCV


However, I NEED to use libstdc++ because I have other 3rd party libraries which are already compiled with the older stdlib (can't be changed). Is there a way to compile OpenCV 2.4.3+ without -stdlib=libc++ ? Are there special flags to pass to CMake? or to the build_framework.py script that comes in the ios folder of the OpenCV source code?

Alternatively, does anyone have a binary version available? It seems all downloadable from OpenCV assume libc++ / C++11.
解决方案
In the source for openCV locate this file:
ios/cmake/Modules/Platform/iOS.cmake
Change this line:
set (CMAKE_CXX_FLAGS "-stdlib=libc++ -headerpad_max_install_names -fvisibility=hidden -fvisibility-inlines-hidden")
to:  
set (CMAKE_CXX_FLAGS "-stdlib=libstdc++ -headerpad_max_install_names -fvisibility=hidden -fvisibility-inlines-hidden")
Compile using the python script 
ios/build_framework.py
Then you should be good to go

I have just tried this on 2.4.3 source, swapped in the resulting framework on an existing project, changed the C++ standard library for the project to libstdc++ and it runs fine.

                        
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