查找用于构建OpenCV Android本机库的NDK版本
[英]Find the NDK version used for building OpenCV Android native libraries
问题描述
Suppose I have prebuilt OpenCV Android native libraries, such as this . 
假设我已经预先构建了OpenCV Android本机库，例如this 。 How to find which version of NDK is used for building this? 如何找到用于构建此版本的NDK版本？
I am curios about this because OpenCV 3.4.3 prebuilt Android libraries seems to incompatible (?) with NDK r18. 我对此很好奇，因为OpenCV 3.4.3预先构建的Android库似乎与NDK r18不兼容（？）。
2 个解决方案
解决方案1
1 2018-11-20 06:15:01
OpenCV library contained this information. OpenCV库包含此信息。 Open the prebuilt library in Notepad++ and search for "General configuration for OpenCV". 在Notepad ++中打开预构建的库，然后搜索“ OpenCV的常规配置”。
解决方案2
1 2018-11-28 17:11:47
Assuming it was built with a new enough version of the NDK (I don't remember exactly when we added this, but it's been a year or two), there's an ELF note baked into the binaries. 假设它是使用足够新版本的NDK构建的（我不记得我们何时添加它，但是已经过了一两年了），二进制文件中包含了ELF注释。 Can use https://android.googlesource.com/platform/ndk/+/master/parse_elfnote.py to parse it. 可以使用https://android.googlesource.com/platform/ndk/+/master/parse_elfnote.py进行解析。 It'll show you something like the following: 它会向您显示如下内容：
$ python parse_elfnote.py $NDK/sources/cxx-stl/llvm-libc++/libs/arm64-v8a/libc++_shared.so
----------ABI INFO----------
ABI_ANDROID_API: 21
ABI_NDK_VERSION: r18
ABI_NDK_BUILD_NUMBER: 5002713
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