Android Studio CMake-共享库缺少libc ++ _ shared.so? CMake可以捆绑吗?

问题描述

现在，Android Studio 2.2正式发布了，我正在从旧的ndk-build进程中迁移，以尝试在AS中使用CMake.由于我要整合公司内部(我无法编辑)的几个代码库，这些代码库大量使用C ++ 11代码(包括可怕的std :: to_string()方法)，因此唯一可以编译的方法是选择一些配置选项-我在开始使用ndk-build时就已经发现了所有这些选项. (请参见下文)

Now that Android Studio 2.2 is released officially, I'm migrating from my old ndk-build process to try and use CMake within AS. As I'm incorporating several codebases from within my company (that I can't edit) that make heavy use of C++11 code (including the dreaded std::to_string() method), the only way I can compile is with a select few configuration options - all of which I discovered earlier when beginning work with ndk-build. (see below)

因此，所有内容再次编译并构建到APK中-我100％验证了我的输出共享库是否存在于APK中，但我无法成功使用System.loadLibrary('mylibrary')-事实证明，这是因为依赖项 libc ++ _ shared.so 丢失.

So everything compiles again and builds into the APK - and I 100% verify that my output shared library exists in the APK, but I'm unable to successfully use System.loadLibrary('mylibrary') - and it turns out this is because the dependency libc++_shared.so is missing.

在这种情况下，出现以下错误:

As in, I get the following error:

java.lang.UnsatisfiedLinkError: dlopen failed: library "libc++_shared.so" not found

在旧的ndk构建过程中，我总是在输出文件夹中使用2个库( mylibrary.so 和 libc ++ _ shared.so )，从而将其捆绑到应用程序中.看来CMake工具链根本没有捆绑 libc ++ _ shared.so (实际上，在APK中找不到).

In my old ndk-build process, I always wound up with the 2 libraries (mylibrary.so and libc++_shared.so) in my output folder, which thereby got bundled together into the app. It seems the CMake toolchain isn't bundling libc++_shared.so at all (indeed, it's not found in the APK).

我已经为此努力了6个小时.我可以以某种方式使CMake工具链捆绑此缺少的库吗?有任何线索吗?

I've been banging my head on this for 6 hours. Can I somehow get the CMake toolchain to bundle this missing library? Any clues?

.

.

我的设置:

在gradle.build中:

In gradle.build:

externalNativeBuild {
        cmake {
            arguments '-DANDROID_STL=c++_shared', '-DANDROID_TOOLCHAIN=gcc', '-DANDROID_PLATFORM=android-16'
        }
    }

还有我的CMakeLists.txt(为简洁起见，删除了文件名):

And my CMakeLists.txt (filenames cut out for brevity):

cmake_minimum_required(VERSION 3.4.1)

set(CMAKE_CXX_FLAGS "${CMAKE_C_FLAGS} -std=gnu++11")

include_directories(.)
include_directories(./other)

set(my_SRCS jniInterface.cpp
    etc.cpp)


add_library(mylibrary SHARED ${my_SRCS})

target_link_libraries(mylibrary atomic log)

推荐答案

我写了一个CMake配置，该配置应打包STL文件: https://github.com/jomof/ndk- stl/blob/master/ndk-stl-config.cmake

I wrote a CMake config that should package the STL files:https://github.com/jomof/ndk-stl/blob/master/ndk-stl-config.cmake

将此文件复制到CMakeLists.txt旁边并在CMakeLists.txt内部

Copy this file next to your CMakeLists.txt and inside CMakeLists.txt do

include(ndk-stl-config.cmake)

让我知道您是否有问题

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