与 Android NDK 中的版本化共享库链接 [英] Linking with versioned shared library in Android NDK

问题描述

我正在尝试通过 loadLibrary 调用在我的 Android 应用程序中加载两个共享库:

I am trying to load two shared libraries in my Android application through the loadLibrary call:

System.loadLibrary("mywrapper");
System.loadLibrary("crypto");

我一直在运行，捕获 `UnsatisfiedLinkError.这是错误的更详细版本.

I keep running catching the `UnsatisfiedLinkError. Here is a more detailed version of the error.

Caused by: java.lang.UnsatisfiedLinkError: Cannot load library: link_image[1969]:
  130 could not load needed library 'libcrypto.so.1.0.0' for 
  'libmywrapper.so' (load_library[1111]: Library 'libcrypto.so.1.0.0' not found)

有什么想法吗?

花了一些时间后，我发现 Android 不支持版本库.有没有人遇到过同样的问题?

After spending some time I found out that Android doesn't support versioned libraries. Has any one faced the same issue?

推荐答案

我在为Android构建libwebsockets时遇到了同样的问题，需要与OpenSSL链接.我以 libssl.so 为例.您应该对相关的 .so 文件执行相同的操作.

I had the same problem on building libwebsockets for Android, which needs to link with OpenSSL. I use libssl.so as example. You should do the same for related .so files.

Before:
huiying@huiying-PORTEGE-R835:~$ objdump -p libssl.so | grep so
libssl.so:     file format elf32-little
  NEEDED               libcrypto.so.1.0.0
  NEEDED               libdl.so
  NEEDED               libc.so
  SONAME               libssl.so.1.0.0

After 
huiying@huiying-PORTEGE-R835:~$ rpl -R -e .so.1.0.0 "_1_0_0.so" libssl.so 
Replacing ".so.1.0.0" with "_1_0_0.so" (case sensitive) (partial words matched)
.
A Total of 2 matches replaced in 1 file searched.
huiying@huiying-PORTEGE-R835:~$ objdump -p libssl.so | grep so
libssl.so:     file format elf32-little
  NEEDED               libcrypto_1_0_0.so
  NEEDED               libdl.so
  NEEDED               libc.so
  SONAME               libssl_1_0_0.so

And don't forget to change file name "libssl.so" to "libssl_1_0_0.so".

破解有效.我已经运行 Android 应用程序来证明这一点.在 http://computervisionandjava.blogspot.com 查看我的咆哮/2015/05/trouble-with-versioned-shared-libraries.html.

The hack works. I have running Android app to prove it. See my rant at http://computervisionandjava.blogspot.com/2015/05/trouble-with-versioned-shared-libraries.html.

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