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BennyP
BennyP

Reputation: 1807

lg g4 can't find gnustl_shared when using system load in android

I am loading an ndk module dependent on libgnustl_shared.so

I am calling both mylib.so and gnustl_shared using: 

System.load("/data/data/package/files/libgnustl_shared.so");
System.load("/data/data/package/files/mylib.so");

from an external package, due to product requirements (and not from jniLibs - loadlibrary)

It works like a charm on every device however on lg g4 armv8 liba.so can't find libgnustl_shared. It's works fine on other armv8 phones.

How can it happen ? Does any one know how to solve this issue in a generic\spesific way ?

Upvotes: 0

Views: 467

Answers (1)

BennyP
BennyP

Reputation: 1807

found the answer thanks to Alex Cohn

LG G4 devices have libstlport.so in the system/lib64 folder. this lib is another c++ helper run-time. described in : http://developer.android.com/ndk/guides/cpp-support.html

when calling system.load() to libgnustl_shared.so, the device called libstlport from lib64 instead of the path specified. since the jni module isn't built on libstlport and it has different code inside mylib.so couldn't handle the situation

solution:

  1. compile the jni libs with gnustl_static

    • pros : genarates one .so and can be called onces
    • cons: if you have more than one .so dependent on gnu, it can cause a memory leak

  2. call both libgnustl_shared and the compiled library (mylib.so) from the scope of the main application, and not from the scope of an external library. i.e.:

    System.loadLibrary("gnustl_shared"); System.loadLibrary("your_native_library");

Upvotes: 1

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