Misconfiguration for Android 4.1 and platform plugin android-8?

[BogDan]

Hi,

  For android API-9+ you should use android-9 plugin instead, android-8 it must be 
use only on Android API 8, starting with API-9 AAssetManager_xxxxx methods have
public APIs that why we have different plugins.

Cheers,
BogDan.



----- Original Message -----
> From: Alex Leutgöb <privat at alexleutgoeb.com>
> To: necessitas-devel at kde.org
> Cc: 
> Sent: Wednesday, October 3, 2012 1:45 PM
> Subject: Misconfiguration for Android 4.1 and platform plugin android-8?
> 
> Hi all,
> 
> I usually build my Necessitas-based apps using the libraries from the installer 
> and linking them by myself. Due to compatibility reasons I use the platform 
> plugin android(GL)-8. There was no problem at all till updating my Nexus 7 to 
> Android 4.1.1 (also verified this with a Galaxy Nexus 4.1.1). Since then my apps 
> crash on startup while "trying to load lib libandroid-8.so" with the 
> message:
> 
> 10-03 12:13:29.525: E/AndroidRuntime(2523): Caused by: 
> java.lang.UnsatisfiedLinkError: Cannot load library: reloc_library[1306]:   124 
> cannot locate '_ZN7android12AssetManager7openDirEPKc'...
> 
> So I did a bit of investigation regarding this symbol in the different Android 
> versions.
> 
> Using nm and looking for the missing symbol within the pre-installed libraries:
> 
> 
> v2.3 (Galaxy Ace / Huawei Ascend G300):
> #################################
> 
> libandroid.so
>          U _ZN7android12AssetManager7openDirEPKc
> libandroid_runtime.so
>          U _ZN7android12AssetManager7openDirEPKc
> libutils.so
> 000131f4 T _ZN7android12AssetManager7openDirEPKc
> 
> 
> v4.0.3 (Emulator):
> ##############
> 
> libandroid.so
>          U _ZN7android12AssetManager7openDirEPKc
> libandroid_runtime.so
>          U _ZN7android12AssetManager7openDirEPKc
> libutils.so
> 000161f4 T _ZN7android12AssetManager7openDirEPKc
> 
> 
> 4.1 (Nexus 7):
> ###########
> 
> libandroid.so
>          U _ZN7android12AssetManager7openDirEPKc
> libandroid_runtime.so
>          U _ZN7android12AssetManager7openDirEPKc
> libandroidfw.so
> 00018490 T _ZN7android12AssetManager7openDirEPKc
> 
> 
> So from my understanding "U" (undefined) means that the library links 
> to this symbol, it's however not included in the lib; "T" means an 
> entry in the (textual) symbol table, meaning it is included. As we can see the 
> symbol moved from libutils to libandroidfw in 4.1, reading information from the 
> "android-8.pro" the library only links to libutils 
> ("-lutils").
> 
> If I'm using android-9 everything is working (android-9 is linking against 
> "-landroid" not "-lutils"), so I also used read-elf to check 
> symbol visibility between the installer shipped platform plugins:
> 
> libandroid-8.so
> 0xcd9c <AAssetManager_openDir>: @0x4cad8
> 4880: 0000cd9d    48 FUNC    LOCAL  HIDDEN     8 AAssetManager_openDir
> 
> libandroid-9.so
> 00067e18  00017716 R_ARM_JUMP_SLOT   00000000   AAssetManager_openDir
> 375: 00000000     0 FUNC    GLOBAL DEFAULT  UND AAssetManager_openDir
> 923: 00000000     0 FUNC    GLOBAL DEFAULT  UND AAssetManager_openDir
> 
> Telling me that the symbol is hidden in android-8 (although there exists an 
> "asset_manager.cpp" file in android-8 sources.
> 
> 
> So to recap (sorry for the long explanation!), it would be of interest if 
> someone of you guys can reproduce the linker error at runtime (android-8 on 
> Android 4.1). Is this probably a misconfiguration of the current platform 
> plugin? Do we need to link android-8 against android.so (like android-9 does) 
> too?
> 
> Many thanks,
> Alex
> 
> 
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