gstreamer on android build help

[Sebastian Dröge]

On Di, 2014-04-29 at 13:56 +0200, Lee Matthews wrote:
> [...]
> I've tried using the NDK method by taking the android tutorial-1.c code, adding the plugins that I wish to use in my final application. 
> The shared library builds ok, but when I try linking it to my application in eclipse, I get the following errors :
> 
> ---
> 
> /home/lma/Development/buildroot-2014.02/output/host/opt/ext-toolchain/bin/../lib/gcc/arm-none-linux-gnueabi/4.7.3/../../../../arm-none-linux-gnueabi/bin/ld: warning: libc.so, needed by /home/lma/tmp/libs/armeabi/libgstreamer_android.so, not found (try using -rpath or -rpath-link)
> /home/lma/Development/buildroot-2014.02/output/host/opt/ext-toolchain/bin/../lib/gcc/arm-none-linux-gnueabi/4.7.3/../../../../arm-none-linux-gnueabi/bin/ld: warning: libOpenSLES.so, needed by /home/lma/tmp/libs/armeabi/libgstreamer_android.so, not found (try using -rpath or -rpath-link)
> /home/lma/Development/buildroot-2014.02/output/host/opt/ext-toolchain/bin/../lib/gcc/arm-none-linux-gnueabi/4.7.3/../../../../arm-none-linux-gnueabi/bin/ld: warning: liblog.so, needed by /home/lma/tmp/libs/armeabi/libgstreamer_android.so, not found (try using -rpath or -rpath-link)
> ./src/audio-sink-opensles.o: In function `main':
> [...]

You have to tell Eclipse that it needs to link all the required Android
libraries that the linker complains about now to your application.

> ---
> 
> I've also tried building the gstreamer library using libtool. I downloaded the binary files : gstreamer-1.0-android-arm-1.2.4.1-debug.zip
> 
> I then tried linking the static libraries to produce one static library that I could link with my code in eclipse.
> 
> libtool --tag=CC --mode=link arm-none-linux-gnueabi-gcc -static -o libgstreamer.a libgstcoreelements.a libgstopensles.a libgstaudioconvert.a libgstogg.a libgstopus.a libgstudp.a
> 
> If I run readelf afterwards I get :

This not how you build a static library from multiple other static
libraries. If you run ndk-build with LIBTOOL_DEBUG=1 you will see all
the commandlines that it runs to build a static library.

Also readelf only works on ELF shared libraries IIRC.

-- 
Sebastian Dröge, Centricular Ltd - http://www.centricular.com
Expertise, Straight from the Source
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