Hey,
actually I had some time trying out if the library works and I was wrong
- it does not work. The library throws many undefined reference errors
when I'm not using LOCAL_ALLOW_UNDEFINED_SYMBOLS := true
In the case I'm using it, my program will crash on startup with the error
"cannot locate symbol
"_ZN6google8protobuf15UnknownFieldSet13ClearFallbackEv".
I'm just loading both static libraries - sodium and zmq - into my
project like I normally do with libraries.
Probably someone has another Idea why zeromq does not work with the NDK.
With Regards,
Matthias
Am 06.03.2015 um 19:25 schrieb Matthias Brzezinski:
Hey Joe,
thank you for your answer.
I've looked through your script and it helped me verifying that I did
not miss a flag, a step or something i was not considering yet.
Generally it doesn't matter if I compile a static or a shared library
- The NDK uses its own linker to link the prebuilt libraries.
Am 06.03.2015 um 18:17 schrieb Joe McIlvain:
Matthias,
I don't usually compile them as static, but you may be able to get
some ideas/help from using or looking at the scripts I added under
`builds/qt-android`of the zeromq repository. I use these to compile
for use with Qt on android, but there's nothing really Qt-specific
about them. I only added them because the android scripts didn't
work for me. They didn't seem to be
The syntax for the android makefiles are a bit different, but I used
the same flags as far I can see. Hence, I never worked with qt before.
What exactly didn't work with the android scripts? Did you have
problems getting the NDK to work generally, or just the NDK in
combination with ZeroMQ? I hope for the first, because it would be a
mess if I wouldn't find a way to use ZeroMQ with native code and the
NDK where for example the protobuf library compiled on the first try.
With regards,
Matthias
maintained, but I didn't want to clobber something that someone out
there might be relying on.
I don't know a lot about the android toolchain because working with
Qt hides a lot of the platform-specific stuff from me, but I learned
just enough about the toolchain to make those scripts work and get
them into the CI for the repository.
On Fri, Mar 6, 2015 at 6:30 AM, Matthias Brzezinski
<[email protected] <mailto:[email protected]>> wrote:
Hey,
I'm having issues linking ZeroMQ into my shared library for Android.
I followed the steps on http://zeromq.org/build:android to build
the static library. I tried it with the recommended NDKr8 but
also tried it with the NDK10d. I've build the static library for
arm with the official ndk-toolchain.
Afterwards I try to link thoose libraries into my shared library
to compile a bunch of cpp files.
I've successfully compiled and linked different static libraries
into my projects so I'm pretty confused why the linker throws the
Error when I work with ZeroMQ. I've omitted the other working
libraries.
My Android.mk:
http://pastebin.com/N7gueqre
My Application.mk:
http://pastebin.com/nNgCYM2F
In both code blocks I've ommited everything that is not necessary
for solving this issue. The error message stays the same. I've
tried to build the shared library under windows and later under
debian and ubuntu. The error message is:
/tmp/android-ndk-r10d/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.9/../../../../arm-linux-androideabi/bin/ld:
error: ./zmq/lib /libzmq.a(libzmq_la-zmq.o): incompatible target
collect2: error: ld returned 1 exit status
make: *** [obj/local/armeabi/libzmqTest.so] Error 1
(I guess 3 lines are not worth a pastebin)
I'm working on Windows 8.1 with Android Studio 1.1. I've compiled
the libraries under Linux Mint 16, a up-to-date ubuntu system and
an old debian server.
I build zeromq3-x and zeromq4-x.
Any idea is welcome and appreciated.
If this is not the right place to ask such a question, please
tell me where to ask it instead.
With regards,
Matthias
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