compile avahi to generate shared libraries for Android

a_so

Hello, I would like to deploy my Qt 5.8 application to my Android phone (android-21). During step make I get the error messages below. The project uses Avahi for mDNS services. I guess this can be resolved by building avahi for arm architecture.

/media/qt5-qwt6/ndk10/android-ndk-r10e/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.9/../../../../arm-linux-androideabi/bin/ld: error: cannot find -ldns_sd
../sozius-client/so_bonjourservicebrowser.cpp:57: error: undefined reference to 'DNSServiceRefDeallocate'
../sozius-client/so_bonjourservicebrowser.cpp:92: error: undefined reference to 'DNSServiceBrowse'
../sozius-client/so_bonjourservicebrowser.cpp:103: error: undefined reference to 'DNSServiceRefSockFD'
../sozius-client/so_bonjourservicebrowser.cpp:138: error: undefined reference to 'DNSServiceProcessResult'
../sozius-client/so_bonjourserviceresolver.cpp:79: error: undefined reference to 'DNSServiceRefDeallocate'
../sozius-client/so_bonjourserviceresolver.cpp:121: error: undefined reference to 'DNSServiceResolve'
../sozius-client/so_bonjourserviceresolver.cpp:132: error: undefined reference to 'DNSServiceRefSockFD'
../sozius-client/so_bonjourserviceresolver.cpp:169: error: undefined reference to 'DNSServiceProcessResult'
../sozius-client/so_bonjourservicereconfirmer.cpp:46: error: undefined reference to 'DNSServiceQueryRecord'
../sozius-client/so_bonjourservicereconfirmer.cpp:57: error: undefined reference to 'DNSServiceRefSockFD'
../sozius-client/so_bonjourservicereconfirmer.cpp:104: error: undefined reference to 'DNSServiceProcessResult'
../sozius-client/so_bonjourservicereconfirmer.cpp:122: error: undefined reference to 'DNSServiceConstructFullName'
../sozius-client/so_bonjourservicereconfirmer.cpp:140: error: undefined reference to 'DNSServiceRefDeallocate'
../sozius-client/so_bonjourservicereconfirmer.cpp:161: error: undefined reference to 'DNSServiceReconfirmRecord'
../sozius-client/so_bonjourservicequeryrecord.cpp:84: error: undefined reference to 'DNSServiceQueryRecord'
../sozius-client/so_bonjourservicequeryrecord.cpp:99: error: undefined reference to 'DNSServiceRefSockFD'
../sozius-client/so_bonjourservicequeryrecord.cpp:133: error: undefined reference to 'DNSServiceProcessResult'
../sozius-client/so_bonjourservicequeryrecord.cpp:145: error: undefined reference to 'DNSServiceRefDeallocate'
../sozius-client/so_bonjourservice.cpp:43: error: undefined reference to 'TXTRecordGetCount'
../sozius-client/so_bonjourservice.cpp:47: error: undefined reference to 'TXTRecordGetItemAtIndex'
../sozius-client/so_bonjourservice.cpp:229: error: undefined reference to 'DNSServiceConstructFullName'
collect2: error: ld returned 1 exit status
make: *** [../build/Linux/debug/libsozius-client.so] Error 1
16:38:47: The process "/usr/bin/make" exited with code 2.
Error while building/deploying project sozius-client (kit: Android for armeabi-v7a (GCC 4.9, Qt 5.8.0))
When executing step "Make"
16:38:47: Elapsed time: 00:06.

What I have tried so far is in accordance to this link:
Utilize Avahi Libraries in Android for mDNS Discovering

configure step:

./configure --prefix=/home/staff/Desktop/avahi_compile --sysconfdir=/home/staff/Desktop/avahi_compile/etc --localstatedir=/home/staff/Desktop/avahi_compile/var --disable-static --disable-mono --disable-monodoc  --disable-gdbm --enable-libdaemon --disable-nls --disable-gtk --disable-gtk3 --disable-python --disable-qt3 --disable-qt4 --enable-core-docs --with-distro=none --enable-compat-libdns_sd --build=x86_64-pc-linux-gnu --host=arm-linux-androideabi --target=arm-linux-androideabi CC=/media/qt5-qwt6/ndk10/android-ndk-r10e/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc CXX=/media/qt5-qwt6/ndk10/android-ndk-r10e/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-g++ LD=/media/qt5-qwt6/ndk10/android-ndk-r10e/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-ld

config.log output:

configure:4056: checking whether the C compiler works
configure:4078: /media/qt5-qwt6/ndk10/android-ndk-r10e/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc    conftest.c  >&5
/media/qt5-qwt6/ndk10/android-ndk-r10e/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.9/../../../../arm-linux-androideabi/bin/ld: error: cannot open crtbegin_dynamic.o: No such file or directory
/media/qt5-qwt6/ndk10/android-ndk-r10e/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.9/../../../../arm-linux-androideabi/bin/ld: error: cannot open crtend_android.o: No such file or directory
/media/qt5-qwt6/ndk10/android-ndk-r10e/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.9/../../../../arm-linux-androideabi/bin/ld: error: cannot find -lc
/media/qt5-qwt6/ndk10/android-ndk-r10e/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.9/../../../../arm-linux-androideabi/bin/ld: error: cannot find -ldl
collect2: error: ld returned 1 exit status
configure:4082: $? = 1
configure:4120: result: no

Could anyone explain me the bigger picture here? Where should these files be located?

SGaist

Hi,

Not really Qt related but from a quick search if found this.

Hope it helps

a_so

Thanks a lot! The error is gone.

What I did was set environment variables :

PATH=$PATH:/media/qt5-qwt6/tools25/tools
PATH=$PATH:/media/qt5-qwt6/tools25/platform-tools
PATH=$PATH:/media/qt5-qwt6/ndk10/android-ndk-r10e/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin
export LD=arm-linux-androideabi-ld
export CPP=arm-linux-androideabi-cpp
export CC=arm-linux-androideabi-gcc
export CXX=arm-linux-androideabi-g++
export AS=arm-linux-androideabi-as
export AR=arm-linux-androideabi-ar
export RANLIB=arm-linux-androideabi-ranlib
export ANDROID_SYSROOT=/media/qt5-qwt6/ndk10/android-ndk-r10e/platforms/android-4/arch-arm
export CPPFLAGS="--sysroot=$ANDROID_SYSROOT"
export CFLAGS="--sysroot=$ANDROID_SYSROOT"
export CXXFLAGS="--sysroot=$ANDROID_SYSROOT"

And this is my configure command:

./configure --prefix=/home/staff/Desktop/avahi_compile --sysconfdir=/home/staff/Desktop/avahi_compile/etc --localstatedir=/home/staff/Desktop/avahi_compile/var --disable-static --disable-mono --disable-monodoc  --disable-gdbm --enable-libdaemon --disable-nls --disable-gtk --disable-gtk3 --disable-python --disable-qt3 --disable-qt4 --enable-core-docs --with-distro=none --enable-compat-libdns_sd --build=x86_64-pc-linux-gnu --host=arm-linux-androideabi --target=arm-linux-androideabi --with-sysroot=/media/qt5-qwt6/ndk10/android-ndk-r10e/platforms/android-4/arch-arm --with-xml=expat

a_so

Yet now I face the next problem:

configure: error: *** libexpat requested, but not found ***

Expat header, source files and shared libraries are definitely installed on my linux system but it is x86_64 architecture and not arm.
What I do is try to compile expat 2.2.0 for arm but I was not successful yet.

This is what I did for expat compiling:

PATH=$PATH:/media/qt5-qwt6/tools25/tools
PATH=$PATH:/media/qt5-qwt6/tools25/platform-tools
PATH=$PATH:/media/qt5-qwt6/ndk10/android-ndk-r10e/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin
export LD=arm-linux-androideabi-ld
export CPP=arm-linux-androideabi-cpp
export CC=arm-linux-androideabi-gcc
export CXX=arm-linux-androideabi-g++
export AS=arm-linux-androideabi-as
export AR=arm-linux-androideabi-ar
export RANLIB=arm-linux-androideabi-ranlib
export ANDROID_SYSROOT=/media/qt5-qwt6/ndk10/android-ndk-r10e/platforms/android-4/arch-arm
export CPPFLAGS="--sysroot=$ANDROID_SYSROOT"
export CFLAGS="--sysroot=$ANDROID_SYSROOT"
export CXXFLAGS="--sysroot=$ANDROID_SYSROOT"

configure step:

./configure --prefix=/home/staff/Desktop/expat_built --enable-shared --build=x86_64-pc-linux-gnu --host=arm-linux-androideabi --with-sysroot=/media/qt5-qwt6/ndk10/android-ndk-r10e/platforms/android-4/arch-arm

My arm-linux-androideabi-gcc compiler from Android NDK works and it says we are cross-compiling.
But as given in config.log, file ac_nonexistent.h is not found.

configure:7029: checking how to run the C preprocessor
configure:7099: result: arm-linux-androideabi-cpp
configure:7119: arm-linux-androideabi-cpp --sysroot=/media/qt5-qwt6/ndk10/android-ndk-r10e/platforms/android-4/arch-arm conftest.c
configure:7119: $? = 0
configure:7133: arm-linux-androideabi-cpp --sysroot=/media/qt5-qwt6/ndk10/android-ndk-r10e/platforms/android-4/arch-arm conftest.c
conftest.c:9:28: fatal error: ac_nonexistent.h: No such file or directory
 #include <ac_nonexistent.h>
                            ^
compilation terminated.
configure:7133: $? = 1
configure: failed program was:
| /* confdefs.h */
| #define PACKAGE_NAME "expat"
| #define PACKAGE_TARNAME "expat"
| #define PACKAGE_VERSION "2.2.0"
| #define PACKAGE_STRING "expat 2.2.0"
| #define PACKAGE_BUGREPORT "expat-bugs@libexpat.org"
| #define PACKAGE_URL ""
| /* end confdefs.h.  */
| #include <ac_nonexistent.h>

Where should it be located? Is it another linking problem? Thank you for your help!

jsulm

@a_so said in compile avahi to generate shared libraries for Android:

Expat

You should ask Expat maintainers/developers.

a_so

@jsulm thank you, I already know what the problem is! The error is supposed to occur due to a test case where header file includes are checked.

jsulm

@a_so Yes, it should actually not fail. It is most probably an issue with Expat.