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  4. protobuf/lib: pread failed: is a directory, cross-compilation, deploy client application to Android phone
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protobuf/lib: pread failed: is a directory, cross-compilation, deploy client application to Android phone

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  • A a_so

    Hello, I try to run a client application on an Android phone. I use Qt 5.8 for Android on Centos 6 x86-64, qwt 6.3.1 and protobuf 2.5.0.
    I cross-compiled protobuf for arm-linux-androideabi.
    Configure step:

    sudo ./configure --prefix=/media/qt5-qwt6/android_sdk/protobuf_android --target=arm-linux-androideabi --enable-cross-compile --with-protoc=protoc --with-sysroot=/media/qt5-qwt6/android_sdk/Sdk/ndk-bundle/sysroot

    I use compiler Android GCC(arm-4.9). But at step make, I get the Error:

    /media/qt5-qwt6/android_sdk/Sdk/ndk-bundle/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-androideabi/bin/ld: fatal error: /media/qt5-qwt6/android_sdk/protobuf_android/lib: pread failed: Is a directory
collect2: error: ld returned 1 exit status
make: *** [../build/Linux/release/libsozius-client.so] Error 1
16:24:24: 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"
16:24:24: Elapsed time: 00:05.

    /protobuf_android/lib includes static and shared libraries:

    libprotobuf.a libprotobuf-lite.so.8.0.0 libprotoc.so
    libprotobuf.la libprotobuf.so libprotoc.so.8
    libprotobuf-lite.a libprotobuf.so.8 libprotoc.so.8.0.0
    libprotobuf-lite.la libprotobuf.so.8.0.0 pkgconfig
    libprotobuf-lite.so libprotoc.a
    libprotobuf-lite.so.8 libprotoc.la

    my .pri file looks the following:

    
android {
message(Building for ANDROID - $$_DATE_)

#ID's
_BUILD_ID = $$system($$PWD/../scripts/source_id_linux.sh client_source)
_PROTOC_ID = $$system($$PWD/../scripts/source_id_linux.sh proto)

equals(_BUILD_ID, "") {
    error("BUILD_ID not set, check source_id scripts")
}
equals(_PROTOC_ID, "") {
    error("PROTOC_ID not set, check source_id scripts")
}

DEFINES += "BUILD_ID=\\\"$$_BUILD_ID"\\\"
DEFINES += "PROTOC_ID=\\\"$$_PROTOC_ID\\\""

#Qwt support
include("/media/qt5-qwt6/qwt_android/qwt_installed-6.1.3/features/qwt.prf")

#Adding Avahi/Bonjour support
#!mac:x11:LIBS += -ldns_sd

#qwt support
LIBS += -L /media/qt5-qwt6/qwt_android/qwt-6.1.3/lib -lqwt
INCLUDEPATH += /media/qt5-qwt6/qwt_android/qwt_installed-6.1.3/include

#Bonjour/Avahi support
LIBS += -ldns_sd

#Protobuf support
LIBS += -L /media/qt5-qwt6/android_sdk/protobuf_android/lib -lprotobuf
INCLUDEPATH += /media/qt5-qwt6/android_sdk/protobuf_android/include

#Clean Files (use: make distclean)
QMAKE_DISTCLEAN += -r $$DESTDIR

}

    I have already tried to call libprotobuf.so in the path but that leads to -ldns_sd, -lprotobuf and -lqwt not being detected. I am grateful for any help to overcome this error.

    jsulmJ Offline
    jsulmJ Offline
    jsulm
    Lifetime Qt Champion
    wrote on last edited by
    #2

    @a_so Remove blank between -L and the path to the library:

    LIBS += -L/media/qt5-qwt6/qwt_android/qwt-6.1.3/lib -lqwt
# and here
LIBS += -L/media/qt5-qwt6/android_sdk/protobuf_android/lib -lprotobuf

    https://forum.qt.io/topic/113070/qt-code-of-conduct

    1 Reply Last reply
    0
    • A Offline
      A Offline
      a_so
      wrote on last edited by a_so
      #3

      Hi jsulm!

      I have removed the blanks, but now -ldns_sd and -lprotobuf are not found. This is my compile output.

      /media/qt5-qwt6/android_sdk/Sdk/ndk-bundle/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-androideabi/bin/ld: warning: skipping incompatible /home/staff/Qt5.8.0/5.8/android_armv7/lib/libqwt.so while searching for qwt
/media/qt5-qwt6/android_sdk/Sdk/ndk-bundle/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-androideabi/bin/ld: error: cannot find -ldns_sd
/media/qt5-qwt6/android_sdk/Sdk/ndk-bundle/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-androideabi/bin/ld: warning: skipping incompatible /media/qt5-qwt6/android_sdk/protobuf_android/lib/libprotobuf.so while searching for protobuf
/media/qt5-qwt6/android_sdk/Sdk/ndk-bundle/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-androideabi/bin/ld: error: cannot find -lprotobuf
      jsulmJ 2 Replies Last reply
      0
      • JohanSoloJ Offline
        JohanSoloJ Offline
        JohanSolo
        wrote on last edited by
        #4

        It looks like your libraries at /media/qt5-qwt6/ are not compatible with the targetted platform. Is it possible you're trying to mix x86 and x64 builds?

        `They did not know it was impossible, so they did it.'
        -- Mark Twain

        1 Reply Last reply
        1
        • A a_so

          Hi jsulm!

          I have removed the blanks, but now -ldns_sd and -lprotobuf are not found. This is my compile output.

          /media/qt5-qwt6/android_sdk/Sdk/ndk-bundle/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-androideabi/bin/ld: warning: skipping incompatible /home/staff/Qt5.8.0/5.8/android_armv7/lib/libqwt.so while searching for qwt
/media/qt5-qwt6/android_sdk/Sdk/ndk-bundle/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-androideabi/bin/ld: error: cannot find -ldns_sd
/media/qt5-qwt6/android_sdk/Sdk/ndk-bundle/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-androideabi/bin/ld: warning: skipping incompatible /media/qt5-qwt6/android_sdk/protobuf_android/lib/libprotobuf.so while searching for protobuf
/media/qt5-qwt6/android_sdk/Sdk/ndk-bundle/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-androideabi/bin/ld: error: cannot find -lprotobuf
          jsulmJ Offline
          jsulmJ Offline
          jsulm
          Lifetime Qt Champion
          wrote on last edited by
          #5

          @a_so What is the exact name of the protobuf library?
          Is it really located in /media/qt5-qwt6/android_sdk/protobuf_android/lib ?

          https://forum.qt.io/topic/113070/qt-code-of-conduct

          1 Reply Last reply
          1
          • A a_so

            Hi jsulm!

            I have removed the blanks, but now -ldns_sd and -lprotobuf are not found. This is my compile output.

            /media/qt5-qwt6/android_sdk/Sdk/ndk-bundle/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-androideabi/bin/ld: warning: skipping incompatible /home/staff/Qt5.8.0/5.8/android_armv7/lib/libqwt.so while searching for qwt
/media/qt5-qwt6/android_sdk/Sdk/ndk-bundle/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-androideabi/bin/ld: error: cannot find -ldns_sd
/media/qt5-qwt6/android_sdk/Sdk/ndk-bundle/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-androideabi/bin/ld: warning: skipping incompatible /media/qt5-qwt6/android_sdk/protobuf_android/lib/libprotobuf.so while searching for protobuf
/media/qt5-qwt6/android_sdk/Sdk/ndk-bundle/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-androideabi/bin/ld: error: cannot find -lprotobuf
            jsulmJ Offline
            jsulmJ Offline
            jsulm
            Lifetime Qt Champion
            wrote on last edited by
            #6

            @a_so To add to @JohanSolo : you can find out for which architecture the lib was build calling:

            file /media/qt5-qwt6/android_sdk/protobuf_android/lib/libprotobuf.so

            https://forum.qt.io/topic/113070/qt-code-of-conduct

            1 Reply Last reply
            0
            • A Offline
              A Offline
              a_so
              wrote on last edited by
              #7

              @jsulm used library is libprotobuf.so.8.0.0 which indeed is under the specified directory.
              I built it for arm-linux-androideabi on my Centos virtual machine following this script

              link text

              My phone uses Android Marshmallow
              Chipset Qualcomm MSM8992 Snapdragon 808
              CPU Hexa-core (4x1.4 GHz Cortex-A53 & 2x1.8 GHz Cortex-A57)

              I am quite new to Qt and this is my first project I try to build for Android.

              jsulmJ 1 Reply Last reply
              0
              • A a_so

                @jsulm used library is libprotobuf.so.8.0.0 which indeed is under the specified directory.
                I built it for arm-linux-androideabi on my Centos virtual machine following this script

                link text

                My phone uses Android Marshmallow
                Chipset Qualcomm MSM8992 Snapdragon 808
                CPU Hexa-core (4x1.4 GHz Cortex-A53 & 2x1.8 GHz Cortex-A57)

                I am quite new to Qt and this is my first project I try to build for Android.

                jsulmJ Offline
                jsulmJ Offline
                jsulm
                Lifetime Qt Champion
                wrote on last edited by
                #8

                @a_so Can you please execute

                file /media/qt5-qwt6/android_sdk/protobuf_android/lib/libprotobuf.so

                and post its output here?

                https://forum.qt.io/topic/113070/qt-code-of-conduct

                1 Reply Last reply
                0
                • A Offline
                  A Offline
                  a_so
                  wrote on last edited by
                  #9

                  output is:

                  /media/qt5-qwt6/android_sdk/protobuf_android/lib/libprotobuf.so: symbolic link to `libprotobuf.so.8.0.0'
                  jsulmJ 1 Reply Last reply
                  0
                  • A a_so

                    output is:

                    /media/qt5-qwt6/android_sdk/protobuf_android/lib/libprotobuf.so: symbolic link to `libprotobuf.so.8.0.0'
                    jsulmJ Offline
                    jsulmJ Offline
                    jsulm
                    Lifetime Qt Champion
                    wrote on last edited by
                    #10

                    @a_so OK, then do:

                    file /media/qt5-qwt6/android_sdk/protobuf_android/lib/libprotobuf.so.8.0.0

                    and post the output here...

                    https://forum.qt.io/topic/113070/qt-code-of-conduct

                    1 Reply Last reply
                    1
                    • A Offline
                      A Offline
                      a_so
                      wrote on last edited by a_so
                      #11 
                      /media/qt5-qwt6/android_sdk/protobuf_android/lib/libprotobuf.so.8.0.0: ELF 64-bit LSB shared object, x86-64, version 1 (SYSV), dynamically linked, BuildID[sha1]=ebd5a270582d8e3188c77f4027be7df7058f5f1d, not stripped

                      for qwt I get the following output:

                      /media/qt5-qwt6/qwt_android/qwt-6.1.3/lib/libqwt.so: ELF 32-bit LSB shared object, ARM, version 1 (SYSV), dynamically linked (uses shared libs), not stripped
                      jsulmJ 1 Reply Last reply
                      0
                      • A a_so 
                        /media/qt5-qwt6/android_sdk/protobuf_android/lib/libprotobuf.so.8.0.0: ELF 64-bit LSB shared object, x86-64, version 1 (SYSV), dynamically linked, BuildID[sha1]=ebd5a270582d8e3188c77f4027be7df7058f5f1d, not stripped

                        for qwt I get the following output:

                        /media/qt5-qwt6/qwt_android/qwt-6.1.3/lib/libqwt.so: ELF 32-bit LSB shared object, ARM, version 1 (SYSV), dynamically linked (uses shared libs), not stripped
                        jsulmJ Offline
                        jsulmJ Offline
                        jsulm
                        Lifetime Qt Champion
                        wrote on last edited by
                        #12

                        @a_so As you can see it is x86_64 binary, not ARM...

                        https://forum.qt.io/topic/113070/qt-code-of-conduct

                        A 1 Reply Last reply
                        1
                        • jsulmJ jsulm

                          @a_so As you can see it is x86_64 binary, not ARM...

                          A Offline
                          A Offline
                          a_so
                          wrote on last edited by
                          #13

                          @jsulm yes, I see. My cross compilation for arm did not work obviously. I will try to compile it again.

                          1 Reply Last reply
                          0
                          • A Offline
                            A Offline
                            a_so
                            wrote on last edited by
                            #14

                            I have managed to cross compile protobuf 2.5.0 for arm-linux-androideabi with this script:

                            #!/bin/bash
export NDK=/media/qt5-qwt6/ndk10/android-ndk-r10e
export SYSROOT=$NDK/platforms/android-21/arch-arm

export TOOLCHAIN=$NDK/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64

export PATH=$PATH:$TOOLCHAIN/bin

export CC="$TOOLCHAIN/bin/arm-linux-androideabi-gcc --sysroot $SYSROOT"
export CXX="$TOOLCHAIN/bin/arm-linux-androideabi-g++ --sysroot $SYSROOT"
export CXXSTL=$NDK/sources/cxx-stl/gnu-libstdc++/4.9

function build_one
{
mkdir build

./configure --prefix=$(pwd)/build \
--host=arm-linux-androideabi \
--with-sysroot=$SYSROOT \
--enable-static \
--disable-shared \
--enable-cross-compile \
--with-protoc=protoc \
CFLAGS="-march=armv7-a" \
CXXFLAGS="-march=armv7-a -I$CXXSTL/include -I$CXXSTL/libs/armeabi-v7a/include -L$CXXSTL/libs/armeabi-v7a/ -lgnustl_static"

make clean
make
make install
}

# pwd is current directory
CPU=arm
PREFIX=$(pwd)/android/$CPU
ADDI_CFLAGS="-marm"
build_one

# Inspect the library architecture specific information
# arm-linux-androideabi-readelf -A build/lib/libprotobuf-lite.a

                            find for protoc delivers:

                            /home/staff/Desktop/protobuf/protobuf-2.5.0/build/bin/protoc: ELF 32-bit LSB executable, ARM, version 1 (SYSV), dynamically linked (uses shared libs), not stripped

                            next step, I linked to the libraries in my Qt project in .pri file:

                            #Protobuf support (arm compiled)
LIBS += -L/home/staff/Desktop/protobuf/protobuf-2.5.0/build/lib -lprotobuf
INCLUDEPATH += /home/staff/Desktop/protobuf/protobuf-2.5.0/build/include

                            #qwt support (armv7)
LIBS += -L/media/qt5-qwt6/lib -lqwt
INCLUDEPATH += /media/qt5-qwt6/include

#Bonjour/Avahi support
LIBS += -L/usr/lib64/libdns_sd.so.1.0.0

#Protobuf support (arm compiled)
LIBS += -L/home/staff/Desktop/protobuf/protobuf-2.5.0/build/lib -lprotobuf
INCLUDEPATH += /home/staff/Desktop/protobuf/protobuf-2.5.0/build/include

                            When I try to run the project on my phone, protobuf is found but I get the following errors:

                            /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: warning: skipping incompatible /home/staff/Qt5.8.0/5.8/android_armv7/lib/libqwt.so while searching for qwt
/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: warning: skipping incompatible /media/qt5-qwt6/lib/libqwt.so while searching for qwt
/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 -lqwt
/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'
../sozius-client/so_infograph_p.cpp:61: error: undefined reference to 'QwtPlot::setAxisTitle(int, QString const&)'
../sozius-client/so_infograph_p.cpp:99: error: undefined reference to 'QwtPlot::setFooter(QString const&)'
../sozius-client/so_infograph_p.cpp:135: error: undefined reference to 'QwtPlot::setAxisScale(int, double, double, double)'
../sozius-client/so_infograph_p.cpp:152: error: undefined reference to 'QwtPlot::setAxisAutoScale(int, bool)'
../sozius-client/so_infograph_p.cpp:157: error: undefined reference to 'QwtPlot::setAxisAutoScale(int, bool)'
../sozius-client/so_infograph_p.cpp:158: error: undefined reference to 'QwtPlot::setAxisScale(int, double, double, double)'
../sozius-client/so_infograph_p.cpp:177: error: undefined reference to 'QwtPlot::setFooter(QString const&)'
../sozius-client/so_infograph_p.cpp:178: error: undefined reference to 'QwtPlot::setCanvasBackground(QBrush const&)'
../sozius-client/so_infograph_p.cpp:179: error: undefined reference to 'QwtPlot::setAxisTitle(int, QString const&)'
../sozius-client/so_infograph_p.cpp:182: error: undefined reference to 'QwtPlot::setAxisScale(int, double, double, double)'
../sozius-client/so_infograph_p.cpp:183: error: undefined reference to 'QwtPlot::setAxisAutoScale(int, bool)'
../sozius-client/so_infograph_p.cpp:186: error: undefined reference to 'QwtPlot::setAxisScale(int, double, double, double)'
../sozius-client/so_infograph_p.cpp:201: error: undefined reference to 'QwtPlotCurve::QwtPlotCurve(QString const&)'
../sozius-client/so_infograph_p.cpp:203: error: undefined reference to 'QwtPlotCurve::setPen(QColor const&, double, Qt::PenStyle)'
../sozius-client/so_infograph_p.cpp:204: error: undefined reference to 'QwtPlotItem::setRenderHint(QwtPlotItem::RenderHint, bool)'
../sozius-client/so_infograph_p.cpp:248: error: undefined reference to 'QwtPlotCurve::setSamples(QVector<QPointF> const&)'
../sozius-client/so_infograph_p.cpp:249: error: undefined reference to 'QwtPlotItem::attach(QwtPlot*)'
../sozius-client/so_qwtplot.cpp:3: error: undefined reference to 'QwtPlot::QwtPlot(QWidget*)'
../build/Linux/debug/.obj/so_qwtplot.o:so_qwtplot.cpp:vtable for so_QwtPlot: error: undefined reference to 'QwtPlot::metaObject() const'
../build/Linux/debug/.obj/so_qwtplot.o:so_qwtplot.cpp:vtable for so_QwtPlot: error: undefined reference to 'QwtPlot::qt_metacast(char const*)'
../build/Linux/debug/.obj/so_qwtplot.o:so_qwtplot.cpp:vtable for so_QwtPlot: error: undefined reference to 'QwtPlot::qt_metacall(QMetaObject::Call, int, void**)'
../build/Linux/debug/.obj/so_qwtplot.o:so_qwtplot.cpp:vtable for so_QwtPlot: error: undefined reference to 'QwtPlot::event(QEvent*)'
../build/Linux/debug/.obj/so_qwtplot.o:so_qwtplot.cpp:vtable for so_QwtPlot: error: undefined reference to 'QwtPlot::eventFilter(QObject*, QEvent*)'
../build/Linux/debug/.obj/so_qwtplot.o:so_qwtplot.cpp:vtable for so_QwtPlot: error: undefined reference to 'QwtPlot::resizeEvent(QResizeEvent*)'
../build/Linux/debug/.obj/so_qwtplot.o:so_qwtplot.cpp:vtable for so_QwtPlot: error: undefined reference to 'QwtPlot::canvasMap(int) const'
../build/Linux/debug/.obj/so_qwtplot.o:so_qwtplot.cpp:vtable for so_QwtPlot: error: undefined reference to 'QwtPlot::updateLayout()'
../build/Linux/debug/.obj/so_qwtplot.o:so_qwtplot.cpp:vtable for so_QwtPlot: error: undefined reference to 'QwtPlot::drawCanvas(QPainter*)'
../build/Linux/debug/.obj/so_qwtplot.o:so_qwtplot.cpp:vtable for so_QwtPlot: error: undefined reference to 'QwtPlot::getCanvasMarginsHint(QwtScaleMap const*, QRectF const&, double&, double&, double&, double&) const'
../build/Linux/debug/.obj/so_qwtplot.o:so_qwtplot.cpp:vtable for so_QwtPlot: error: undefined reference to 'QwtPlot::drawItems(QPainter*, QRectF const&, QwtScaleMap const*) const'
../build/Linux/debug/.obj/so_qwtplot.o:so_qwtplot.cpp:vtable for so_QwtPlot: error: undefined reference to 'QwtPlot::itemToInfo(QwtPlotItem*) const'
../build/Linux/debug/.obj/so_qwtplot.o:so_qwtplot.cpp:vtable for so_QwtPlot: error: undefined reference to 'QwtPlot::infoToItem(QVariant const&) const'
../build/Linux/debug/.obj/so_qwtplot.o:so_qwtplot.cpp:vtable for so_QwtPlot: error: undefined reference to 'QwtPlot::replot()'
../build/Linux/debug/.obj/so_qwtplot.o:so_qwtplot.cpp:typeinfo for so_QwtPlot: error: undefined reference to 'typeinfo for QwtPlot'
../sozius-client/so_qwtplot.h:9: error: undefined reference to 'QwtPlot::~QwtPlot()'
/home/staff/Desktop/protobuf/protobuf-2.5.0/build/lib/libprotobuf.a(strutil.o):strutil.cc:function google::protobuf::safe_strtof(char const*, float*): error: undefined reference to 'strtof'
collect2: error: ld returned 1 exit status
make: *** [../build/Linux/debug/libsozius-client.so] Error 1
12:13:04: 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"
12:13:04: Elapsed time: 02:52.

                            My questions are:

                            1. what architecture/configuration does qwt need? I have several of them on my machine
                            /home/staff/Qt5.8.0/5.8/android_armv7/lib/libqwt.so.6.1.2: ELF 64-bit LSB shared object, x86-64, version 1 (GNU/Linux), dynamically linked, BuildID[sha1]=131bd147d36585511f96ccd14ba1ccdd88c327cc, stripped


                            /media/qt5-qwt6/lib/libqwt.so.6.1.2: ELF 64-bit LSB shared object, x86-64, version 1 (GNU/Linux), dynamically linked, BuildID[sha1]=131bd147d36585511f96ccd14ba1ccdd88c327cc, stripped


                            /media/qt5-qwt6/qwt_android/qwt-6.1.3/lib/libqwt.so: ELF 32-bit LSB shared object, ARM, version 1 (SYSV), dynamically linked (uses shared libs), not stripped
                            1. why is -ldns_sd not found? The dynamic libraries are definitely installed. Is it because they are not static libraries like the ones for protobuf?
                            /usr/lib64/libdns_sd.so
/usr/lib64/libdns_sd.so.1
/usr/lib64/libdns_sd.so.1.0.0

                            Thank you for your patience with me

                            jsulmJ 1 Reply Last reply
                            0
                            • A a_so

                              I have managed to cross compile protobuf 2.5.0 for arm-linux-androideabi with this script:

                              #!/bin/bash
export NDK=/media/qt5-qwt6/ndk10/android-ndk-r10e
export SYSROOT=$NDK/platforms/android-21/arch-arm

export TOOLCHAIN=$NDK/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64

export PATH=$PATH:$TOOLCHAIN/bin

export CC="$TOOLCHAIN/bin/arm-linux-androideabi-gcc --sysroot $SYSROOT"
export CXX="$TOOLCHAIN/bin/arm-linux-androideabi-g++ --sysroot $SYSROOT"
export CXXSTL=$NDK/sources/cxx-stl/gnu-libstdc++/4.9

function build_one
{
mkdir build

./configure --prefix=$(pwd)/build \
--host=arm-linux-androideabi \
--with-sysroot=$SYSROOT \
--enable-static \
--disable-shared \
--enable-cross-compile \
--with-protoc=protoc \
CFLAGS="-march=armv7-a" \
CXXFLAGS="-march=armv7-a -I$CXXSTL/include -I$CXXSTL/libs/armeabi-v7a/include -L$CXXSTL/libs/armeabi-v7a/ -lgnustl_static"

make clean
make
make install
}

# pwd is current directory
CPU=arm
PREFIX=$(pwd)/android/$CPU
ADDI_CFLAGS="-marm"
build_one

# Inspect the library architecture specific information
# arm-linux-androideabi-readelf -A build/lib/libprotobuf-lite.a

                              find for protoc delivers:

                              /home/staff/Desktop/protobuf/protobuf-2.5.0/build/bin/protoc: ELF 32-bit LSB executable, ARM, version 1 (SYSV), dynamically linked (uses shared libs), not stripped

                              next step, I linked to the libraries in my Qt project in .pri file:

                              #Protobuf support (arm compiled)
LIBS += -L/home/staff/Desktop/protobuf/protobuf-2.5.0/build/lib -lprotobuf
INCLUDEPATH += /home/staff/Desktop/protobuf/protobuf-2.5.0/build/include

                              #qwt support (armv7)
LIBS += -L/media/qt5-qwt6/lib -lqwt
INCLUDEPATH += /media/qt5-qwt6/include

#Bonjour/Avahi support
LIBS += -L/usr/lib64/libdns_sd.so.1.0.0

#Protobuf support (arm compiled)
LIBS += -L/home/staff/Desktop/protobuf/protobuf-2.5.0/build/lib -lprotobuf
INCLUDEPATH += /home/staff/Desktop/protobuf/protobuf-2.5.0/build/include

                              When I try to run the project on my phone, protobuf is found but I get the following errors:

                              /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: warning: skipping incompatible /home/staff/Qt5.8.0/5.8/android_armv7/lib/libqwt.so while searching for qwt
/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: warning: skipping incompatible /media/qt5-qwt6/lib/libqwt.so while searching for qwt
/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 -lqwt
/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'
../sozius-client/so_infograph_p.cpp:61: error: undefined reference to 'QwtPlot::setAxisTitle(int, QString const&)'
../sozius-client/so_infograph_p.cpp:99: error: undefined reference to 'QwtPlot::setFooter(QString const&)'
../sozius-client/so_infograph_p.cpp:135: error: undefined reference to 'QwtPlot::setAxisScale(int, double, double, double)'
../sozius-client/so_infograph_p.cpp:152: error: undefined reference to 'QwtPlot::setAxisAutoScale(int, bool)'
../sozius-client/so_infograph_p.cpp:157: error: undefined reference to 'QwtPlot::setAxisAutoScale(int, bool)'
../sozius-client/so_infograph_p.cpp:158: error: undefined reference to 'QwtPlot::setAxisScale(int, double, double, double)'
../sozius-client/so_infograph_p.cpp:177: error: undefined reference to 'QwtPlot::setFooter(QString const&)'
../sozius-client/so_infograph_p.cpp:178: error: undefined reference to 'QwtPlot::setCanvasBackground(QBrush const&)'
../sozius-client/so_infograph_p.cpp:179: error: undefined reference to 'QwtPlot::setAxisTitle(int, QString const&)'
../sozius-client/so_infograph_p.cpp:182: error: undefined reference to 'QwtPlot::setAxisScale(int, double, double, double)'
../sozius-client/so_infograph_p.cpp:183: error: undefined reference to 'QwtPlot::setAxisAutoScale(int, bool)'
../sozius-client/so_infograph_p.cpp:186: error: undefined reference to 'QwtPlot::setAxisScale(int, double, double, double)'
../sozius-client/so_infograph_p.cpp:201: error: undefined reference to 'QwtPlotCurve::QwtPlotCurve(QString const&)'
../sozius-client/so_infograph_p.cpp:203: error: undefined reference to 'QwtPlotCurve::setPen(QColor const&, double, Qt::PenStyle)'
../sozius-client/so_infograph_p.cpp:204: error: undefined reference to 'QwtPlotItem::setRenderHint(QwtPlotItem::RenderHint, bool)'
../sozius-client/so_infograph_p.cpp:248: error: undefined reference to 'QwtPlotCurve::setSamples(QVector<QPointF> const&)'
../sozius-client/so_infograph_p.cpp:249: error: undefined reference to 'QwtPlotItem::attach(QwtPlot*)'
../sozius-client/so_qwtplot.cpp:3: error: undefined reference to 'QwtPlot::QwtPlot(QWidget*)'
../build/Linux/debug/.obj/so_qwtplot.o:so_qwtplot.cpp:vtable for so_QwtPlot: error: undefined reference to 'QwtPlot::metaObject() const'
../build/Linux/debug/.obj/so_qwtplot.o:so_qwtplot.cpp:vtable for so_QwtPlot: error: undefined reference to 'QwtPlot::qt_metacast(char const*)'
../build/Linux/debug/.obj/so_qwtplot.o:so_qwtplot.cpp:vtable for so_QwtPlot: error: undefined reference to 'QwtPlot::qt_metacall(QMetaObject::Call, int, void**)'
../build/Linux/debug/.obj/so_qwtplot.o:so_qwtplot.cpp:vtable for so_QwtPlot: error: undefined reference to 'QwtPlot::event(QEvent*)'
../build/Linux/debug/.obj/so_qwtplot.o:so_qwtplot.cpp:vtable for so_QwtPlot: error: undefined reference to 'QwtPlot::eventFilter(QObject*, QEvent*)'
../build/Linux/debug/.obj/so_qwtplot.o:so_qwtplot.cpp:vtable for so_QwtPlot: error: undefined reference to 'QwtPlot::resizeEvent(QResizeEvent*)'
../build/Linux/debug/.obj/so_qwtplot.o:so_qwtplot.cpp:vtable for so_QwtPlot: error: undefined reference to 'QwtPlot::canvasMap(int) const'
../build/Linux/debug/.obj/so_qwtplot.o:so_qwtplot.cpp:vtable for so_QwtPlot: error: undefined reference to 'QwtPlot::updateLayout()'
../build/Linux/debug/.obj/so_qwtplot.o:so_qwtplot.cpp:vtable for so_QwtPlot: error: undefined reference to 'QwtPlot::drawCanvas(QPainter*)'
../build/Linux/debug/.obj/so_qwtplot.o:so_qwtplot.cpp:vtable for so_QwtPlot: error: undefined reference to 'QwtPlot::getCanvasMarginsHint(QwtScaleMap const*, QRectF const&, double&, double&, double&, double&) const'
../build/Linux/debug/.obj/so_qwtplot.o:so_qwtplot.cpp:vtable for so_QwtPlot: error: undefined reference to 'QwtPlot::drawItems(QPainter*, QRectF const&, QwtScaleMap const*) const'
../build/Linux/debug/.obj/so_qwtplot.o:so_qwtplot.cpp:vtable for so_QwtPlot: error: undefined reference to 'QwtPlot::itemToInfo(QwtPlotItem*) const'
../build/Linux/debug/.obj/so_qwtplot.o:so_qwtplot.cpp:vtable for so_QwtPlot: error: undefined reference to 'QwtPlot::infoToItem(QVariant const&) const'
../build/Linux/debug/.obj/so_qwtplot.o:so_qwtplot.cpp:vtable for so_QwtPlot: error: undefined reference to 'QwtPlot::replot()'
../build/Linux/debug/.obj/so_qwtplot.o:so_qwtplot.cpp:typeinfo for so_QwtPlot: error: undefined reference to 'typeinfo for QwtPlot'
../sozius-client/so_qwtplot.h:9: error: undefined reference to 'QwtPlot::~QwtPlot()'
/home/staff/Desktop/protobuf/protobuf-2.5.0/build/lib/libprotobuf.a(strutil.o):strutil.cc:function google::protobuf::safe_strtof(char const*, float*): error: undefined reference to 'strtof'
collect2: error: ld returned 1 exit status
make: *** [../build/Linux/debug/libsozius-client.so] Error 1
12:13:04: 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"
12:13:04: Elapsed time: 02:52.

                              My questions are:

                              1. what architecture/configuration does qwt need? I have several of them on my machine
                              /home/staff/Qt5.8.0/5.8/android_armv7/lib/libqwt.so.6.1.2: ELF 64-bit LSB shared object, x86-64, version 1 (GNU/Linux), dynamically linked, BuildID[sha1]=131bd147d36585511f96ccd14ba1ccdd88c327cc, stripped


                              /media/qt5-qwt6/lib/libqwt.so.6.1.2: ELF 64-bit LSB shared object, x86-64, version 1 (GNU/Linux), dynamically linked, BuildID[sha1]=131bd147d36585511f96ccd14ba1ccdd88c327cc, stripped


                              /media/qt5-qwt6/qwt_android/qwt-6.1.3/lib/libqwt.so: ELF 32-bit LSB shared object, ARM, version 1 (SYSV), dynamically linked (uses shared libs), not stripped
                              1. why is -ldns_sd not found? The dynamic libraries are definitely installed. Is it because they are not static libraries like the ones for protobuf?
                              /usr/lib64/libdns_sd.so
/usr/lib64/libdns_sd.so.1
/usr/lib64/libdns_sd.so.1.0.0

                              Thank you for your patience with me

                              jsulmJ Offline
                              jsulmJ Offline
                              jsulm
                              Lifetime Qt Champion
                              wrote on last edited by jsulm
                              #15

                              @a_so You need ARM build of libqwt (same as protobuf) as you're going to use it on an ARM processor, right?
                              Fix your pro file:

                              LIBS += -L/media/qt5-qwt6/qwt_android/qwt-6.1.3/lib -lqwt
INCLUDEPATH += /media/qt5-qwt6/qwt_android/qwt-6.1.3/include

                              Are those directories on your host machine?

                              /usr/lib64/libdns_sd.so
/usr/lib64/libdns_sd.so.1
/usr/lib64/libdns_sd.so.1.0.0

                              If so, then please keep in mind that you cannot use them on your target (again: your target is ARM). You need libdns_sd.so in your sysroot. Is it there?

                              https://forum.qt.io/topic/113070/qt-code-of-conduct

                              1 Reply Last reply
                              0
                              • A Offline
                                A Offline
                                a_so
                                wrote on last edited by a_so
                                #16

                                I edited the .pro file as you suggested, but I get the warning

                                :-1: warning: skipping incompatible /home/staff/Qt5.8.0/5.8/android_armv7/lib/libqwt.so while searching for qwt

                                The warning appears, yet I do not see any associated errors with qwt. I guess, this warning is implemented somewhere in the project and appears. But of course I used the paths you suggested. I should not worry too much about this warning, right?

                                The directories are on my host machine on which I run my qt. What do you mean by sysroot?

                                jsulmJ 1 Reply Last reply
                                0
                                • A a_so

                                  I edited the .pro file as you suggested, but I get the warning

                                  :-1: warning: skipping incompatible /home/staff/Qt5.8.0/5.8/android_armv7/lib/libqwt.so while searching for qwt

                                  The warning appears, yet I do not see any associated errors with qwt. I guess, this warning is implemented somewhere in the project and appears. But of course I used the paths you suggested. I should not worry too much about this warning, right?

                                  The directories are on my host machine on which I run my qt. What do you mean by sysroot?

                                  jsulmJ Offline
                                  jsulmJ Offline
                                  jsulm
                                  Lifetime Qt Champion
                                  wrote on last edited by
                                  #17

                                  @a_so Do you build for Android when this warning occurs?

                                  Your sysroot seems to be --with-sysroot=/media/qt5-qwt6/android_sdk/Sdk/ndk-bundle/sysroot

                                  https://forum.qt.io/topic/113070/qt-code-of-conduct

                                  1 Reply Last reply
                                  0
                                  • A Offline
                                    A Offline
                                    a_so
                                    wrote on last edited by a_so
                                    #18

                                    Yes. I found the problem for this. I copied the library files in there once and as the content in this path is loaded when I try to build the project, this warning gets displayed. My errors now are all linked to libdns from avahi.

                                    /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
10:40:03: 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"
10:40:03: Elapsed time: 00:01.

                                    My sysroot for ndk is

                                    export NDK=/media/qt5-qwt6/ndk10/android-ndk-r10e
export SYSROOT=$NDK/platforms/android-21/arch-arm
                                    jsulmJ 1 Reply Last reply
                                    0
                                    • A a_so

                                      Yes. I found the problem for this. I copied the library files in there once and as the content in this path is loaded when I try to build the project, this warning gets displayed. My errors now are all linked to libdns from avahi.

                                      /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
10:40:03: 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"
10:40:03: Elapsed time: 00:01.

                                      My sysroot for ndk is

                                      export NDK=/media/qt5-qwt6/ndk10/android-ndk-r10e
export SYSROOT=$NDK/platforms/android-21/arch-arm
                                      jsulmJ Offline
                                      jsulmJ Offline
                                      jsulm
                                      Lifetime Qt Champion
                                      wrote on last edited by
                                      #19

                                      @a_so Where is libdns_sd.so ?

                                      https://forum.qt.io/topic/113070/qt-code-of-conduct

                                      1 Reply Last reply
                                      0
                                      • A Offline
                                        A Offline
                                        a_so
                                        wrote on last edited by a_so
                                        #20

                                        it is in:

                                        /usr/lib64

                                        But this is a x86_64 version for my linux host system. I want to build my shared library libdns_sd.so for arm architecture, but was not successful as a file is missing according to the link:

                                        http://gaiger-programming.blogspot.co.at/2015/12/utilize-avahi-libraries-in-android-for.html

                                        I have already contacted avahi but have not received a reply yet.

                                        jsulmJ 1 Reply Last reply
                                        0
                                        • A a_so

                                          it is in:

                                          /usr/lib64

                                          But this is a x86_64 version for my linux host system. I want to build my shared library libdns_sd.so for arm architecture, but was not successful as a file is missing according to the link:

                                          http://gaiger-programming.blogspot.co.at/2015/12/utilize-avahi-libraries-in-android-for.html

                                          I have already contacted avahi but have not received a reply yet.

                                          jsulmJ Offline
                                          jsulmJ Offline
                                          jsulm
                                          Lifetime Qt Champion
                                          wrote on last edited by
                                          #21

                                          @a_so Do you mean 0002-Add-uninstalled.pc.in-files.patch ?
                                          I just downloaded it clicking on it on that web site.

                                          https://forum.qt.io/topic/113070/qt-code-of-conduct

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