Adding library dependencies to Android Shared Library project

Igor Oliveira · wrote on 4 May 2016, 12:23

Hi!

I'm new to Qt Creator and I'm trying to create Android Native Library (C++, .so library).
My library requires EasyAR, so I need to specify the path for libEasyAR.so and the include path. How do I do this?

Thanks in advance.

Igor Oliveira

jsulm · wrote on 4 May 2016, 12:38

Check Qt documentation: http://doc.qt.io/qt-5/qmake-project-files.html#declaring-other-libraries

In your PRO file (I assume you're using qmake):
INCLUDEPATH += <your path>
LIBS += -L/usr/local/lib -lmath

Just change the paths and the lib name as needed.

Igor Oliveira · wrote on 4 May 2016, 13:10

Thanks for the help, jsulm. That solved the issue!

BrunoGeorgevich · 14 Jun 2016, 04:56

Hello guys, i've tried link some third-party shared libraries into my android application, but always i've encountered this three errors :

      :-1: warning: skipping incompatible /home/bruno/Documentos/Workspaces/Qt_Projects/brisa-project/platforms/qt/build-brisa/libbrisa.so while searching for brisa
      :-1: error: collect2: error: ld returned 1 exit status
      :-1: error: error: cannot find -lbrisa

i've already read a lot about this errors and i couldnt at least build the project.

i am using:
Qt 5.7 RC and QtCreator 4.0.1

BCU.pro

TEMPLATE = app

QT += qml quick widgets network xml
qtHaveModule(webengine) {
        QT += webengine
        DEFINES += QT_WEBVIEW_WEBENGINE_BACKEND
}

RESOURCES += View/qml.qrc \
    Assets/pics/pics.qrc
include(brisa.pri)

DISTFILES += Assets/TO_DO.txt \
    android/AndroidManifest.xml \
    android/gradle/wrapper/gradle-wrapper.jar \
    android/gradlew \
    android/res/values/libs.xml \
    android/build.gradle \
    android/gradle/wrapper/gradle-wrapper.properties \
    android/gradlew.bat

HEADERS += \
    Controller/controlpointbcu.h \
    Controller/dataobject.h \
    Controller/filedownloader.h \
    Controller/folderCompressor.h \
    Controller/essencials/qqmlhelpers.h \
    Controller/essencials/qqmlobjectlistmodel.h

SOURCES += Controller/main.cpp \
    Controller/controlpointbcu.cpp \
    Controller/dataobject.cpp \
    Controller/filedownloader.cpp \
    Controller/folderCompressor.cpp \
    Controller/essencials/qqmlhelpers.cpp \
    Controller/essencials/qqmlobjectlistmodel.cpp

contains(ANDROID_TARGET_ARCH,armeabi-v7a) {
    ANDROID_EXTRA_LIBS = \
        $$PWD/../../build-brisa/libbrisa.so
}

ANDROID_PACKAGE_SOURCE_DIR = $$PWD/android

brisa.pri

BASEDIR_BRUNO = /home/bruno/Documentos/Workspaces/Qt_Projects/brisa-project/platforms/qt
BASEDIR_MAC = /Users/compemac2/brisa-project/platforms/qt/build-brisa-iphonesimulator_clang_Qt_5_5_1_for_iOS-Debug/

INCLUDEPATH += $$BASEDIR_BRUNO/lib/include
LIBS += -L$$BASEDIR_BRUNO/build-brisa -lbrisa

Compile Output

23:10:40: Running steps for project BCU...
23:10:40: Configuration unchanged, skipping qmake step.
23:10:40: Starting: "/usr/bin/make" 
/home/bruno/Documentos/Qt/5.7/android_armv7/bin/qmake -spec android-g++ -o Makefile ../BCU/BCU.pro
/home/bruno/Documentos/Android/android-ndk-r11c/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-g++ --sysroot=/home/bruno/Documentos/Android/android-ndk-r11c/platforms/android-9/arch-arm/ -Wl,-soname,libBCU.so -Wl,-rpath=/home/bruno/Documentos/Qt/5.7/android_armv7/lib -Wl,--no-undefined -Wl,-z,noexecstack -shared -o libBCU.so main.o controlpointbcu.o dataobject.o filedownloader.o folderCompressor.o qqmlhelpers.o qqmlobjectlistmodel.o qrc_qml.o qrc_pics.o moc_controlpointbcu.o moc_dataobject.o moc_filedownloader.o moc_folderCompressor.o moc_qqmlhelpers.o moc_qqmlobjectlistmodel.o   -L/home/bruno/Documentos/Android/android-ndk-r11c/sources/cxx-stl/gnu-libstdc++/4.9/libs/armeabi-v7a -L/home/bruno/Documentos/Android/android-ndk-r11c/platforms/android-9/arch-arm//usr/lib -L/home/bruno/Documentos/Workspaces/Qt_Projects/brisa-project/platforms/qt/build-brisa -lbrisa -L/home/bruno/Documentos/Qt/5.7/android_armv7/lib -lQt5Quick -L/opt/android/ndk/sources/cxx-stl/gnu-libstdc++/4.9/libs/armeabi-v7a -L/opt/android/ndk/platforms/android-9/arch-arm//usr/lib -lQt5Widgets -lQt5Gui -lQt5Qml -lQt5Network -lQt5Xml -lQt5Core -lGLESv2 -lgnustl_shared -llog -lz -lm -ldl -lc -lgcc
/home/bruno/Documentos/Android/android-ndk-r11c/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/bruno/Documentos/Workspaces/Qt_Projects/brisa-project/platforms/qt/build-brisa/libbrisa.so while searching for brisa
Makefile:251: recipe for target 'libBCU.so' failed
/home/bruno/Documentos/Android/android-ndk-r11c/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 -lbrisa
main.o:main.cpp:function main: error: undefined reference to 'brisa::upnp::controlpoint::ControlPoint::start()'
main.o:main.cpp:function main: error: undefined reference to 'brisa::upnp::controlpoint::ControlPoint::discover()'
controlpointbcu.o:controlpointbcu.cpp:function ControlPointBCU::deviceRemoved(QString): error: undefined reference to 'brisa::upnp::controlpoint::ControlPoint::deviceGone(QString)'
controlpointbcu.o:controlpointbcu.cpp:function ControlPointBCU::ControlPointBCU(QQmlApplicationEngine*, QObject*, QString, int): error: undefined reference to 'brisa::upnp::controlpoint::ControlPoint::ControlPoint(QObject*, QString, int)'
controlpointbcu.o:controlpointbcu.cpp:function ControlPointBCU::ControlPointBCU(QQmlApplicationEngine*, QObject*, QString, int): error: undefined reference to 'brisa::upnp::controlpoint::ControlPoint::~ControlPoint()'
controlpointbcu.o:controlpointbcu.cpp:function ControlPointBCU::replyFinished(QNetworkReply*): error: undefined reference to 'brisa::upnp::controlpoint::Device::Device(QTemporaryFile*, QUrl*, QObject*)'
controlpointbcu.o:controlpointbcu.cpp:function ControlPointBCU::replyFinished(QNetworkReply*): error: undefined reference to 'brisa::upnp::controlpoint::Device::getAttribute(brisa::upnp::controlpoint::Device::xmlTags)'
controlpointbcu.o:controlpointbcu.cpp:function ControlPointBCU::replyFinished(QNetworkReply*): error: undefined reference to 'brisa::upnp::controlpoint::Device::getAttribute(brisa::upnp::controlpoint::Device::xmlTags)'
controlpointbcu.o:controlpointbcu.cpp:function ControlPointBCU::replyFinished(QNetworkReply*): error: undefined reference to 'brisa::upnp::controlpoint::Device::getServiceList()'
controlpointbcu.o:controlpointbcu.cpp:function ControlPointBCU::replyFinished(QNetworkReply*): error: undefined reference to 'brisa::upnp::AbstractService::getAction(QString const&)'
controlpointbcu.o:controlpointbcu.cpp:function ControlPointBCU::replyFinished(QNetworkReply*): error: undefined reference to 'brisa::upnp::controlpoint::Service::call(QString const&, QMap<QString, QString>&)'
controlpointbcu.o:controlpointbcu.cpp:function ControlPointBCU::replyFinished(QNetworkReply*): error: undefined reference to 'brisa::upnp::AbstractService::setAttribute(brisa::upnp::AbstractService::xmlTags, QString const&)'
controlpointbcu.o:controlpointbcu.cpp:function ControlPointBCU::replyFinished(QNetworkReply*): error: undefined reference to 'brisa::upnp::AbstractService::setAttribute(brisa::upnp::AbstractService::xmlTags, QString const&)'
controlpointbcu.o:controlpointbcu.cpp:function ControlPointBCU::decodeJsonList(): error: undefined reference to 'brisa::upnp::controlpoint::Device::getAttribute(brisa::upnp::controlpoint::Device::xmlTags)'
moc_controlpointbcu.o:moc_controlpointbcu.cpp:function ControlPointBCU::~ControlPointBCU(): error: undefined reference to 'brisa::upnp::controlpoint::ControlPoint::~ControlPoint()'
moc_controlpointbcu.o:moc_controlpointbcu.cpp:function QMetaTypeIdQObject<brisa::upnp::controlpoint::Device*, 8>::qt_metatype_id(): error: undefined reference to 'brisa::upnp::controlpoint::Device::staticMetaObject'
moc_controlpointbcu.o:moc_controlpointbcu.cpp:function ControlPointBCU::qt_metacast(char const*): error: undefined reference to 'brisa::upnp::controlpoint::ControlPoint::qt_metacast(char const*)'
moc_controlpointbcu.o:moc_controlpointbcu.cpp:function ControlPointBCU::qt_metacall(QMetaObject::Call, int, void**): error: undefined reference to 'brisa::upnp::controlpoint::ControlPoint::qt_metacall(QMetaObject::Call, int, void**)'
moc_controlpointbcu.o:moc_controlpointbcu.cpp:typeinfo for ControlPointBCU: error: undefined reference to 'typeinfo for brisa::upnp::controlpoint::ControlPoint'
moc_controlpointbcu.o:moc_controlpointbcu.cpp:ControlPointBCU::staticMetaObject: error: undefined reference to 'brisa::upnp::controlpoint::ControlPoint::staticMetaObject'
collect2: error: ld returned 1 exit status
make: *** [libBCU.so] Error 1
23:10:40: The process "/usr/bin/make" exited with code 2.
Error while building/deploying project BCU (kit: Android for armeabi-v7a (GCC 4.9, Qt 5.7.0))
When executing step "Make"
23:10:40: Elapsed time: 00:00.

Please, anyone can help me?
Sorry about the english =B

jsulm · 14 Jun 2016, 16:59

@BrunoGeorgevich For which architecture is that library built? Is it for ARMv7? Which compiler was used to build it?
You can check this with:

file /home/bruno/Documentos/Workspaces/Qt_Projects/brisa-project/platforms/qt/build-brisa/libbrisa.so

BrunoGeorgevich · 15 Jun 2016, 04:18

@jsulm the architecture is arm v7 and the compiler is GCC 5.2. That library really exists, but I didn't understand what you wanna say with "you can check this with". Again, I'm sorry about the English.

This shared library works when I built the project for desktop, using the GCC compiler, but with Android occurres this errors mentioned above.

jsulm · 22 Jun 2016, 01:48

@BrunoGeorgevich I mean: can you please execute this line on the command line and post its output here?

file /home/bruno/Documentos/Workspaces/Qt_Projects/brisa-project/platforms/qt/build-brisa/libbrisa.so

You cannot use the same library binary on desktop and Android/ARM! (unless your desktop is ARM as well)

BrunoGeorgevich · 22 Jun 2016, 04:15

@jsulm so, I've need to recompile my shared library to Arm v7? How can I turn this binares compatible with Arm V7?

jsulm · 22 Jun 2016, 13:22

@BrunoGeorgevich You have to build this library for ARMv7 or get a build for ARMv7 from somewhere. You cannot turn a x86 binary into ARMv7 binary.

BrunoGeorgevich · 23 Jun 2016, 04:13

@jsulm Do you know what i need do add to my qmake to compile this lib to ARM v7?

QT       += core network xml gui

CONFIG   += console
CONFIG   += qt warn_on
CONFIG   += hardening
CONFIG   -= app_bundle

TEMPLATE = lib

TARGET = brisa

INCLUDEPATH += "include"
INCLUDEPATH += "src"

#!exists( brisa.pri ) {
! brisa.pri {
    message("Creating the brisa.pri configuration file. Do not edit this file.")
    system(python scripts/gen_brisa_pri.py)
    QMAKE_CLEAN += brisa.pri
}

HEADERS += \
   //all .h

SOURCES += \
    //all .cpp

I never do something like this, to compile a lib to ARM v7. The code above is the .pro of the lib. What i need to add to this code, to compile it to ARM v7?

Pablo J. Rogina · wrote on 22 Jun 2016, 20:41

@Igor-Oliveira what about this document: Compiling QT-Brisa to Android and generate the Apk File?
I didn't try the whole process, but as a result of the build steps, I'd expect the libbrisa.so for Android built somewhere in your workspace...

jsulm · 28 Jun 2016, 05:32

@BrunoGeorgevich You don't have to change anything there. You have to use qmake and make from your ARMv7 build environment.

BrunoGeorgevich · J jsulm 23 Jun 2016, 04:13

@jsulm thanks bro. I, as you Said, just needed to built my lib to arm v7, before add it to my project. Thanks!

Adding library dependencies to Android Shared Library project

i am using: Qt 5.7 RC and QtCreator 4.0.1

i am using: Qt 5.7 RC and QtCreator 4.0.1

i am using:
Qt 5.7 RC and QtCreator 4.0.1

i am using:
Qt 5.7 RC and QtCreator 4.0.1