Re: [Interest] Problem location symbol on android

Jason H Fri, 08 Apr 2016 06:43:44 -0700

I'm not sure of your exact issue, looks good to me. But do note:

1. You may need a QTPLUGIN

2. The android dynamic linker is single-pass, one-way. All prerequisites must me loaded prior to the library containing depenencies.

But, given your logs I think it should be working. I've not used the XMLdirectly, only so far as for SVG. in which case I have:

QT +=  svg xml

android|osx {


	QTPLUGIN += qsvg
}

HTH

Sent: Thursday, April 07, 2016 at 7:15 PM
From: "Lorne Sturtevant" <dra...@shaw.ca>
To: interest@qt-project.org
Subject: [Interest] Problem location symbol on android

I have a project that I'm trying to get working on android. I'm using Qt Creator to build and run everything. The program compiles, links and deploys. When it runs, I get the following error:

Starting remote process.V/Zygote (20264): Switching descriptor 33 to /dev/null

V/Zygote (20264): Switching descriptor 9 to /dev/null

D/dalvikvm(20264): Late-enabling CheckJNI

I/ActivityManager( 436): Start proc org.qtproject.example.test_mage for activity org.qtproject.example.test_mage/org.qtproject.qt5.android.bindings.QtActivity: pid=20264 uid=10109 gids={50109, 3003, 1028, 1015}

D/ActivityThread(20264): handleBindApplication:org.qtproject.example.test_mage

D/ActivityThread(20264): setTargetHeapUtilization:0.75

D/ActivityThread(20264): setTargetHeapMinFree:524288

D/dalvikvm(20264): Trying to load lib /data/data/org.qtproject.example.test_mage/lib/libgnustl_shared.so 0x2c665238

D/dalvikvm(20264): Added shared lib /data/data/org.qtproject.example.test_mage/lib/libgnustl_shared.so 0x2c665238

D/dalvikvm(20264): No JNI_OnLoad found in /data/data/org.qtproject.example.test_mage/lib/libgnustl_shared.so 0x2c665238, skipping init

D/dalvikvm(20264): Trying to load lib /data/data/org.qtproject.example.test_mage/lib/libQt5Core.so 0x2c665238

D/dalvikvm(20264): Added shared lib /data/data/org.qtproject.example.test_mage/lib/libQt5Core.so 0x2c665238

D/dalvikvm(20264): Trying to load lib /data/data/org.qtproject.example.test_mage/lib/libQt5Gui.so 0x2c665238

D/dalvikvm(20264): Added shared lib /data/data/org.qtproject.example.test_mage/lib/libQt5Gui.so 0x2c665238

D/dalvikvm(20264): No JNI_OnLoad found in /data/data/org.qtproject.example.test_mage/lib/libQt5Gui.so 0x2c665238, skipping init

D/dalvikvm(20264): Trying to load lib /data/data/org.qtproject.example.test_mage/lib/libQt5Widgets.so 0x2c665238

D/dalvikvm(20264): Added shared lib /data/data/org.qtproject.example.test_mage/lib/libQt5Widgets.so 0x2c665238

D/dalvikvm(20264): No JNI_OnLoad found in /data/data/org.qtproject.example.test_mage/lib/libQt5Widgets.so 0x2c665238, skipping init

D/dalvikvm(20264): Trying to load lib /data/data/org.qtproject.example.test_mage/lib/libQt5Xml.so 0x2c665238

D/dalvikvm(20264): Added shared lib /data/data/org.qtproject.example.test_mage/lib/libQt5Xml.so 0x2c665238

D/dalvikvm(20264): No JNI_OnLoad found in /data/data/org.qtproject.example.test_mage/lib/libQt5Xml.so 0x2c665238, skipping init

D/dalvikvm(20264): Trying to load lib /data/data/org.qtproject.example.test_mage/lib/libQt5Concurrent.so 0x2c665238

D/dalvikvm(20264): Added shared lib /data/data/org.qtproject.example.test_mage/lib/libQt5Concurrent.so 0x2c665238

D/dalvikvm(20264): No JNI_OnLoad found in /data/data/org.qtproject.example.test_mage/lib/libQt5Concurrent.so 0x2c665238, skipping init

D/dalvikvm(20264): Trying to load lib /data/data/org.qtproject.example.test_mage/lib/libQt5Network.so 0x2c665238

D/dalvikvm(20264): Added shared lib /data/data/org.qtproject.example.test_mage/lib/libQt5Network.so 0x2c665238

D/dalvikvm(20264): No JNI_OnLoad found in /data/data/org.qtproject.example.test_mage/lib/libQt5Network.so 0x2c665238, skipping init

D/dalvikvm(20264): Trying to load lib /data/data/org.qtproject.example.test_mage/qt-reserved-files/plugins/platforms/android/libqtforandroid.so 0x2c665238

D/dalvikvm(20264): Added shared lib /data/data/org.qtproject.example.test_mage/qt-reserved-files/plugins/platforms/android/libqtforandroid.so 0x2c665238

I/Qt (20264): qt start

D/dalvikvm(20264): Trying to load lib /data/data/org.qtproject.example.test_mage/qt-reserved-files/plugins/bearer/libqandroidbearer.so 0x2c665238

D/dalvikvm(20264): Added shared lib /data/data/org.qtproject.example.test_mage/qt-reserved-files/plugins/bearer/libqandroidbearer.so 0x2c665238

D/dalvikvm(20264): No JNI_OnLoad found in /data/data/org.qtproject.example.test_mage/qt-reserved-files/plugins/bearer/libqandroidbearer.so 0x2c665238, skipping init

D/dalvikvm(20264): Trying to load lib /data/app-lib/org.qtproject.example.test_mage-2/libphysfs.so 0x2c665238

D/dalvikvm(20264): Added shared lib /data/app-lib/org.qtproject.example.test_mage-2/libphysfs.so 0x2c665238

D/dalvikvm(20264): No JNI_OnLoad found in /data/app-lib/org.qtproject.example.test_mage-2/libphysfs.so 0x2c665238, skipping init

D/dalvikvm(20264): Trying to load lib /data/app-lib/org.qtproject.example.test_mage-2/libmage.so 0x2c665238

E/dalvikvm(20264): dlopen("/data/app-lib/org.qtproject.example.test_mage-2/libmage.so") failed: dlopen failed: cannot locate symbol "_ZN18QXmlDefaultHandlerC2Ev" referenced by "libmage.so"...

The constructor for QXmlDefaultHandler is not found. It looks like it's loading the libQt5Xml.so library fine though. When I examine the library in the build directory, this is what I get:
$ objdump -T libQt5Xml.so | grep _ZN18QXmlDefaultHandlerC2Ev
000121b9 g DF .text 00000038 _ZN18QXmlDefaultHandlerC2Ev

The symbol is in the library, but I have no idea why it's not finding it.

Any help with this would be greatly appreciated.

-- 
Lorne Sturtevant
Sum Ergo Cogito

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Re: [Interest] Problem location symbol on android

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