How to run QT application on X-window of the embedded platform

uniquez

You need to specify X11 include files and libraries, arm libs!

================================

I have specified X11 include files and libraries(for arm)' path by modifing linux.conf in /mkspecs/common, but the error remain. Is it right?

It is too later tonight, I will compile QT-lib following what you said tomorrow.
Anyway, thank you help me again and again.

uniquez

By the way, the X11 include files and libraries are provided in filesytems by TI ezsdk.

Serg

bq. I have specified X11 include files and libraries(for arm)’ path by modifing linux.conf in /mkspecs/common, but the error remain. Is it right?

I'm think it's right.

This error can be when libXext is missed.
Here is "Qt for X11 requirements":http://qt-project.org/doc/qt-4.8/requirements-x11.html. Ensure that you have all required libs.

uniquez

One more question, when I configure my QT-lib compiling using "./configure -xplatform linux-arm-gnueabi-g++",
it outputs "You have not explicitly asked to use pkg-config and are cross-compiling.
pkg-config will not be used to automatically query cflag/lib parameters for
dependencies"
But when I use "./configure", there is no that message.

Although it is not en error, I think something is not configured right.

Serg

Try it: ./configure -arch arm -xplatform linux-arm-gnueabi-g++ -force-pkg-config

uniquez

After I modified "QMAKE_LIBS_X11 = -lXext -lX11 -lm -lxcb -lpthread-stubs -lXau -lXdmcp " in /mkspecs/common/linux.conf,
now I can configure successfully by using "./configure -arch arm -xplatform linux-arm-gnueabi-g++ -force-pkg-config".

However, after I "make", there are some errors:

arm-none-linux-gnueabi-g++ -Wl,-rpath-link,/home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib -Wl,-O1 -Wl,-rpath,/usr/local/Trolltech/Qt-4.8.1/lib -Wl,-rpath,/usr/local/Trolltech/Qt-4.8.1/lib -o rsslisting .obj/release-shared/main.o .obj/release-shared/rsslisting.o .obj/release-shared/moc_rsslisting.o -L/home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib -lQtXml -L/home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib -lQtGui -L/opt/ezsdk_5_03_01_15/linux-devkit/arm-none-linux-gnueabi/usr/lib -lQtNetwork -lQtCore -lpthread
/opt/CodeSourcery/Sourcery_G++_Lite/bin/../lib/gcc/arm-none-linux-gnueabi/4.3.3/../../../../arm-none-linux-gnueabi/bin/ld: warning: libXrender.so.1, needed by /home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so, not found (try using -rpath or -rpath-link)
/opt/CodeSourcery/Sourcery_G++_Lite/bin/../lib/gcc/arm-none-linux-gnueabi/4.3.3/../../../../arm-none-linux-gnueabi/bin/ld: warning: libXext.so.6, needed by /home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so, not found (try using -rpath or -rpath-link)
/opt/CodeSourcery/Sourcery_G++_Lite/bin/../lib/gcc/arm-none-linux-gnueabi/4.3.3/../../../../arm-none-linux-gnueabi/bin/ld: warning: libX11.so.6, needed by /home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so, not found (try using -rpath or -rpath-link)
/opt/CodeSourcery/Sourcery_G++_Lite/bin/../lib/gcc/arm-none-linux-gnueabi/4.3.3/../../../../arm-none-linux-gnueabi/bin/ld: warning: libxcb.so.1, needed by /home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so, not found (try using -rpath or -rpath-link)
/opt/CodeSourcery/Sourcery_G++_Lite/bin/../lib/gcc/arm-none-linux-gnueabi/4.3.3/../../../../arm-none-linux-gnueabi/bin/ld: warning: libpthread-stubs.so.0, needed by /home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so, not found (try using -rpath or -rpath-link)
/opt/CodeSourcery/Sourcery_G++_Lite/bin/../lib/gcc/arm-none-linux-gnueabi/4.3.3/../../../../arm-none-linux-gnueabi/bin/ld: warning: libXau.so.6, needed by /home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so, not found (try using -rpath or -rpath-link)
/opt/CodeSourcery/Sourcery_G++_Lite/bin/../lib/gcc/arm-none-linux-gnueabi/4.3.3/../../../../arm-none-linux-gnueabi/bin/ld: warning: libXdmcp.so.6, needed by /home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so, not found (try using -rpath or -rpath-link)
/home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XSetTile' /home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XReparentWindow'
/home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XSetIMValues' /home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XConvertSelection'
/home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XSetFillStyle' /home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XUnsetICFocus'
/home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to `XQueryColors'

uniquez

/home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XTranslateCoordinates' /home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XDeleteProperty'
/home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XSetWMColormapWindows' /home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XVisualIDFromVisual'
/home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XSetICFocus' /home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XMaxRequestSize'
/home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XGetErrorDatabaseText' /home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XUngrabButton'
/home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XOpenIM' /home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XGetInputFocus'
/home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XCheckTypedEvent' /home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XDefineCursor'
/home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XSetFunction' /home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XKillClient'
/home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XRenderCreatePicture' /home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XVaCreateNestedList'
/home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XGetFontPath' /home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XShapeCombineRegion'
/home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XSetClipRectangles' /home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XGetWindowAttributes'
/home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XRemoveFromSaveSet' /home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XGrabButton'
/home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XGetKeyboardMapping' /home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XFreePixmap'
/home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XLoadQueryFont' /home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XFillPolygon'
/home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XUnionRectWithRegion' /home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XSyncDestroyCounter'
/home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XmbTextPropertyToTextList' /home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XRenderCreateCursor'
/home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XGetSelectionOwner' /home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XCloseDisplay'
/home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XSync' /home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XGetAtomName'
/home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XCheckIfEvent' /home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XPutImage'
/home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XDrawString16' /home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XListPixmapFormats'
collect2: ld returned 1 exit status
make[3]: *** [rsslisting] Error 1
make[3]: Leaving directory /home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/examples/xml/rsslisting' make[2]: *** [sub-rsslisting-make_default] Error 2 make[2]: Leaving directory /home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/examples/xml'
make[1]: *** [sub-xml-make_default] Error 2
make[1]: Leaving directory `/home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/examples'
make: *** [sub-examples-make_default-ordered] Error 2

Can you tell me how to eliminate these error?

uniquez

When I make again by configuring " ./configure -arch arm -xplatform arm-none-linux-gnueabi-g++ -release -force-pkg-config"
There is an other error:

arm-none-linux-gnueabi-g++ -Wl,-rpath-link,/home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib -Wl,-O1 -Wl,-rpath,/home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/src/3rdparty/webkit/Source/lib -Wl,-rpath,/usr/local/Trolltech/Qt-4.8.1/lib -Wl,-rpath,/usr/local/Trolltech/Qt-4.8.1/lib -o tst_qdeclarativewebview .obj/release-shared/tst_qdeclarativewebview.o .obj/release-shared/qrc_tst_qdeclarativewebview.o -L/home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib -L/opt/ezsdk_5_03_01_15/linux-devkit/arm-none-linux-gnueabi/usr/lib -L/home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib -lQtDeclarative -lQtScript -lQtSvg -L/opt/ezsdk_5_03_01_15/linux-devkit/arm-none-linux-gnueabi/usr/lib -lQtSql -lQtXmlPatterns -lQtWebKit -lQtTest -lQtGui -lQtNetwork -lQtCore -lpthread -lXrender -lXext -lX11 -lm -lxcb -lpthread-stubs -lXau -lXdmcp
/home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtCore.so: undefined reference to QInotifyFileSystemWatcherEngine::create()' /home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtCore.so: undefined reference to clock_gettime'
/home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtCore.so: undefined reference to QDnotifyFileSystemWatcherEngine::create()' collect2: ld returned 1 exit status make[3]: *** [tst_qdeclarativewebview] Error 1 make[3]: Leaving directory /home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/src/3rdparty/webkit/Source/WebKit/qt/tests/qdeclarativewebview'
make[2]: *** [sub-qdeclarativewebview-make_default] Error 2

there are many more "undefined reference to" variables, why?

Serg

Are you sure that path to arm X11 libraries is correct (in linux.conf QMAKE_LIBDIR_X11 and QMAKE_INCDIR_X11) and X11 version is X11R6? If it's true, then i can suppose that arm-none-linux-gnueabi-g++ and linux-arm-gnueabi-g++ have a different binary format and ld can't link it. If i'm right, you should use one compiler for X11 libs and Qt. It means that you should use linux-arm-gnueabi-g++ rather than arm-none-linux-gnueabi-g++, because it's compiler from Ubuntu repository and you are compiling for Ubuntu.

But I didn't have any problems like this. So, I don't know what exactly you should do in this case :(

uniquez

“sudo apt-get install g++-arm-linux-gnueabi” and try to use mkspec from qt.gitorius. Then ./configure -arch arm -xplatform linux-arm-gnueabi-g++.

===============================================
Today I followed the second method to apt-get install g++-arm-linux-gnueabi and make my QT-lib,and those errors still exist.

/home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XDefineCursor' /home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XSetFunction'
/home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XKillClient' /home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XRenderCreatePicture'
/home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XVaCreateNestedList' /home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XGetFontPath'
/home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XShapeCombineRegion' /home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XSetClipRectangles'
/home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to SmcOpenConnection' /home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XGetWindowAttributes'
/home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XRemoveFromSaveSet' /home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XGrabButton'
/home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XGetKeyboardMapping' /home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XFreePixmap'
/home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XLoadQueryFont' /home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XFillPolygon'
/home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to SmcSaveYourselfDone' /home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XUnionRectWithRegion'
/home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XSyncDestroyCounter' /home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XmbTextPropertyToTextList'
/home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XRenderCreateCursor' /home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XGetSelectionOwner'
/home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XCloseDisplay' /home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XSync'
/home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XGetAtomName' /home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XCheckIfEvent'
/home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XPutImage' /home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XDrawString16'
/home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/lib/libQtGui.so: undefined reference to XListPixmapFormats' collect2: ld returned 1 exit status make[3]: *** [saxbookmarks] Error 1 make[3]: Leaving directory /home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/examples/xml/saxbookmarks'
make[2]: *** [sub-saxbookmarks-make_default] Error 2
make[2]: Leaving directory /home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/examples/xml' make[1]: *** [sub-xml-make_default] Error 2 make[1]: Leaving directory /home/xushaofan/qt_4.8.1_pkg/qt-everywhere-opensource-src-4.8.1/examples'
make: *** [sub-examples-make_default-ordered] Error 2

==============================
And I am sure my arm X11 libraries is correct. Because in /qt-everywhere-opensource-src-4.8.1/config.tests/x11/xlib, I use "arm-linux-gnueabi-g++ -o xlib xlib.cpp -I/opt/ezsdk/linux-devkit/arm-none-linux-gnueabi/usr/include -L/opt/ezsdk/linux-devkit/arm-none-linux-gnueabi/usr/lib -lXext -lX11 -lm -lxcb -lpthread-stubs -lXau -lXdmcp"
and "arm-none-linux-gnueabi-g++ -o xlib xlib.cpp -I/opt/ezsdk/linux-devkit/arm-none-linux-gnueabi/usr/include -L/opt/ezsdk/linux-devkit/arm-none-linux-gnueabi/usr/lib -lXext -lX11 -lm -lxcb -lpthread-stubs -lXau -lXdmcp"
to compile xlib. Both successfully.

Bye the way, the X11 libraries' directory is under the /arm-none-linux-gnueabi/usr/lib in filesystem, so I think the X11 libraries is compiled by arm-none-linux-gnueabi. However, Whether I use "arm-none-linux-gnueabi-g++" or "linux-arm-gnueabi-g++" to make my QT-lib, those “ undefined reference to” error still exist.

uniquez

[quote author="Serg" date="1337702523"]Are you sure that path to arm X11 libraries is correct (in linux.conf QMAKE_LIBDIR_X11 and QMAKE_INCDIR_X11) and X11 version is X11R6? If it's true, then i can suppose that arm-none-linux-gnueabi-g++ and linux-arm-gnueabi-g++ have a different binary format and ld can't link it. If i'm right, you should use one compiler for X11 libs and Qt. It means that you should use linux-arm-gnueabi-g++ rather than arm-none-linux-gnueabi-g++, because it's compiler from Ubuntu repository and you are compiling for Ubuntu.

But I didn't have any problems like this. So, I don't know what exactly you should do in this case :([/quote]

Sorry for reply later. Last Thursday, I had copiled QT-LIB for Ubuntu based DM8148 successfully.

Above these errors, I made two mistakes about X11-LIB.

I wrote my own mkspec for arm-none-linux-gnueabi-g++ compiler, and I named it "arm-none-linux-gnueabi-g++" not "linux-", so when I make, there is an error: /lib/libQtCore.so: undefined reference to `QDnotifyFileSystemWatcherEngine::create()’
Because When creating the mkspec for a embedded target if the name of the directory does not match "linux-*" then the following build error will be seen.

The resolution is :
edit ./src/corelib/io/io.pri
find linux-*:
append your cross-toolchain's prefix after it

eg:
my toolchains's prefix is arm_xxxxx
so....
68 linux-|arm:{
69 SOURCES +=
70 io/qfilesystemwatcher_inotify.cpp
71 io/qfilesystemwatcher_dnotify.cpp
72
73 HEADERS +=
74 io/qfilesystemwatcher_inotify_p.h
75 io/qfilesystemwatcher_dnotify_p.h
76 }

==================================================================

/lib/libQtCore.so: undefined reference to `clock_gettime’:
append "-lrt" parameters after the "./configure" so that the compiler can find the define in librt.

==================================================================

“/lib/libQtGui.so: undefined reference to” about X11-lib
I modified QMAKE_LIBDIR_X11, QMAKE_INCDIR_X11 and QMAKE_LIBS_X11 in /mkspec/common/linux.conf to specify X11 include files and libraries, arm libs. However the Makefile, which qmake generated, did not include X11-LIB in the “LIBS”. So when I compile the demos or examples of QT, there are many of "undefined reference to" errors about X11-LIB, then I append "-lXmu -lXft -lXt -lXcursor -lXrandr -lXrender -lXv -lXdamage -lXcomposite -lxcb-damage -lxcb-composite -lxcb-randr -lxcb-xv -lxcb-xvmc -lxcb-xprint -lxcb-xtest -lxcb-xfixes -lxcb-xinerama -lxcb-xevie -lxcb-xf86dri -lxcb-shape -lxcb-shm -lxcb-sync -lxcb-render -lxcb-res -lxcb-screensaver -lxcb-dpms -lxcb-dri2 -lxcb-record -lxcb-glx -lXfixes -lXext -lX11-xcb -lX11 -lxcb -lXau -lXdmcp -lfontconfig -lfreetype -lpthread-stubs -lexpat -lm -lz -lstdc++ -lglib-2.0 -lSM -lICE -luuid " after "LIBS =" in demos and examples' Makefiles which qmake generated, and it can compile successfully.

But I have not find why my qmake not generate above of X11-LIB in Makefile. I am sure that "linux.conf" is modified correctly.

==============================================

Anyway, I have transplanted QT-LIB to Ubuntu successfully, and I must thank you so much for your warm-heart and help me again and aigan!!! If there were no your guidance, I wound not complete it.

Serg

So, now cross-compiler works fine? And your test-program is running correctly on arm system?

uniquez

My test-program works fine, besides two small questions:

My .gif files dont display, while I am sure I have compiled libqgif.so in plugins/mageformats, and have put it in qt-lib directory of filesystem.
My test-program can generate ico which I selected in Windows platform, but can not generate in Ubuntu platform。 libqico.so has been also in plugins/mageformats.

dreamerindia

i tried to compile the QT with following command by following
“http://forums.digi.com/support/forum/viewthread_thread,6858#20693”

./configure -confirm-license -embedded arm -xplatform qws/linux-arm-g++ -prefix /usr/local/QtEmbedded-4.4.3 -hostprefix /usr/local/DigiEL-5.6/x-tools/arm-cortex_a8-linux-gnueabi -qt-sql-sqlite -depths 15,16 -qt-kbd-usb -qt-mouse-tslib

and i got this error

Basic XLib functionality test failed!
 You might need to modify the include and library search paths by editing
QMAKE_INCDIR_X11 and QMAKE_LIBDIR_X11 in /home/qmax/Desktop/QT_Latest/qt-x11-opensource-src-4.5.3/mkspecs/qws/linux-arm-g++.

I tried the following
Try 1:

sudo apt-get build-dep qt4-qmake (installed)

Ref:http://www.qtforum.org/article/27401/debian-xlib-test-failed-after-configure.html

Try 2:

sudo apt-get build-dep  libxext-dev

Ref:http://www.qtforum.org/article/27886/installing-qt4-problem-basic-xlib-functionality-test-failed.html

Try 3:

sudo apt-get install libx11-dev libxau-dev libxaw7-dev libxcb1-dev libxcomposite-dev libxcursor-dev libxdamage-dev libxdmcp-dev
sudo apt-get install libxext-dev libxfixes-dev libxfont-dev libxft-dev libxi-dev libxinerama-dev libxkbfile-dev libxmu-dev libxmuu-dev
sudo apt-get install libxpm-dev libxrandr-dev libxrender-dev libxres-dev libxss-dev libxt-dev libxtst-dev libxv-dev libxvmc-dev
sudo apt-get install libglib2.0-dev
sudo apt-get install libssl-dev
sudo apt-get install libgtk2.0-dev
sudo apt-get install libcups2-dev
sudo apt-get install libgl1-mesa-dev libglu1-mesa-dev
sudo apt-get install libgstreamer0.10-dev

Ref:http://qt-project.org/wiki/Compile_Qt_4.7_on_Ubuntu_10.10

Try 4:

sudo apt-get install ^libxcb.* libx11-xcb-dev libglu1-mesa-dev libxrender-dev -y

Ref:http://qt-project.org/forums/viewthread/15858

But nothing works…still same error…..

did anyone got the solution

Anonymous_1

Hello Everyone , I am also facing a similar problem.
I have a BeagleBone Black (Rev A 5c) running Angstrom linux.
I have ubuntu 13.04 PC as host. I am trying to run a Qt UI application on Beaglebone which is connected to HDMI screen on which by default it shows Desktop Screen.
First of All , I set up Qt -(4.8.5 )build environment for ARM on my ubuntu (Host).
Then I transfered The Qt library to Beaglebone.
I am able to cross compile applications for Beaglebone on Qtcreator .
I tranfered the executable file to BeagleBone ,The console/terminal applications are running fine but when i Start the GUI application ,No window frame launches up inside the desktop as if app. do not start . I can just see desktop.I followed this tutorial to set up Qt-4.8.5(http://www.cloud-rocket.com/2013/07/building-qt-for-beaglebone).
Someone PLease help.Your help will be appreciated.