Qt 4.8.0 / embedded / issue compiling example (examples/network/download/main.cpp)

gregm

Hi,

I'm cross-compiling qt 4.8.0 on ubuntu 10.04 host with a freescale imx53 as target.
Compiling 4.7.2 works fine.
After downloading qt-everywhere-opensource-src-4.8.0.tar.gz and configuring it with the following command line:
@./configure -arch arm -xplatform linux-g++-mx5x -release -prefix /tftpboot/ltib/usr/local/Trolltech/Qt-4.8.0-mx5x-x11 -multimedia -phonon -phonon-backend -qt-gfx-linuxfb -qt-kbd-tty -little-endian -host-little-endian -fontconfig -sm -opengl es2 -static -qt-libjpeg@

I get the following error:
@/opt/freescale/usr/local/gcc-4.4.4-glibc-2.11.1-multilib-1.0/arm-fsl-linux-gnueabi/bin/arm-none-linux-gnueabi-g++ -c -pipe -O2 -fsigned-char -march=armv7-a -mfpu=neon -mfloat-abi=softfp -Wall -W -D_REENTRANT -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE -DQT_NO_DEBUG -DQT_NETWORK_LIB -DQT_CORE_LIB -I../../../mkspecs/linux-g++-mx5x -I. -I../../../include/QtCore -I../../../include/QtNetwork -I../../../include -I. -I.moc/release-static -I/home/naratte/imx/mx53/11.09/ltib/rootfs/usr/include -I/home/naratte/imx/mx53/11.09/ltib/rootfs/usr/include/glib-2.0 -I/tftpboot/ltib/usr/lib/glib-2.0/include -I/tftpboot/ltib/usr/include/gstreamer-0.10 -I/tftpboot/ltib/usr/include/libxml2 -I/home/naratte/imx/mx53/11.09/ltib/rootfs/usr/include/freetype2 -I/home/naratte/imx/mx53/11.09/ltib/rootfs/usr/include/mysql -o .obj/release-static/main.o main.cpp
/opt/freescale/usr/local/gcc-4.4.4-glibc-2.11.1-multilib-1.0/arm-fsl-linux-gnueabi/bin/arm-none-linux-gnueabi-g++ -Wl,-rpath-link,/home/naratte/qt/4.8.0/qt-everywhere-opensource-src-4.8.0/lib -Wl,-O1 -Wl,-rpath,/tftpboot/ltib/usr/local/Trolltech/Qt-4.8.0-mx5x-x11/lib -Wl,-rpath,/tftpboot/ltib/usr/local/Trolltech/Qt-4.8.0-mx5x-x11/lib -o download .obj/release-static/main.o -L/home/naratte/qt/4.8.0/qt-everywhere-opensource-src-4.8.0/lib -L/tftpboot/ltib/usr/lib -lQtNetwork -L/home/naratte/qt/4.8.0/qt-everywhere-opensource-src-4.8.0/lib -L/tftpboot/ltib/usr/lib -lQtCore -lglib-2.0 -lgthread-2.0 -lgstreamer-0.10 -lxml2 -lgmodule-2.0 -lgobject-2.0 -lts -lasound -lxcb -lXau -lxcb-xlib -lXext -lXrender -lX11 -lfreetype -lexpat -ljpeg -lfontconfig -lSM -lICE -lpng -lgsl -lgsl-fsl -lEGL -lGLESv2 -lz -lm -ldl -lrt -lpthread
.obj/release-static/main.o: In function main': main.cpp:(.text+0xd4c): undefined reference to QCoreApplication::QCoreApplication(int&, char**, int)'
collect2: ld returned 1 exit status@

Looking at src/corelib/kernel/qcoreapplication.h it shows the constructors for QCoreApplication are defined as:
@
#if defined(QT_BUILD_CORE_LIB) || defined(qdoc)
QCoreApplication(int &argc, char **argv); // ### Qt5 remove
#endif
#if !defined(qdoc)
QCoreApplication(int &argc, char **argv, int
#if !defined(QT_BUILD_CORE_LIB)
= ApplicationFlags
#endif
);
#endif
@

Looks like the library QtCore is compiled with the constructor QCoreApplication(int &argc, char **argv);, whereas the example is compiled using the other constructor.

What's a clean way to fix this issue?

Thanks!
Greg

gregm

ok problem solved: in the configure command line, I removed -static which was left from previous tentatives, which was conflicting with qmake.conf which was defining dynamic lib.

So not an issue now.

Thanks,
Greg

post4pavan

Hi Gregm, Have you ported Qt to your target?

gregm

yes, i did. make sure to use the qmake.conf which is posted on the imxcommunity in referece to Qt on Freescale cpu

post4pavan

Yeah Yes! I have used the same qmake.conf you have referred to from the community.

Can you please tell me

if you have used an application binary? or
if you have used a QML based model to port to your Target?

Thanks & Regards :: Krishna Pavan

gregm

An app binary

post4pavan

Thank You Gregm!

Can you please tell me the way you have ported it to the target, I mean Application Binary for the instant.
I would like to know, If you know / have any information QML port to target.

Can you please tell me?

Thanks & Regards :: Krishna Pavan