Qt ftp on raspberry ...

  • Hi i'm trying to use QtFtp on my raspberry but with no success !

    At first, this is my config :

    • raspberry pi 2 raspbian jessie with Qt5.5.1 (i use this image : http://thebugfreeblog.blogspot.fr/, an incredible man that make a driver to use qtmultimedia in HW (gpu) !!! work very well , try it !)
    • my host pc is under kubuntu 15.10 64 bit, with qt 5.5.1
    • use cross compile to make my programs on the rasp

    Why i need QtFtp when Qt advise to use networkManager ? because with QnetworkAccessManager we can't list the tree of ftp server, create a folder ... like the QFtp class ...

    At first i have downloaded the source here : https://github.com/qtproject/qtftp
    To test it, i build it for my workstation, works fine !

    Now try to built it for the raspberry, for information my raspberry image (jessie with qt5.5.1) is mounted here on my workstation : */opt/rpi/sysroot/ and the compil *toolchain /opt/rpi/gcc-linaro-arm-linux-gnueabihf-raspbian/

    Now, i copy the source of qtftp on /opt/rpi/sysroot/usr/local/Qt-rasp2-5.5.1/qtftp-master/

    make a sync before the build :
    /opt/rpi/sysroot/usr/local/Qt-rasp2-5.5.1/bin/syncqt.pl -version 5.5.1

    qmake :
    /opt/rpi/sysroot/usr/local/Qt-rasp2-5.5.1/bin/qmake ./qtftp.pro

    and make :
    export PATH=/opt/rpi/gcc-linaro-arm-linux-gnueabihf-raspbian/bin:$PATH

    and i have this error during the compilation :

    /opt/rpi/gcc-linaro-arm-linux-gnueabihf-raspbian/bin/../lib/gcc/arm-linux-gnueabihf/4.8.3/../../../../arm-linux-gnueabihf/bin/ld.gold: error: cannot open /opt/rpi/sysroot/usr/lib/arm-linux-gnueabihf/libm.so

    Do you know how i can resolve this ?

  • Moderators

    @modjo756 said:

    error: cannot open /opt/rpi/sysroot/usr/lib/arm-linux-gnueabihf/libm.so

    Do you have a cross compiled version of "libm" in this location?
    That is apparently missing.

  • Hi, i don't know if it's a crosscompiled version of 'libm'. I use the image of raspbian jessie + qt5.5.1 of this Guy -> http://thebugfreeblog.blogspot.fr ?

    At first i cry that i have a problem with the image that i mount since my pc because this lib is present but have a symbolique link. To correct this i mount directly the raspberry sd card on opt/rpi/sysroot but i have the same problem. If a put this on a shell :
    modjo@Linux-corei5:/opt/rpi/sysroot/usr/lib/arm-linux-gnueabihf$ ls -l | grep libm.so
    lrwxrwxrwx 1 root root 34 sept. 6 03:59 libm.so -> /lib/arm-linux-gnueabihf/libm.so.6

    We can see the link ! but yet this error: cannot open /opt/rpi/sysroot/usr/lib/arm-linux-gnueabihf/libm.so

  • libm.so points to /lib/arm-linux-gnueabihf/libm.so.6. It may be wrong if your sysroot is in /opt/rpi/sysroot. I'd try to make it relative. QtFtp seems to build for me, but I didn't test it.

  • Perhaps it's the problem ! Thank's for your time lucas and your work !

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