Qt 5.9 error eglfs with raspberry pi 3

requinham

I have compiled the latest version of qt from git 5.9.2 with latest raspibian (2017-08-16-raspbian-stretch.img) as sysroot.

I have previously install some library to compile with -opengl es2. Compilation succeeded but when I run the application I have this error :

/This application failed to start because it could not find or load the Qt platform plugin "eglfs" in "".
Reinstalling the application may fix this problem.
Abandon

I have all necessary libs without any unfound dependencies :

pi@raspberrypi:~/testrpi $ ls -lisa /usr/local/qt5pi/plugins/platforms
total 548 
260886   4 drwxr-sr-x 2 root staff   4096 août  19 14:15 .
260882   4 drwxr-sr-x 8 root staff   4096 août  19 14:32 ..
260915   8 -rwxrwxr-x 1 root staff   6976 août  19 14:15 libqeglfs.so
260932 224 -rwxrwxr-x 1 root staff 228732 août  19 14:15 libqlinuxfb.so
260930  92 -rwxrwxr-x 1 root staff  90796 août  19 14:15 libqminimalegl.so
260888  24 -rwxrwxr-x 1 root staff  21472 août  19 14:15 libqminimal.so
260890  76 -rwxrwxr-x 1 root staff  74744 août  19 14:15 libqoffscreen.so
260934 116 -rwxrwxr-x 1 root staff 116604 août  19 14:15 libqvnc.so

I have well installed libGLESv2 and libEGL and libeglfs can see them like resolved with ldd :

pi@raspberrypi:~/testrpi $ ldd /usr/local/qt5pi/plugins/platforms/libqeglfs.so 
linux-vdso.so.1 (0x7ebd6000)
/usr/lib/arm-linux-gnueabihf/libarmmem.so (0x76f4f000)
libQt5EglFSDeviceIntegration.so.5 => /usr/local/qt5pi/lib/libQt5EglFSDeviceIntegration.so.5 (0x76eda000)
libQt5DBus.so.5 => /usr/local/qt5pi/lib/libQt5DBus.so.5 (0x76e6f000)
libfreetype.so.6 => /usr/lib/arm-linux-gnueabihf/libfreetype.so.6 (0x76dbf000)
libXext.so.6 => /usr/lib/arm-linux-gnueabihf/libXext.so.6 (0x76da0000)
libX11.so.6 => /usr/lib/arm-linux-gnueabihf/libX11.so.6 (0x76c7d000)
libEGL.so.1 => /usr/lib/arm-linux-gnueabihf/libEGL.so.1 (0x76c42000)
libQt5Gui.so.5 => /usr/local/qt5pi/lib/libQt5Gui.so.5 (0x768ab000)
libQt5Core.so.5 => /usr/local/qt5pi/lib/libQt5Core.so.5 (0x7643b000)
libdl.so.2 => /lib/arm-linux-gnueabihf/libdl.so.2 (0x76428000)
libGLESv2.so.2 => /usr/lib/arm-linux-gnueabihf/libGLESv2.so.2 (0x7640e000)
libpthread.so.0 => /lib/arm-linux-gnueabihf/libpthread.so.0 (0x763e5000)
libstdc++.so.6 => /usr/lib/arm-linux-gnueabihf/libstdc++.so.6 (0x7629d000)
libgcc_s.so.1 => /lib/arm-linux-gnueabihf/libgcc_s.so.1 (0x76270000)
libc.so.6 => /lib/arm-linux-gnueabihf/libc.so.6 (0x76131000)
libz.so.1 => /lib/arm-linux-gnueabihf/libz.so.1 (0x7610a000)
libpng16.so.16 => /usr/lib/arm-linux-gnueabihf/libpng16.so.16 (0x760d0000)
/lib/ld-linux-armhf.so.3 (0x76f76000)
libxcb.so.1 => /usr/lib/arm-linux-gnueabihf/libxcb.so.1 (0x760a1000)
libX11-xcb.so.1 => /usr/lib/arm-linux-gnueabihf/libX11-xcb.so.1 (0x7608f000)
libxcb-dri2.so.0 => /usr/lib/arm-linux-gnueabihf/libxcb-dri2.so.0 (0x7607b000)
libxcb-xfixes.so.0 => /usr/lib/arm-linux-gnueabihf/libxcb-xfixes.so.0 (0x76064000)
libxcb-dri3.so.0 => /usr/lib/arm-linux-gnueabihf/libxcb-dri3.so.0 (0x76051000)
libxcb-present.so.0 => /usr/lib/arm-linux-gnueabihf/libxcb-present.so.0 (0x7603e000)
libxcb-sync.so.1 => /usr/lib/arm-linux-gnueabihf/libxcb-sync.so.1 (0x76028000)
libxshmfence.so.1 => /usr/lib/arm-linux-gnueabihf/libxshmfence.so.1 (0x76016000)
libwayland-client.so.0 => /usr/lib/arm-linux-gnueabihf/libwayland-client.so.0 (0x75ffc000)
libwayland-server.so.0 => /usr/lib/arm-linux-gnueabihf/libwayland-server.so.0 (0x75fdf000)
libgbm.so.1 => /usr/lib/arm-linux-gnueabihf/libgbm.so.1 (0x75fc4000)
libexpat.so.1 => /lib/arm-linux-gnueabihf/libexpat.so.1 (0x75f92000)
libm.so.6 => /lib/arm-linux-gnueabihf/libm.so.6 (0x75f13000)
libdrm.so.2 => /usr/lib/arm-linux-gnueabihf/libdrm.so.2 (0x75ef6000)
libglapi.so.0 => /usr/lib/arm-linux-gnueabihf/libglapi.so.0 (0x75ebd000)
libXau.so.6 => /usr/lib/arm-linux-gnueabihf/libXau.so.6 (0x75eb2000)
libXdmcp.so.6 => /usr/lib/arm-linux-gnueabihf/libXdmcp.so.6 (0x75e9d000)
libffi.so.6 => /usr/lib/arm-linux-gnueabihf/libffi.so.6 (0x75e85000)
librt.so.1 => /lib/arm-linux-gnueabihf/librt.so.1 (0x75e6e000)
libbsd.so.0 => /lib/arm-linux-gnueabihf/libbsd.so.0 (0x75e45000)

I tested setting QT_QPA_PLATFORM_PLUGIN_PATH with the location of libqeglfs.so but the same error persist :

This application failed to start because it could not find or load the Qt platform plugin "eglfs"
in "/usr/local/qt5pi/plugins/platforms".
Reinstalling the application may fix this problem.
Abandon

configure command :

./configure -opengl es2 -device linux-rasp-pi3-g++ -device-option CROSS_COMPILE=~/opt/gcc-linaro-5.4.1-2017.05-i686_arm-linux-gnueabihf/bin/arm-linux-gnueabihf- -sysroot /mnt/rasp-pi-rootfs -opensource -confirm-license -reduce-exports -release -make libs -make tools -prefix /usr/local/qt5pi -hostprefix /usr/local/qt5pi -no-use-gold-linker

The output :

Configure summary:

Building on: linux-g++ (x86_64, CPU features: mmx sse sse2)
Building for: devices/linux-rasp-pi3-g++ (arm, CPU features: neon)
Configuration: cross_compile compile_examples enable_new_dtags largefile neon precompile_header shared rpath release c++11 c++14 c++1z concurrent dbus reduce_exports stl
Build options:
  Mode ................................... release
  Optimize release build for size ........ no
  Building shared libraries .............. yes
  Using C++ standard ..................... C++1z
  Using gold linker ...................... no
  Using new DTAGS ........................ yes
  Using precompiled headers .............. yes
  Using LTCG ............................. no
  Target compiler supports:
    NEON ................................. yes
  Build parts ............................ libs tools
Qt modules and options:
  Qt Concurrent .......................... yes
  Qt D-Bus ............................... yes
  Qt D-Bus directly linked to libdbus .... no
  Qt Gui ................................. yes
  Qt Network ............................. yes
  Qt Sql ................................. yes
  Qt Testlib ............................. yes
  Qt Widgets ............................. yes
  Qt Xml ................................. yes
Support enabled for:
  Using pkg-config ....................... yes
  QML debugging .......................... yes
  udev ................................... no
  Using system zlib ...................... yes
Qt Core:
  DoubleConversion ....................... yes
    Using system DoubleConversion ........ no
  GLib ................................... no
  iconv .................................. yes
  ICU .................................... no
  Logging backends:
    journald ............................. no
    syslog ............................... no
    slog2 ................................ no
  Using system PCRE2 ..................... no
Qt Network:
  getaddrinfo() .......................... yes
  getifaddrs() ........................... yes
  IPv6 ifname ............................ yes
  libproxy ............................... no
  OpenSSL ................................ no
    Qt directly linked to OpenSSL ........ no
  SCTP ................................... no
  Use system proxies ..................... yes
Qt Gui:
  Accessibility .......................... yes
  FreeType ............................... yes
    Using system FreeType ................ yes
  HarfBuzz ............................... yes
    Using system HarfBuzz ................ no
  Fontconfig ............................. no
  Image formats:
    GIF .................................. yes
    ICO .................................. yes
    JPEG ................................. yes
      Using system libjpeg ............... no
    PNG .................................. yes
      Using system libpng ................ yes
  EGL .................................... yes
  OpenVG ................................. no
  OpenGL:
    Desktop OpenGL ....................... no
    OpenGL ES 2.0 ........................ yes
    OpenGL ES 3.0 ........................ yes
    OpenGL ES 3.1 ........................ yes
  Session Management ..................... yes
Features used by QPA backends:
  evdev .................................. yes
  libinput ............................... no
  INTEGRITY HID .......................... no
  mtdev .................................. no
  tslib .................................. no
  xkbcommon-evdev ........................ no
QPA backends:
  DirectFB ............................... no
  EGLFS .................................. yes
  EGLFS details:
    EGLFS i.Mx6 .......................... no
    EGLFS i.Mx6 Wayland .................. no
    EGLFS EGLDevice ...................... yes
    EGLFS GBM ............................ no
    EGLFS Mali ........................... no
    EGLFS Raspberry Pi ................... no
    EGL on X11 ........................... yes
  LinuxFB ................................ yes
  VNC .................................... yes
  Mir client ............................. no
Qt Widgets:
  GTK+ ................................... no
  Styles ................................. Fusion Windows
Qt PrintSupport:
  CUPS ................................... no
Qt Sql:
  DB2 (IBM) .............................. no
  InterBase .............................. no
  MySql .................................. no
  OCI (Oracle) ........................... no
  ODBC ................................... no
  PostgreSQL ............................. no
  SQLite2 ................................ no
  SQLite ................................. yes
    Using system provided SQLite ......... no
  TDS (Sybase) ........................... no

Note: Also available for Linux: linux-clang linux-icc

Qt is now configured for building. Just run 'make'.
Once everything is built, you must run 'make install'.
Qt will be installed into '/mnt/rasp-pi-rootfs/usr/local/qt5pi'.

Prior to reconfiguration, make sure you remove any leftovers from
the previous build.

I need your help about this serious problem ! thanks.

jsulm

@requinham Try to start your app with QT_DEBUG_PLUGINS variable set to get a more verbose output.

requinham

@jsulm no change I have the same input. I also set QT_LOGGING_RULES="qt.qpa.*=true" but same output !

jsulm

@requinham Is it a debug build?

QT_DEBUG_PLUGINS=1 && ./my_app

requinham

@jsulm It is a release build like specified in configure command (-release)

jsulm

@requinham I mean: did you build your app in debug mode?

requinham

@jsulm No I compile it on release mode with the same parameter as I compile qt additional libraries (qtdeclarative, qtquickcontrols, etc.)

jsulm

@requinham Well, if you want to debug a problem you should build in debug mode.

moldovan.catalin

How did you managed to compile with Raspbian Stretch? I have Raspbian Stretch Lite and I don't manage to compile. It seems it doesn't find EGLFS support. I was trying to build native on the board (RPI3) with this config:

/../qt5/configure -release -opengl es2 -eglfs -no-gtk -tslib -force-pkg-config -opensource -confirm-license -make libs -device linux-rasp-pi3-g++ -optimized-qmake -reduce-exports -no-use-gold-linker -nomake examples -no-compile-examples -skip qtwebengine -qt-pcre -ssl -evdev -system-freetype -fontconfig -glib -prefix /opt/qt5pi -v

Taking a closer look at /opt/vc/lib folder on the board where the legacy VideoCore drivers are located I noticed that their names are changed. Instead of standard libEGL, libGLESv2 names I saw libbrcmEGL, libbrcmGLESv2 etc.

requinham

@moldovan.catalin For compiling I use raspbian stretch full version and I boot with it to install some libraries (libgles2, libgl-mesa-dri, libglew-dev, libpng, libjpeg, etc.) after this I remount my sdcard filesystem on my Ubuntu machine and I run the configure like mentioned in the first post.
I also compiled Qt 5.9.2 natively on Raspberry Pi 3 successfully and I succeeded running programs. I confirm that instead of eglfs there is brcm-eglfs and instead of libEGL and libGLESv2 there is libbrcm{EGL,GLESv2}.
I think it is a patched version for RPI.

requinham

@jsulm Thank you for your help but no more result ! I guess the problem is when compiling in host machine because my program can't see anything in the RPI...
I succeded to compile and run latest Qt natively in RPI3. Obviously, this take more time but make something works. It must important for the rest to found the problem with this may be in fixQualifiedLibraryPaths script !

jsulm

@moldovan.catalin You can create symbolic link in /opt/vc/lib pointing to these libraries but having old names.