title: Errors with raspberry pi 3 - Qt 5.9 eglfs
body: <p>I have compiled the latest version of qt from git 5.9.2 with latest raspibian (2017-08-16-raspbian-stretch.img) as sysroot.</p>
  <p>I have previously installed some library to compile with <code>-opengl es2</code>. Compilation succeeded but when I run the application I got this error :</p>
  <blockquote>
  <p>This application failed to start because it could not find or load the Qt platform plugin &quot;eglfs&quot;
  in &quot;&quot;.<br>
  Reinstalling the application may fix this problem.<br>
  Abandon</p>
  </blockquote>
  <p>I have all necessary libs without any unfound dependencies :</p>
  <pre><code>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
  </code></pre>
  <p>I have well installed libGLESv2 and libEGL and libeglfs can see them like resolved with ldd :</p>
  <pre><code>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 =&gt; /usr/local/qt5pi/lib/libQt5EglFSDeviceIntegration.so.5 (0x76eda000)
  libQt5DBus.so.5 =&gt; /usr/local/qt5pi/lib/libQt5DBus.so.5 (0x76e6f000)
  libfreetype.so.6 =&gt; /usr/lib/arm-linux-gnueabihf/libfreetype.so.6 (0x76dbf000)
  libXext.so.6 =&gt; /usr/lib/arm-linux-gnueabihf/libXext.so.6 (0x76da0000)
  libX11.so.6 =&gt; /usr/lib/arm-linux-gnueabihf/libX11.so.6 (0x76c7d000)
  libEGL.so.1 =&gt; /usr/lib/arm-linux-gnueabihf/libEGL.so.1 (0x76c42000)
  libQt5Gui.so.5 =&gt; /usr/local/qt5pi/lib/libQt5Gui.so.5 (0x768ab000)
  libQt5Core.so.5 =&gt; /usr/local/qt5pi/lib/libQt5Core.so.5 (0x7643b000)
  libdl.so.2 =&gt; /lib/arm-linux-gnueabihf/libdl.so.2 (0x76428000)
  libGLESv2.so.2 =&gt; /usr/lib/arm-linux-gnueabihf/libGLESv2.so.2 (0x7640e000)
  libpthread.so.0 =&gt; /lib/arm-linux-gnueabihf/libpthread.so.0 (0x763e5000)
  libstdc++.so.6 =&gt; /usr/lib/arm-linux-gnueabihf/libstdc++.so.6 (0x7629d000)
  libgcc_s.so.1 =&gt; /lib/arm-linux-gnueabihf/libgcc_s.so.1 (0x76270000)
  libc.so.6 =&gt; /lib/arm-linux-gnueabihf/libc.so.6 (0x76131000)
  libz.so.1 =&gt; /lib/arm-linux-gnueabihf/libz.so.1 (0x7610a000)
  libpng16.so.16 =&gt; /usr/lib/arm-linux-gnueabihf/libpng16.so.16 (0x760d0000)
  /lib/ld-linux-armhf.so.3 (0x76f76000)
  libxcb.so.1 =&gt; /usr/lib/arm-linux-gnueabihf/libxcb.so.1 (0x760a1000)
  libX11-xcb.so.1 =&gt; /usr/lib/arm-linux-gnueabihf/libX11-xcb.so.1 (0x7608f000)
  libxcb-dri2.so.0 =&gt; /usr/lib/arm-linux-gnueabihf/libxcb-dri2.so.0 (0x7607b000)
  libxcb-xfixes.so.0 =&gt; /usr/lib/arm-linux-gnueabihf/libxcb-xfixes.so.0 (0x76064000)
  libxcb-dri3.so.0 =&gt; /usr/lib/arm-linux-gnueabihf/libxcb-dri3.so.0 (0x76051000)
  libxcb-present.so.0 =&gt; /usr/lib/arm-linux-gnueabihf/libxcb-present.so.0 (0x7603e000)
  libxcb-sync.so.1 =&gt; /usr/lib/arm-linux-gnueabihf/libxcb-sync.so.1 (0x76028000)
  libxshmfence.so.1 =&gt; /usr/lib/arm-linux-gnueabihf/libxshmfence.so.1 (0x76016000)
  libwayland-client.so.0 =&gt; /usr/lib/arm-linux-gnueabihf/libwayland-client.so.0 (0x75ffc000)
  libwayland-server.so.0 =&gt; /usr/lib/arm-linux-gnueabihf/libwayland-server.so.0 (0x75fdf000)
  libgbm.so.1 =&gt; /usr/lib/arm-linux-gnueabihf/libgbm.so.1 (0x75fc4000)
  libexpat.so.1 =&gt; /lib/arm-linux-gnueabihf/libexpat.so.1 (0x75f92000)
  libm.so.6 =&gt; /lib/arm-linux-gnueabihf/libm.so.6 (0x75f13000)
  libdrm.so.2 =&gt; /usr/lib/arm-linux-gnueabihf/libdrm.so.2 (0x75ef6000)
  libglapi.so.0 =&gt; /usr/lib/arm-linux-gnueabihf/libglapi.so.0 (0x75ebd000)
  libXau.so.6 =&gt; /usr/lib/arm-linux-gnueabihf/libXau.so.6 (0x75eb2000)
  libXdmcp.so.6 =&gt; /usr/lib/arm-linux-gnueabihf/libXdmcp.so.6 (0x75e9d000)
  libffi.so.6 =&gt; /usr/lib/arm-linux-gnueabihf/libffi.so.6 (0x75e85000)
  librt.so.1 =&gt; /lib/arm-linux-gnueabihf/librt.so.1 (0x75e6e000)
  libbsd.so.0 =&gt; /lib/arm-linux-gnueabihf/libbsd.so.0 (0x75e45000)
  </code></pre>
  <p>I tested setting QT_QPA_PLATFORM_PLUGIN_PATH with the location of libqeglfs.so but the same error persist :</p>
  <blockquote>
  <p>This application failed to start because it could not find or load the Qt platform plugin &quot;eglfs&quot;<br>
  in &quot;/usr/local/qt5pi/plugins/platforms&quot;.<br>
  Reinstalling the application may fix this problem.<br>
  Abandon</p>
  </blockquote>
  <p>I need your help about this serious problem !
  thanks.</p>
  <h2>UPDATE ABOUT CONFIGURE</h2>
  <p>configure command :</p>
  <pre><code>./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
  </code></pre>
  <p>The output :</p>
  <pre><code>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.
  </code></pre>