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我已经从 git 5.9.2 编译了最新版本的 qt，并使用最新的 raspibian (2017-08-16-raspbian-stretch.img) 作为 sysroot。

我以前安装了一些库来使用-opengl es2 进行编译。编译成功，但是当我运行应用程序时出现此错误：

此应用程序无法启动，因为它无法在“”中找到或加载 Qt 平台插件“eglfs”。
重新安装应用程序可能会解决此问题。
放弃

我有所有必要的库，没有任何未找到的依赖项：

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

我已经很好地安装了 libGLESv2 和 libEGL，并且 libeglfs 可以看到它们，就像用 ldd 解决的一样：

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)

我测试了使用 libqeglfs.so 的位置设置 QT_QPA_PLATFORM_PLUGIN_PATH 但同样的错误仍然存​​在：

此应用程序无法启动，因为它无法
在“/usr/local/qt5pi/plugins/platforms”中找到或加载 Qt 平台插件“eglfs”。
重新安装应用程序可能会解决此问题。
放弃

我需要你的帮助来解决这个严重的问题！谢谢。

关于配置的更新

配置命令：

./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

输出 ：

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.
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1 回答 1

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我至少发现了一个问题。

从这个开始：您的配置显示您正在使用标准设备linux-rasp-pi3-g++，但您的 ldd 显示您的应用程序链接到 GLES 的 Mesa 版本：

libGLESv2.so.2 => /usr/lib/arm-linux-gnueabihf/libGLESv2.so.2

据我了解，如果您使用linux-rasp-pi3-g++，则必须使用 Broadcom 提供的 GLES 和 EGL in /opt/vc/lib/.

解决方案：

  1. 卸载官方 Mesa: libgles2-mesa, libegl-mesa(内存中的包名)
  2. 将每个库符号链接/opt/vc/lib/到/usr/lib/arm-linux-gnueabihf/
  3. 添加缺少的符号链接：sudo ln -s libEGL.so libEGL.so.1和sudo ln -s libGLESv2.so libGLESv2.so.2

提示：export LD_LIBRARY_PATH=/opt/vc/lib/ your-executable在你摆脱 Mesa 之前尝试一下。

于 2018-11-18T20:38:10.903 回答