View source for Talk:RaspberryPiWithQt5WebEngine

Unfortunately the step "Compiling Qt" does not work for me. 
All previous steps ran without problems.
The configuration of Qt gives me the following output at the end:

 Note: Also available for Linux: linux-clang linux-icc
 Note: PKG_CONFIG_LIBDIR automatically set to /home/matthias/workspaces/raspberrypi-raspbian/sysroot/usr/lib/pkgconfig:/home/matthias/workspaces/raspberrypi-raspbian/sysroot/usr/share   /pkgconfig:/home/matthias/workspaces/raspberrypi-raspbian/sysroot/usr/lib/arm-linux-gnueabihf/pkgconfig
 Note: PKG_CONFIG_SYSROOT_DIR automatically set to /home/matthias/workspaces/raspberrypi-raspbian/sysroot
 ERROR: Feature 'xcb' was enabled, but the pre-condition 'features.thread && features.xkbcommon && libs.xcb' failed.
 ERROR: Feature 'opengles2' was enabled, but the pre-condition '(config.win32 && !features.opengl-dynamic) || (!config.watchos && !features.opengl-desktop && libs.opengl_es2)' failed.
 ERROR: Feature 'eglfs' was enabled, but the pre-condition '!config.android && !config.darwin && !config.win32 && !config.wasm && features.egl' failed.
 ERROR: The OpenGL functionality tests failed!
 You might need to modify the include and library search paths by editing QMAKE_INCDIR_OPENGL[_ES2],
 QMAKE_LIBDIR_OPENGL[_ES2] and QMAKE_LIBS_OPENGL[_ES2] in the mkspec for your platform.

What can be the problem here?