Open GL error on raspbian Buster with Pi4 when starting application

Markus Ippy

Good day

i compiled QT on raspbian Buster on my Pi4 with the linux-rasp-pi3-g++ option . I did the EGLFS fix as outlined in https://wiki.qt.io/RaspberryPi2EGLFS by editing the qmake.conf with

VC_LIBRARY_PATH = $$[QT_SYSROOT]/opt/vc/lib
VC_INCLUDE_PATH = $$[QT_SYSROOT]/opt/vc/include
VC_LINK_LINE = -L$${VC_LIBRARY_PATH}
QMAKE_LIBDIR_OPENGL_ES2 = $${VC_LIBRARY_PATH}

Then i used this configuration

 PKG_CONFIG_LIBDIR=/usr/lib/arm-linux-gnueabihf/pkgconfig PKG_CONFIG_SYSROOT_DIR=/ \../qt-everywhere-src-5.12.4/configure -v -opengl es2 -eglfs -no-xcb -no-pch -no-gtk -device linux-rasp-pi3-g++ \-device-option CROSS_COMPILE=/usr/bin/ -opensource -confirm-license -reduce-exports \-force-pkg-config -nomake examples -no-compile-examples -skip qtwayland -skip qtwebengine -release \-qt-pcre -ssl -evdev -system-freetype -fontconfig -glib -gstreamer -prefix /opt/QT5

My program compiles but i get these errors

QOpenGLShaderProgram::uniformLocation(matrix): shader program is not linked
QOpenGLShaderProgram::uniformLocation(opacity): shader program is not linked
QOpenGLShaderProgram::uniformLocation(pixelSize): shader program is not linked
Buffer creation failed
Buffer creation failed
QOpenGLShaderProgram: could not create shader program
QOpenGLShader: could not create shader
QOpenGLShader: could not create shader
shader compilation failed:

This was the output of my configuration

Configure summary:

Building on: linux-g++ (arm, CPU features: <none>)
Building for: devices/linux-rasp-pi3-g++ (arm, CPU features: neon)
Target compiler: gcc 8.3.0
Configuration: cross_compile use_gold_linker enable_new_dtags largefile neon 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 ....................... C11
  Using C++ standard ..................... C++1z
  Using ccache ........................... no
  Using gold linker ...................... yes
  Using new DTAGS ........................ yes
  Using precompiled headers .............. no
  Using LTCG ............................. no
  Target compiler supports:
	NEON ................................. yes
  Build parts ............................ libs
Qt modules and options:
  Qt Concurrent .......................... yes
  Qt D-Bus ............................... yes
  Qt D-Bus directly linked to libdbus .... yes
  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
  udev ................................... yes
  Using system zlib ...................... yes
Qt Core:
  DoubleConversion ....................... yes
	Using system DoubleConversion ........ yes
  GLib ................................... yes
  iconv .................................. no
  ICU .................................... yes
  Tracing backend ........................ <none>
  Logging backends:
	journald ............................. no
	syslog ............................... no
	slog2 ................................ no
  Using system PCRE2 ..................... no
Qt Network:
  getifaddrs() ........................... yes
  IPv6 ifname ............................ yes
  libproxy ............................... no
  Linux AF_NETLINK ....................... yes
  OpenSSL ................................ yes
	Qt directly linked to OpenSSL ........ no
  OpenSSL 1.1 ............................ yes
  DTLS ................................... yes
  SCTP ................................... no
  Use system proxies ..................... yes
Qt Gui:
  Accessibility .......................... yes
  FreeType ............................... yes
	Using system FreeType ................ yes
  HarfBuzz ............................... yes
	Using system HarfBuzz ................ yes
  Fontconfig ............................. yes
  Image formats:
	GIF .................................. yes
	ICO .................................. yes
	JPEG ................................. yes
	  Using system libjpeg ............... yes
	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
	OpenGL ES 3.2 ........................ yes
  Vulkan ................................. yes
  Session Management ..................... yes
Features used by QPA backends:
  evdev .................................. yes
  libinput ............................... yes
  INTEGRITY HID .......................... no
  mtdev .................................. yes
  tslib .................................. no
  xkbcommon .............................. yes
  X11 specific:
	XLib ................................. yes
	XCB Xlib ............................. yes
	EGL on X11 ........................... no
QPA backends:
  DirectFB ............................... no
  EGLFS .................................. yes
  EGLFS details:
	EGLFS OpenWFD ........................ no
	EGLFS i.Mx6 .......................... no
	EGLFS i.Mx6 Wayland .................. no
	EGLFS RCAR ........................... no
	EGLFS EGLDevice ...................... no
	EGLFS GBM ............................ yes
	EGLFS VSP2 ........................... no
	EGLFS Mali ........................... no
	EGLFS Raspberry Pi ................... yes
	EGLFS X11 ............................ no
  LinuxFB ................................ yes
  VNC .................................... yes
  Mir client ............................. no
Qt Sql:
  SQL item models ........................ yes
Qt Widgets:
  GTK+ ................................... no
  Styles ................................. Fusion Windows
Qt PrintSupport:
  CUPS ................................... yes
Qt Sql Drivers:
  DB2 (IBM) .............................. no
  InterBase .............................. no
  MySql .................................. no
  OCI (Oracle) ........................... no
  ODBC ................................... yes
  PostgreSQL ............................. yes
  SQLite2 ................................ yes
  SQLite ................................. yes
	Using system provided SQLite ......... no
  TDS (Sybase) ........................... yes
Qt Testlib:
  Tester for item models ................. yes
Qt SerialBus:
  Socket CAN ............................. yes
  Socket CAN FD .......................... yes
Further Image Formats:
  JasPer ................................. no
  MNG .................................... yes
  TIFF ................................... yes
	Using system libtiff ................. yes
  WEBP ................................... yes
	Using system libwebp ................. no
Qt QML:
  QML network support .................... yes
  QML debugging and profiling support .... yes
  QML sequence object .................... yes
  QML list model ......................... yes
  QML XML http request ................... yes
  QML Locale ............................. yes
  QML delegate model ..................... yes
Qt Quick:
  Direct3D 12 ............................ no
  AnimatedImage item ..................... yes
  Canvas item ............................ yes
  Support for Qt Quick Designer .......... yes
  Flipable item .......................... yes
  GridView item .......................... yes
  ListView item .......................... yes
  TableView item ......................... yes
  Path support ........................... yes
  PathView item .......................... yes
  Positioner items ....................... yes
  Repeater item .......................... yes
  ShaderEffect item ...................... yes
  Sprite item ............................ yes
Qt Scxml:
  ECMAScript data model for QtScxml ...... yes
Qt Gamepad:
  SDL2 ................................... no
Qt 3D:
  Assimp ................................. yes
  System Assimp .......................... no
  Output Qt3D Job traces ................. no
  Output Qt3D GL traces .................. no
  Use SSE2 instructions .................. no
  Use AVX2 instructions .................. no
  Aspects:
	Render aspect ........................ yes
	Input aspect ......................... yes
	Logic aspect ......................... yes
	Animation aspect ..................... yes
	Extras aspect ........................ yes
Qt 3D Renderers:
  OpenGL Renderer ........................ yes
Qt 3D GeometryLoaders:
  Autodesk FBX ........................... no
Qt Bluetooth:
  BlueZ .................................. yes
  BlueZ Low Energy ....................... yes
  Linux Crypto API ....................... yes
  WinRT Bluetooth API (desktop & UWP) .... no
Qt Sensors:
  sensorfw ............................... no
Qt Quick Controls 2:
  Styles ................................. Default Fusion Imagine Material Universal
Qt Quick Templates 2:
  Hover support .......................... yes
  Multi-touch support .................... yes
Qt Positioning:
  Gypsy GPS Daemon ....................... no
  WinRT Geolocation API .................. no
Qt Location:
  Qt.labs.location experimental QML plugin . yes
  Geoservice plugins:
	OpenStreetMap ........................ yes
	HERE ................................. yes
	Esri ................................. yes
	Mapbox ............................... yes
	MapboxGL ............................. yes
	Itemsoverlay ......................... yes
QtXmlPatterns:
  XML schema support ..................... yes
Qt Multimedia:
  ALSA ................................... yes
  GStreamer 1.0 .......................... yes
  GStreamer 0.10 ......................... no
  Video for Linux ........................ yes
  OpenAL ................................. no
  PulseAudio ............................. yes
  Resource Policy (libresourceqt5) ....... no
  Windows Audio Services ................. no
  DirectShow ............................. no
  Windows Media Foundation ............... no
Qt Tools:
  QDoc ................................... no

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

WARNING: QDoc will not be compiled, probably because libclang could not be located. This means that you cannot build the Qt documentation.

Either ensure that llvm-config is in your PATH environment variable, or set LLVM_INSTALL_DIR to the location of your llvm installation.
On Linux systems, you may be able to install libclang by installing the libclang-dev or libclang-devel package, depending on your distribution.
On macOS, you can use Homebrew's llvm package.
On Windows, you must set LLVM_INSTALL_DIR to the installation path.

Qt is now configured for building. Just run 'make'.
Once everything is built, you must run 'make install'.
Qt will be installed into '/opt/QT5'.

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

Can anyone assist what might be the issue ?

closx

@Markus-Ippy said in Open GL error on raspbian Buster with Pi4 when starting application:

QOpenGLShaderProgram::uniformLocation(matrix): shader program is not linked

I guess it is some issue about OpenGL. Not your Qt configuration or application. Try the solution on here.

Kelsie

Hello Markus,

I'm not sure if what I offer is a solution to what you problem or just yet another long winded ramble, but for another angle besides what you have tried so far, you could try
adding "-no-feature-opengles3" to your configure statement.

It is my understanding that the RPi when using the GPU firmware support OpenGLES v2 .
Since your using the device option "linux-rasp-pi3-g++" that means you want to use the binary bcm BLOB(firmware) that controls the GPU, which is the default for that qt device option, but not the default for the pi4's firmware. But that's another issue.

I have compiled both the raspi-pi3-g++ and the pi3-vc4 one and they both work with my projects when using the option:

"-no-feature-opengles3"

#I have binaries here built on buster raspbian at sf:
https://sourceforge.net/projects/qt-5-9-8-eglfs-emb-rpipi2-plus/
and
https://sourceforge.net/projects/qt-5-9-8-eglfs-gbm-emb-pi3-vc4/

If you check qtdiag after a good build you can see what your opengles setup is.

Here is the important info from my rpi3 "GPU blob enabled" build, the same type of one your building.

LibGLES Vendor: Broadcom
Renderer: VideoCore IV HW
Version: OpenGL ES 2.0
Shading language: OpenGL ES GLSL ES 1.00
Format: Version: 2.0 Profile: 0 Swap behavior: 0 Buffer size (RGB): 5,6,5

and then

Here is the important info from my rpi3 " mesa VC4 enabled" build, obv NOT same type of one your building in your example here, but given anyway for comparison. Even though I do add this option (-no-feature-opengles3) with the vc4 build too it does not break my builds so far (YMMV). The rpi3-vc4 qt "-device" version supports a higher version of es2 from mesa, but I think the hardware is still limited to 2.0
That being said the "Shader language statement below still says it can do 3.0 in my -no-feature-opengles3 configured vc4 build :) Symantics.

LibGLES Vendor: Broadcom
Renderer: V3D 4.2
Version: OpenGL ES 3.0 Mesa 19.1.0-devel
Shading language: OpenGL ES GLSL ES 3.00
Format: Version: 3.0 Profile: 0 Swap behavior: 0 Buffer size (RGB): 8,8,8

Just in the unlikely case you havent seen it. A long discussion about about the vc4 , see next link.
Some of that, I think says , how it's default setup DOES NOT use the GPU
binary when on the Pi4. Not a quote but thats what I got from it.
https://www.raspberrypi.org/forums/viewtopic.php?f=67&t=243564&p=1508457&hilit=vc4#p1508457
or
https://www.raspberrypi.org/forums/viewtopic.php?t=216804
and
https://www.raspberrypi.org/forums/viewtopic.php?t=244519
and
https://www.raspberrypi.org/forums/viewtopic.php?f=67&t=243507&p=1508172&hilit=vc4#p1508172

Good luck.

*note my examples are with 5.9.8, but still applies as I have built up to 12.4 same way, but I dont use the latest with mine because I have unresolved mysql/mariadb issues in >5.9.8 , but thats just me.