Qt 6.7.2 can't find OpenGL::GL

therealmatiss

Hello! I'm trying to upgrade my Qt version from 6.2.2 to 6.7.2 - I have built everything, I need and compiled but when I try to run cmake .. on my project, I get this error. It's exactly the same code base as it worked on 6.2.2. I'm running on Nvidia Jetson TX2 on Jetpack 4.6.2 (Ubuntu 18.04) - and no, it's not possible to upgrade. I only need to run Qt in EGLFS mode and it was supported when I configured 6.7.2 compilation.

This is the CMake output:

CMake Error at /opt/Qt/6.7.2/lib/cmake/Qt6/FindWrapOpenGL.cmake:51 (target_link_libraries):
  The link interface of target "WrapOpenGL::WrapOpenGL" contains:

    OpenGL::GL

  but the target was not found.  Possible reasons include:

    * There is a typo in the target name.
    * A find_package call is missing for an IMPORTED target.
    * An ALIAS target is missing.

Call Stack (most recent call first):
  /usr/share/cmake-3.23/Modules/CMakeFindDependencyMacro.cmake:47 (find_package)
  /opt/Qt/6.7.2/lib/cmake/Qt6/QtPublicDependencyHelpers.cmake:36 (find_dependency)
  /opt/Qt/6.7.2/lib/cmake/Qt6Gui/Qt6GuiDependencies.cmake:33 (_qt_internal_find_third_party_dependencies)
  /opt/Qt/6.7.2/lib/cmake/Qt6Gui/Qt6GuiConfig.cmake:43 (include)
  /opt/Qt/6.7.2/lib/cmake/Qt6/Qt6Config.cmake:169 (find_package)
  CMakeLists.txt:107 (find_package)

What has changed since Qt 6.2 and Qt 6.7? This is the output of my Qt 6.7 configuration:

Qt Gui:
  Accessibility .......................... yes
  FreeType ............................... yes
    Using system FreeType ................ yes
  HarfBuzz ............................... yes
    Using system HarfBuzz ................ no
  Fontconfig ............................. yes
  Image formats:
    GIF .................................. yes
    ICO .................................. yes
    JPEG ................................. yes
      Using system libjpeg ............... yes
    PNG .................................. yes
      Using system libpng ................ yes
  Text formats:
    HtmlParser ........................... yes
    CssParser ............................ yes
    OdfWriter ............................ yes
    MarkdownReader ....................... yes
      Using system libmd4c ............... no
    MarkdownWriter ....................... yes
  EGL .................................... yes
  OpenVG ................................. no
  OpenGL:
    Desktop OpenGL ....................... yes
    OpenGL ES 2.0 ........................ no
    OpenGL ES 3.0 ........................ no
    OpenGL ES 3.1 ........................ no
    OpenGL ES 3.2 ........................ no
  Vulkan ................................. no
  Session Management ..................... yes

therealmatiss

I tried to create a minimal CMake project, which uses OpenGL - it does find it well.

This is the output:

"-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /usr/bin/cc - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
CMake Warning (dev) at /usr/share/cmake-3.23/Modules/FindOpenGL.cmake:315 (message):
  Policy CMP0072 is not set: FindOpenGL prefers GLVND by default when
  available.  Run "cmake --help-policy CMP0072" for policy details.  Use the
  cmake_policy command to set the policy and suppress this warning.

  FindOpenGL found both a legacy GL library:

    OPENGL_gl_LIBRARY: /usr/lib/aarch64-linux-gnu/libGL.so

  and GLVND libraries for OpenGL and GLX:

    OPENGL_opengl_LIBRARY: /usr/lib/aarch64-linux-gnu/libOpenGL.so
    OPENGL_glx_LIBRARY: /usr/lib/aarch64-linux-gnu/libGLX.so

  OpenGL_GL_PREFERENCE has not been set to "GLVND" or "LEGACY", so for
  compatibility with CMake 3.10 and below the legacy GL library will be used.
Call Stack (most recent call first):
  CMakeLists.txt:14 (find_package)
This warning is for project developers.  Use -Wno-dev to suppress it.

-- Found OpenGL: /usr/lib/aarch64-linux-gnu/libOpenGL.so   
-- Configuring done
-- Generating done"

I also tried adding set(OpenGL_GL_PREFERENCE GLVND) and set(OpenGL_GL_PREFERENCE LEGACY)