gui3-3.7.0 and 3.6.0 broken, missing sceneFromFirstRenderEngine

[mboisson]

Environment

• OS Version:
• Source or binary build?
  Source, gui3-3.7.0 (or 3.6.0, both are broken) with rendering3-3.4.0

Description

This is a compilation bug. Compiling gui3-3.7.0, with rendering3-3.4.0 yields :

25301 /tmp/mboisson/avx2/ignition/citadel/GCC-9.3.0/ign-gui-ignition-gui3_3.7.0/src/plugins/screenshot/Screenshot.cc:185:27: error: sceneFromFirstRenderEngine is not a member of ignition::rendering
25302   185 |   auto scene = rendering::sceneFromFirstRenderEngine();
25303       |                           ^~~~~~~~~~~~~~~~~~~~~~~~~~

[mboisson]

Ok, looks like I need rendering3-3.5.0, rather than `3.4.0.

[chapulina]

See #264 for bumping the required version in the code and gazebo-release/gz-gui3-release#5 for the debian packages. Ideally the installation / compilation should end early when a new dependency version is needed, instead of resulting in failures in the middle of the compilation.