Hi Subbu, thank you again! After installing `libgl1-mesa-dev`, the build process ran successfully, however it was still missing that clang flag.
My questions are resolved so far, but I believe that further people could benefit from the exact documentation of the necessary dependencies:
first, the build failed because it was missing `clang`. Do I assume correctly that the following dependency should be mentioned anywhere in the repository?
sudo apt-get -y install clang
I haven't used clang. I use the gcc toolchain. Sorry
Which exact packages do I have to install? The `platforms/unix/config/configure` script requires `clang` to be installed as noted above. At the moment I have installed `gcc (Ubuntu 7.5.0-3ubuntu1~18.04) 7.5.0` and `clang version 6.0.0-1ubuntu2 (tags/RELEASE_600/final)`, but that clang version does not understand the `no-unused-but-set-variable` flag. Could you maybe refer to a specific package? :-)
I just read the `HowToBuild` file in the `build.linux*` directory. I installed the package string listed for Ubuntu, but the clang flag is still not recognized ...