Update build-from-source tutorial. Correct options, dependencies, and targets

[JonnyPtn]

Info in these sections was out of date.

Made a few other minor corrections and tidy up

[eXpl0it3r]

Thanks a lot for updating this! I've added a bunch of comments.

[eXpl0it3r]

We should mention the following three options:

• SFML_USE_MESA3D
• SFML_WARNINGS_AS_ERRORS
• SFML_FATAL_OPENGL_ERRORS <- Hmmm should this be part of the CONFIGURE_EXTRAS? 🤔

Wonder if the "developer" options should also be listed:

• SFML_CONFIGURE_EXTRAS
• SFML_ENABLE_COVERAGE
• SFML_ENABLE_PCH
• SFML_ENABLE_SANITIZERS
• SFML_ENABEL_STDLIB_ASSERTIONS

[JonnyPtn]

SFML_USE_MESA3D I would not document, as I understand it's simply an option enabled for CI builds on windows where the system opengl implementation may not work, and not really a feature end users should be using

SFML_WARNINGS_AS_ERRORS I think is pretty much obselete now cmake has an official option for it. We could still document the cmake option with a tl;dr of the official documentation if desired, as we do for some others here

The others I'm not entirely sure about - they are generally more advanced/developer options that people typically won't care about, and they are already somewhat documented by the cmake code itself with descriptions that also show in the cmake gui. There are also plenty more that aren't documented here that you haven't mentioned so it could be a bit of a rabbit hole.

Perhaps worth clarifying what the intention of this tutorial is, as "building from source" covers a very wide range of use-cases. Could just be and end user wanting to quickly build SFML so they can use it (which I get the impression was the original intention), could be a contributor wanting to debug and test some new feature, Could be a package manager maintainer wanting to produce a selection of builds, all of which have very different requirements

[eXpl0it3r]

I think it's fine to not mention the other options for now and maybe expand on other topics later on.

[eXpl0it3r]

Thank you for updating this! 🥳