is there an arch Fork where I can compile every package myself?
In order to be able to Further configure my system, I am looking for a fork of my current OS (artix with openRC as init system) in which i am able to compile every package from source in order to Further configure it with make flags. I am currently not using gentoo, and because the packages in its default repos are only updated when necessary, and the break-my-gentoo repo is more of a joke than an actual replacement for arch. However, if someone can recommand me a repo with similar package updates as arch, I would be looking at installing gentoo.
EDIT: Thank you for Pointing out to me that Gentoo can have newer Packages too. I did indeed not know this, and therefore just stamped off Gentoo as a stable rolling release distro. I will be looking at learning more about gentoo and eventually installing it, once I know how to use portage.
It sounds like Gentoo is literally exactly what you want.
I am currently not using gentoo, and because the packages in its default repos are only updated when necessary, and the break-my-gentoo repo is more of a joke than an actual replacement for arch.
I'm sorry, but I am genuinely confused here.
Gentoo can be both stable and bleeding edge and allows you to mix and match on a per-package basis.
Does setting ACCEPT_KEYWORDS="~amd64" globally not make things bleeding edge enough for you? Grab *-9999 packages instead.
Fellow Arch user here (btw). It's exactly the same as building AUR packages. Clone a git repo containing a PKGBUILD, use makepkg to build it, and pacman to install it. The nice thing is you can host a repo of your built packages and install them on other systems really easily. The big downside is that dependency management is not automated, so it will take some time and annoyance to map out what packages you need to build and in what order, if you want a fully source-bootstrapped system.
This is kinda the opposite of what you're asking for, but might address the reason that you're asking the question?
CachyOS is an Arch based distro, but it precompiles many arch packages (and some AUR packages) in several versions, optimised for either x86_64-v3 or x86_64-v4.
So if your goal is "optimised" rather than "compile yourself" it might be worth looking at
You could try Guix! It's ostensibly source based but you can use precompiled binaries as well (using the substitute system)
It's a source-first Functional package distro like Nix but uses Scheme to define everything from the packages to the way the init system (Shepherd) works.
It's very different from other distros but between being functional, source-first, and having shepherd, I personally love it
Most AUR packages that aren't postfixed with "-bin" are compiled on your system. Most distro packages have AUR counterparts, but they're usually git builds, so using them for every package you can will probably just break your system.
Also, the Arch repos are pretty much just an "AUR with binaries" - they contain the same PKGBUILD files used by AUR packages, because that's how Arch packages are built. So you can just download an Arch package PKGBUILD, modify it however you wish, and then build and install it.