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dslm4515 / CMLFS

Clang-Built Musl Linux From Scratch
MIT License
105 stars 18 forks source link

What are the packages that cannot be build without GCC? #86

Open mqrris opened 1 year ago

mqrris commented 1 year ago

I'm searching for a way to build a custom linux system without GNU, as I only need it for specific desktop usage and nothing else.

dslm4515 commented 1 year ago

I do not remember. This repo builds a final system without GCC. GCC is built at the end as an alternative compiler for packages (outside the scope of CMLFS) that require GCC and fail to compile with clang. At first GRUB won't compile without GCC but some else told me how to build it without clang.

The stage0 compiler is compiled by GCC. I haven't found a way to not use GCC to build the toolchain that will build the final system. Stage 0 and stage 1 compilers are used to build stage 2 compiler which becomes the compiler for the final system.

An example package that requires GCC and will not compile under clang is btop

UPDATE: btop++ now support clang ... since 1.3.x ?

emrakyz commented 1 year ago

There is a Musl-Clang only profile on Gentoo Linux. It doesn't have GCC. Clang 16.0.6 can built almost everything now (excluding glibc). I am not completely sure though if it can be reproduced easily with LFS and if Gentoo uses certain patches or methods.

@dslm4515 Can we use this repo with latest version of LFS now? I have Nvidia GPU and I am waiting for NVK drivers that will be available with Linux 6.6 kernel. Right now official nvidia drivers do not support Musl and nouveau is problematic.

For grub, efistub can be used for a bootloader replacement without needing any dependencies or programs on UEFI motherboards.

By the way, is Bash completely necessary for this build? Is it used in the process or is it just a preference for the interactive shell? Can we replace it with Dash for example?

Thanks for the great contribution though. It's a very popular topic but there is no repo similar to this.

dslm4515 commented 1 year ago

Can we use this repo with latest version of LFS now?

As a host? Yes, but will require some packages beyond LFS but found in BLFS. The current build method uses mussel to bootstrap the build.

For grub, efistub can be used for a bootloader replacement without needing any dependencies or programs on UEFI motherboards.

I included GRUB for motherboards with BIOS. For motherboards with UEFI, I just use rEFInd

Bash completely necessary for this build?

No. I have built it with Dash. I use bash as it's commonly installed and I use command-completion a lot.

As of this writing, CMLFS uses LLVM 15.0.6. I am currently testing the AMD64(aka x86_64) build to see if everything works, as I had issues before with packages in C++ not compiling. I really owe it to Chimera Linux as I could not update CMLFS past LLVM 11.0.0 without their patches to LLVM. So in a way, if Chimera Linux can build the latest version of LLVM, CMLFS will follow too.

build a custom linux system without GNU

In the future, I may maintain a separate branch for a pure non-GNU build of CMLFS ... its the bsd-userland branch. I think it still uses some GNU packages. Another distro dev is working with me on that branch.

emrakyz commented 1 year ago

How can Gentoo use the latest version of Clang, LLVM with their Musl-Clang-OpenRC only profiles and stage-3 tarballs? I have tried it and everything is bleeding edge with an update.

Do they use their own patches or patches from other distros?

Maybe you can check it out.