Can't compile module rtl8192eu because `GLIBC_2.33' not found

[cyberdroid]

make.log

[cyberdroid]

Ubuntu 20.04

[clnhub]

I assume you are using a mainline kernel?

Mainline kernels are now built on the newest Ubuntu version with glibc v2.33 and thus kernel modules require the same version. From what I know 'glibc' is part of the distribution and is hard to update.

This is the bug report about this.

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1926938

You can wait for an official fix, or:

1. Try to upgrade glibc to v2.33
2. Upgrade to v21.04
3. Use the official Ubuntu kernel

[CGarces]

This should work to compile the kernel but maybe broke something, use at your own risk.

wget -nv http://mirrors.kernel.org/ubuntu/pool/main/g/glibc/libc6_2.33-0ubuntu5_amd64.deb
sudo dpkg --force-all -i libc6_2.33-0ubuntu5_amd64.deb

Works fine on my CI builds https://github.com/Mange/rtl8192eu-linux-driver/commit/4013a01fe6e0a6e34853f9d2885d3cb02f5f230e

[cyberdroid]

Thanks for the responses. Ok, now the problem is clear. I think the best solution will be installing ubuntu 21.04 in a VM and compile rtl8192eu module there then copy that module to 20.04 kernel tree.

[jameshilliard]

scripts/basic/fixdep: /lib/x86_64-linux-gnu/libc.so.6: version `GLIBC_2.33' not found (required by scripts/basic/fixdep)

This indicates the userspace utility scripts/basic/fixdep was linked against a newer glibc, something probably messed up in your build env.

Mainline kernels are now built on the newest Ubuntu version with glibc v2.33 and thus kernel modules require the same version. From what I know 'glibc' is part of the distribution and is hard to update.

This doesn't make sense, libc(ie glibc) is a usespace thing, kernel modules don't use a libc at all.

[clnhub]

Yep, modpost and fixdep. This is only valid for Ubuntu's pre-compiled kernels. Compiling from source always works.