Reapply "systemd: enable debug info"

[alyssais]

Description of changes

This reverts commit 22b52d9.

Our bpftools package now contains the fix for 32-bit builds that caused this to be reverted before.

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandboxing enabled in nix.conf? (See Nix manual)
  • sandbox = relaxed
  • sandbox = true
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 24.11 Release Notes (or backporting 23.11 and 24.05 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
• Fits CONTRIBUTING.md.

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[alyssais]

@ofborg build pkgsi686Linux.systemd

[flokli]

I initially did a local cherry-pick to master, but bpftools doesn't seem to be fixed there yet:

[466/1864] Generating src/core/bpf/restrict_fs/restrict-fs.bpf.unstripped.o with a custom command
clang: warning: argument unused during compilation: '--gcc-toolchain=/nix/store/mn98jbwm09026dzh8vf8hn7hvm2iiqs4-gcc-13.2.0' [-Wunused-comma
nd-line-argument]
[467/1864] Generating src/core/bpf/restrict_fs/restrict-fs.bpf.o with a custom command
FAILED: src/core/bpf/restrict_fs/restrict-fs.bpf.o 
/nix/store/lvj61gdnla51sr84fjxvf2rnzya2400a-bpftools-6.7/bin/bpftool gen object src/core/bpf/restrict_fs/restrict-fs.bpf.o src/core/bpf/rest
rict_fs/restrict-fs.bpf.unstripped.o
Error: failed to link 'src/core/bpf/restrict_fs/restrict-fs.bpf.unstripped.o': Invalid argument (22)

A quick search on what to cherry-pick on the staging branch didn't find anything obvious (like a bpftools bump). Is there a commit you can point me at that I can cherry-pick to test this without rebuilding the world?

[alyssais]

It was #311995, but that's a world rebuild if you just cherry-pick it.

nixpkgs/pkgs/os-specific/linux/bpftools/default.nix

Line 12 in 3305b2b

inherit (linuxHeaders) version src;

[flokli]

Okay, the rebuild (on staging) is done here. Merging, thanks!