ldconfig

Notes

• musl has its own search mechanism, which removes the need for an ldconfig
• ldconfig should be implemented as a stub (e.g. true)
• ldconfig can’t be symlinked to true because true is a symlink to toybox on glaucus

Current 4 implementations of ldconfig are:

• smaeul (most complete) (uses scanelf, requires PAX):
  • https://github.com/smaeul/musl-utils
  • https://git.adelielinux.org/adelie/packages/-/merge_requests/57/diffs?commit_id=c631e4fc5ab64a9ad668ed5f753348ce8eae5219
• alpine (uses scanelf, requires PAX): https://github.com/libertine-linux-packages/musl_ldconfig
• libertine (almost identical to alpine, with stylistic changes) (uses scanelf, requires PAX): https://github.com/libertine-linux-packages/musl_ldconfig
• gentoo (doesn’t use scanelf from PAX, but has BASHisms): https://gitweb.gentoo.org/repo/gentoo.git/tree/sys-libs/musl/files/
• Debian ld-musl-config is for appending paths to /etc/ld-musl-x86_64.path and not an ldconfig replacement
• Noname uses a shebang only #!/bin/sh inside ldconfig
• scanelf is part of pax-utils on Arch

Apparently smaeul’s ldconfig was added to Adelie because alpine’s ldconfig was limited and depended on scanelf, and smaeul’s ldconfig still doesn’t check for scanelf, but maybe they’ll check in the future… https://git.adelielinux.org/adelie/packages/-/merge_requests/57/commits

Packages that complain

(it’s basically libtool that complains when ldconfig is missing)

• gmp
• isl
• libffi
• mpc
• mpfr

Resources

• https://github.com/dslm4515/Musl-LFS/discussions/85
• https://wiki.gentoo.org/wiki/Hardened/PaX_Utilities