Before Ubuntu 20.04, I can install debug symbols for libc by installing the libc6-dbg package (which contains a long list of dynamic libraries compiled with debug symbols as shown in https://packages.ubuntu.com/focal/amd64/libc6-dbg/filelist). However, on later Ubuntu distributions, the libc6-dbg package contains only some *.debug files, as shown in the two links below.
I also search the debug symbol packages archive (http://ddebs.ubuntu.com) and found nothing.
It seems to be a known issue but without much activity. (https://bugs.launchpad.net/ubuntu/+source/glibc/+bug/1918035)
Is there still a package that gives dynamic libraries with debug symbols for libc on Ubuntu 22.04? Do I have other ways to get the debug symbols besides compiling the libc myself?
For anyone interested in this question, debug symbols have been correctly packed but switch to the new build-id system as the latest update on the BUG tracker says: https://bugs.launchpad.net/ubuntu/+source/glibc/+bug/1918035. So we need to find debug symbols using build-ids instead of filenames now.