Yeah that's what I meant. I also came across some script with redefinitions of C standard library functions that supposedly also allows you to link against older glibc symbols. I couldn't make it work.
Any half-decent SDK should allow you to trivially target an older platform version, but apparently doing trivial-seeming things without suffering is not The Linux Way™.
The reason that there is no SDK is because containers (and before that sysroots) are good enough that no one bothers to maintain the 100% usability solution.
Any half-decent SDK should allow you to trivially target an older platform version, but apparently doing trivial-seeming things without suffering is not The Linux Way™.