The Autopackage project had a solution for this problem years ago called apbuild. It would search for the versions of glibc symbols and use the oldest possible ones, which resulted in portable binaries. With some quick googling I found the code here: https://github.com/DeaDBeeF-Player/deadbeef-plugin-builder/t... Probably doesn't work anymore though :/

It's a bit sad that this is still unsolved, probably due to the GNU people's hatred for closed-source distribution.