I followed all of the instructions, and the test doesn't work (it doesn't put the new names)
I did it on ubuntu 20, with the libc.a that I locally have.
Seems fine here with Mint 20.3 and python3 (should be pretty much the same as Ubuntu 20).
A couple of lines needed a patch though:
unstrip_python3_patch.diff.gz
I followed all of the instructions, and the test doesn't work (it doesn't put the new names) I did it on ubuntu 20, with the libc.a that I locally have.