In principle you can patch your binary to accept the old local version, though I don't remember ever getting it to work right. Anyway here it is for the brave or foolhardy, here's the gist:

  patchelf --set-interpreter /lib/ld-linux-x86-64.so.2 "$APP"
  patchelf --set-rpath /lib "$APP"

> [...] brave or foolhardy, [...]

Heed the above warning as down this rpath madness surely lies!

Exhibit A: https://gitlab.com/RancidBacon/notes_public/-/blob/main/note...

Exhibit B: https://gitlab.com/RancidBacon/notes_public/-/blob/main/note...

Exhibit C: https://gitlab.com/RancidBacon/notes_public/-/blob/main/note...

Oh, sure, rpath/runpath shenanigans will work in some situations but then you'll be tempted to make such shenanigans work in all situations and then the madness will get you...

To save everyone a click here are the first two bullet points from Exhibit A:

* If an executable has `RPATH` (a.k.a. `DT_RPATH`) set but a shared library that is a (direct or indirect(?)) dependency of that executable has `RUNPATH` (a.k.a. `DT_RUNPATH`) set then the executable's `RPATH` is ignored!

* This means a shared library dependency can "force" loading of an incompatible [(for the executable)] dependency version in certain situations. [...]

Further nuances regarding LD_LIBRARY_PATH can be found in Exhibit B but I can feel the madness clawing at me again so will stop here. :)

Yes you can do this, thanks for mentioning I was interested and checked how you would go about it.

1. Delete the shared symbol versioning as per https://stackoverflow.com/a/73388939 (patchelf --clear-symbol-version exp mybinary)

2. Replace libc.so with a fake library that has the right version symbol with a version script e.g. version.map GLIBC_2.29 { global: *; };

With an empty fake_libc.c `gcc -shared -fPIC -Wl,--version-script=version.map,-soname,libc.so.6 -o libc.so.6 fake_libc.c`

3. Hope that you can still point the symbols back to the real libc (either by writing a giant pile of dlsym C code, or some other way, I'm unclear on this part)

Ideally glibc would stop checking the version if it's not actually marked as needed by any symbol, not sure why it doesn't (technically it's the same thing normally, so performance?).