ldd reports `GLIBC_2.34' not found but emacspeak was built against glibc-2.33

[DidierSpaier]

Context: Slint Linux version 15.0, glibc 2.33, emacs_30.1, emacspeak-60.0 built including "make espeak" and "make outloud".

Running:
ldd /usr/share/emacs/site-lisp/emacspeak/servers/linux-outloud/alsaparams

gives:
/usr/share/emacs/site-lisp/emacspeak/servers/linux-outloud/alsaparams: /lib64/libc.so.6: version `GLIBC_2.34' not found (required by /usr/share/emacs/site-lisp/emacspeak/servers/linux-outloud/alsaparams)

I do not understand why.

file /usr/share/emacs/site-lisp/emacspeak/servers/linux-outloud/alsaparams
gives:
/usr/share/emacs/site-lisp/emacspeak/servers/linux-outloud/alsaparams: ELF 64-bit LSB pie executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, BuildID[sha1]=2396bafcd9b1ad53774a310d3285afbc27f6b417, not stripped

Cheers,
Didier