$ ldd ./chal ./chal: /lib/x86_64-linux-gnu/libc.so.6: version `GLIBC_2.34' not found (required by ./chal) linux-vdso.so.1 (0x00007ffd15def000) libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007fe684267000) /lib64/ld-linux-x86-64.so.2 (0x00007fe684470000)