I'm back trying to run new programs on ancient linuxes, but this time I'm not going through the recompiling hassles I described here: https://adrianpopagh.blogspot.com/2021/06/installing-borg-backup-on-old-fedora.html Since I'm getting an error while compiling python3 as described above: # make gcc -pthread -Wl,-rpath /usr/local/lib -Xlinker -export-dynamic -o python Programs/python.o -L. -lpython3.9 -lcrypt -lpthread -ldl -lutil -lrt -lm -lm Programs/python.o(.text+0x1): In function `main': ./Programs/python.c:15: undefined reference to `Py_BytesMain' collect2: ld returned 1 exit status make: *** [python] Error 1 ... I'm trying to move the compiled code directly on this RHEL4 machine. Without success, sadly: # /opt/python3/bin/python3 /opt/python3/bin/python3: /lib64/tls/libc.so.6: version `GLIBC_2.7' not found (required by /opt/python3/lib/libpython3.9.so.1.0) /opt/python3/bin/python3: /lib64/tls/libc.so.6: version `GLIBC_2.6' not found (requir