how to debug GLIBC issues?

[ahoward]

in producing a basic hello world, on an ubuntu box, and then trying to run it locally on my laptop (which has no ruby installed and is a good test case) i will get

ahoward@penguin:~$ ./senv 
./senv: /lib/x86_64-linux-gnu/libcrypt.so.1: version `XCRYPT_2.0' not found (required by ./senv)
./senv: /lib/x86_64-linux-gnu/libm.so.6: version `GLIBC_2.29' not found (required by ./senv)

what strategy would you recommend to debug this? by debug, i mean determining a workaround.

[ahoward]

also, fwiw, i get this same issue from the reference compiled ruby here

when i run it, it looks like:

https://github.com/enclose-io/ruby/releases/download/v2.7.1-linux/ruby

ahoward@penguin:~/tmp$ curl -sLO https://github.com/enclose-io/ruby/releases/download/v2.7.1-linux/ruby
ahoward@penguin:~/tmp$ chmod 755 ./ruby
ahoward@penguin:~/tmp$ ./ruby
./ruby: /lib/x86_64-linux-gnu/libcrypt.so.1: version `XCRYPT_2.0' not found (required by ./ruby)
./ruby: /lib/x86_64-linux-gnu/libm.so.6: version `GLIBC_2.29' not found (required by ./ruby)
ahoward@penguin:~/tmp$ uname -a
Linux penguin 5.4.58-07649-ge120df5deade #1 SMP PREEMPT Wed Aug 26 04:56:33 PDT 2020 x86_64 GNU/Linux