> bitcoind is not statically linked against libc and other platform libraries iirc?

right, the distributed bitcoind binaries are statically linked against everything except libgcc and libc (and companion libs such as libm libatomic etc, if relevant to the platform)

this is the list of allowed dynamic deps (the second part is for bitcoin-qt so not relevant to bitcoind): https://github.com/bitcoin/bitcoin/blob/master/contrib/devtools/symbol-check.py#L95

statically linking to libc is under consideration but it comes with a few issues, so it's not an easy choice

> Is it even statically linked against openssl?

openssl is not used either statically or dynamically 

 TY