Thanks ETFbitcoin.
I didn't install with "--disable-wallet" and I'm on master
$ git branch -a
* master
remotes/origin/0.21
remotes/origin/22.x
remotes/origin/23.x
remotes/origin/24.x
remotes/origin/HEAD -> origin/master
remotes/origin/master
build-unix.md says:
Berkeley DB is required for the legacy wallet:
sudo dnf install libdb4-devel libdb4-cxx-devel
Have I install that and then re-compile ?
Don't I lose chain data ?