I am using Emacs 26.4 from ubuntu repository on ubuntu 20.04.
I have swtiched from ESS by the ubuntu repository to the MELPA ESS, in order to have ESS working with R-4 (see this: ESS start process does not include new R version).
I have two inconveniences:
how to have the smart underscore? I have tried a package but I did not manage to make it work
I have install
auto-complete
, but still have the issue:ess-command: Symbol’s function definition is void: ess-local-process-name