redstar@redstar-pc:~/proj/boards$ git mergetool

This message is displayed because 'merge.tool' is not configured.
See 'git mergetool --tool-help' or 'git help config' for more details.
'git mergetool' will now attempt to use one of the following tools:
meld opendiff kdiff3 tkdiff xxdiff tortoisemerge gvimdiff diffuse diffmerge ecmerge p4merge araxis bc3 codecompare emerge vimdiff
No files need merging