P4merge git config
$ git config --global merge.tool p4merge
$ git config --global mergetool.p4merge.path 'C:\Program Files\Perforce\p4merge.exe'
Homeless Hare
$ git config --global merge.tool p4merge
$ git config --global mergetool.p4merge.path 'C:\Program Files\Perforce\p4merge.exe'