distclean is dependent on the target mrproper and then removes editor backup files and patch files, i. e. all files that match the following globs (except they are listed in RCS_FIND_IGNORE): *.orig
*.rej
*~
*.bak
#*#
*%
core
tags
TAGS
cscope*
GPATH
GRTAGS
GSYMS
GTAGS