Variable: makefile-backslash-column
makefile-backslash-column is a customizable variable defined in
make-mode.el.gz.
Value
48
Documentation
Column in which makefile-backslash-region inserts backslashes.
Source Code
;; Defined in /usr/src/emacs/lisp/progmodes/make-mode.el.gz
(defcustom makefile-backslash-column 48
"Column in which `makefile-backslash-region' inserts backslashes."
:type 'integer)