makefile-macroassign-regex

makefile-macroassign-regex is a variable defined in `make-mode.el'.
Its value is

"\\(?:^\\|^export\\|^override\\|:\\|: *override\\) *\\([^ \n	][^:#= 	\n]*\\)[ 	]*\\(?:!=\\|[*:+]?[:?]?=\\)"

• This variable may be risky if used as a file-local variable.

Documentation:
Regex used to find macro assignment lines in a makefile.