Presentation

Provides flymake backends for makefile files.

There are currently 2 backends:

• make: make is called on a dummy target
• checkmake: checkmake is a makefile linter

Admonition

Be careful, make backend can lead to a security risk, as the execution of untrusted makefiles can lead to the execution of malicious code, and is disable by default.

To enable it you must set `flymake-makefile-use-make-backend' to t. This can be done per directory:

;;; .dir-locals.el
((makefile-mode . ((flymake-makefile-use-make-backend . t))))

By default the make command is run in a firejail sandbox, restricting read-only access to the user's directory. Firejail can be installed from most Linux distributions.

# Executing this Makefile will have no side effect
my-var := $(shell echo attack > attack)
target:
    some-action

Usage

(require 'flymake-makefile)
(add-hook 'makefile-mode-hook #'flymake-makefile-mode-hook)