ffap-makefile-vars.el

ffap-makefile-vars.el extends Emacs ffap to recognise and expand makefile variables like

$(FOO)

based on definitions in the file or the environment

FOO=$(HOME)/$(WORKDIR)
WORKDIR=some/thing

ffap already expands shell variables like $HOME, but ffap-makefile-vars.el extends it to makefile style.

ffap-makefile-vars.el is free software (free as in freedom), published under the terms of the GNU General Public License (v3 or up). Download version 4 here, or in my miscbits-el collection:

ffap-makefile-vars.el (9k, and sig)

The sig file is an Gnu PG ascii armoured signature generated from my key.