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makefilegnu-make

gnu make: list the values of all variables (or "macros") in a particular run

How can I list the current value of all variables (also called macros) in a Makefile when running make?

E.g. if this is in the Makefile:

CUR-DIR := $(shell /bin/pwd)
LOG-DIR := $(CUR-DIR)/make-logs

Then I would like it to tell me:

CUR-DIR = /home/johv/src/test
LOG-DIR = /home/johv/src/test/make-logs
Solution

  • I ended up doing it like this:

    gmake -pn | grep -A1 "^# makefile"| grep -v "^#\|^--" | sort | uniq > makevars.txt

    which gives:

    CUR-DIR := /home/johv/src/test
LOG-DIR := /home/johv/src/test/make-logs
MAKEFILE_LIST :=  Makefile
MAKEFLAGS = pn
SHELL = /bin/sh
VARS_OLD := [...]

    gmake -pn is really verbose and looks kinda like this:

    # environment
GNOME2_PATH = /usr/local:/opt/gnome:/usr:/usr/local:/opt/gnome:/usr
# automatic
@F = $(notdir $@)
# makefile
SHELL = /bin/sh
# default
RM = rm -f