Makefile - list all available commands

Makefile

.PHONY: default list

default: list

list:
	@echo Available make targets:
	@LC_ALL=C $(MAKE) -pRrq -f $(lastword $(MAKEFILE_LIST)) : 2>/dev/null \
		| sed -e '0,/^# Files/ d' -e '/^# Not a target:/,+1 d' \
		| grep '^[[:alnum:]]' \
		| sed 's/:.*//'

More readable version of https://stackoverflow.com/questions/4219255/how-do-you-get-the-list-of-targets-in-a-makefile/26339924#26339924