#!/usr/bin/env make -f # the first line is a "shebang" to allow the script to be directly executed # The first target found is the default "goal" # it will be executed if 'make' is not given a goal on the command line # Convention is to have it depend on the targets ("prerequisites") # that will create the project without further intervention all: build install echo "target: $(@)" # This is a "recipe" - a list of shell commands to execute # It MUST be indented by one or more tab characters NOT spaces # It can contain Automatic Variables as shown here # $(@) expands to "all" - the name of the current target # If the first target isn't the default goal set it explicitly # rather than re-ordering targets in the Makefile .DEFAULT_GOAL := build # If a target is not a real file tell 'make' so it handles it correctly .PHONY: all # For portability recipes should only use POSIX shell syntax # however, sometimes a specific shell may be required SHELL := /usr/bin/env bash # ideally options could be passed to the shell # but only recent versions of "env" have the -S|--split option # so this would not be portable: SHELL := /usr/bin/env --split bash -o pipefail # However, 'make' has a way to pass arguments to the shell # so this would be (more) portable: SHELL := /usr/bin/bash .SHELLFLAGS := -o pipefail -c build: @echo "Must build the project"