Tzachi Noy

Makefile Cheatsheet

based on this

magic variables

main.o: main.c main.h
  $@   # "main.o" (target)
  $<   # "main.c" (first prerequisite)
  $^   # "main.c mian.h" (all prerequisites)

%.o: %.c
  $*   # the 'stem' with which an implicit rule matches ("foo" in "foo.c")

find files

verilog_files  := $(wildcard rtl/*.v)
all_files := $(shell find rtl -name "*")

assignments

uglify = $(uglify)        # lazy assignment
compressor := $(uglify)   # immediate assignment
prefix ?= /usr/local      # safe assignment
hello += world            # append

substitution

file     = $(SOURCE:.cpp=.o)   # foo.cpp => foo.o

command prefix

-cmd       # ignore error
@cmd       # do not print command

grouped targets

see here

foo bar biz &: baz boz
   echo hello