kmsheng

all: target1 target2

target1:
  @echo "Running $@"

target2:
  @echo "Running $@"

kmsheng

all:
  @echo "No target goes here"
  
target%:
  @echo "\"\$$@\" = $@"
  @echo "\"\$$*\" = $*"
  @echo "\$$@ =" $@
  @echo "\$$* =" $*

kmsheng

WGET_PATH := /wrong/path

ifeq ($(WGET_PATH), /wrong/path)
  WGET_PATH := /usr/bin/wget
endif

all:;@echo $(WGET_PATH)

kmsheng

$(error Something is wrong here)
all:;@echo "success"

kmsheng

PATHS=$(wildcard /usr/bin/*)
all:;@echo $(PATHS);

kmsheng

TIMESTAMP := $(shell date +%s)
all:;@echo $(TIMESTAMP);

kmsheng

A := "A"
B += "B"
all:;@echo $(A);

kmsheng

A :=
A ?= "A"
all:;@echo $(A)

kmsheng

A := "A"
B := $(A)
all:;@echo $(B)

kmsheng

A = $(B)
B = "B"
all:;@echo $(A)