1 MAKEVER:=$(shell make --version | ruby -n0e 'puts $$_[/Make (\d)/,1]') 2 3 ifeq ($(MAKEVER),4) 4 # A variable name with space is invalid on GNU make 4. 5 all: 6 echo PASS 7 else 8 varname_with_ws:=hello, world! 9 $(varname_with_ws):=PASS 10 foo bar = PASS2 11 all: 12 echo $(hello, world!) 13 echo $(foo bar) 14 endif 15
