| MAKEVER:=$(shell make --version | ruby -n0e 'puts $$_[/Make (\d)/,1]') | |
| ifeq ($(MAKEVER),4) | |
| # A variable name with space is invalid on GNU make 4. | |
| all: | |
| echo PASS | |
| else | |
| varname_with_ws:=hello, world! | |
| $(varname_with_ws):=PASS | |
| foo bar = PASS2 | |
| all: | |
| echo $(hello, world!) | |
| echo $(foo bar) | |
| endif |