Using sh in makefiles

[Bill Silvert]

Would like advice on how to use shell commands (such as if...) in
makefiles.  I know that it all has to be on one line, but the only way I
can make a command work is through a kludge like:

test:
	echo "if x;then y;fi" | sh

which seems pretty roundabout.  Is this the only way to do it?