1
 2ifeq ($(and a,b),)
 3endif
 4ifeq (${and a,b},)
 5endif
 6ifeq (${and $(x),${or $(z),${q}}},)
 7endif
 8ifeq (${and ),(},)
 9endif
10ifeq ($(and },{),)
11endif
12# We can hide the comma in a variable
13C = ,
14ifeq ((and a$Cb),)
15endif
16all:;