Simplest way to reverse the order of strings in a make variable

Question

Let\'s say you have a variable in a makefile fragment like the following:

MY_LIST=a b c d

How do I then reverse the order of that list? I need

Answer 1

A solution in pure GNU make:

default: all

foo = please reverse me

reverse = $(if $(1),$(call reverse,$(wordlist 2,$(words $(1)),$(1)))) $(firstword $(1))

all : @echo $(call reverse,$(foo))

Gives:

$ make

me reverse please