Can I use make conditionals with elif too?

Question

I can do simple checks with make's conditionals, like that:

var = yes
ifeq $(var) "yes"; then
    echo "yes"
else
    echo "no"
fi

But the docs say nothing about elif. Can I do it like the following ?

var = yes
ifeq $(var) "yes"; then
    echo "yes"
elifeq $(var) "no"; then
    echo "no"
else
    echo "invalid"
fi

If not, is that possible at all, or do I have to make nested conditions or use test ?

Answer 1

Can I do it like the following ?

No. You cannot use elifeq.

do I have to make nested conditions or use test ?

No. The documentation says:

The syntax of a complex conditional is as follows: ... or:

conditional-directive-one
text-if-one-is-true
else conditional-directive-two
text-if-two-is-true
else
text-if-one-and-two-are-false
endif

There can be as many “else conditional-directive” clauses as necessary.

Note here it says else conditional-directive-two. So, you can write:

var = yes
ifeq ($(var),yes)
    $(info "yes")
else ifeq ($(var),no)
    $(info "no")
else
    $(info "invalid")
endif

Note your original syntax is not valid makefile syntax. It looks like you're trying to use shell syntax: a makefile is not a shell script and doesn't use the same syntax.