How can I use .NOTPARALLEL in makefile only on specific targets?

Question

I have 5 labels in Makefile:

all: label1 label2 label3 label4 last_label

I want last_label to be done last, and I want to use

Answer 1

Create a target specifying the four targets that can be executed in parallel & include this and last_label in the all target:

intermediate: label1 label2 label3 label4

all:
        $(MAKE) intermediate
        $(MAKE) last_label

This would execute the targets specified within intermediate in parallel, but intermediate and last_label would be forced consecutively.

(Note that the leading space before $(MAKE) is a TAB character.)