Computing Makefile variable on assignment

Question

In a Makefile, I\'m trying to assign the result of a shell command to a variable:

TMP=`mktemp -d /tmp/.XXXXX`

all:
    echo $(TMP)
    echo $(TMP)

Answer 1

If you’re using GNU Make, instead of using backticks, use $(shell ...). For example,

TMP=$(shell mktemp -d /tmp/.XXXXX)