How to Get a List of Direct Dependencies on a Makefile Target

Question

I am working on a project which has a little complicated Makefile.

It has a lot of function calls and string substitutes to get the list of objects and phony targets.

I am trying to get the direct dependency on an target, e.g.

FOO_VAR := abc def ghi

test: \
foo \
bar \
$(FOO_VAR) \
whatever

I should get

foo
bar
abc
def
ghi
whatever

Even if these targets have further dependencies.

I have followed

to use make -qp | awk -F':' '/^[a-zA-Z0-9][^$#\/\t=]*:([^=]|$)/ {split($1,A,/ /);for(i in A)print A[i]}'

However it will return all the targets, not just direct dependencies.

You want the direct prerequisites of a single target or its entire prerequisite chain (that is the prereqs of its prereqs, etc.)? — Etan Reisner, Jul 15 '14 at 18:32

score 2 · Accepted Answer · edited May 23 '17 at 11:52

2

Does make -qp | grep 'target:' do what you want?

Or possibly make -qp | grep 'target.*:' (in case it isn't the only/last target on that line)?

Also see Eric Melski's answer for a more efficient (but longer and requires small prep-work) command to run for the make bit of that pipeline.

edited May 23 '17 at 11:52

Community

answered Jul 15 '14 at 18:46

Etan Reisner

1 Answers1