URL:
<https://savannah.gnu.org/bugs/?54791>
Summary: means to generate the list of dependencies for a
given target
Project: make
Submitted by: mgk25
Submitted on: Fri 05 Oct 2018 06:04:20 PM UTC
Severity: 3 - Normal
Item Group: Enhancement
Status: None
Privacy: Public
Assigned to: None
Open/Closed: Open
Discussion Lock: Any
Component Version: 4.1
Operating System: Any
Fixed Release: None
Triage Status: None
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Details:
It would be very useful to have an official means of generating a list of all
files on which a given target depends.
One existing way to generate such a list is to parse the output of option -d
for "Considering" lines, as in:
$ make -Bndr <target-file> | perl -ne "/Considering target file '(.+)'./ &&
print \"\$1\\n\""
But this *hack* is based on a potentially unstable format of a debugging
function, so not something recommendable for production scripts.
It would be nice to have both a proper command-line option
"make -D <target>" and a function $(dependencies <target>) to generate such a
list for <target>.
Example application: I want to find out what is the latest git commit that
modified any of the dependencies of <target> (for example to derive a version
number for that target from that commit using "git describe"). Using the
proposed facilities, I could do that with
$ make -D <target> | xargs git log -n1 --pretty=format:%H --
or inside a Makefile
git log -n1 --pretty=format:%H -- $(dependencies <target>)
_______________________________________________________
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