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We inherited this from a031b83a (Initial checkin from CRI-O repo,
2017-11-01), but:
* The output is actually going into bin/podman, so Make will rebuild
this target every time. You'll never be able to save compilation
because the target is newer than all the prerequisites.
* Make expands prerequisites immediately when loading a Makefile [1],
and on my wimpy Chromebook SD Card, this is *slow*:
$ time hack/find-godeps.sh ~/.local/lib/go/src/github.com/projectatomic/libpod cmd/podman github.com/projectatomic/libpod
...
real 0m56.225s
user 0m44.918s
sys 0m21.918s
* Go is pretty good at this on its own, so having make call 'go build'
every time will almost certainly be faster than us trying to mimic
this in a shell script. And by punting to Go in the recipe, Make
invocations that do not need the podman target (e.g. 'make help')
can skip the dependency lookup entirely.
[1]: https://www.gnu.org/software/make/manual/html_node/Reading-Makefiles.html#Rule-Definition
Signed-off-by: W. Trevor King <wking@tremily.us>
Closes: #776
Approved by: rhatdan
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