Build fails on Ubuntu 20.04 platforms with "make: command: Command not found"

[andyedwardsibm]

Issue Description

Since 7832879 went in yesterday, building Podman is failing on Ubuntu bionic (20.04) platforms with the following error:

~/podman/conmon/podman$ make
make: command: Command not found
make: -c: Command not found
make: -c: Command not found
make: -c: Command not found
make: -c: Command not found
make: -c: Command not found
make: -c: Command not found
Makefile:170: *** Required variable NATIVE_GOOS value is undefined, whitespace, or empty.  Stop.

If I locally revert the change to the Makefile, or if I replace line 24 in the Makefile with SHELL := $(shell command -v bash;) then the make completes fine.

Steps to reproduce the issue

Steps to reproduce the issue

$# docker run --rm -it ubuntu:bionic

root@3d2afcc7bd1a:/# apt update && apt install -y make golang git
...
root@3d2afcc7bd1a:/# git clone https://github.com/containers/podman/
Cloning into 'podman'...
remote: Enumerating objects: 200207, done.
remote: Counting objects: 100% (1639/1639), done.
remote: Compressing objects: 100% (956/956), done.
remote: Total 200207 (delta 722), reused 1383 (delta 624), pack-reused 198568
Receiving objects: 100% (200207/200207), 139.04 MiB | 6.11 MiB/s, done.
Resolving deltas: 100% (143689/143689), done.
Checking out files: 100% (8193/8193), done.
root@3d2afcc7bd1a:/# cd podman
root@3d2afcc7bd1a:/podman# make
make: command: Command not found
make: -c: Command not found
make: -c: Command not found
make: -c: Command not found
make: -c: Command not found
make: -c: Command not found
make: -c: Command not found
Makefile:169: *** Required variable NATIVE_GOOS value is undefined, whitespace, or empty.  Stop.

Describe the results you received

make: command: Command not found

Describe the results you expected

a completed build

podman info output

(can't build podman)

Podman in a container

No

Privileged Or Rootless

None

Upstream Latest Release

Yes

Additional environment details

No response

Additional information

This looks similar to a problem that was fixed in containers/skopeo#1733 whereby command being a shell builtin somehow breaks the ability of make to find it. It's not a problem in Ubuntu 22.04, or on Red Hat. It can be fixed by adding a ; after the call. I'll make a PR for consideration

[andyedwardsibm]

#18837 created