toolchain/57791: make: .ORDER vs. non-parallel makes

[dholland%NetBSD.org@localhost]

>Number:         57791
>Category:       toolchain
>Synopsis:       make: .ORDER vs. non-parallel makes
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    toolchain-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Dec 21 01:55:01 +0000 2023
>Originator:     David A. Holland
>Release:        NetBSD 10.99.10 (20231220)
>Organization:
>Environment:
System: NetBSD valkyrie 9.99.97 NetBSD 9.99.97 (VALKYRIE) #9: Thu Jun  2 20:39:54 EDT 2022  dholland@valkyrie:/usr/src/sys/arch/amd64/compile/VALKYRIE amd64
Architecture: x86_64
Machine: amd64
>Description:

Non-parallel makes ignore the .ORDER directive. This is, on the one
hand, reasonable. On the other, it means that in some cases "make" and
"make -j1" behave materially differently, and that seems undesirable.

I'm not sure what the resolution should be. I lean towards having
"make" and "make -j1" always do the same thing. Though maybe it's also
reasonable for this case to produce an error.

In any event the current behavior is not documented, and that's
definitely undesirable.


>How-To-Repeat:

   all: foo bar
   .ORDER: bar foo
   bar:
   	@echo bar
   foo:
   	@echo foo

 % make
 foo
 bar
 % make -j1
 bar
 foo
 %

>Fix:

Dunno, sorry, been too much change in make since I last looked at it.