Re: [Qemu-devel] [PATCH v2 03/13] build-sys: add a rule to print a variable

[Eric Blake <eblake@redhat.com>]

On 12/19/2017 09:45 AM, Marc-André Lureau wrote:

>>> +Useful make targets
>>> +===================
>>> +
>>> +- help
>>> +
>>> +  Print a help message for the most common build targets.
>>
>> Except that this patch forgot to tweak 'make help' to mention 'make
>> print-VAR' ;)
> 
> Well, I don't think print-VAR is a common build target, it's a
> build-sys hack/debug imho, so having it described in build-system.txt
> only make sense.
> 
> Do you agree?

With the bash-completion library installed, performing tab-completion on 
'make ' produces a large list of targets, which includes 'help', but 
even with your patch does NOT include 'print-CFLAGS' or any variant of 
print-.  If I use just tab-completion and 'make help', then having 
'print-FOO' listed under the "Generic targets:" section of the help 
output would let me discover it without me having to read build-system.txt.

Does anyone else have a strong opinion for or against the additional 
output in 'make help'?

-- 
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3266
Virtualization:  qemu.org | libvirt.org