linux-kernel - Re: make -C tools clean failure on older systems

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Message-ID: <20150514174222.GC19338@gmail.com>
Date:	Thu, 14 May 2015 19:42:22 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:	Shuah Khan <shuahkh@....samsung.com>,
	Michael Ellerman <mpe@...erman.id.au>,
	David Ahern <dsahern@...il.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: make -C tools clean failure on older systems


* Arnaldo Carvalho de Melo <acme@...nel.org> wrote:

> > > @@ -27,7 +27,7 @@ TARGETS_HOTPLUG += memory-hotplug
> > >  # Makefile to avoid test build failures when test
> > >  # Makefile doesn't have explicit build rules.
> > >  ifeq (1,$(MAKELEVEL))
> > > -undefine LDFLAGS
> > > +override LDFLAGS =
> > >  override MAKEFLAGS =
> > >  endif
> > 
> > I recall testing with override and remember it to not work. If you would
> 
> bummer, then its not that easy, I thought it was an oversight, but 
> if you tested it and it didn't work, nevermind, no need, I guess, to 
> support older systems if it requires more, non trivial, work.

So what's the 'make' version cutoff for this capability?

We should not require insane hacks, the minimum required make version 
for the kernel, as per Documentation/Changes, is v3.80:

 o  GNU make               3.80                    # make --version

Thanks,

	Ingo
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