From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Jan Beulich" <JBeulich@suse.com>
Subject: Re: Build problems with xen 4.7
Date: Wed, 02 Dec 2015 03:05:00 -0700
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To: M A Young <m.a.young@durham.ac.uk>
Cc: Marcos Matsunaga <marcos.matsunaga@oracle.com>, xen-devel@lists.xen.org
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>>> On 01.12.15 at 19:47, <m.a.young@durham.ac.uk> wrote:
> On Tue, 1 Dec 2015, Jan Beulich wrote:
>> I.e. there must be something different in how make gets invoked or
>> the environment set up.
> 
> It happens if CFLAGS is set to anything as a environment variable, eg.
> export CFLAGS=" "
> make dist-xen

Ugly, but I think it could be worked around (if we really want to
support CFLAGS coming in from the command line), along the lines
of

ABC_ORIG := $(ABC)
unexport ABC
MAKE := ABC=$(ABC_ORIG) $(MAKE)
ABC += xyz

all:
	@echo $@: 'ABC=$(ABC)' "ABC=$$ABC"
	$(MAKE) test

test:
	@echo $@: 'ABC=$(ABC)' "ABC=$$ABC"

Jan