From: Brian Murphy <brian@murphy.dk>
To: Jun Sun <jsun@mvista.com>
Cc: linux-mips@linux-mips.org
Subject: Re: [PATCH] allow CROSS_COMPILE override
Date: Thu, 20 Feb 2003 23:03:38 +0100 [thread overview]
Message-ID: <3E5550BA.4050107@murphy.dk> (raw)
In-Reply-To: 20030220132300.I7466@mvista.com
Jun Sun wrote:
>Is this allowed? Can't find any such usage in kernel other
>than the worrisome comment below:
>
>arch/arm/Makefile:# Grr, ?= doesn't work as all the other assignment operators do. Make bug?
>
>
>
>
The arm code does this:
# Only set INCDIR if its not already defined above
# Grr, ?= doesn't work as all the other assignment operators do. Make bug?
ifeq ($(origin INCDIR), undefined)
INCDIR := $(MACHINE)
endif
where the make docs say:
INCDIR ?= $(MACHINE)
is the same as
ifeq ($(origin INCDIR), undefined)
INCDIR = $(MACHINE)
endif
which means INCDIR will reflect changes to MACHINE.
The := form sets INCDIR once and for all. What do you want?
I can't see that this should be a problem in the arm makefile.
Perhaps I'm missing something.
/Brian
next prev parent reply other threads:[~2003-02-20 22:03 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-02-20 20:47 [PATCH] allow CROSS_COMPILE override Jun Sun
2003-02-20 21:15 ` Brian Murphy
2003-02-20 21:23 ` Jun Sun
2003-02-20 21:35 ` Brian Murphy
2003-02-20 21:57 ` Pete Popov
2003-02-20 22:03 ` Brian Murphy [this message]
2003-02-21 0:08 ` Jun Sun
2003-02-20 21:57 ` Daniel Jacobowitz
2003-02-20 22:06 ` Brian Murphy
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