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Date: Mon, 2 Jun 2014 11:17:28 +0200
From: Michael Olbrich <m.olbrich@pengutronix.de>
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Subject: Re: [ptxdist] [PATCH v3] image_tgz: Make label optional
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On Mon, May 26, 2014 at 09:13:25AM +0200, Alexander Dahl wrote:
> Am 2014-05-21 17:03, schrieb Alexander Dahl:
> > I'm not sure how to fix this, no time anymore today, so I let you know
> > this way.
> 
> Though I'm not entirely certain about some things in Makefiles I have a
> solution which works for me:
> 
> 
> % colordiff -bus ~/src/ptxdist/rules/post/image_tgz.make
> rules/post/image_tgz.make                                        :(
> --- /home/adahl/src/ptxdist/rules/post/image_tgz.make   2014-04-28
> 12:59:13.430666724 +0200
> +++ rules/post/image_tgz.make   2014-05-26 09:00:10.981436285 +0200
> @@ -13,7 +13,7 @@
>  ifdef PTXCONF_IMAGE_TGZ
>  IMAGE_TGZ_LABEL := $(call remove_quotes,$(PTXCONF_IMAGE_TGZ_LABEL))
>  ifneq ($(IMAGE_TGZ_LABEL),)
> -IMAGE_TGZ_LABEL_ARGS="--label '$(IMAGE_TGZ_LABEL)'"
> +IMAGE_TGZ_LABEL_ARGS=--label '$(IMAGE_TGZ_LABEL)'
>  endif
> 
>  $(IMAGEDIR)/root.tgz: $(STATEDIR)/image_working_dir
> 
> 
> So I removed the quotes when assigning IMAGE_TGZ_LABEL_ARGS because
> later in line 23 ${IMAGE_TGZ_LABEL_ARGS} was expanded to "something"
> which led to 
> 
> echo -n "tar "--label 'foo bar baz-myproject-2014.03.1'" -zcf ";
> 
> which is obviously wrong. With my change this is
> 
> echo -n "tar --label 'foo bar baz-myproject-2014.03.1' -zcf ";
> 
> But as I said, I'm not sure if this assignement is valid in Makefiles
> and I don't know (yet) what's the difference between $(something) and
> ${something} in a Makefile.

I don't think there is a difference between $(something) and ${something}
in a Makefile. This is the correct fix. I've pushed it.

Thanks,
Michael

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