From: Robert Yang <liezhi.yang@windriver.com>
To: "Robert P. J. Day" <rpjday@crashcourse.ca>,
OE Core mailing list <openembedded-core@lists.openembedded.org>
Subject: Re: what is the value of 'BBPATH ?= ""' in layer.conf?
Date: Sun, 22 Nov 2015 17:17:06 +0800 [thread overview]
Message-ID: <56518812.2030705@windriver.com> (raw)
In-Reply-To: <alpine.LFD.2.20.1511220407380.13727@localhost>
On 11/22/2015 05:10 PM, Robert P. J. Day wrote:
>
> perusing some wind river layers, and in the layer.conf file here:
>
> https://github.com/WindRiver-OpenSourceLabs/wr-kernel/blob/LB21_7.0_RCPL0002/conf/layer.conf
>
> i see the opening snippet:
>
> BBPATH ?= ""
> # We have a conf and classes directory, add to BBPATH
> BBPATH := "${LAYERDIR}:${BBPATH}"
>
> what is the purpose of that initial assignment
>
> BBPATH ?= ""
There would be a warning when BBPATH is null, but that had been fixed,
so we don't need it nowadays.
// Robert
>
> if that variable has no value, won't it just expand to the empty
> string so that the eventual effect is the same? or is there something
> more subtle happening here?
>
> rday
>
next prev parent reply other threads:[~2015-11-22 9:17 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-22 9:10 what is the value of 'BBPATH ?= ""' in layer.conf? Robert P. J. Day
2015-11-22 9:17 ` Robert Yang [this message]
2015-11-22 9:29 ` Robert P. J. Day
2015-11-22 9:38 ` Robert Yang
2015-11-23 14:16 ` Mark Hatle
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