From: "Robert P. J. Day" <rpjday@crashcourse.ca>
To: OE Core mailing list <openembedded-core@lists.openembedded.org>
Subject: what is the value of 'BBPATH ?= ""' in layer.conf?
Date: Sun, 22 Nov 2015 04:10:51 -0500 (EST) [thread overview]
Message-ID: <alpine.LFD.2.20.1511220407380.13727@localhost> (raw)
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 ?= ""
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
--
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Robert P. J. Day Ottawa, Ontario, CANADA
http://crashcourse.ca
Twitter: http://twitter.com/rpjday
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next reply other threads:[~2015-11-22 9:10 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-22 9:10 Robert P. J. Day [this message]
2015-11-22 9:17 ` what is the value of 'BBPATH ?= ""' in layer.conf? Robert Yang
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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