local.conf.sample: use ?= to assign BB_ENV_EXTRAWHITE variables

Use ?= so that the BB_ENV_EXTRAWHITE variables can be overridden from
the environment.

[YOCTO #4367]

Signed-off-by: Jesse Zhang <sen.zhang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Jesse Zhang 2013-06-06 06:20:27 +00:00 committed by Richard Purdie
parent baff2630b3
commit 7f58f4c5f4
3 changed files with 6 additions and 6 deletions

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@ -17,12 +17,12 @@
# These two options control how much parallelism BitBake should use. The first
# option determines how many tasks bitbake should run in parallel:
#
#BB_NUMBER_THREADS = "4"
#BB_NUMBER_THREADS ?= "4"
#
# The second option controls how many processes make should run in parallel when
# running compile tasks:
#
#PARALLEL_MAKE = "-j 4"
#PARALLEL_MAKE ?= "-j 4"
#
# For a quad-core machine, BB_NUMBER_THREADS = "4", PARALLEL_MAKE = "-j 4" would
# be appropriate for example.

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@ -82,7 +82,7 @@
# Use "external-MODE" to use the precompiled external toolchains where MODE
# is the type of external toolchain to use e.g. eabi. You need to ensure
# the toolchain you want to use is included in an appropriate layer
# TCMODE = "external-eabi"
# TCMODE ?= "external-eabi"
# mklibs library size optimization is more useful to smaller images,
# and less useful for bigger images. Also mklibs library optimization

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@ -19,10 +19,10 @@ SCONF_VERSION = "1"
# To use git with a proxy, you must use an external git proxy command, such as
# the one provided by scripts/oe-git-proxy.sh. To use this script, copy it to
# your PATH and uncomment the following:
#GIT_PROXY_COMMAND="oe-git-proxy"
#ALL_PROXY="socks://socks.example.com:1080"
#GIT_PROXY_COMMAND ?= "oe-git-proxy"
#ALL_PROXY ?= "socks://socks.example.com:1080"
#or
#ALL_PROXY="https://proxy.example.com:8080"
#ALL_PROXY ?= "https://proxy.example.com:8080"
# If you wish to use certain hosts without the proxy, specify them in NO_PROXY.
# See the script for details on syntax.