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bitbake.conf: Fix up OVERRIDES documentation (some bits from OE) and also add forcevariable OVERRIDE

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Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
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Richard Purdie
2010-08-12 15:05:57 +01:00
parent 9ef9b5e1a7
commit bb175ec208
1 changed files with 10 additions and 6 deletions
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16
meta/conf/bitbake.conf
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@@ -597,16 +597,20 @@ AUTO_LIBNAME_PKGS = "${PACKAGES}"
### Config file processing
###
# Overrides are processed left to right, so the ones that are named later take precedence.
# You generally want them to go from least to most specific.
#
# This means that an envionment variable named '<foo>_arm' overrides an
# environment variable '<foo>' (when ${TARGET_ARCH} is arm). And the same: an
# environment variable '<foo>_ramses' overrides both '<foo>' and '<foo>_arm
# when ${MACHINE} is 'ramses'. And finally '<foo>_local' overrides anything.
# environment variable '<foo>' (when ${TARGET_ARCH} is arm).
# An environment variable '<foo>_ramses' overrides '<foo>' but doesn't override
# '<foo>_arm' when ${MACHINE} is 'ramses'.
# If you use combination ie '<foo>_arm_ramses', then '<foo>_arm_ramses' will override
# '<foo>_arm' and then '<foo>' will be overriden with that value from '<foo>_arm'.
# And finally '<foo>_local' overrides any standard variable, but with lowest priority.
#
# This works for functions as well, they are really just environment variables.
# Default OVERRIDES to make compilation fail fast in case of build system misconfiguration.
OVERRIDES = "local:${MACHINE}:${DISTRO}:${TARGET_OS}:${TARGET_ARCH}:build-${BUILD_OS}:fail-fast:pn-${PN}"
# Alternative OVERRIDES definition without "fail fast", usually only for native building and Scratchbox toolchains.
#OVERRIDES = "local:${MACHINE}:${DISTRO}:${TARGET_OS}:${TARGET_ARCH}:build-${BUILD_OS}:pn-${PN}"
OVERRIDES = "local:${MACHINE}:${DISTRO}:${TARGET_OS}:${TARGET_ARCH}:build-${BUILD_OS}:fail-fast:pn-${PN}:forcevariable"
CPU_FEATURES ?= ""
CPU_FEATURES_arm ?= "vfp"