[RFC] bitbake.conf: exclude whole MACHINEOVERRIDES from OVERRIDES vardeps

[Martin Jansa <martin.jansa@gmail.com>]

* whole MACHINEOVERRIDES can change e.g. between MACHINES with different arm architecture, causing allarch packages to reexecute do_package
  bitbake-diffsigs ../shr-core/tmp-eglibc/stamps/all-oe-linux/xserver-nodm-init-2.0-r16.do_package.sigdata.90e760a8f6cecbd87cb2e95f1237e3cc ../shr-core/tmp-eglibc/stamps/all-oe-linux/xserver-nodm-init-2.0-r16.do_package.sigdata.9eeccfd15f25032b3b6b132534660fff
  basehash changed from 7618e17d3fda05d1f15246e6800ca0f0 to 97bc4dc8c1521c535bd96b2aa62d8a03
  Variable MACHINEOVERRIDES value changed from ${MACHINE}${@bb.utils.contains("TUNE_FEATURES", "armv5", ":armv5", "" ,d)}${@bb.utils.contains("TUNE_FEATURES", "armv4", ":armv4", "" ,d)}:${MACHINE_CLASS} to ${MACHINE}${@bb.utils.contains("TUNE_FEATURES", "armv7a", ":armv7a", "" ,d)}${@bb.utils.contains("TUNE_FEATURES", "armv6", ":armv6", "" ,d)}${@bb.utils.contains("TUNE_FEATURES", "armv5", ":armv5", "" ,d)}${@bb.utils.contains("TUNE_FEATURES", "armv4", ":armv4", "" ,d)}:${MACHINE_CLASS}

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
---
 meta/conf/bitbake.conf |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/meta/conf/bitbake.conf b/meta/conf/bitbake.conf
index 1525e44..163b311 100644
--- a/meta/conf/bitbake.conf
+++ b/meta/conf/bitbake.conf
@@ -652,6 +652,7 @@ AUTO_LIBNAME_PKGS = "${PACKAGES}"
 # This works for  functions as well, they are really just environment variables.
 # Default OVERRIDES to make compilation fail fast in case of build system misconfiguration.
 OVERRIDES = "${TARGET_OS}:${TRANSLATED_TARGET_ARCH}:build-${BUILD_OS}:pn-${PN}:${MACHINEOVERRIDES}:${DISTROOVERRIDES}:${CLASSOVERRIDE}:forcevariable"
+OVERRIDES[vardepsexclude] = "MACHINEOVERRIDES"
 CLASSOVERRIDE ?= "class-target"
 DISTROOVERRIDES ?= "${@d.getVar('DISTRO', True) or ''}"
 MACHINEOVERRIDES ?= "${MACHINE}"
-- 
1.7.8.6