conf/machine: Clean up MACHINEOVERRIDES handling

OVERRIDES reads from left to right, least to most specific. We were
appending to MACHINEOVERRIDES when we should have been prepending so
the ordering of qemuall verses qemuxxx was incorrect, as was the x86
override and several of the arm overrides. This patch is a batch cleanup
of the various issues to correct the order from least to most specific.
The include order does matter and we needed to tweak some of that in this
patch too.

[YOCTO #4090]

(From OE-Core rev: bdc1b214431c9c93a929b547b9a61e7b87fbd366)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

4 files changed, 4 insertions, 4 deletions

diff --git a/meta/conf/machine/include/arm/arch-armv4.inc b/meta/conf/machine/include/arm/arch-armv4.inc
index fcd56d72d9..5940467ae5 100644
--- a/meta/conf/machine/include/arm/arch-armv4.inc
+++ b/meta/conf/machine/include/arm/arch-armv4.inc
@@ -9,7 +9,7 @@ FIX_V4BX_ARMV4 = "${@bb.utils.contains("TUNE_FEATURES", "armv4", "--fix-v4bx", "
 FIX_V4BX_ARMV5 = "${@bb.utils.contains("TUNE_FEATURES", "armv5", "", "${FIX_V4BX_ARMV4}", d)}"
 FIX_V4BX = "${@bb.utils.contains("TUNE_FEATURES", "thumb", "", "${FIX_V4BX_ARMV5}", d)}"
 TARGET_LD_KERNEL_ARCH += "${FIX_V4BX}"
-MACHINEOVERRIDES .= "${@bb.utils.contains("TUNE_FEATURES", "armv4", ":armv4", "" ,d)}"
+MACHINEOVERRIDES =. "${@bb.utils.contains("TUNE_FEATURES", "armv4", "armv4:", "" ,d)}"
 
 require conf/machine/include/arm/arch-arm.inc
 require conf/machine/include/arm/feature-arm-thumb.inc
diff --git a/meta/conf/machine/include/arm/arch-armv5.inc b/meta/conf/machine/include/arm/arch-armv5.inc
index 5fdfa237ce..33fe401ee1 100644
--- a/meta/conf/machine/include/arm/arch-armv5.inc
+++ b/meta/conf/machine/include/arm/arch-armv5.inc
@@ -3,7 +3,7 @@ DEFAULTTUNE ?= "armv5"
 TUNEVALID[armv5] = "Enable instructions for ARMv5"
 TUNECONFLICTS[armv5] = "armv4"
 TUNE_CCARGS += "${@bb.utils.contains("TUNE_FEATURES", "armv5", "-march=armv5${ARMPKGSFX_THUMB}${ARMPKGSFX_DSP}", "", d)}"
-MACHINEOVERRIDES .= "${@bb.utils.contains("TUNE_FEATURES", "armv5", ":armv5", "" ,d)}"
+MACHINEOVERRIDES =. "${@bb.utils.contains("TUNE_FEATURES", "armv5", "armv5:", "" ,d)}"
 
 ARMPKGSFX_DSP = "${@bb.utils.contains("TUNE_FEATURES", [ "armv5", "dsp" ], "e", "", d)}"
 
diff --git a/meta/conf/machine/include/arm/arch-armv6.inc b/meta/conf/machine/include/arm/arch-armv6.inc
index ea6d73d0f7..882400ed0d 100644
--- a/meta/conf/machine/include/arm/arch-armv6.inc
+++ b/meta/conf/machine/include/arm/arch-armv6.inc
@@ -3,7 +3,7 @@ DEFAULTTUNE ?= "armv6"
 TUNEVALID[armv6] = "Enable instructions for ARMv6"
 TUNECONFLICTS[armv6] = "armv4 armv5"
 TUNE_CCARGS += "${@bb.utils.contains("TUNE_FEATURES", "armv6", "-march=armv6", "", d)}"
-MACHINEOVERRIDES .= "${@bb.utils.contains("TUNE_FEATURES", "armv6", ":armv6", "" ,d)}"
+MACHINEOVERRIDES =. "${@bb.utils.contains("TUNE_FEATURES", "armv6", "armv6:", "" ,d)}"
 
 require conf/machine/include/arm/arch-armv5-dsp.inc
 
diff --git a/meta/conf/machine/include/arm/arch-armv7a.inc b/meta/conf/machine/include/arm/arch-armv7a.inc
index a8ebd8219b..e876f33ddc 100644
--- a/meta/conf/machine/include/arm/arch-armv7a.inc
+++ b/meta/conf/machine/include/arm/arch-armv7a.inc
@@ -3,7 +3,7 @@ DEFAULTTUNE ?= "armv7a"
 TUNEVALID[armv7a] = "Enable instructions for ARMv7-a"
 TUNECONFLICTS[armv7a] = "armv4 armv5 armv6 armv7"
 TUNE_CCARGS += "${@bb.utils.contains("TUNE_FEATURES", "armv7a", "-march=armv7-a", "", d)}"
-MACHINEOVERRIDES .= "${@bb.utils.contains("TUNE_FEATURES", "armv7a", ":armv7a", "" ,d)}"
+MACHINEOVERRIDES =. "${@bb.utils.contains("TUNE_FEATURES", "armv7a", "armv7a:", "" ,d)}"
 
 require conf/machine/include/arm/arch-armv6.inc
 require conf/machine/include/arm/feature-arm-neon.inc