Although there may still be specific cases which can benefit from the ARM instruction set, the Thumb2 instruction set is generally a better default for armv7a class CPUs. Distros such as Debian and Fedora have been targeting Thumb2 by default for some time.
Note that setting ARM_INSTRUCTION_SET has no effect unless TUNE_FEATURES contains "thumb" (which is controlled by the "t" suffix in DEFAULTTUNE, e.g. armv7vehf-neon -vs- armv7vethf-neon, etc) so out of tree machine configs may need to update their DEFAULTTUNE to take advantage of this change. Signed-off-by: Andre McCurdy <armccu...@gmail.com> --- meta/conf/machine/include/arm/arch-armv7a.inc | 1 + 1 file changed, 1 insertion(+) diff --git a/meta/conf/machine/include/arm/arch-armv7a.inc b/meta/conf/machine/include/arm/arch-armv7a.inc index bad1c27..a2663d8 100644 --- a/meta/conf/machine/include/arm/arch-armv7a.inc +++ b/meta/conf/machine/include/arm/arch-armv7a.inc @@ -1,4 +1,5 @@ DEFAULTTUNE ?= "armv7athf" +ARM_INSTRUCTION_SET ?= "thumb" TUNEVALID[armv7a] = "Enable instructions for ARMv7-a" TUNECONFLICTS[armv7a] = "armv4 armv5 armv6 armv7" -- 1.9.1 -- _______________________________________________ Openembedded-core mailing list Openembedded-core@lists.openembedded.org http://lists.openembedded.org/mailman/listinfo/openembedded-core
