On Tue, May 22, 2018 at 5:58 AM, <[email protected]> wrote: > Andre McCurdy wrote: >> 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. > > I recently ran into some major problems due to thumb vs arm. It turns out > glibc doesn't support systems with thumb disabled anymore. See this bug > report for details: > > https://sourceware.org/bugzilla/show_bug.cgi?id=23031 > > This might be useful input for this discussion also. >
Thanks, this would be useful for us to check if kernel defconfig does not disable CONFIG_ARM_THUMB on armv6t2+ regardless of this patch. This patch however will require this option enabled too. -- _______________________________________________ Openembedded-core mailing list [email protected] http://lists.openembedded.org/mailman/listinfo/openembedded-core
