Cool new trick!
However, this won't retain the THUMB2 config upon running oldconfig again, since ARCH_OMAP2 and THUMB2 can't coexist.
So we'd have to do,
scripts/config --disable CONFIG_ARCH_OMAP2 scripts/config --enable CONFIG_THUMB2_KERNEL.
So my original set of instructions becomes,
make ARCH=arm CROSS_COMPILE=arm- omap2plus_defconfig scripts/config --disable CONFIG_ARCH_OMAP2 scripts/config --enable CONFIG_THUMB2_KERNEL yes "" | make ARCH=arm oldconfig grep THUMB2 .config
/Amit On Thu, Oct 20, 2011 at 11:04 PM, S, Venkatraman svenkatr@ti.com wrote:
You should use the "config" script inside the scripts directory in the Kernel. Example: (in the kernel root directory) make ARCH=arm CROSS_COMPILE=arm- omap2plus_defconfig scripts/config --enable CONFIG_THUMB2_KERNEL
Regards, Venkat.
On Thu, Oct 20, 2011 at 6:43 PM, Deepti Kalakeri deepti.kalakeri@linaro.org wrote:
Hello All,
I have a need to enable thumb2 kernel option for kernel built using omap2plus_defconfig. Hence I am trying to find a mechanism to automatically enable the thumb2 kernel config option. I have tried adding the CONFIG_THUMB2_KERNEL=y option to the .config file by
- Appending it to the end of the .config using the echo
CONFIG_THUMB2_KERNEL=y >> output_dir/.config 2) By replacing the CONFIG_ARM_THUMB=y with CONFIG_THUMB2_KERNEL=y option using the sed -ie 's/CONFIG_ARM_THUMB=y/CONFIG_THUMB2_KERNEL=y/g' output_dir/.config
I follow this with the make oldconfig for ex:
yes "" | make ARCH=arm O=output_dir KERNELVERSION=3.0.5-758-g051c523-omap2plus-linaro-omap KERNELRELEASE=3.0.5-758-g051c523-omap2plus-linaro-omap CROSS_COMPILE=arm-linux-gnueabi- oldconfig
Both the above mechanisms work, but once I run oldconfig the .config is getting overwritten and it gets back to the old state.
I am sure there is something which I am missing. Can you let me know the exact steps to overwrite the .config file.
- I want to be able to overwrite the THUMB option with THUMB2 or add the
THUMB2 option ( if existence of both THUMB and THUMB2 in the .config is permissible) 2) What would happen if both the CONFIG_ARM_THUMB=y and CONFIG_THUMB2_KERNEL=y options are present in the .config. Would the kernel be built with CONFIG_ARM_THUMB=y or CONFIG_THUMB2_KERNEL=y ?
Do you have any suggestions to enable the THUMB2 option in a non-interactive way ?
-- Thanks and Regards, Deepti Infrastructure Team Member, Linaro Platform Teams Linaro.org | Open source software for ARM SoCs Follow Linaro: http://www.facebook.com/pages/Linaro http://twitter.com/#%21/linaroorg - http://www.linaro.org/linaro-blog
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