From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas Petazzoni Date: Mon, 22 Nov 2010 18:33:27 +0100 Subject: [Buildroot] Question about kernel defconfig Message-ID: <20101122183327.1285c439@surf> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: buildroot@busybox.net Hello Sam, I am currently working on cleaning up how Buildroot handles board configuration [1]. As part of this clean up, I'd like to move away from full kernel .config files and instead use minimal kernel configs (only non-default options are stored, the kernel configuration files are produced with savedefconfig). So, for example for the Qemu Versatile platform, I have the kernel configuration file visible at http://git.buildroot.net/~tpetazzoni/git/buildroot/tree/board/qemu/arm-versatile/linux-2.6.36.config?h=for-2010.11/boards-cleanup&id=8033fd6cbacfa96a3bcfce74caad8c423bf60cd1. When Buildroot configures the kernel, it simply copies the given kernel configuration file to .config into the kernel source tree. See http://git.buildroot.net/buildroot/tree/linux/linux.mk#n89. Unfortunately, with those minimal configuration files, the kernel "Restart config" and then asks interactively for the value of all options not specificied in the minimal configuration file. I'd like to have the same behaviour the kernel has when using its own internal defconfigs files from arch/$(ARCH)/configs. Is this possible ? Did I miss something totally obvious ? Thanks, Thomas [1] http://git.buildroot.net/~tpetazzoni/git/buildroot/log/?h=for-2010.11/boards-cleanup -- Thomas Petazzoni, Free Electrons Kernel, drivers, real-time and embedded Linux development, consulting, training and support. http://free-electrons.com