From mboxrd@z Thu Jan 1 00:00:00 1970 From: Arnout Vandecappelle Date: Wed, 19 Sep 2012 00:06:16 +0200 Subject: [Buildroot] Fwd: Re: Basic questions about using BuildRoot In-Reply-To: References: <5055A940.7070802@ronetix.at> <5055C935.3050108@ronetix.at> Message-ID: <5058F058.1020806@mind.be> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: buildroot@busybox.net On 09/17/12 12:43, Thomas De Schampheleire wrote: > If you're only interested in the rootfs, you could use the original, > working u-boot and use the rootfs from buildroot. Have you tried that? > >> > >> > One question beyond the theme: is it possible to build only Root FS >> > compatible with some external Kernel without any tool and if so how to do >> > that? Indeed, it is entirely possible to use buildroot to build a rootfs and combine it with a pre-built kernel. There is usually no dependency of an executable on a specific kernel version, because the kernel ABI is backward-compatible. When you build an internal or crosstool-NG toolchain in buildroot, however, do make sure that you use kernel headers with a sufficiently low version (smaller than or equal to the pre-built kernel you use). If you do want to build a custom kernel later on, you need two things: the source and the config. Whoever gave you the kernel binary is also obliged to give you the source (GPL), so that should be doable. The config you can usually get from the running kernel, in /proc/config.gz. Good luck! Regards, Arnout -- Arnout Vandecappelle arnout dot vandecappelle at essensium dot com Senior Embedded Software Architect . . +32-16-286540 . +32-478-010353 (mobile) Essensium, Mind division . . . . . . . . . . . . . . . . . http://www.mind.be G.Geenslaan 9, 3001 Leuven, Belgium . . . . . . . . BE 872 984 063 RPR Leuven LinkedIn profile: http://www.linkedin.com/in/arnoutvandecappelle GPG fingerprint: 31BB CF53 8660 6F88 345D 54CC A836 5879 20D7 CF43