From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas Petazzoni Date: Wed, 19 Aug 2015 19:46:43 +0200 Subject: [Buildroot] [PATCH v1 0/2] Checking whether a certain CONFIG_* is set In-Reply-To: <1439990076-10412-1-git-send-email-viktorin@rehivetech.com> References: <87lhd98twt.fsf@dell.be.48ers.dk> <1439990076-10412-1-git-send-email-viktorin@rehivetech.com> Message-ID: <20150819194643.1fad6062@free-electrons.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: buildroot@busybox.net Dear Jan Viktorin, On Wed, 19 Aug 2015 15:14:34 +0200, Jan Viktorin wrote: > this short patch series introduces a way how to check whether certain > CONFIG_* entries are set to an expected value in a selected .config > file. When building a package that requires a certain CONFIG_* to be > set (as in the case of xtables-addons), Buildroot can either force > to set the config or just error out a message. > > I could not find any suitable mechanism for this in Buildroot (if there > is one, please give me a reference) so I propose a simple extension of > KCONFIG_*_OPT util macros. It is then implemented for xtables-addons to > check whether CONFIG_MODULES are set in the Linux Kernel .config. There is some discussion already going on on this topic, around the pkg-kernel-module infrastructure. We recently committed a patch that makes the infrastructure verify that the kernel has been built with module support, and if not, bail out with a clear error message: http://git.buildroot.net/buildroot/commit/?id=8df95d926e963601c727defeb4ab90ce2368da70 However, Peter Korsgaard raised the concern that we should instead just forcefully enable CONFIG_MODULES=y in the configuration in such a case. There has then been some discussion with Yann on how to achieve that properly. Please see the thread at http://lists.busybox.net/pipermail/buildroot/2015-August/137511.html. Best regards, Thomas -- Thomas Petazzoni, CTO, Free Electrons Embedded Linux, Kernel and Android engineering http://free-electrons.com