Messages in this thread | | | Date | Fri, 22 Feb 2002 11:56:31 -0800 (PST) | From | "Randy.Dunlap" <> | Subject | Re: How to check the kernel compile options ? |
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On Sat, 16 Feb 2002, Andreas Ferber wrote:
| On Fri, Feb 15, 2002 at 03:51:43PM -0700, Andreas Dilger wrote: | > | > Note also that it is enough to store the config options without the | > leading CONFIG_ part, and then use 'grep "[A-Z0-9]*=[ym]$"' to get | > the actual config strings. You can add a final 'sed "s/^/CONFIG_/"' | > step to return it to the original format. So:
except that not all options are "=[ynm]$"; some are string values.
| Note that you also need some way to keep the config symbols which are | set to "n" and commented out in the .config. Otherwise you will have | to answer a lot of questions on "make oldconfig" ("yes n | make | oldconfig" isn't an option, as this doesn't tell you which config | symbols have been added).
Oh, thanks for pointing that out.
Will yes n | make oldconfig build a kernel with the current y/m options still intact, but any new or missing options set to 'n'? That doesn't sound so bad, but not optimal either.
| I have actually done my own patch to include the .config into the | kernel image some time ago. It provides the .config via | /proc/config{,.gz,.bz2} (the compression method to use is | configurable). Apart from compression, it doesn't try to do anything | special to reduce size, because I don't have any machines where it | actually matters if the kernel needs some kB more or less memory. | | I didn't bother to submit the patch because of the discussions on this | topic in the past, instead I keep patching kernel sources myself | before compiling a kernel. Anyone interested can get the patch from | <http://www.myipv6.de/patches/kconfig/>. Patches for new kernel | versions are uploaded occasionally, everytime I don't forget to rediff | it before applying other patches to the source tree ;-) (possibly | conflicting parts for other kernel versions are Makefiles, config.in | or Configure.help, which can all be hand-applied easily, even if you | are not a kernel hacker ;-). It works for both 2.2 and 2.4 (probably | 2.5 also, didn't test yet). | | Any comments on the patch are welcome ;-)
I looked. It does nicely if that's where you want to store and find the .config. I'd rather have it associated with a kernel image file and accessible even if the kernel isn't running.
Thanks, -- ~Randy
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