Linux Kernel Configuration

Tue Oct 21 18:50:22 GMT 2003 Linux Kernel Configuration

I read in the latest Linux Journal that the 2.6 Linux kernel will be able to show its actual configuration under /proc, and that building a new kernel con take that information. That will be a big help. You can't really tell what the current config is now - you can guess that it was done from the current config, but you can't be sure.

+   bool "Kernel .config support"
+   ---help---
+     This option enables the complete Linux kernel ".config" file 
+     contents, information on compiler used to build the kernel, 
+     kernel running when this kernel was built and kernel version 
+     from Makefile to be saved in kernel. It provides documentation 
+     of which kernel options are used in a running kernel or in an 
+     on-disk kernel.  This information can be extracted from the kernel 
+     image file with the script scripts/extract-ikconfig and used as 
+     input to rebuild the current kernel or to build another kernel. 
+     It can also be extracted from a running kernel by reading 
+     /proc/ikconfig/config and /proc/ikconfig/built_with, if enabled. 
+     /proc/ikconfig/config will list the configuration that was used 
+     to build the kernel and /proc/ikconfig/built_with will list 
+     information on the compiler and host machine that was used to 
+     build the kernel.
 

Couldn't ask for more than that.

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