ERROR: Kernel configuration is invalid.
         include/linux/autoconf.h or include/config/auto.conf are missing.
         Run 'make oldconfig && make prepare' on kernel src to fix it.

2.
  ERROR: Kernel configuration is invalid.
         include/linux/autoconf.h or include/config/auto.conf are missing.
         Run 'make oldconfig && make prepare' on kernel src to fix it.

6.
  ERROR: Kernel configuration is invalid.
         include/linux/autoconf.h or include/config/auto.conf are missing.
         Run 'make oldconfig && make prepare' on kernel src to fix it.

23
  ERROR: Kernel configuration is invalid.
         include/linux/autoconf.h or include/config/auto.conf are missing.
         Run 'make oldconfig && make prepare' on kernel src to fix it.
-gentoo-r3
/usr/portage/eclass/linux-info.eclass: line 200: [: too many arguments
>>> Unpacking source...
>>> Unpacking klibc-1.5.tar.bz2 to /var/tmp/portage/dev-libs/klibc-1.5/work
 * CTARGET = i686-pc-linux-gnu

 * Your kernel sources are not configured for your chosen arch!
 * (KERNEL_ARCH="", ARCH="i386")
 * 
 * ERROR: dev-libs/klibc-1.5 failed.
 * Call stack:
 *          ebuild.sh, line 1701:  Called dyn_unpack
 *          ebuild.sh, line  817:  Called qa_call 'src_unpack'
 *          ebuild.sh, line   44:  Called src_unpack
 *   klibc-1.5.ebuild, line   82:  Called die
 * The specific snippet of code:
 *              die "Your kernel sources are not configured for your chosen arch!"
 *  The die message:
 *   Your kernel sources are not configured for your chosen arch!
 * 
 * If you need support, post the topmost build error, and the call stack if relevant.
 * A* Messages for package dev-libs/klibc-1.5:

 * Your kernel sources are not configured for your chosen arch!
 * (KERNEL_ARCH="", ARCH="i386")
 * 
 * ERROR: dev-libs/klibc-1.5 failed.
 * Call stack:
 *          ebuild.sh, line 1701:  Called dyn_unpack
 *          ebuild.sh, line  817:  Called qa_call 'src_unpack'
 *          ebuild.sh, line   44:  Called src_unpack
 *   klibc-1.5.ebuild, line   82:  Called die
 * The specific snippet of code:
 *              die "Your kernel sources are not configured for your chosen arch!"
 *  The die message:
 *   Your kernel sources are not configured for your chosen arch!
 * 
 * If you need support, post the topmost build error, and the call stack if relevant.
 * A complete build log is located at '/var/tmp/portage/dev-libs/klibc-1.5/temp/build.log'. complete build log is located at '/var/tmp/portage/dev-libs/klibc-1.5/temp/build.log'.