I installed one slackware64-14.1, but the latest kernel can not boot. /sbin/init just exit with "kernel too old". It looks weird.

A rebuid without "--enable-kernel=3.2.29" fixes the problem for me. But I still did not get why it fails, here is the code in glibc:

if (__LINUX_KERNEL_VERSION > 0 && version < __LINUX_KERNEL_VERSION) \
/* Not sufficent. */ \
FATAL ("FATAL: kernel too old, lversion __LINUX_KERNEL_VERSION\n");

So it should not fail...

Thanks for any hints.

---------- Post added 04-19-14 at 10:58 AM ----------

BTW my mainline kernel version is 3.15.0-rc1+

Where did you get the "mainline kernel" that you are attempting to use?

I always build a kernel by myself and use latest mainline. It had been always works for me before.

Maybe before is deprecated

I don't think so, there might be some kernel changes caused the version number wrong.
Upgrade from 3.15.0-rc1+ to 3.15.0-rc2+ there's no such problem any more..