D18740.id52535.diff
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	Index: UPDATING
	===================================================================
	--- UPDATING
	+++ UPDATING
	@@ -1901,12 +1901,13 @@
	can be deleted by "make delete-old-libs", but you have to make
	sure that no program is using those libraries anymore.

	- [8] In order to have a kernel that can run the 4.x binaries needed to
	- do an installworld, you must include the COMPAT_FREEBSD4 option in
	- your kernel. Failure to do so may leave you with a system that is
	- hard to boot to recover. A similar kernel option COMPAT_FREEBSD5 is
	- required to run the 5.x binaries on more recent kernels. And so on
	- for COMPAT_FREEBSD6 and COMPAT_FREEBSD7.
	+ [8] The new kernel must be able to run existing binaries used by
	+ an installworld. When upgrading across major versions, the new
	+ kernel's configuration must include the correct COMPAT_FREEBSD<n>
	+ option for existing binaries (e.g. COMPAT_FREEBSD11 to run 11.x
	+ binaries). Failure to do so may leave you with a system that is
	+ hard to boot to recover. A GENERIC kernel will include suitable
	+ compatibility options to run binaries from older branches.

	Make sure that you merge any new devices from GENERIC since the
	last time you updated your kernel config file.