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	It is generally the common prefix for all the MACHINE_ARCH that			It is generally the common prefix for all the MACHINE_ARCH that
	share the same implementation, though 'riscv' breaks this rule.			share the same implementation, though 'riscv' breaks this rule.
	For example,			For example,
	.Dv MACHINE_CPUARCH			.Dv MACHINE_CPUARCH
	is defined to be mips for all the flavors of mips that we support			is defined to be mips for all the flavors of mips that we support
	since we support them all with a shared set of sources.			since we support them all with a shared set of sources.
	While amd64 and i386 are closely related, MACHINE_CPUARCH is not x86			While amd64 and i386 are closely related, MACHINE_CPUARCH is not x86
	for them.			for them.
	The FreeBSD source base supports amd64 and i386 with two			The
				.Fx
				source base supports amd64 and i386 with two
	distinct source bases living in subdirectories named amd64 and i386			distinct source bases living in subdirectories named amd64 and i386
	(though behind the scenes there's some sharing that fits into this			(though behind the scenes there's some sharing that fits into this
	framework).			framework).
	.It Dv CPUTYPE			.It Dv CPUTYPE
	Sets the flavor of			Sets the flavor of
	.Dv MACHINE_ARCH			.Dv MACHINE_ARCH
	to build.			to build.
	It is used to optimize the build for a specific CPU / core that the			It is used to optimize the build for a specific CPU / core that the
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