[CFT] WITH_META_MODE: Working incremental build [only on i386 and amd64]

[Simon J. Gerraty]

Mark Millard <markmi at dsl-only.net> wrote:
> > .if ${MACHINE_CPUARCH} == "i386" || ${MACHINE_CPUARCH} == "amd64"
> . . .
> > _filemon=       filemon
> . . .
> 

> Thus, for example, arm variants (32 bit and 64 bit) and powerpc
> variants (32bit and 64 bit) do not have WITH_META_MODE as an option as
> things are set up.

FWIW I'm not aware of any reason that filemon(4) wouldn't work on any
architecture.  I expect the above restriction is mostly just a
reflection of expected build hosts.