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From: Geoff Collyer <geoff@col...>
Subject: kernel mk
Date: Sat, 29 May 2004 16:35:02 -0700

You don't have to; I type

	mk			# build 9pc
	mk 'CONF=pccpu'		# build 9pccpu
	mk 'CONFLIST=pc pccpu' all # build both
	mk all			# build all kernels

The reason you can't just type

	mk 9pccpu

is that there would have to already be a mkfile target named `9pccpu',
so adding a new kernel configuration would require editing the kernel
mkfile.  The use of CONF and CONFLIST allows mk to construct the
necessary rules on the fly:

$p$CONF:	$CONF.c $OBJ $LIB
	$CC $CFLAGS '-DKERNDATE='`{date -n} $CONF.c
	$LD -o $target -T0x80100020 -l $OBJ $CONF.$O $LIB
	size $target