use of bsd.sys.mk

[Alan Barrett <apb%cequrux.com@localhost>]

On Fri, 10 Jan 2014, Christos Zoulas wrote:
> Module Name:    src
> Committed By:   christos
> Date:           Fri Jan 10 15:50:34 UTC 2014
>
> Modified Files:
>         src/external/mit/xorg/server/xorg-server/hw/xfree86/common: Makefile
>
> Log Message:
> don't include bsd.sys.mk

bsd.sys.mk is needed to get the value of HOST_SH, which is used in a
"!=" line.

At present, Makefiles that use assorted HOST_* tools in "!=" 
lines usually include bsd.sys.mk to get the variable definitions 
sufficiently early.  If you don't want them to do that, then we 
need to find a way that works.  Perhaps a lot of the variable 
definitions from bsd.sys.mk can be moved to bsd.own.mk, or a file 
that's included by bsd.own.mk.

Also, if you think that Makefiles should not include bsd.sys.mk, 
then please edit share/mk/bsd.README to document how things should 
be done.

--apb (Alan Barrett)