>>>+MAKE+= _SRC_TOP_=${_SRC_TOP_:Q}
>>
>>Also I'm not at all keen on appending to MAKE.
>>Use .MAKEFLAGS or 

>Doesn't work. MAKEFLAGS gets passed in, but doesn't get evaluated so it's

MAKEFLAGS is not .MAKEFLAGS.  
The MAKEFLAGS #define in the source is ".MAKEFLAGS" btw.
When you update .MAKEFLAGS it is processed as though it came 
from the command line.

>pointless. Check the source, only $MAKE gets re-evaluated on a new make.

Not so.

>>.MAKEOVERRIDES+= _SRC_TOP_
>>will do the trick.

>Didn't try that. $MAKE works and reading the source MAKEOVERRIDES doesn't
>get evaluated either.

Again, .MAKEOVERIDES is not the same as MAKEOVERRIDES.
.MAKEOVERRIDES is used to control how command line var assignments get
propagated to sub-makes.  I know - I implemented it :-)

Thanks
--sjg