<hr /><i>anonymous claiming to be mgagnon added on 2011-05-31 02:31:49 UTC:</i><br />
I confirm, on version [3abab7e177] makefile tested and work with no problem on:

  - OpenBSD 4.9 using bsd make and gnu make

  - QNX 6.4.1 (which use gnu make)
 
So, it seems to be the way to go.