Buildworld fails in 5.1

[M. Warner Losh]

In message: <3F1C18CB.6030201 at acm.org>
            Tim Kientzle <kientzle at acm.org> writes:
: Gordon Tetlow wrote:
: > On Mon, Jul 21, 2003 at 09:36:37AM -0700, Tim Kientzle wrote:
: >>Hmmm...  Is that what .ORDER is for?  To work around a
: >>parallel make that gratuitously rebuilds things?
: > 
: > Right it serializes build dependencies. The problem with crunchgen ...
: 
: I would argue "the problem with make"... ;-)  I think it's pretty
: clear that
: 
: a b c: foo
:      buildabc
: 
: does not require that 'buildabc' be run three times.  Make
: should be able to note that 'buildabc' was already spawned
: for 'a' and just add 'b' and 'c' to the wait list for
: that operation, rather than running additional copies.

That's not how make works.

a b c: foo
	buildabc

is the same as:

a: foo
	buildabc
b: foo
	buildabc
c: foo
	buildabc