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Re: improvements for parallel makes ?

From: Boris Kolpackov
Subject: Re: improvements for parallel makes ?
Date: Tue, 4 Apr 2006 16:29:55 +0000 (UTC)
User-agent: nn/6.6.5+RFC1522

Hi Alexey,

Alexey Neyman <address@hidden> writes:

> I already expressed that the "truly order-only prerequisites" (TOOP),
> introduced as a part of the Makefile syntax, will indeed solve the
> problem. But, the necessity to add these prerequisites to each and
> every rule (including implicit ones) will nearly render this
> extension unusable.

Could you remind me how is that so? E.g., the following rule with

foo: bar .WAIT baz

will be rewritten as

foo: bar baz
bar: % baz

I vaguely remember that it has something to do with prerequisites
of, say, bar and baz being build in parallel:

foo: bar baz
bar: % baz

bar: bar-1
baz: baz-1

Here, bar-1 and baz-1 can be built in parallel (is it not the
case with .WAIT, btw?). Is there some non-academic example where
this will cause problems?


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