Changes by: Jason Hickey (jyh at cs.caltech.edu)
Date: 2004-12-08 16:24:38 -0800 (Wed, 08 Dec 2004)
Revision: 674
Log message:
Added :squash: dependencies, as requested in bug #153.
For example, consider the following rule:
a: :squash: b
touch $@
To build a, b *must* exist, but its contents are ignored.
That is, if b changes, it will not cause a to be updated.