make (possible FAQ)

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#3729

From: Ian Zimmerman
Date: Sat, 24 Jan 2004 18:18

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So, how does one handle, in plain make, the situation where multiple
outputs depend on the same input, and the same command updates both
outputs?

The GNU make manual says if both outputs are listed as targets of the
same rule, the command will be run twice, once for each target --- which
isn't what I want.  I remember the real situation was more complex with GNU
make, it tried to optimize this, but it was undocumented and impossible
to figure out.

Also, presumably the documented behavior is what other make implementations
do, and I'd like to stay compatible with them.

-- 
Nothing can be explained to a stone.
Or to a stoned person, either.

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From: Ian Zimmerman <bayard@newsguy.com>
Newsgroups: comp.unix.programmer,gnu.utils.help
Subject: make (possible FAQ)
Date: 24 Jan 2004 10:18:57 -0800
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