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makefiles writing to $@ should first write to $@.new - Mailing list pgsql-hackers

From Justin Pryzby
Subject makefiles writing to $@ should first write to $@.new
Date
Msg-id 20220124032305.GR23027@telsasoft.com
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Responses Re: makefiles writing to $@ should first write to $@.new
Re: makefiles writing to $@ should first write to $@.new
List pgsql-hackers
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There are many Makefile rules like

foo: bar
    ./tool $< > $@

If the rule is interrupted (due to ^C or ENOSPC), foo can be 0 bytes or
partially written, but won't be rebuilt until someone runs distclean or debugs
it and removes the individual file, as I did for errcodes.h.

It'd be better if these did

./tool $< > $@.new
mv $@.new $@

-- 
Justin

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