linux-kernel - Re: REGRESSION: x86 vDSO: remove vdso-syms.o

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Date:	Fri, 15 Feb 2008 14:45:57 +0100 (CET)
From:	Jan Engelhardt <jengelh@...putergmbh.de>
To:	Roland McGrath <roland@...hat.com>
cc:	Ingo Molnar <mingo@...e.hu>, Priit Laes <plaes@...es.org>,
	linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
	Sam Ravnborg <sam@...nborg.org>
Subject: Re: REGRESSION: x86 vDSO: remove vdso-syms.o


On Feb 11 2008 15:29, Roland McGrath wrote:
>Sam might want to experiment with something like:
>
>	stdout_target = $(1) > $(@D)/.tmp_$(@F) && mv -f $(@D)/.tmp_$(@F) $@
>
>	cmd_foo = $(call stdout_target,blah | sed s/foo/bar/)
>
>to clean up all the places that would benefit from robust treatment for
>output files vs interrupted/erring make runs.

In most cases however, issuing ctrl+c signals make and make will
remove the output file.

Problematic indeed, "temp" could be left when ctrl+c is hit:
foo: bar
	generate-something <bar >temp;
	add-up <temp >foo;

What could work, temp being removed on ^C:
temp: bar
	generate-something <bar >temp;
foo: temp
	add-up <temp >foo;
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