Re: [PATCH] perf tools: Fix build error on read only source.

[Bernd Petrovitsch <bernd@sysprog.at>]

On Mit, 2010-08-18 at 16:09 -0300, Arnaldo Carvalho de Melo wrote:
> Em Wed, Aug 18, 2010 at 02:01:58PM -0300, Arnaldo Carvalho de Melo escreveu:
> > Em Wed, Aug 18, 2010 at 01:56:42PM -0300, Arnaldo Carvalho de Melo escreveu:
> > > Em Wed, Aug 18, 2010 at 04:27:45PM +0200, Peter Zijlstra escreveu:
> > > > On Wed, 2010-08-18 at 11:16 -0300, Arnaldo Carvalho de Melo wrote:
> > > > > rm -rf ~/build
> > > > > make O=~/build
> > > > > 
> > > > > and have everything work? Saving some keystrokes 8)
> > > > 
> > > > The turn side is that if you typo the output dir you'll probably not
> > > > ever find it again.. and you could have typed: rm -rf ~/build/* instead.

Well, usually interactive shells have a history. But since the other
Makefiles also expect existing destination top directory ...

> > > Not something I'll argue too much :)
> 
> Ok, here it is, stolen directly from the toplevel kernel Makefile, will push to

ACK, it's the same problem so the same solution is the best.

> Ingo today:
> 
> [acme@emilia linux-2.6-tip]$ rm -rf ~/git/build/perf
> [acme@emilia linux-2.6-tip]$ make -j9 O=~/git/build/perf -C tools/perf
> /bin/sh: line 0: cd: /home/acme/git/build/perf/: No such file or directory

ACK, that should make the "problem" pretty clear.

	Bernd
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