Re: [PATCH 1/2][4.15?] tools/x86: don't rebuild cpuid-autogen.h every time

[Jan Beulich <jbeulich@xxxxxxxx>]

On 08.03.2021 13:12, Ian Jackson wrote:
> Jan Beulich writes ("Re: [PATCH 1/2][4.15?] tools/x86: don't rebuild 
> cpuid-autogen.h every time"):
>> Possibly, but it may end up being more complex: We want to only
>> retain files of specific names from a single dir. I don't think
>> this is as straightforward to express in a find rune. Of course
>> I'll be fine whichever way the bug gets fixed, but I'm afraid I
>> don't feel convinced I want to put time into trying the alternative
>> you suggest. If otoh you wanted to try out yours and it turned out
>> equivalent or better, I wouldn't mind at all.
> 
> Untested, but I think something like this should DTRT
> 
>  find xen ! -type d ! -path 'xen/lib/x86/*-autogen.h' -print0 | xargs -0r rm 
> --
> 
> Since my background is GNU utilities, I checked the FreeBSD manpages
> for find, xargs and rm.  They support these options.
> 
> This will leave the entire directory structure but I think that is
> fine.  The xen-dir target uses mkdir -p and should there be any stale
> directories (eg due to switching branches or whatever) they wouldn't
> be a problem.

Right. Thinking of it though - all we do is setting up symlinks
plus produce this generated header. Couldn't we therefore have
find simply arrange for all symlinks to be found and deleted?

Jan