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

[Ian Jackson <iwj@xxxxxxxxxxxxxx>]

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.

Ian.