[U-Boot-Users] [PATCH] Use `ln -sf` rather than `rm -f && ln -s`

Wolfgang Denk wd at denx.de
Mon Jan 28 21:56:03 CET 2008


In message <200801280638.59012.vapier at gentoo.org> you wrote:
> odd ... git-send-email ate the explanatory text ...
> ---
> The -f option to `ln` should give the same behavior as the -f option to the
> `rm` command.  It is better to do this in one shot so as to avoid race
> conditions when building in parallel.  I build on a quad G5 and without this
> change, it isn't uncommon for the build to fail when using -j8 due to this
> small window where the files don't actually exist.

Note that "ln -s -f" will come down to two separate system calls as
well:

	...
	unlink();
	symlink();
	...

So you don't avoid the race condition; you're just making it a little
less likely at the cost of reduced portability.


Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
Software suppliers are trying to make their  software  packages  more
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