Re: [PATCH] Documentation/Makefile: remove cmd-list.made before redirecting to it.

Junio C Hamano [off-list ref] writes:

Although I understand that it would be a problem if you built as
root earlier, which would have left files unmodifyable by you, I
think this is getting out of hand.  The cmd-list.perl script itself,
for example, does "creat in $out+, if the contents have changed from
the last round then rename $out+ to $out" sequence in order to avoid
unnecessary rebuild of files that depend on the generated command
list.  If it is interrupted in the middle while running as root, and
then you try to do another build, I suspect "creat in $out+" part
would fail.

No, creat is only interested in the directory permissions.  It is
open(..., O_TRUNC) that causes the problem.  There are not many
programs that actually use that for their output files, but shell
output redirection is one of them, and some editors tend to do this as
well in order to easily preserve permissions.

There are no other shell output redirections to an undeleted file in
the Makefile.

-- 
David Kastrup