[cfe-dev] Why copy_if_different?

[Yuri Gribov]

On Fri, Apr 29, 2011 at 1:15 PM, Francois Pichet <pichet2000 at gmail.com> wrote:
> On Fri, Apr 29, 2011 at 5:09 AM, Yuri Gribov <tetra2005 at googlemail.com> wrote:
>> Hi all,
>>
>> What is the reason for custom build rules in Visual Studion using
>> 'cmake -E copy_if_different' instead of plain 'cmake -E copy'? If
>> target file is older than source but contents is the same the source
>> will not be copied and the timestamp of target will remain the same.
>> This means that VS will try to rebuild this file (and a dozen of
>> dependent projects) on every run (I observe this particular behavior
>> on my system).
>
> I too observed this behaviour with MSVC 2008 but not with MSVC 2010.
> That's one of the reason i switched from 2008 to 2010.
>

I really do not think that this behavior depends on particular version of VS.

-- 
Best regards,
Yuri