[cmake-developers] [CMake] Xcode and Cmake ReRun

[Johan Björk]

Hi David,

Please see attached patch. It seems to work with the project I happened to
have open; it's not tested more then that. You know the xcode generator a
whole lot better then me; does it seem reasonable?

Thanks
/Johan


On Tue, Jul 26, 2011 at 7:31 PM, David Cole <david.cole at kitware.com> wrote:

> Sounds like we need a ZERO_CHECK target like we have in the Visual
> Studio generators to enable parallel building in Xcode.
>
> There are currently some problems with the existing CMake re-run
> commands on VS builds when CMake inputs change during the course of
> the build. When that happens, (not something that us CMake devs
> expect, by the way, but not forbidden/prevented either...), CMake
> re-runs during the middle of the build, and we get all the bug reports
> about Visual Studio reload stuff not working (here, and related
> issues: http://public.kitware.com/Bug/view.php?id=11258 and
> particularly, this note:
> http://public.kitware.com/Bug/view.php?id=11440#c26905 )
>
> I don't think there's a specific reason for it... Perhaps it was
> simply easiest that way, or we didn't have a way to depend on custom
> targets at the time, or it was modeled after the VS re-run rules...
> (Or maybe Bill or Brad will chime in if I'm incorrect here...)
>
>
> HTH,
> David
>
>
> On Mon, Jul 25, 2011 at 5:37 PM, Johan Björk <phb at spotify.com> wrote:
> > Hi guys,
> >
> > I noticed that each XCode target has an associated CMake ReRun script
> > phase. Is there a specific reason for this (in difference to having
> > one target that all others depend on that does the ReRun check?)
> >
> > It causes a fair few issues, it fails when you are parallelcompiling
> > targets (It'll start <number of cpus> copies of cmake at the same
> > time), secondly it adds quite some time to the build if you have many
> > targets
> > /Johan
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