[CMake] Why does changing -G not change generators?

[David Cole]

It's just something you can't change without wiping the build tree
entirely. It should probably actually produce an error or warning of
some sort to avoid confusion such as this...

D


On Tue, Jul 14, 2015 at 11:01 AM, Paul Smith <paul at mad-scientist.net> wrote:
> We have a situation where people are sometimes wanting to switch between
> different generators: from Xcode to Unix Makefiles, or from Visual
> Studio 2010 to Visual Studio 2012, etc.
>
> If they have an already-configured workspace then run "cmake -G" with a
> different generator, it appears to be a no-op: no error is generated but
> no changes are made and the previous generator is still used.
>
> This doesn't seem right to me... shouldn't giving a new generator type
> on the command line change the output for the new generator?  I'm using
> CMake 3.1.0... maybe this has changed since?
>
> Cheers!
>
> --
>
> Powered by www.kitware.com
>
> Please keep messages on-topic and check the CMake FAQ at: http://www.cmake.org/Wiki/CMake_FAQ
>
> Kitware offers various services to support the CMake community. For more information on each offering, please visit:
>
> CMake Support: http://cmake.org/cmake/help/support.html
> CMake Consulting: http://cmake.org/cmake/help/consulting.html
> CMake Training Courses: http://cmake.org/cmake/help/training.html
>
> Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html
>
> Follow this link to subscribe/unsubscribe:
> http://public.kitware.com/mailman/listinfo/cmake