[CMake] Default Generator to use

[Sarnath K - ERS, HCLTech]

Hello Eric,

We have a case where 2 teams are working on a common source tree.
One team is using "Visual Studio 9 2008" and the other "Visual Studio 10"
Our platform is Windows7 64-bit.

We have a "tool" in our project that gets added as an "External Project" to the main CMAKE project.
This tool needs to be compiled _only_ as a 32-bit windows executable.
I use a configure.bat to configure this external project and build.

This batch-file has to invoke CMAKE with either Visual Studio 9 2008" or "Visual Studio 10".
But I would like this batch file to use the latest Visual Studio installed in the system in 32-bit mode.
I am on Win64 Command Prompt.
The main project is generated using "NMake Makefiles".
How do I do this?

Thanks,
Best Regards,
Sarnath

-----Original Message-----
From: Eric Noulard [mailto:eric.noulard at gmail.com]
Sent: Tuesday, February 07, 2012 1:36 PM
To: Sarnath K - ERS, HCLTech
Cc: cmake at cmake.org
Subject: Re: [CMake] Default Generator to use

2012/2/7 Sarnath K - ERS, HCLTech <k_sarnath at hcl.com>:
> Hello Friends,
>
> How do I specify the default generator that CMAKE should use when invoked
> without the "-G" option?
>
> I am on Windows.
>
> I saw an old thread on this. But I am not sure if any support was added
> later on.
>
>
> Is there a REGISTRY entry in Windows that we can set to make so that CMAKE
> can check it?

When starting with an empty build tree (or more precisely with empty cache)
the logic of the "default generator" is implement in:

Source/cmake.cxx::int cmake::ActualConfigure()

There is some system dependent macro logic and in
the Windows case the code comment says
(if not in Borland or Cygwin or Mingw case):
// Try to find the newest VS installed on the computer and
// use that as a default if -G is not specified

So no, as far as I understand the code,
there is no registry entry that could possibly be set to force a
particular default.

I guess it shouldn't be that hard to implement but it is not there.
(I'm not willing to try myself because I'm not a Windows user/developer)

Nevertheless, may be you can explain us why you would like to setup a default?
Is it too painful to add the extra -G argument?

--
Erk
Membre de l'April - « promouvoir et défendre le logiciel libre » -
http://www.april.org

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