[CMake] Correct way to build for 64 bit?

[Bill Hoffman]

Stephane Rouleau (Consultant) wrote:
> [snip]
> 2. For the windows cl, a try compile is done to figure out which cl you 
> are using.  For the IDE,
> there is a separate generator for the 64 bit tool because you have to 
> use a different tool.  So,
> you either run vcvars64.bat then cmake for nmake, or you pick the 64 bit 
> IDE build.
> [...]
>  
> I've just started playing with cmake, downloaded the source to go 
> along with the documentation, so I may be reading this wrong...
>  
> It looks like with the current incarnation you cannot generate a 
> single .vcproj with two platforms (one for Win32, one for x64), and so 
> we'd have to run cmake twice and specify different output directories 
> for the two solution files.  Am I reading this correctly?
>
That is correct, you have to run CMake twice, once for 32 bit and once 
for 64 bit, just use different output directories.  

-Bill