[cmake-developers] Determining version and arch for Visual Studio generators.

[Bill Hoffman]

On 4/10/2013 4:45 PM, Stephen Kelly wrote:
>> >I don't think it's unstable, but I do think the version and arch should be
>> >detected somehow.
>> >

I take it back.

It is not hard coded.  It is just matching qt win32-msvc2010, 
win32-msvc2012 with the correct CMake generator:


     win32-g++*:CMAKE_GENERATOR = -G \"MinGW Makefiles\"
41	            win32:equals(QT_ARCH, x86_64) {
42	                win32-msvc2010:CMAKE_GENERATOR = -G \"Visual Studio 
10 Win64\"
43	                win32-msvc2012:CMAKE_GENERATOR = -G \"Visual Studio 
11 Win64\"
44	            }
41		45	

What about VS 9, seems to be missing?

What are all the possible values of win32-??

>> >Would it be possible for cmake to run devenv to check the version and arch
>> >before setting the default generator? That would have anticipated and pre-
>> >solved the bug here.
> I suppose the arch problem occurred because Qt was built in 64bit mode, and
> that has nothing to do with devenv.
>
Yes, that is correct, you have to figure out if Qt is 64 first, and then 
configure CMake.
> I can put a variable in the Qt5Core config file containing the arch. Better
> yet, I can put it in a INTERFACE_TARGET_ARCH target property and have cmake
> ensure that all targets are compatible.
>
> Such a TARGET_ARCH should be a built-in property in CMake, and CMake should
> also check it for each target against the generator. That would at least
> give a sensible error message about what the problem is at cmake-time.
>
> This might also be generally useful for storing an arch triple on linux
> systems? Can 32 and 64 bit libs be mixed there?
>
I don't think they can be mixed anywhere.
> This isn't for 2.8.11 obviously.

Sure.

-Bill



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Bill Hoffman
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