[CMake] toolchain file - cross-compiling windows-amd64->windows-x86

[Joao Pedro Abreu De Souza]

So, only the Visual Studio generator use the Arch option? I try generate
ninja build, but cmake(3.15.3) and the answer was

```
$ cmake -B build -S . -G "Ninja" -A Win32
CMake Error at CMakeLists.txt:2 (project):
  Generator

    Ninja

  does not support platform specification, but platform

    Win32

  was specified.


CMake Error: CMAKE_C_COMPILER not set, after EnableLanguage
CMake Error: CMAKE_CXX_COMPILER not set, after EnableLanguage
-- Configuring incomplete, errors occurred!
See also
"C:/Users/jpabreu/Desktop/testCMAKE/build/CMakeFiles/CMakeOutput.log".
```

Em ter, 17 de set de 2019 às 14:00, Juan Sanchez <juan.e.sanchez at gmail.com>
escreveu:

> Hello,
>
> My impression that targeting 32 bit depends on what generator you are
> using.
>
> https://cmake.org/cmake/help/git-stage/generator/Visual%20Studio%2015%202017.html
>
> It looks like cmake now has:
>
>    - cmake -G "Visual Studio 15 2017" -A Win32
>    - cmake -G "Visual Studio 15 2017" -A x64
>
> It used to be that the default target platform was Win32, and  you had to
> specify Win64 in the generator string to target a 64 bit build.  For
> example with Visual Studio 2015
>
>
> https://cmake.org/cmake/help/git-stage/generator/Visual%20Studio%2014%202015.html
>
> For compatibility with CMake versions prior to 3.1, one may specify a
> target platform name optionally at the end of the generator name. This is
> supported only for:
> Visual Studio 14 2015 Win64Specify target platform x64.Visual Studio 14
> 2015 ARMSpecify target platform ARM.
>
>
> Regards,
>
> Juan
>
>
> On Tue, Sep 17, 2019 at 7:18 AM Joao Pedro Abreu De Souza <
> jp_abreu at id.uff.br> wrote:
>
>> cl from visual studio 2017.
>>
>> Em ter, 17 de set de 2019 03:26, Stéphane Ancelot <
>> sancelot at numalliance.com> escreveu:
>>
>>> Hi,
>>>
>>> That first depends on which compiler you will use ?
>>>
>>> Regards,
>>>
>>> S.Ancelot
>>> Le 16/09/2019 à 22:32, Joao Pedro Abreu De Souza a écrit :
>>>
>>> Hi guys. I am trying to generate,using cmake, a executable with target
>>> Windows 32 bits using Windows 64 bits, but cannot find a standard toolchain
>>> file (I find to Linux, to Android, but can't find to Windows 32 bits) to
>>> build. Do you know some repository of toolchain files that has Windows 32
>>> bits from Windows 64 bits? Or maybe someone has a standard toolchain file
>>> to this type of thing.
>>>
>>> Thanks in advance.
>>>
>>> --
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