Error while compiling a Cython file

Question

I want to compile my Cython file on Windows 7

python mySetup.py build_ext --inplace

but getting an error

running build_ext building 'sumrange_Cython' extension C:\Program Files (x86)\Microsoft Visual Studio\Shared\14.0\VC\bin\cl.exe /c /nologo /Ox /W3 /GL /DNDEBUG /MD -IC:\Users\Artem\AppData\Local\Programs\Python\Python36-32\include -IC:\Users\Artem\AppData\Local\Programs\Python\Python36-32\include /Tcsumrange_Cython.c /Fobuild\temp.win32-3.6\Release\sumrange_Cython.obj sumrange_Cython.c c:\users\Artem\appdata\local\programs\python\python36-32\include\pyconfig.h(59): fatal error C1083: Cannot open include file: 'io.h': No such file or directory error: command C:\Program Files (x86)\Microsoft Visual Studio\Shared\14.0\VC\bin\cl.exe' failed with exit status 2

It seems like problem is in pathes to compiler. I launched the utility located at "C:\Program Files (x86)\Microsoft Visual Studio\Shared\14.0\VC\"

vcvarsall x86

in order to set up the pathes, but it also fails with the error

Error in script usage. The correct usage is: vcvarsall [option] or vcvarsall [option] store or vcvarsall [option] [version number] or vcvarsall [option] store [version number] where [option] is: x86 | amd64 | arm | x86_amd64 | x86_arm | amd64_x86 | amd64_arm where [version number] is either the full Windows 10 SDK version number or "8.1" to use the windows 8.1 SDK : The store parameter sets environment variables to support store (rather than desktop) development. : For example: vcvarsall x86_amd64 vcvarsall x86_arm store vcvarsall x86_amd64 10.0.10240.0 vcvarsall x86_arm store 10.0.10240.0 vcvarsall x64 8.1 vcvarsall x64 store 8.1 : Please make sure either Visual Studio or C++ Build SKU is installed.

Others have already asked this question but the answer is still absent python pip on Windows - command 'cl.exe' failed

Another way to solve the problem may be is to define the path to another compiler instead of Visual C++ while calling python. But I don't know how to do it.

Answer 1

Update: Please check this blog post out for a excellent walkthrough: https://andysalerno.com/Compiling-Python https://github.com/andysalerno/old_site_content/blob/master/Compiling-Python.html

I'm not sure why but the Path seems not to be updated. This might be a visual studio 2017 preview feature.

cl.exe resides in C:\Program Files (x86)\Microsoft Visual Studio\Preview\Professional\VC\Tools\MSVC\14.10.25017\bin{host}{architecture}\

Try running your commands from the "Developer Command prompt for visual studio 2017 preview" as it knows about this path.

Edit: If you get an error saying "fatal error LNK1112: module machine type 'x64' conflicts with target machine type 'x86'" you need to check this out: https://msdn.microsoft.com/en-us/library/x4d2c09s.aspx?f=255&MSPPError=-2147217396 vcvarsall.bat recides here :C:\Program Files (x86)\Microsoft Visual Studio\Preview\Professional\VC\Auxiliary\Build