Building Python from the source as 64 bit

Question

I am assuming Python X.X (my case 3.8) has not yet been released and is therfore not compiled to download, and if I want to run a x64 bit version I need to compile it for myself.

I have Visual Studio Express installed and have tried to build Python from the source. So far I did this:

Downloaded the source from GitHub
run cpython\PCbuild\build.bat as suggested in the documentation (I see nothing saying how to build x64 bit)
Waited

When the build finishes I run python.exe and I get this:

Python 3.8.0a0 (heads/master:cac4fef886, Jun 16 2018, 12:39:58) [MSC v.1914 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>>

This Python is a x32 bit (due to v.1914 32 bit (Intel))

I looked in SpecialBuilds.txt and no luck there either.

How do I build Python as x64 bit?

build.bat -p x64. Run build.bat -h to list the options. The readme explains this. The devguide told you to read it. — Eryk Sun
– Eryk Sun, Commented Jul 6, 2018 at 20:17
@eryksun That was easier than I thought. How did I not find it? Could you please consider leaving an answer. — Xantium
– Xantium, Commented Jul 6, 2018 at 20:28
I'm glad I could help, but I think you should delete the question. This is a straight path from the devguide to the readme to the section on using build.bat to listing the options with build -h, which clearly shows how to target x64. If we have questions and answers for every straight path through a documented process, we'll drown in the noise of billions of questions. — Eryk Sun
– Eryk Sun, Commented Jul 6, 2018 at 20:36

Xantium · Accepted Answer · 2018-07-07 23:02:29Z

13

build.bat -p x64

Run build.bat -h to list the options.

The README explains this. The devguide told you to read it.

_{- Answer in comments given by eryksun}

answered Jul 7, 2018 at 23:02

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