Author: Matti Picus <[email protected]>
Branch:
Changeset: r93184:7b43c9a3c3d2
Date: 2017-11-26 23:23 +0200
http://bitbucket.org/pypy/pypy/changeset/7b43c9a3c3d2/
Log: DOC: how to hack your win32 environment to build cffi modules
without setuptools
diff --git a/pypy/doc/windows.rst b/pypy/doc/windows.rst
--- a/pypy/doc/windows.rst
+++ b/pypy/doc/windows.rst
@@ -25,8 +25,10 @@
This compiler, while the standard one for Python 2.7, is deprecated. Microsoft
has
made it available as the `Microsoft Visual C++ Compiler for Python 2.7`_ (the
link
-was checked in Nov 2016). Note that the compiler suite will be installed in
-``C:\Users\<user name>\AppData\Local\Programs\Common\Microsoft\Visual C++ for
Python``.
+was checked in Nov 2016). Note that the compiler suite may be installed in
+``C:\Users\<user name>\AppData\Local\Programs\Common\Microsoft\Visual C++ for
Python``
+or in
+``C:\Program Files (x86)\Common Files\Microsoft\Visual C++ for Python``.
A current version of ``setuptools`` will be able to find it there. For
Windows 10, you must right-click the download, and under ``Properties`` ->
``Compatibility`` mark it as ``Run run this program in comatibility mode for``
@@ -41,7 +43,6 @@
-----------------------------------
We routinely test translation using v9, also known as Visual Studio 2008.
-Our buildbot is still using the Express Edition, not the compiler noted above.
Other configurations may work as well.
The translation scripts will set up the appropriate environment variables
@@ -81,6 +82,30 @@
.. _build instructions: http://pypy.org/download.html#building-from-source
+Setting Up Visual Studio for building SSL in Python3
+----------------------------------------------------
+
+On Python3, the ``ssl`` module is based on ``cffi``, and requires a build step
after
+translation. However ``distutils`` does not support the Micorosft-provided
Visual C
+compiler, and ``cffi`` depends on ``distutils`` to find the compiler. The
+traditional solution to this problem is to install the ``setuptools`` module
+via running ``-m ensurepip`` which installs ``pip`` and ``setuptools``. However
+``pip`` requires ``ssl``. So we have a chicken-and-egg problem: ``ssl``
depends on
+``cffi`` which depends on ``setuptools``, which depends on ``ensurepip``, which
+depends on ``ssl``.
+
+In order to solve this, the buildbot sets an environment varaible that helps
+``distutils`` find the compiler without ``setuptools``::
+
+ set VS90COMNTOOLS=C:\Program Files (x86)\Common Files\Microsoft\Visual
C++ for Python\9.0\VC\bin
+
+or whatever is appropriate for your machine. Note that this is not enough, you
+must also copy the ``vcvarsall.bat`` file fron the ``...\9.0`` directory to the
+``...\9.0\VC`` directory, and edit it, changing the lines that set
+``VCINSTALLDIR`` and ``WindowsSdkDir``::
+ set VCINSTALLDIR=%~dp0\
+ set WindowsSdkDir=%~dp0\..\WinSDK\
+
Preparing Windows for the large build
-------------------------------------
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