[ python-Bugs-957198 ] C/C++ extensions w/ Python + Mingw (Windows)

[SourceForge.net]

Bugs item #957198, was opened at 2004-05-20 03:36
Message generated for change (Tracker Item Submitted) made by Item Submitter
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=105470&aid=957198&group_id=5470

Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: Connelly (connelly)
Assigned to: Nobody/Anonymous (nobody)
Summary: C/C++ extensions w/ Python + Mingw (Windows)

Initial Comment:

I am asking you to distribute libpython23.a with Python.

This is a library built by the Mingw compiler
(www.mingw.org).  When this file is present, it greatly
simplifies the process of installing a C/C++ extension.
 The below document explains how make this library, and
install a C/C++ extension with the Mingw compiler.

Currently, a library is provided for the proprietary
MSVC++ compiler (python23.lib), but not the open source
Mingw compiler.

Normally, one uses the following procedure to build and
install a C/C++
extension:

  python setup.py build --compiler=your_compiler
  python setup.py install

For Python 2.3.3 on Windows, with the Mingw (Minimalist
GNU) compiler,
the following steps must be taken:

1. Find your Mingw bin directory.  Copy gcc.exe to cc.exe.

2. Get PExports from either of:

     http://sebsauvage.net/python/pexports-0.42h.zip
    
http://starship.python.net/crew/kernr/mingw32/pexports-0.42h.zip

   Extract pexports.exe to your Mingw bin directory.

3. Find pythonxx.dll.  It should be in your main Python
directory.  Do
   the following:

     pexports python23.dll > python23.def
     dlltool --dllname python23.dll --def python23.def
--output-lib libpython23.a

4. Copy libpythonxx.a to \python\libs.

5. Patch distutils.  Locate
\python\lib\distutils\msvccompiler.py, open
   it, and find the following lines (around line 211):
   
        if len (self.__paths) == 0:
            raise DistutilsPlatformError,                   ("Python was built with version %s of
Visual Studio, "
                   "and extensions need to be built
with the same "
                   "version of the compiler, but it
isn't installed." % self.__version)

   Delete these.

6. Move back to the directory of your extension.  Do
the following:
 
     python setup.py build --compiler=mingw32
     python setup.py install


Ideally, only step 6 should be required to install an
extension.

I submitted the patch for step 5 to python.sourceforge.net.
Steps 2-4 can be avoided if the libpythonxx.a file is
distributed
  with Python.
Step 1 can probably be avoided with another patch.

This document is based on
http://sebsauvage.net/python/mingw.html,
which was written for Mingw + Python 2.2.

Thanks,
Connelly


----------------------------------------------------------------------

You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=105470&aid=957198&group_id=5470