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authorGuido van Rossum <guido@python.org>1996-09-06 21:16:21 (GMT)
committerGuido van Rossum <guido@python.org>1996-09-06 21:16:21 (GMT)
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A directory with a working example of how to build an extension.
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+Example Python extension for Windows NT
+=======================================
+
+This directory contains everything you need to build a Python
+extension module using Microsoft VC++ 4.x ("Developer Studio"), except
+for the Python distribution. It has only been tested with version
+4.0, but should work with higher versions.
+
+The "example" subdirectory should be an immediate subdirectory of the
+Python source directory -- a direct sibling of Include and PC, in
+particular, which are referenced as "..\Include" and "..\PC".
+In other words, it should *not* be used "as is". Copy or move it up
+one level or you will regret it! (This is done to keep all the PC
+specific files inside the PC subdirectory of the distribution, where
+they belong.)
+
+It is also assumed that the build results of Python are in the
+directory ..\vc40. In particular, the python14.lib file is referred
+to as "..\vc40\python14.lib".
+
+In order to use the example project from Developer Studio, use the
+"File->Open Workspace..." dialog (*not* the "File->Open..." dialog!).
+Change the pattern to "*.mak" and select the file "example.mak". Now
+choose "File->Save All" and the othe project files will be created.
+
+In order to check that everything is set up right, try building:
+choose "Build->Build example.dll". This creates all intermediate and
+result files in a subdirectory which is called either Debug or Release
+depending on which configuration you have chosen (as distributed,
+Debug is selected as the default configuration).
+
+Once the build has succeeded, test the resulting DLL. In a DOS
+command window, chdir to that directory. You should now be able to
+repeat the following session "(C>" is the DOS prompt, ">>>" is the
+Python prompt):
+
+ C> ..\..\vc40\python.exe
+ >>> import example
+ >>> example.foo()
+ Hello, world
+ >>>
+
+
+Creating the project
+--------------------
+
+There are two ways to use this example to create a project for your
+own module. First, choose a name ("spam" is always a winner :-) and
+create a directory for it. Copy your C sources into it. Note that
+the module source file name does not necessarily have to match the
+module name, but the "init" function name should match the module name
+-- i.e. you can only import a module "spam" if its init function is
+called "initspam()", and it should call Py_InitModule with the string
+"spam" as its first argument. By convention, it lives in a file
+called "spam.c" or "spammodule.c". The output file should be called
+"spam.dll" or "spam.pyd" (the latter is supported to avoid confusion
+with a system library "spam.dll" to which your module could be a
+Python interface).
+
+Now your options are:
+
+1) Clone example.mak. Start by copying example\example.mak to
+spam\spam.mak. Do a global edit on spam.mak, replacing all
+occurrences of the string "example" by "spam", and all occurrences of
+"DEP_CPP_EXAMP" by something like "DEP_CPP_SPAM". You can now use
+this makefile to create a project file by opening it as a workspace
+(you have to change the pattern to *.mak first).
+
+2) Create a brand new project; instructions are below.
+
+In both cases, copy example\example.def to spam\spam.def, and edit
+spam\spam.def so its second line contains the string "initspam".
+If you created a new project yourself, add the file spam.def to the
+project now.
+
+You are now all set to build your extension, unless it requires other
+external libraries, include files, etc. See Python's Extending and
+Embedding manual for instructions on how to write an extension.
+
+
+Creating a brand new project
+----------------------------
+
+If you don't feel comfortable with editing Makefiles, you can create a
+brand new project from scratch easily.
+
+Use the "File->New..." dialog to create a new Project Workspace.
+Select Dynamic-Link Library, enter the name ("spam"), and make sure
+the "Location" is set to the spam directory you have created (which
+should be a direct subdirectory of the Python build tree). Select
+Win32 as the platform (in my version, this is the only choice). Click
+"Create".
+
+Now open the "Build->Settings..." dialog. (Impressive, isn't it? :-)
+You only need to change a few settings. Make sure you have both the
+Debug and the Release configuration selected when you make these
+changes. Select the "C/C++" tab. Choose the "Preprocessor" category
+in the popup menu at the top. Type the following text in the entry
+box labeled "Addditional include directories:"
+
+ ..\Include,..\PC
+
+You should now first create the file spam.def as instructed in the
+previous section.
+
+Now chose the "Insert->Files into Project..." dialog. Set the pattern
+to *.* and select both spam.c and spam.def and click OK. (Inserting
+them one by one is fine too.) Using the same dialog, choose the file
+..\vc40\python14.lib and insert it into the project.