Provides the Extension class, a nicer way to describe C/C++ extensions than
the old (ext_name, build_info) tuple.
diff --git a/Lib/distutils/extension.py b/Lib/distutils/extension.py
new file mode 100644
index 0000000..9d2a6fa
--- /dev/null
+++ b/Lib/distutils/extension.py
@@ -0,0 +1,115 @@
+"""distutils.extension
+
+Provides the Extension class, used to describe C/C++ extension
+modules in setup scripts."""
+
+# created 2000/05/30, Greg Ward
+
+__revision__ = "$Id$"
+
+from types import *
+
+
+# This class is really only used by the "build_ext" command, so it might
+# make sense to put it in distutils.command.build_ext. However, that
+# module is already big enough, and I want to make this class a bit more
+# complex to simplify some common cases ("foo" module in "foo.c") and do
+# better error-checking ("foo.c" actually exists).
+#
+# Also, putting this in build_ext.py means every setup script would have to
+# import that large-ish module (indirectly, through distutils.core) in
+# order to do anything.
+
+class Extension:
+ """Just a collection of attributes that describes an extension
+ module and everything needed to build it (hopefully in a portable
+ way, but there are hooks that let you can be as unportable as you
+ need).
+
+ Instance attributes:
+ name : string
+ the full name of the extension, including any packages -- ie.
+ *not* a filename or pathname, but Python dotted name
+ sources : [string]
+ list of C/C++ source filenames, relative to the distribution
+ root (where the setup script lives), in Unix form
+ (slash-separated) for portability
+ include_dirs : [string]
+ list of directories to search for C/C++ header files (in Unix
+ form for portability)
+ define_macros : [(name : string, value : string|None)]
+ list of macros to define; each macro is defined using a 2-tuple,
+ where 'value' is either the string to define it to or None to
+ define it without a particular value (equivalent of "#define
+ FOO" in source or -DFOO on Unix C compiler command line)
+ undef_macros : [string]
+ list of macros to undefine explicitly
+ library_dirs : [string]
+ list of directories to search for C/C++ libraries at link time
+ libraries : [string]
+ list of library names (not filenames or paths) to link against
+ runtime_library_dirs : [string]
+ list of directories to search for C/C++ libraries at run time
+ (for shared extensions, this is when the extension is loaded)
+ extra_objects : [string]
+ list of extra files to link with (eg. object files not implied
+ by 'sources', static library that must be explicitly specified,
+ binary resource files, etc.)
+ extra_compile_args : [string]
+ any extra platform- and compiler-specific information to use
+ when compiling the source files in 'sources'. For platforms and
+ compilers where "command line" makes sense, this is typically a
+ list of command-line arguments, but for other platforms it could
+ be anything.
+ extra_link_args : [string]
+ any extra platform- and compiler-specific information to use
+ when linking object files together to create the extension (or
+ to create a new static Python interpreter). Similar
+ interpretation as for 'extra_compile_args'.
+ export_symbols : [string]
+ list of symbols to be exported from a shared extension. Not
+ used on all platforms, and not generally necessary for Python
+ extensions, which typically export exactly one symbol: "init" +
+ extension_name.
+ export_symbol_file : string
+ name of file that lists symbols to export; the format of this
+ file is platform- and compiler-specific. This is even more
+ gratuitous and unnecessary than 'export_symbols'; I'll be happy
+ when it goes away forever.
+ """
+
+ def __init__ (self, name, sources,
+ include_dirs=None,
+ define_macros=None,
+ undef_macros=None,
+ library_dirs=None,
+ libraries=None,
+ runtime_library_dirs=None,
+ extra_objects=None,
+ extra_compile_args=None,
+ extra_link_args=None,
+ export_symbols=None,
+ export_symbol_file=None,
+ ):
+
+ assert type(name) is StringType, "'name' must be a string"
+ assert (type(sources) is ListType and
+ len(sources) >= 1 and
+ map(type, sources) == [StringType]*len(sources)), \
+ "'sources' must be a non-empty list of strings"
+
+ self.name = name
+ self.sources = sources
+ self.include_dirs = include_dirs or []
+ self.define_macros = define_macros or []
+ self.undef_macros = undef_macros or []
+ self.library_dirs = library_dirs or []
+ self.libraries = libraries or []
+ self.runtime_library_dirs = runtime_library_dirs or []
+ self.extra_objects = extra_objects or []
+ self.extra_compile_args = extra_compile_args or []
+ self.extra_link_args = extra_link_args or []
+ self.export_symbols = export_symbols or []
+ self.export_symbol_file = export_symbol_file
+
+# class Extension