New command to build C (and C++, hopefully) libraries needed by extensions

in the current distribution: motivated by PIL's libImaging.

Lib/distutils/command/build_clib.py

+"""distutils.command.build_lib
+
+Implements the Distutils 'build_lib' command, to build a C/C++ library
+that is included in the module distribution and needed by an extension
+module."""
+
+# created (an empty husk) 1999/12/18, Greg Ward
+# fleshed out 2000/02/03-04
+
+__rcsid__ = "$Id$"
+
+
+# XXX this module has *lots* of code ripped-off quite transparently from
+# build_ext.py -- not surprisingly really, as the work required to build
+# a static library from a collection of C source files is not really all
+# that different from what's required to build a shared object file from
+# a collection of C source files.  Nevertheless, I haven't done the
+# necessary refactoring to account for the overlap in code between the
+# two modules, mainly because a number of subtle details changed in the
+# cut 'n paste.  Sigh.
+
+import os, string
+from types import *
+from distutils.core import Command
+from distutils.errors import *
+from distutils.ccompiler import new_compiler
+
+
+class BuildLib (Command):
+
+    options = []
+
+    def set_default_options (self):
+        # List of libraries to build
+        self.libraries = None
+
+        # Compilation options for all libraries
+        self.include_dirs = None
+        self.define = None
+        self.undef = None
+
+    # set_default_options()
+
+    def set_final_options (self):
+        self.libraries = self.distribution.libraries
+        if self.include_dirs is None:
+            self.include_dirs = self.distribution.include_dirs or []
+        if type (self.include_dirs) is StringType:
+            self.include_dirs = string.split (self.include_dirs,
+                                              os.pathsep)
+
+        # XXX same as for build_ext -- what about 'self.define' and
+        # 'self.undef' ?
+
+    # set_final_options()
+
+
+    def run (self):
+
+        if not self.libraries:
+            return
+        self.check_library_list (self.libraries)
+
+        # Yech -- this is cut 'n pasted from build_ext.py!
+        self.compiler = new_compiler (plat=os.environ.get ('PLAT'),
+                                      verbose=self.verbose,
+                                      dry_run=self.dry_run,
+                                      force=self.force)
+        if self.include_dirs is not None:
+            self.compiler.set_include_dirs (self.include_dirs)
+        if self.define is not None:
+            # 'define' option is a list of (name,value) tuples
+            for (name,value) in self.define:
+                self.compiler.define_macro (name, value)
+        if self.undef is not None:
+            for macro in self.undef:
+                self.compiler.undefine_macro (macro)
+
+        self.build_libraries (self.libraries)
+
+    # run()
+
+
+    def check_library_list (self, libraries):
+        """Ensure that the list of libraries (presumably provided as a
+           command option 'libraries') is valid, i.e. it is a list of
+           2-tuples, where the tuples are (library_name, build_info_dict).
+           Raise DistutilsValueError if the structure is invalid anywhere;
+           just returns otherwise."""
+
+        # Yechh, blecch, ackk: this is ripped straight out of build_ext.py,
+        # with only names changed to protect the innocent!
+
+        if type (libraries) is not ListType:
+            raise DistutilsValueError, \
+                  "'libraries' option must be a list of tuples"
+
+        for lib in libraries:
+            if type (lib) is not TupleType and len (lib) != 2:
+                raise DistutilsValueError, \
+                      "each element of 'libraries' must a 2-tuple"
+
+            if type (lib[0]) is not StringType:
+                raise DistutilsValueError, \
+                      "first element of each tuple in 'libraries' " + \
+                      "must be a string (the library name)"
+            if type (lib[1]) is not DictionaryType:
+                raise DistutilsValueError, \
+                      "second element of each tuple in 'libraries' " + \
+                      "must be a dictionary (build info)"
+        # for lib
+
+    # check_library_list ()
+
+
+    def build_libraries (self, libraries):
+
+        compiler = self.compiler
+
+        for (lib_name, build_info) in libraries:
+            sources = build_info.get ('sources')
+            if sources is None or type (sources) not in (ListType, TupleType):
+                raise DistutilsValueError, \
+                      ("in 'libraries' option (library '%s'), " +
+                       "'sources' must be present and must be " +
+                       "a list of source filenames") % lib_name
+            sources = list (sources)
+
+            self.announce ("building '%s' library" % lib_name)
+
+            # Extract the directory the library is intended to go in --
+            # note translation from "universal" slash-separated form to
+            # current platform's pathname convention (so we can use the
+            # string for actual filesystem use).
+            path = tuple (string.split (lib_name, '/')[:-1])
+            if path:
+                lib_dir = apply (os.path.join, path)
+            else:
+                lib_dir = ''
+
+            # First, compile the source code to object files in the library
+            # directory.  (This should probably change to putting object
+            # files in a temporary build directory.)
+            macros = build_info.get ('macros')
+            include_dirs = build_info.get ('include_dirs')
+            objects = self.compiler.compile (sources,
+                                             macros=macros,
+                                             include_dirs=include_dirs,
+                                             output_dir=lib_dir)
+
+            # Now "link" the object files together into a static library.
+            # (On Unix at least, this isn't really linking -- it just
+            # builds an archive.  Whatever.)
+            self.compiler.link_static_lib (objects, lib_name)
+
+        # for libraries
+
+    # build_libraries ()
+                
+
+# class BuildLib

Lib/distutils/command/build_lib.py

+"""distutils.command.build_lib
+
+Implements the Distutils 'build_lib' command, to build a C/C++ library
+that is included in the module distribution and needed by an extension
+module."""
+
+# created (an empty husk) 1999/12/18, Greg Ward
+# fleshed out 2000/02/03-04
+
+__rcsid__ = "$Id$"
+
+
+# XXX this module has *lots* of code ripped-off quite transparently from
+# build_ext.py -- not surprisingly really, as the work required to build
+# a static library from a collection of C source files is not really all
+# that different from what's required to build a shared object file from
+# a collection of C source files.  Nevertheless, I haven't done the
+# necessary refactoring to account for the overlap in code between the
+# two modules, mainly because a number of subtle details changed in the
+# cut 'n paste.  Sigh.
+
+import os, string
+from types import *
+from distutils.core import Command
+from distutils.errors import *
+from distutils.ccompiler import new_compiler
+
+
+class BuildLib (Command):
+
+    options = []
+
+    def set_default_options (self):
+        # List of libraries to build
+        self.libraries = None
+
+        # Compilation options for all libraries
+        self.include_dirs = None
+        self.define = None
+        self.undef = None
+
+    # set_default_options()
+
+    def set_final_options (self):
+        self.libraries = self.distribution.libraries
+        if self.include_dirs is None:
+            self.include_dirs = self.distribution.include_dirs or []
+        if type (self.include_dirs) is StringType:
+            self.include_dirs = string.split (self.include_dirs,
+                                              os.pathsep)
+
+        # XXX same as for build_ext -- what about 'self.define' and
+        # 'self.undef' ?
+
+    # set_final_options()
+
+
+    def run (self):
+
+        if not self.libraries:
+            return
+        self.check_library_list (self.libraries)
+
+        # Yech -- this is cut 'n pasted from build_ext.py!
+        self.compiler = new_compiler (plat=os.environ.get ('PLAT'),
+                                      verbose=self.verbose,
+                                      dry_run=self.dry_run,
+                                      force=self.force)
+        if self.include_dirs is not None:
+            self.compiler.set_include_dirs (self.include_dirs)
+        if self.define is not None:
+            # 'define' option is a list of (name,value) tuples
+            for (name,value) in self.define:
+                self.compiler.define_macro (name, value)
+        if self.undef is not None:
+            for macro in self.undef:
+                self.compiler.undefine_macro (macro)
+
+        self.build_libraries (self.libraries)
+
+    # run()
+
+
+    def check_library_list (self, libraries):
+        """Ensure that the list of libraries (presumably provided as a
+           command option 'libraries') is valid, i.e. it is a list of
+           2-tuples, where the tuples are (library_name, build_info_dict).
+           Raise DistutilsValueError if the structure is invalid anywhere;
+           just returns otherwise."""
+
+        # Yechh, blecch, ackk: this is ripped straight out of build_ext.py,
+        # with only names changed to protect the innocent!
+
+        if type (libraries) is not ListType:
+            raise DistutilsValueError, \
+                  "'libraries' option must be a list of tuples"
+
+        for lib in libraries:
+            if type (lib) is not TupleType and len (lib) != 2:
+                raise DistutilsValueError, \
+                      "each element of 'libraries' must a 2-tuple"
+
+            if type (lib[0]) is not StringType:
+                raise DistutilsValueError, \
+                      "first element of each tuple in 'libraries' " + \
+                      "must be a string (the library name)"
+            if type (lib[1]) is not DictionaryType:
+                raise DistutilsValueError, \
+                      "second element of each tuple in 'libraries' " + \
+                      "must be a dictionary (build info)"
+        # for lib
+
+    # check_library_list ()
+
+
+    def build_libraries (self, libraries):
+
+        compiler = self.compiler
+
+        for (lib_name, build_info) in libraries:
+            sources = build_info.get ('sources')
+            if sources is None or type (sources) not in (ListType, TupleType):
+                raise DistutilsValueError, \
+                      ("in 'libraries' option (library '%s'), " +
+                       "'sources' must be present and must be " +
+                       "a list of source filenames") % lib_name
+            sources = list (sources)
+
+            self.announce ("building '%s' library" % lib_name)
+
+            # Extract the directory the library is intended to go in --
+            # note translation from "universal" slash-separated form to
+            # current platform's pathname convention (so we can use the
+            # string for actual filesystem use).
+            path = tuple (string.split (lib_name, '/')[:-1])
+            if path:
+                lib_dir = apply (os.path.join, path)
+            else:
+                lib_dir = ''
+
+            # First, compile the source code to object files in the library
+            # directory.  (This should probably change to putting object
+            # files in a temporary build directory.)
+            macros = build_info.get ('macros')
+            include_dirs = build_info.get ('include_dirs')
+            objects = self.compiler.compile (sources,
+                                             macros=macros,
+                                             include_dirs=include_dirs,
+                                             output_dir=lib_dir)
+
+            # Now "link" the object files together into a static library.
+            # (On Unix at least, this isn't really linking -- it just
+            # builds an archive.  Whatever.)
+            self.compiler.link_static_lib (objects, lib_name)
+
+        # for libraries
+
+    # build_libraries ()
+                
+
+# class BuildLib