[wxWidgets.git] / wxPython / distutils / extension.py

"""distutils.extension

Provides the Extension class, used to describe C/C++ extension
modules in setup scripts."""

__revision__ = "$Id$"

import os, string, sys
from types import *

try:
    import warnings
except ImportError:
    warnings = None

# 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 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 source filenames, relative to the distribution root
        (where the setup script lives), in Unix form (slash-separated)
        for portability.  Source files may be C, C++, SWIG (.i),
        platform-specific resource files, or whatever else is recognized
        by the "build_ext" command as source for a Python extension.
      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.
      depends : [string]
        list of files that the extension depends on
      language : string
        extension language (i.e. "c", "c++", "objc"). Will be detected
        from the source extensions if not provided.
    """

    # When adding arguments to this constructor, be sure to update
    # setup_keywords in core.py.
    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,
                  depends=None,
                  language=None,
                  **kw                      # To catch unknown keywords
                 ):
        assert type(name) is StringType, "'name' must be a string"
        assert (type(sources) is ListType and
                map(type, sources) == [StringType]*len(sources)), \
                "'sources' must be a 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.depends = depends or []
        self.language = language

        # If there are unknown keyword options, warn about them
        if len(kw):
            L = kw.keys() ; L.sort()
            L = map(repr, L)
            msg = "Unknown Extension options: " + string.join(L, ', ')
            if warnings is not None:
                warnings.warn(msg)
            else:
                sys.stderr.write(msg + '\n')
# class Extension


def read_setup_file (filename):
    from distutils.sysconfig import \
         parse_makefile, expand_makefile_vars, _variable_rx
    from distutils.text_file import TextFile
    from distutils.util import split_quoted

    # First pass over the file to gather "VAR = VALUE" assignments.
    vars = parse_makefile(filename)

    # Second pass to gobble up the real content: lines of the form
    #   <module> ... [<sourcefile> ...] [<cpparg> ...] [<library> ...]
    file = TextFile(filename,
                    strip_comments=1, skip_blanks=1, join_lines=1,
                    lstrip_ws=1, rstrip_ws=1)
    extensions = []

    while 1:
        line = file.readline()
        if line is None:                # eof
            break
        if _variable_rx.match(line):    # VAR=VALUE, handled in first pass
            continue

        if line[0] == line[-1] == "*":
            file.warn("'%s' lines not handled yet" % line)
            continue

        #print "original line: " + line
        line = expand_makefile_vars(line, vars)
        words = split_quoted(line)
        #print "expanded line: " + line

        # NB. this parses a slightly different syntax than the old
        # makesetup script: here, there must be exactly one extension per
        # line, and it must be the first word of the line.  I have no idea
        # why the old syntax supported multiple extensions per line, as
        # they all wind up being the same.

        module = words[0]
        ext = Extension(module, [])
        append_next_word = None

        for word in words[1:]:
            if append_next_word is not None:
                append_next_word.append(word)
                append_next_word = None
                continue

            suffix = os.path.splitext(word)[1]
            switch = word[0:2] ; value = word[2:]

            if suffix in (".c", ".cc", ".cpp", ".cxx", ".c++", ".m", ".mm"):
                # hmm, should we do something about C vs. C++ sources?
                # or leave it up to the CCompiler implementation to
                # worry about?
                ext.sources.append(word)
            elif switch == "-I":
                ext.include_dirs.append(value)
            elif switch == "-D":
                equals = string.find(value, "=")
                if equals == -1:        # bare "-DFOO" -- no value
                    ext.define_macros.append((value, None))
                else:                   # "-DFOO=blah"
                    ext.define_macros.append((value[0:equals],
                                              value[equals+2:]))
            elif switch == "-U":
                ext.undef_macros.append(value)
            elif switch == "-C":        # only here 'cause makesetup has it!
                ext.extra_compile_args.append(word)
            elif switch == "-l":
                ext.libraries.append(value)
            elif switch == "-L":
                ext.library_dirs.append(value)
            elif switch == "-R":
                ext.runtime_library_dirs.append(value)
            elif word == "-rpath":
                append_next_word = ext.runtime_library_dirs
            elif word == "-Xlinker":
                append_next_word = ext.extra_link_args
            elif word == "-Xcompiler":
                append_next_word = ext.extra_compile_args
            elif switch == "-u":
                ext.extra_link_args.append(word)
                if not value:
                    append_next_word = ext.extra_link_args
            elif suffix in (".a", ".so", ".sl", ".o", ".dylib"):
                # NB. a really faithful emulation of makesetup would
                # append a .o file to extra_objects only if it
                # had a slash in it; otherwise, it would s/.o/.c/
                # and append it to sources.  Hmmmm.
                ext.extra_objects.append(word)
            else:
                file.warn("unrecognized argument '%s'" % word)

        extensions.append(ext)

        #print "module:", module
        #print "source files:", source_files
        #print "cpp args:", cpp_args
        #print "lib args:", library_args

        #extensions[module] = { 'sources': source_files,
        #                       'cpp_args': cpp_args,
        #                       'lib_args': library_args }

    return extensions

# read_setup_file ()
Commit	Line	Data
1e4a197e RD	1	"""distutils.extension
	2
	3	Provides the Extension class, used to describe C/C++ extension
	4	modules in setup scripts."""
	5
	6	__revision__ = "$Id$"
	7
	8	import os, string, sys
	9	from types import *
	10
	11	try:
	12	import warnings
	13	except ImportError:
	14	warnings = None
	15
	16	# This class is really only used by the "build_ext" command, so it might
	17	# make sense to put it in distutils.command.build_ext. However, that
	18	# module is already big enough, and I want to make this class a bit more
	19	# complex to simplify some common cases ("foo" module in "foo.c") and do
	20	# better error-checking ("foo.c" actually exists).
	21	#
	22	# Also, putting this in build_ext.py means every setup script would have to
	23	# import that large-ish module (indirectly, through distutils.core) in
	24	# order to do anything.
	25
	26	class Extension:
	27	"""Just a collection of attributes that describes an extension
	28	module and everything needed to build it (hopefully in a portable
	29	way, but there are hooks that let you be as unportable as you need).
	30
	31	Instance attributes:
	32	name : string
	33	the full name of the extension, including any packages -- ie.
	34	not a filename or pathname, but Python dotted name
	35	sources : [string]
	36	list of source filenames, relative to the distribution root
	37	(where the setup script lives), in Unix form (slash-separated)
	38	for portability. Source files may be C, C++, SWIG (.i),
	39	platform-specific resource files, or whatever else is recognized
	40	by the "build_ext" command as source for a Python extension.
	41	include_dirs : [string]
	42	list of directories to search for C/C++ header files (in Unix
	43	form for portability)
	44	define_macros : [(name : string, value : string\|None)]
	45	list of macros to define; each macro is defined using a 2-tuple,
	46	where 'value' is either the string to define it to or None to
	47	define it without a particular value (equivalent of "#define
	48	FOO" in source or -DFOO on Unix C compiler command line)
	49	undef_macros : [string]
	50	list of macros to undefine explicitly
	51	library_dirs : [string]
	52	list of directories to search for C/C++ libraries at link time
	53	libraries : [string]
	54	list of library names (not filenames or paths) to link against
	55	runtime_library_dirs : [string]
	56	list of directories to search for C/C++ libraries at run time
	57	(for shared extensions, this is when the extension is loaded)
	58	extra_objects : [string]
	59	list of extra files to link with (eg. object files not implied
	60	by 'sources', static library that must be explicitly specified,
	61	binary resource files, etc.)
	62	extra_compile_args : [string]
	63	any extra platform- and compiler-specific information to use
	64	when compiling the source files in 'sources'. For platforms and
65	compilers where "command line" makes sense, this is typically a
66	list of command-line arguments, but for other platforms it could
67	be anything.
68	extra_link_args : [string]
69	any extra platform- and compiler-specific information to use
70	when linking object files together to create the extension (or
71	to create a new static Python interpreter). Similar
72	interpretation as for 'extra_compile_args'.
73	export_symbols : [string]
74	list of symbols to be exported from a shared extension. Not
75	used on all platforms, and not generally necessary for Python
76	extensions, which typically export exactly one symbol: "init" +
77	extension_name.
78	depends : [string]
79	list of files that the extension depends on
80	language : string
81	extension language (i.e. "c", "c++", "objc"). Will be detected
82	from the source extensions if not provided.
83	"""
84
85	# When adding arguments to this constructor, be sure to update
86	# setup_keywords in core.py.
87	def __init__ (self, name, sources,
88	include_dirs=None,
89	define_macros=None,
90	undef_macros=None,
91	library_dirs=None,
92	libraries=None,
93	runtime_library_dirs=None,
94	extra_objects=None,
95	extra_compile_args=None,
96	extra_link_args=None,
97	export_symbols=None,
98	depends=None,
99	language=None,
100	**kw # To catch unknown keywords
101	):
102	assert type(name) is StringType, "'name' must be a string"
103	assert (type(sources) is ListType and
104	map(type, sources) == [StringType]*len(sources)), \
105	"'sources' must be a list of strings"
106
107	self.name = name
108	self.sources = sources
109	self.include_dirs = include_dirs or []
110	self.define_macros = define_macros or []
111	self.undef_macros = undef_macros or []
112	self.library_dirs = library_dirs or []
113	self.libraries = libraries or []
114	self.runtime_library_dirs = runtime_library_dirs or []
115	self.extra_objects = extra_objects or []
116	self.extra_compile_args = extra_compile_args or []
117	self.extra_link_args = extra_link_args or []
118	self.export_symbols = export_symbols or []
119	self.depends = depends or []
120	self.language = language
121
122	# If there are unknown keyword options, warn about them
123	if len(kw):
124	L = kw.keys() ; L.sort()
125	L = map(repr, L)
126	msg = "Unknown Extension options: " + string.join(L, ', ')
127	if warnings is not None:
128	warnings.warn(msg)
129	else:
130	sys.stderr.write(msg + '\n')
131	# class Extension
132
133
134	def read_setup_file (filename):
135	from distutils.sysconfig import \
136	parse_makefile, expand_makefile_vars, _variable_rx
137	from distutils.text_file import TextFile
138	from distutils.util import split_quoted
139
140	# First pass over the file to gather "VAR = VALUE" assignments.
141	vars = parse_makefile(filename)
142
143	# Second pass to gobble up the real content: lines of the form
144	# <module> ... [<sourcefile> ...] [<cpparg> ...] [<library> ...]
145	file = TextFile(filename,
146	strip_comments=1, skip_blanks=1, join_lines=1,
147	lstrip_ws=1, rstrip_ws=1)
148	extensions = []
149
150	while 1:
151	line = file.readline()
152	if line is None: # eof
153	break
154	if _variable_rx.match(line): # VAR=VALUE, handled in first pass
155	continue
156
157	if line[0] == line[-1] == "*":
158	file.warn("'%s' lines not handled yet" % line)
159	continue
160
161	#print "original line: " + line
162	line = expand_makefile_vars(line, vars)
163	words = split_quoted(line)
164	#print "expanded line: " + line
165
166	# NB. this parses a slightly different syntax than the old
167	# makesetup script: here, there must be exactly one extension per
168	# line, and it must be the first word of the line. I have no idea
169	# why the old syntax supported multiple extensions per line, as
170	# they all wind up being the same.
171
172	module = words[0]
173	ext = Extension(module, [])
174	append_next_word = None
175
176	for word in words[1:]:
177	if append_next_word is not None:
178	append_next_word.append(word)
179	append_next_word = None
180	continue
181
182	suffix = os.path.splitext(word)[1]
183	switch = word[0:2] ; value = word[2:]
184
185	if suffix in (".c", ".cc", ".cpp", ".cxx", ".c++", ".m", ".mm"):
186	# hmm, should we do something about C vs. C++ sources?
187	# or leave it up to the CCompiler implementation to
188	# worry about?
189	ext.sources.append(word)
190	elif switch == "-I":
191	ext.include_dirs.append(value)
192	elif switch == "-D":
193	equals = string.find(value, "=")
194	if equals == -1: # bare "-DFOO" -- no value
195	ext.define_macros.append((value, None))
196	else: # "-DFOO=blah"
197	ext.define_macros.append((value[0:equals],
198	value[equals+2:]))
199	elif switch == "-U":
200	ext.undef_macros.append(value)
201	elif switch == "-C": # only here 'cause makesetup has it!
202	ext.extra_compile_args.append(word)
203	elif switch == "-l":
204	ext.libraries.append(value)
205	elif switch == "-L":
206	ext.library_dirs.append(value)
207	elif switch == "-R":
208	ext.runtime_library_dirs.append(value)
209	elif word == "-rpath":
210	append_next_word = ext.runtime_library_dirs
211	elif word == "-Xlinker":
212	append_next_word = ext.extra_link_args
213	elif word == "-Xcompiler":
214	append_next_word = ext.extra_compile_args
215	elif switch == "-u":
216	ext.extra_link_args.append(word)
217	if not value:
218	append_next_word = ext.extra_link_args
219	elif suffix in (".a", ".so", ".sl", ".o", ".dylib"):
220	# NB. a really faithful emulation of makesetup would
221	# append a .o file to extra_objects only if it
222	# had a slash in it; otherwise, it would s/.o/.c/
223	# and append it to sources. Hmmmm.
224	ext.extra_objects.append(word)
225	else:
226	file.warn("unrecognized argument '%s'" % word)
227
228	extensions.append(ext)
229
230	#print "module:", module
231	#print "source files:", source_files
232	#print "cpp args:", cpp_args
233	#print "lib args:", library_args
234
235	#extensions[module] = { 'sources': source_files,
236	# 'cpp_args': cpp_args,
237	# 'lib_args': library_args }
238
239	return extensions
240
241	# read_setup_file ()