Python code coverage for Lib/packaging/compiler/msvccompiler.py

#	count	content
1	n/a	"""CCompiler implementation for old Microsoft Visual Studio compilers.
2	n/a
3	n/a	For a compiler compatible with VS 2005 and 2008, use msvc9compiler.
4	n/a	"""
5	n/a
6	n/a	# Written by Perry Stoll
7	n/a	# hacked by Robin Becker and Thomas Heller to do a better job of
8	n/a	# finding DevStudio (through the registry)
9	n/a
10	n/a
11	n/a	import sys
12	n/a	import os
13	n/a
14	n/a	from packaging.errors import (PackagingExecError, PackagingPlatformError,
15	n/a	CompileError, LibError, LinkError)
16	n/a	from packaging.compiler.ccompiler import CCompiler
17	n/a	from packaging.compiler import gen_lib_options
18	n/a	from packaging import logger
19	n/a
20	n/a	_can_read_reg = False
21	n/a	try:
22	n/a	import winreg
23	n/a
24	n/a	_can_read_reg = True
25	n/a	hkey_mod = winreg
26	n/a
27	n/a	RegOpenKeyEx = winreg.OpenKeyEx
28	n/a	RegEnumKey = winreg.EnumKey
29	n/a	RegEnumValue = winreg.EnumValue
30	n/a	RegError = winreg.error
31	n/a
32	n/a	except ImportError:
33	n/a	try:
34	n/a	import win32api
35	n/a	import win32con
36	n/a	_can_read_reg = True
37	n/a	hkey_mod = win32con
38	n/a
39	n/a	RegOpenKeyEx = win32api.RegOpenKeyEx
40	n/a	RegEnumKey = win32api.RegEnumKey
41	n/a	RegEnumValue = win32api.RegEnumValue
42	n/a	RegError = win32api.error
43	n/a
44	n/a	except ImportError:
45	n/a	logger.warning(
46	n/a	"can't read registry to find the necessary compiler setting;\n"
47	n/a	"make sure that Python modules _winreg, win32api or win32con "
48	n/a	"are installed.")
49	n/a
50	n/a	if _can_read_reg:
51	n/a	HKEYS = (hkey_mod.HKEY_USERS,
52	n/a	hkey_mod.HKEY_CURRENT_USER,
53	n/a	hkey_mod.HKEY_LOCAL_MACHINE,
54	n/a	hkey_mod.HKEY_CLASSES_ROOT)
55	n/a
56	n/a
57	n/a	def read_keys(base, key):
58	n/a	"""Return list of registry keys."""
59	n/a
60	n/a	try:
61	n/a	handle = RegOpenKeyEx(base, key)
62	n/a	except RegError:
63	n/a	return None
64	n/a	L = []
65	n/a	i = 0
66	n/a	while True:
67	n/a	try:
68	n/a	k = RegEnumKey(handle, i)
69	n/a	except RegError:
70	n/a	break
71	n/a	L.append(k)
72	n/a	i = i + 1
73	n/a	return L
74	n/a
75	n/a
76	n/a	def read_values(base, key):
77	n/a	"""Return dict of registry keys and values.
78	n/a
79	n/a	All names are converted to lowercase.
80	n/a	"""
81	n/a	try:
82	n/a	handle = RegOpenKeyEx(base, key)
83	n/a	except RegError:
84	n/a	return None
85	n/a	d = {}
86	n/a	i = 0
87	n/a	while True:
88	n/a	try:
89	n/a	name, value, type = RegEnumValue(handle, i)
90	n/a	except RegError:
91	n/a	break
92	n/a	name = name.lower()
93	n/a	d[convert_mbcs(name)] = convert_mbcs(value)
94	n/a	i = i + 1
95	n/a	return d
96	n/a
97	n/a
98	n/a	def convert_mbcs(s):
99	n/a	enc = getattr(s, "encode", None)
100	n/a	if enc is not None:
101	n/a	try:
102	n/a	s = enc("mbcs")
103	n/a	except UnicodeError:
104	n/a	pass
105	n/a	return s
106	n/a
107	n/a
108	n/a	class MacroExpander:
109	n/a
110	n/a	def __init__(self, version):
111	n/a	self.macros = {}
112	n/a	self.load_macros(version)
113	n/a
114	n/a	def set_macro(self, macro, path, key):
115	n/a	for base in HKEYS:
116	n/a	d = read_values(base, path)
117	n/a	if d:
118	n/a	self.macros["$(%s)" % macro] = d[key]
119	n/a	break
120	n/a
121	n/a	def load_macros(self, version):
122	n/a	vsbase = r"Software\Microsoft\VisualStudio\%0.1f" % version
123	n/a	self.set_macro("VCInstallDir", vsbase + r"\Setup\VC", "productdir")
124	n/a	self.set_macro("VSInstallDir", vsbase + r"\Setup\VS", "productdir")
125	n/a	net = r"Software\Microsoft\.NETFramework"
126	n/a	self.set_macro("FrameworkDir", net, "installroot")
127	n/a	try:
128	n/a	if version > 7.0:
129	n/a	self.set_macro("FrameworkSDKDir", net, "sdkinstallrootv1.1")
130	n/a	else:
131	n/a	self.set_macro("FrameworkSDKDir", net, "sdkinstallroot")
132	n/a	except KeyError:
133	n/a	raise PackagingPlatformError(
134	n/a	"""Python was built with Visual Studio 2003; extensions must be built with
135	n/a	a compiler than can generate compatible binaries. Visual Studio 2003 was
136	n/a	not found on this system. If you have Cygwin installed, you can try
137	n/a	compiling with MingW32, by passing "-c mingw32" to pysetup.""")
138	n/a
139	n/a	p = r"Software\Microsoft\NET Framework Setup\Product"
140	n/a	for base in HKEYS:
141	n/a	try:
142	n/a	h = RegOpenKeyEx(base, p)
143	n/a	except RegError:
144	n/a	continue
145	n/a	key = RegEnumKey(h, 0)
146	n/a	d = read_values(base, r"%s\%s" % (p, key))
147	n/a	self.macros["$(FrameworkVersion)"] = d["version"]
148	n/a
149	n/a	def sub(self, s):
150	n/a	for k, v in self.macros.items():
151	n/a	s = s.replace(k, v)
152	n/a	return s
153	n/a
154	n/a
155	n/a	def get_build_version():
156	n/a	"""Return the version of MSVC that was used to build Python.
157	n/a
158	n/a	For Python 2.3 and up, the version number is included in
159	n/a	sys.version. For earlier versions, assume the compiler is MSVC 6.
160	n/a	"""
161	n/a
162	n/a	prefix = "MSC v."
163	n/a	i = sys.version.find(prefix)
164	n/a	if i == -1:
165	n/a	return 6
166	n/a	i = i + len(prefix)
167	n/a	s, rest = sys.version[i:].split(" ", 1)
168	n/a	majorVersion = int(s[:-2]) - 6
169	n/a	minorVersion = int(s[2:3]) / 10.0
170	n/a	# I don't think paths are affected by minor version in version 6
171	n/a	if majorVersion == 6:
172	n/a	minorVersion = 0
173	n/a	if majorVersion >= 6:
174	n/a	return majorVersion + minorVersion
175	n/a	# else we don't know what version of the compiler this is
176	n/a	return None
177	n/a
178	n/a
179	n/a	def get_build_architecture():
180	n/a	"""Return the processor architecture.
181	n/a
182	n/a	Possible results are "Intel", "Itanium", or "AMD64".
183	n/a	"""
184	n/a
185	n/a	prefix = " bit ("
186	n/a	i = sys.version.find(prefix)
187	n/a	if i == -1:
188	n/a	return "Intel"
189	n/a	j = sys.version.find(")", i)
190	n/a	return sys.version[i+len(prefix):j]
191	n/a
192	n/a
193	n/a	def normalize_and_reduce_paths(paths):
194	n/a	"""Return a list of normalized paths with duplicates removed.
195	n/a
196	n/a	The current order of paths is maintained.
197	n/a	"""
198	n/a	# Paths are normalized so things like: /a and /a/ aren't both preserved.
199	n/a	reduced_paths = []
200	n/a	for p in paths:
201	n/a	np = os.path.normpath(p)
202	n/a	# XXX(nnorwitz): O(n**2), if reduced_paths gets long perhaps use a set.
203	n/a	if np not in reduced_paths:
204	n/a	reduced_paths.append(np)
205	n/a	return reduced_paths
206	n/a
207	n/a
208	n/a	class MSVCCompiler(CCompiler):
209	n/a	"""Concrete class that implements an interface to Microsoft Visual C++,
210	n/a	as defined by the CCompiler abstract class."""
211	n/a
212	n/a	name = 'msvc'
213	n/a	description = "Microsoft Visual C++"
214	n/a
215	n/a	# Just set this so CCompiler's constructor doesn't barf. We currently
216	n/a	# don't use the 'set_executables()' bureaucracy provided by CCompiler,
217	n/a	# as it really isn't necessary for this sort of single-compiler class.
218	n/a	# Would be nice to have a consistent interface with UnixCCompiler,
219	n/a	# though, so it's worth thinking about.
220	n/a	executables = {}
221	n/a
222	n/a	# Private class data (need to distinguish C from C++ source for compiler)
223	n/a	_c_extensions = ['.c']
224	n/a	_cpp_extensions = ['.cc', '.cpp', '.cxx']
225	n/a	_rc_extensions = ['.rc']
226	n/a	_mc_extensions = ['.mc']
227	n/a
228	n/a	# Needed for the filename generation methods provided by the
229	n/a	# base class, CCompiler.
230	n/a	src_extensions = (_c_extensions + _cpp_extensions +
231	n/a	_rc_extensions + _mc_extensions)
232	n/a	res_extension = '.res'
233	n/a	obj_extension = '.obj'
234	n/a	static_lib_extension = '.lib'
235	n/a	shared_lib_extension = '.dll'
236	n/a	static_lib_format = shared_lib_format = '%s%s'
237	n/a	exe_extension = '.exe'
238	n/a
239	n/a	def __init__(self, dry_run=False, force=False):
240	n/a	super(MSVCCompiler, self).__init__(dry_run, force)
241	n/a	self.__version = get_build_version()
242	n/a	self.__arch = get_build_architecture()
243	n/a	if self.__arch == "Intel":
244	n/a	# x86
245	n/a	if self.__version >= 7:
246	n/a	self.__root = r"Software\Microsoft\VisualStudio"
247	n/a	self.__macros = MacroExpander(self.__version)
248	n/a	else:
249	n/a	self.__root = r"Software\Microsoft\Devstudio"
250	n/a	self.__product = "Visual Studio version %s" % self.__version
251	n/a	else:
252	n/a	# Win64. Assume this was built with the platform SDK
253	n/a	self.__product = "Microsoft SDK compiler %s" % (self.__version + 6)
254	n/a
255	n/a	self.initialized = False
256	n/a
257	n/a	def initialize(self):
258	n/a	self.__paths = []
259	n/a	if ("DISTUTILS_USE_SDK" in os.environ and "MSSdk" in os.environ and
260	n/a	self.find_exe("cl.exe")):
261	n/a	# Assume that the SDK set up everything alright; don't try to be
262	n/a	# smarter
263	n/a	self.cc = "cl.exe"
264	n/a	self.linker = "link.exe"
265	n/a	self.lib = "lib.exe"
266	n/a	self.rc = "rc.exe"
267	n/a	self.mc = "mc.exe"
268	n/a	else:
269	n/a	self.__paths = self.get_msvc_paths("path")
270	n/a
271	n/a	if len(self.__paths) == 0:
272	n/a	raise PackagingPlatformError("Python was built with %s "
273	n/a	"and extensions need to be built with the same "
274	n/a	"version of the compiler, but it isn't installed." %
275	n/a	self.__product)
276	n/a
277	n/a	self.cc = self.find_exe("cl.exe")
278	n/a	self.linker = self.find_exe("link.exe")
279	n/a	self.lib = self.find_exe("lib.exe")
280	n/a	self.rc = self.find_exe("rc.exe") # resource compiler
281	n/a	self.mc = self.find_exe("mc.exe") # message compiler
282	n/a	self.set_path_env_var('lib')
283	n/a	self.set_path_env_var('include')
284	n/a
285	n/a	# extend the MSVC path with the current path
286	n/a	try:
287	n/a	for p in os.environ['path'].split(';'):
288	n/a	self.__paths.append(p)
289	n/a	except KeyError:
290	n/a	pass
291	n/a	self.__paths = normalize_and_reduce_paths(self.__paths)
292	n/a	os.environ['path'] = ';'.join(self.__paths)
293	n/a
294	n/a	self.preprocess_options = None
295	n/a	if self.__arch == "Intel":
296	n/a	self.compile_options = ['/nologo', '/Ox', '/MD', '/W3', '/GX',
297	n/a	'/DNDEBUG']
298	n/a	self.compile_options_debug = ['/nologo', '/Od', '/MDd', '/W3', '/GX',
299	n/a	'/Z7', '/D_DEBUG']
300	n/a	else:
301	n/a	# Win64
302	n/a	self.compile_options = ['/nologo', '/Ox', '/MD', '/W3', '/GS-',
303	n/a	'/DNDEBUG']
304	n/a	self.compile_options_debug = ['/nologo', '/Od', '/MDd', '/W3', '/GS-',
305	n/a	'/Z7', '/D_DEBUG']
306	n/a
307	n/a	self.ldflags_shared = ['/DLL', '/nologo', '/INCREMENTAL:NO']
308	n/a	if self.__version >= 7:
309	n/a	self.ldflags_shared_debug = [
310	n/a	'/DLL', '/nologo', '/INCREMENTAL:no', '/DEBUG'
311	n/a	]
312	n/a	else:
313	n/a	self.ldflags_shared_debug = [
314	n/a	'/DLL', '/nologo', '/INCREMENTAL:no', '/pdb:None', '/DEBUG'
315	n/a	]
316	n/a	self.ldflags_static = [ '/nologo']
317	n/a
318	n/a	self.initialized = True
319	n/a
320	n/a	# -- Worker methods ------------------------------------------------
321	n/a
322	n/a	def object_filenames(self, source_filenames, strip_dir=False, output_dir=''):
323	n/a	# Copied from ccompiler.py, extended to return .res as 'object'-file
324	n/a	# for .rc input file
325	n/a	if output_dir is None:
326	n/a	output_dir = ''
327	n/a	obj_names = []
328	n/a	for src_name in source_filenames:
329	n/a	base, ext = os.path.splitext(src_name)
330	n/a	base = os.path.splitdrive(base)[1] # Chop off the drive
331	n/a	base = base[os.path.isabs(base):] # If abs, chop off leading /
332	n/a	if ext not in self.src_extensions:
333	n/a	# Better to raise an exception instead of silently continuing
334	n/a	# and later complain about sources and targets having
335	n/a	# different lengths
336	n/a	raise CompileError("Don't know how to compile %s" % src_name)
337	n/a	if strip_dir:
338	n/a	base = os.path.basename(base)
339	n/a	if ext in self._rc_extensions:
340	n/a	obj_names.append(os.path.join(output_dir,
341	n/a	base + self.res_extension))
342	n/a	elif ext in self._mc_extensions:
343	n/a	obj_names.append(os.path.join(output_dir,
344	n/a	base + self.res_extension))
345	n/a	else:
346	n/a	obj_names.append(os.path.join(output_dir,
347	n/a	base + self.obj_extension))
348	n/a	return obj_names
349	n/a
350	n/a	def compile(self, sources,
351	n/a	output_dir=None, macros=None, include_dirs=None, debug=False,
352	n/a	extra_preargs=None, extra_postargs=None, depends=None):
353	n/a
354	n/a	if not self.initialized:
355	n/a	self.initialize()
356	n/a	macros, objects, extra_postargs, pp_opts, build = \
357	n/a	self._setup_compile(output_dir, macros, include_dirs, sources,
358	n/a	depends, extra_postargs)
359	n/a
360	n/a	compile_opts = extra_preargs or []
361	n/a	compile_opts.append('/c')
362	n/a	if debug:
363	n/a	compile_opts.extend(self.compile_options_debug)
364	n/a	else:
365	n/a	compile_opts.extend(self.compile_options)
366	n/a
367	n/a	for obj in objects:
368	n/a	try:
369	n/a	src, ext = build[obj]
370	n/a	except KeyError:
371	n/a	continue
372	n/a	if debug:
373	n/a	# pass the full pathname to MSVC in debug mode,
374	n/a	# this allows the debugger to find the source file
375	n/a	# without asking the user to browse for it
376	n/a	src = os.path.abspath(src)
377	n/a
378	n/a	if ext in self._c_extensions:
379	n/a	input_opt = "/Tc" + src
380	n/a	elif ext in self._cpp_extensions:
381	n/a	input_opt = "/Tp" + src
382	n/a	elif ext in self._rc_extensions:
383	n/a	# compile .RC to .RES file
384	n/a	input_opt = src
385	n/a	output_opt = "/fo" + obj
386	n/a	try:
387	n/a	self.spawn([self.rc] + pp_opts +
388	n/a	[output_opt] + [input_opt])
389	n/a	except PackagingExecError as msg:
390	n/a	raise CompileError(msg)
391	n/a	continue
392	n/a	elif ext in self._mc_extensions:
393	n/a
394	n/a	# Compile .MC to .RC file to .RES file.
395	n/a	# * '-h dir' specifies the directory for the
396	n/a	# generated include file
397	n/a	# * '-r dir' specifies the target directory of the
398	n/a	# generated RC file and the binary message resource
399	n/a	# it includes
400	n/a	#
401	n/a	# For now (since there are no options to change this),
402	n/a	# we use the source-directory for the include file and
403	n/a	# the build directory for the RC file and message
404	n/a	# resources. This works at least for win32all.
405	n/a
406	n/a	h_dir = os.path.dirname(src)
407	n/a	rc_dir = os.path.dirname(obj)
408	n/a	try:
409	n/a	# first compile .MC to .RC and .H file
410	n/a	self.spawn([self.mc] +
411	n/a	['-h', h_dir, '-r', rc_dir] + [src])
412	n/a	base, _ = os.path.splitext(os.path.basename(src))
413	n/a	rc_file = os.path.join(rc_dir, base + '.rc')
414	n/a	# then compile .RC to .RES file
415	n/a	self.spawn([self.rc] +
416	n/a	["/fo" + obj] + [rc_file])
417	n/a
418	n/a	except PackagingExecError as msg:
419	n/a	raise CompileError(msg)
420	n/a	continue
421	n/a	else:
422	n/a	# how to handle this file?
423	n/a	raise CompileError(
424	n/a	"Don't know how to compile %s to %s" %
425	n/a	(src, obj))
426	n/a
427	n/a	output_opt = "/Fo" + obj
428	n/a	try:
429	n/a	self.spawn([self.cc] + compile_opts + pp_opts +
430	n/a	[input_opt, output_opt] +
431	n/a	extra_postargs)
432	n/a	except PackagingExecError as msg:
433	n/a	raise CompileError(msg)
434	n/a
435	n/a	return objects
436	n/a
437	n/a	def create_static_lib(self, objects, output_libname, output_dir=None,
438	n/a	debug=False, target_lang=None):
439	n/a	if not self.initialized:
440	n/a	self.initialize()
441	n/a	objects, output_dir = self._fix_object_args(objects, output_dir)
442	n/a	output_filename = \
443	n/a	self.library_filename(output_libname, output_dir=output_dir)
444	n/a
445	n/a	if self._need_link(objects, output_filename):
446	n/a	lib_args = objects + ['/OUT:' + output_filename]
447	n/a	if debug:
448	n/a	pass # XXX what goes here?
449	n/a	try:
450	n/a	self.spawn([self.lib] + lib_args)
451	n/a	except PackagingExecError as msg:
452	n/a	raise LibError(msg)
453	n/a
454	n/a	else:
455	n/a	logger.debug("skipping %s (up-to-date)", output_filename)
456	n/a
457	n/a	def link(self, target_desc, objects, output_filename, output_dir=None,
458	n/a	libraries=None, library_dirs=None, runtime_library_dirs=None,
459	n/a	export_symbols=None, debug=False, extra_preargs=None,
460	n/a	extra_postargs=None, build_temp=None, target_lang=None):
461	n/a
462	n/a	if not self.initialized:
463	n/a	self.initialize()
464	n/a	objects, output_dir = self._fix_object_args(objects, output_dir)
465	n/a	libraries, library_dirs, runtime_library_dirs = \
466	n/a	self._fix_lib_args(libraries, library_dirs, runtime_library_dirs)
467	n/a
468	n/a	if runtime_library_dirs:
469	n/a	self.warn("don't know what to do with 'runtime_library_dirs': %s"
470	n/a	% (runtime_library_dirs,))
471	n/a
472	n/a	lib_opts = gen_lib_options(self, library_dirs, runtime_library_dirs,
473	n/a	libraries)
474	n/a	if output_dir is not None:
475	n/a	output_filename = os.path.join(output_dir, output_filename)
476	n/a
477	n/a	if self._need_link(objects, output_filename):
478	n/a
479	n/a	if target_desc == CCompiler.EXECUTABLE:
480	n/a	if debug:
481	n/a	ldflags = self.ldflags_shared_debug[1:]
482	n/a	else:
483	n/a	ldflags = self.ldflags_shared[1:]
484	n/a	else:
485	n/a	if debug:
486	n/a	ldflags = self.ldflags_shared_debug
487	n/a	else:
488	n/a	ldflags = self.ldflags_shared
489	n/a
490	n/a	export_opts = []
491	n/a	for sym in (export_symbols or []):
492	n/a	export_opts.append("/EXPORT:" + sym)
493	n/a
494	n/a	ld_args = (ldflags + lib_opts + export_opts +
495	n/a	objects + ['/OUT:' + output_filename])
496	n/a
497	n/a	# The MSVC linker generates .lib and .exp files, which cannot be
498	n/a	# suppressed by any linker switches. The .lib files may even be
499	n/a	# needed! Make sure they are generated in the temporary build
500	n/a	# directory. Since they have different names for debug and release
501	n/a	# builds, they can go into the same directory.
502	n/a	if export_symbols is not None:
503	n/a	dll_name, dll_ext = os.path.splitext(
504	n/a	os.path.basename(output_filename))
505	n/a	implib_file = os.path.join(
506	n/a	os.path.dirname(objects[0]),
507	n/a	self.library_filename(dll_name))
508	n/a	ld_args.append('/IMPLIB:' + implib_file)
509	n/a
510	n/a	if extra_preargs:
511	n/a	ld_args[:0] = extra_preargs
512	n/a	if extra_postargs:
513	n/a	ld_args.extend(extra_postargs)
514	n/a
515	n/a	self.mkpath(os.path.dirname(output_filename))
516	n/a	try:
517	n/a	self.spawn([self.linker] + ld_args)
518	n/a	except PackagingExecError as msg:
519	n/a	raise LinkError(msg)
520	n/a
521	n/a	else:
522	n/a	logger.debug("skipping %s (up-to-date)", output_filename)
523	n/a
524	n/a	# -- Miscellaneous methods -----------------------------------------
525	n/a	# These are all used by the 'gen_lib_options() function, in
526	n/a	# ccompiler.py.
527	n/a
528	n/a	def library_dir_option(self, dir):
529	n/a	return "/LIBPATH:" + dir
530	n/a
531	n/a	def runtime_library_dir_option(self, dir):
532	n/a	raise PackagingPlatformError("don't know how to set runtime library search path for MSVC++")
533	n/a
534	n/a	def library_option(self, lib):
535	n/a	return self.library_filename(lib)
536	n/a
537	n/a	def find_library_file(self, dirs, lib, debug=False):
538	n/a	# Prefer a debugging library if found (and requested), but deal
539	n/a	# with it if we don't have one.
540	n/a	if debug:
541	n/a	try_names = [lib + "_d", lib]
542	n/a	else:
543	n/a	try_names = [lib]
544	n/a	for dir in dirs:
545	n/a	for name in try_names:
546	n/a	libfile = os.path.join(dir, self.library_filename(name))
547	n/a	if os.path.exists(libfile):
548	n/a	return libfile
549	n/a	else:
550	n/a	# Oops, didn't find it in any of 'dirs'
551	n/a	return None
552	n/a
553	n/a	# Helper methods for using the MSVC registry settings
554	n/a
555	n/a	def find_exe(self, exe):
556	n/a	"""Return path to an MSVC executable program.
557	n/a
558	n/a	Tries to find the program in several places: first, one of the
559	n/a	MSVC program search paths from the registry; next, the directories
560	n/a	in the PATH environment variable. If any of those work, return an
561	n/a	absolute path that is known to exist. If none of them work, just
562	n/a	return the original program name, 'exe'.
563	n/a	"""
564	n/a
565	n/a	for p in self.__paths:
566	n/a	fn = os.path.join(os.path.abspath(p), exe)
567	n/a	if os.path.isfile(fn):
568	n/a	return fn
569	n/a
570	n/a	# didn't find it; try existing path
571	n/a	for p in os.environ['Path'].split(';'):
572	n/a	fn = os.path.join(os.path.abspath(p), exe)
573	n/a	if os.path.isfile(fn):
574	n/a	return fn
575	n/a
576	n/a	return exe
577	n/a
578	n/a	def get_msvc_paths(self, path, platform='x86'):
579	n/a	"""Get a list of devstudio directories (include, lib or path).
580	n/a
581	n/a	Return a list of strings. The list will be empty if unable to
582	n/a	access the registry or appropriate registry keys not found.
583	n/a	"""
584	n/a
585	n/a	if not _can_read_reg:
586	n/a	return []
587	n/a
588	n/a	path = path + " dirs"
589	n/a	if self.__version >= 7:
590	n/a	key = (r"%s\%0.1f\VC\VC_OBJECTS_PLATFORM_INFO\Win32\Directories"
591	n/a	% (self.__root, self.__version))
592	n/a	else:
593	n/a	key = (r"%s\6.0\Build System\Components\Platforms"
594	n/a	r"\Win32 (%s)\Directories" % (self.__root, platform))
595	n/a
596	n/a	for base in HKEYS:
597	n/a	d = read_values(base, key)
598	n/a	if d:
599	n/a	if self.__version >= 7:
600	n/a	return self.__macros.sub(d[path]).split(";")
601	n/a	else:
602	n/a	return d[path].split(";")
603	n/a	# MSVC 6 seems to create the registry entries we need only when
604	n/a	# the GUI is run.
605	n/a	if self.__version == 6:
606	n/a	for base in HKEYS:
607	n/a	if read_values(base, r"%s\6.0" % self.__root) is not None:
608	n/a	self.warn("It seems you have Visual Studio 6 installed, "
609	n/a	"but the expected registry settings are not present.\n"
610	n/a	"You must at least run the Visual Studio GUI once "
611	n/a	"so that these entries are created.")
612	n/a	break
613	n/a	return []
614	n/a
615	n/a	def set_path_env_var(self, name):
616	n/a	"""Set environment variable 'name' to an MSVC path type value.
617	n/a
618	n/a	This is equivalent to a SET command prior to execution of spawned
619	n/a	commands.
620	n/a	"""
621	n/a
622	n/a	if name == "lib":
623	n/a	p = self.get_msvc_paths("library")
624	n/a	else:
625	n/a	p = self.get_msvc_paths(name)
626	n/a	if p:
627	n/a	os.environ[name] = ';'.join(p)
628	n/a
629	n/a
630	n/a	if get_build_version() >= 8.0:
631	n/a	logger.debug("importing new compiler from distutils.msvc9compiler")
632	n/a	OldMSVCCompiler = MSVCCompiler
633	n/a	from packaging.compiler.msvc9compiler import MSVCCompiler
634	n/a	# get_build_architecture not really relevant now we support cross-compile
635	n/a	from packaging.compiler.msvc9compiler import MacroExpander