scons/gallium.py - platform/external/mesa3d - Gitiles

 """gallium

 Frontend-tool for Gallium3D architecture.

 """

 #
 # Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
 # All Rights Reserved.
 #
 # Permission is hereby granted, free of charge, to any person obtaining a
 # copy of this software and associated documentation files (the
 # "Software"), to deal in the Software without restriction, including
 # without limitation the rights to use, copy, modify, merge, publish,
 # distribute, sub license, and/or sell copies of the Software, and to
 # permit persons to whom the Software is furnished to do so, subject to
 # the following conditions:
 #
 # The above copyright notice and this permission notice (including the
 # next paragraph) shall be included in all copies or substantial portions
 # of the Software.
 #
 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 # OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 # MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
 # IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
 # ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 # TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 # SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #


 import os
 import os.path
 import re

 import SCons.Action
 import SCons.Builder
 import SCons.Scanner


 def quietCommandLines(env):
 	# Quiet command lines
 	# See also http://www.scons.org/wiki/HidingCommandLinesInOutput
 	env['CCCOMSTR'] = "Compiling $SOURCE ..."
 	env['CXXCOMSTR'] = "Compiling $SOURCE ..."
 	env['ARCOMSTR'] = "Archiving $TARGET ..."
 	env['RANLIBCOMSTR'] = ""
 	env['LINKCOMSTR'] = "Linking $TARGET ..."


 def createConvenienceLibBuilder(env):
     """This is a utility function that creates the ConvenienceLibrary
     Builder in an Environment if it is not there already.

     If it is already there, we return the existing one.

     Based on the stock StaticLibrary and SharedLibrary builders.
     """

     try:
         convenience_lib = env['BUILDERS']['ConvenienceLibrary']
     except KeyError:
         action_list = [ SCons.Action.Action("$ARCOM", "$ARCOMSTR") ]
         if env.Detect('ranlib'):
             ranlib_action = SCons.Action.Action("$RANLIBCOM", "$RANLIBCOMSTR")
             action_list.append(ranlib_action)

         convenience_lib = SCons.Builder.Builder(action = action_list,
                                   emitter = '$LIBEMITTER',
                                   prefix = '$LIBPREFIX',
                                   suffix = '$LIBSUFFIX',
                                   src_suffix = '$SHOBJSUFFIX',
                                   src_builder = 'SharedObject')
         env['BUILDERS']['ConvenienceLibrary'] = convenience_lib

     return convenience_lib


 # TODO: handle import statements with multiple modules
 # TODO: handle from import statements
 import_re = re.compile(r'^import\s+(\S+)$', re.M)

 def python_scan(node, env, path):
 	# http://www.scons.org/doc/0.98.5/HTML/scons-user/c2781.html#AEN2789
 	contents = node.get_contents()
 	source_dir = node.get_dir()
 	imports = import_re.findall(contents)
 	results = []
 	for imp in imports:
 		for dir in path:
 			file = os.path.join(str(dir), imp.replace('.', os.sep) + '.py')
 			if os.path.exists(file):
 				results.append(env.File(file))
 				break
 			file = os.path.join(str(dir), imp.replace('.', os.sep), '__init__.py')
 			if os.path.exists(file):
 				results.append(env.File(file))
 				break
 	return results

 python_scanner = SCons.Scanner.Scanner(function = python_scan, skeys = ['.py'])


 def code_generate(env, script, target, source, command):
 	"""Method to simplify code generation via python scripts.

 	http://www.scons.org/wiki/UsingCodeGenerators
 	http://www.scons.org/doc/0.98.5/HTML/scons-user/c2768.html
 	"""

 	# We're generating code using Python scripts, so we have to be
 	# careful with our scons elements.  This entry represents
 	# the generator file *in the source directory*.
 	script_src = env.File(script).srcnode()

 	# This command creates generated code *in the build directory*.
 	command = command.replace('$SCRIPT', script_src.path)
 	code = env.Command(target, source, command)

 	# Explicitly mark that the generated code depends on the generator,
 	# and on implicitly imported python modules
 	path = (script_src.get_dir(),)
 	deps = [script_src]
 	deps += script_src.get_implicit_deps(env, python_scanner, path)
 	env.Depends(code, deps)

 	# Running the Python script causes .pyc files to be generated in the
 	# source directory.  When we clean up, they should go too. So add side
 	# effects for .pyc files
 	for dep in deps:
 		pyc = env.File(str(dep) + 'c')
 		env.SideEffect(pyc, code)

 	return code


 def createCodeGenerateMethod(env):
 	env.Append(SCANNERS = python_scanner)
 	env.AddMethod(code_generate, 'CodeGenerate')


 def generate(env):
 	"""Common environment generation code"""

 	# FIXME: this is already too late
 	#if env.get('quiet', False):
 	#	quietCommandLines(env)

 	# shortcuts
 	debug = env['debug']
 	machine = env['machine']
 	platform = env['platform']
 	x86 = env['machine'] == 'x86'
 	gcc = env['platform'] in ('linux', 'freebsd', 'darwin')
 	msvc = env['platform'] in ('windows', 'winddk', 'wince')

 	# Tool
 	if platform == 'winddk':
 		env.Tool('winddk')
 	elif platform == 'wince':
 		env.Tool('wcesdk')
 	else:
 		env.Tool('default')

 	# Put build output in a separate dir, which depends on the current
 	# configuration. See also http://www.scons.org/wiki/AdvancedBuildExample
 	build_topdir = 'build'
 	build_subdir = env['platform']
 	if env['dri']:
 		build_subdir += "-dri"
 	if env['llvm']:
 		build_subdir += "-llvm"
 	if env['machine'] != 'generic':
 		build_subdir += '-' + env['machine']
 	if env['debug']:
 		build_subdir += "-debug"
 	if env['profile']:
 		build_subdir += "-profile"
 	build_dir = os.path.join(build_topdir, build_subdir)
 	# Place the .sconsign file in the build dir too, to avoid issues with
 	# different scons versions building the same source file
 	env['build'] = build_dir
 	env.SConsignFile(os.path.join(build_dir, '.sconsign'))

 	# C preprocessor options
 	cppdefines = []
 	if debug:
 		cppdefines += ['DEBUG']
 	else:
 		cppdefines += ['NDEBUG']
 	if env['profile']:
 		cppdefines += ['PROFILE']
 	if platform == 'windows':
 		cppdefines += [
 			'WIN32',
 			'_WINDOWS',
 			'_UNICODE',
 			'UNICODE',
 			# http://msdn2.microsoft.com/en-us/library/6dwk3a1z.aspx,
 			'WIN32_LEAN_AND_MEAN',
 			'VC_EXTRALEAN',
 			'_CRT_SECURE_NO_DEPRECATE',
 		]
 		if debug:
 			cppdefines += ['_DEBUG']
 	if platform == 'winddk':
 		# Mimic WINDDK's builtin flags. See also:
 		# - WINDDK's bin/makefile.new i386mk.inc for more info.
 		# - buildchk_wxp_x86.log files, generated by the WINDDK's build
 		# - http://alter.org.ua/docs/nt_kernel/vc8_proj/
 		cppdefines += [
 			('_X86_', '1'),
 			('i386', '1'),
 			'STD_CALL',
 			('CONDITION_HANDLING', '1'),
 			('NT_INST', '0'),
 			('WIN32', '100'),
 			('_NT1X_', '100'),
 			('WINNT', '1'),
 			('_WIN32_WINNT', '0x0501'), # minimum required OS version
 			('WINVER', '0x0501'),
 			('_WIN32_IE', '0x0603'),
 			('WIN32_LEAN_AND_MEAN', '1'),
 			('DEVL', '1'),
 			('__BUILDMACHINE__', 'WinDDK'),
 			('FPO', '0'),
 		]
 		if debug:
 			cppdefines += [('DBG', 1)]
 	if platform == 'wince':
 		cppdefines += [
 			'_CRT_SECURE_NO_DEPRECATE',
 			'_USE_32BIT_TIME_T',
 			'UNICODE',
 			'_UNICODE',
 			('UNDER_CE', '600'),
 			('_WIN32_WCE', '0x600'),
 			'WINCEOEM',
 			'WINCEINTERNAL',
 			'WIN32',
 			'STRICT',
 			'x86',
 			'_X86_',
 			'INTERNATIONAL',
 			('INTLMSG_CODEPAGE', '1252'),
 		]
 	if platform == 'windows':
 		cppdefines += ['PIPE_SUBSYSTEM_WINDOWS_USER']
 	if platform == 'winddk':
 		cppdefines += ['PIPE_SUBSYSTEM_WINDOWS_DISPLAY']
 	if platform == 'wince':
 		cppdefines += ['PIPE_SUBSYSTEM_WINDOWS_CE']
 	env.Append(CPPDEFINES = cppdefines)

 	# C preprocessor includes
 	if platform == 'winddk':
 		env.Append(CPPPATH = [
 			env['SDK_INC_PATH'],
 			env['DDK_INC_PATH'],
 			env['WDM_INC_PATH'],
 			env['CRT_INC_PATH'],
 		])

 	# C compiler options
 	cflags = []
 	if gcc:
 		if debug:
 			cflags += ['-O0', '-g3']
 		else:
 			cflags += ['-O3', '-g3']
 		if env['profile']:
 			cflags += ['-pg']
 		if env['machine'] == 'x86':
 			cflags += ['-m32']
 		if env['machine'] == 'x86_64':
 			cflags += ['-m64']
 		cflags += [
 			'-Wall',
 			'-Wmissing-prototypes',
 			'-Wno-long-long',
 			'-ffast-math',
 			'-pedantic',
 			'-fmessage-length=0', # be nice to Eclipse
 		]
 	if msvc:
 		# See also:
 		# - http://msdn2.microsoft.com/en-us/library/y0zzbyt4.aspx
 		# - cl /?
 		if debug:
 			cflags += [
 			  '/Od', # disable optimizations
 			  '/Oi', # enable intrinsic functions
 			  '/Oy-', # disable frame pointer omission
 			]
 		else:
 			cflags += [
 			  '/Ox', # maximum optimizations
 			  '/Oi', # enable intrinsic functions
 			  '/Os', # favor code space
 			]
 		if env['profile']:
 			cflags += [
 				'/Gh', # enable _penter hook function
 				'/GH', # enable _pexit hook function
 			]
 		cflags += [
 			'/W3', # warning level
 			#'/Wp64', # enable 64 bit porting warnings
 		]
 		if platform == 'windows':
 			cflags += [
 				# TODO
 			]
 		if platform == 'winddk':
 			cflags += [
 				'/Zl', # omit default library name in .OBJ
 				'/Zp8', # 8bytes struct member alignment
 				'/Gy', # separate functions for linker
 				'/Gm-', # disable minimal rebuild
 				'/WX', # treat warnings as errors
 				'/Gz', # __stdcall Calling convention
 				'/GX-', # disable C++ EH
 				'/GR-', # disable C++ RTTI
 				'/GF', # enable read-only string pooling
 				'/G6', # optimize for PPro, P-II, P-III
 				'/Ze', # enable extensions
 				'/Gi-', # disable incremental compilation
 				'/QIfdiv-', # disable Pentium FDIV fix
 				'/hotpatch', # prepares an image for hotpatching.
 				#'/Z7', #enable old-style debug info
 			]
 		if platform == 'wince':
 			# See also C:\WINCE600\public\common\oak\misc\makefile.def
 			cflags += [
 				'/GF', # enable read-only string pooling
 				'/GR-', # disable C++ RTTI
 				'/GS', # enable security checks
 				# Allow disabling language conformance to maintain backward compat
 				#'/Zc:wchar_t-', # don't force wchar_t as native type, instead of typedef
 				#'/Zc:forScope-', # don't enforce Standard C++ for scoping rules
 				#'/wd4867',
 				#'/wd4430',
 				#'/MT',
 				#'/U_MT',
 			]
 		# Automatic pdb generation
 		# See http://scons.tigris.org/issues/show_bug.cgi?id=1656
 		env.EnsureSConsVersion(0, 98, 0)
 		env['PDB'] = '${TARGET.base}.pdb'
 	env.Append(CFLAGS = cflags)
 	env.Append(CXXFLAGS = cflags)

 	# Assembler options
 	if gcc:
 		if env['machine'] == 'x86':
 			env.Append(ASFLAGS = ['-m32'])
 		if env['machine'] == 'x86_64':
 			env.Append(ASFLAGS = ['-m64'])

 	# Linker options
 	linkflags = []
 	if gcc:
 		if env['machine'] == 'x86':
 			linkflags += ['-m32']
 		if env['machine'] == 'x86_64':
 			linkflags += ['-m64']
 	if platform == 'winddk':
 		# See also:
 		# - http://msdn2.microsoft.com/en-us/library/y0zzbyt4.aspx
 		linkflags += [
 			'/merge:_PAGE=PAGE',
 			'/merge:_TEXT=.text',
 			'/section:INIT,d',
 			'/opt:ref',
 			'/opt:icf',
 			'/ignore:4198,4010,4037,4039,4065,4070,4078,4087,4089,4221',
 			'/incremental:no',
 			'/fullbuild',
 			'/release',
 			'/nodefaultlib',
 			'/wx',
 			'/debug',
 			'/debugtype:cv',
 			'/version:5.1',
 			'/osversion:5.1',
 			'/functionpadmin:5',
 			'/safeseh',
 			'/pdbcompress',
 			'/stack:0x40000,0x1000',
 			'/driver',
 			'/align:0x80',
 			'/subsystem:native,5.01',
 			'/base:0x10000',

 			'/entry:DrvEnableDriver',
 		]
 		if env['profile']:
 			linkflags += [
 				'/MAP', # http://msdn.microsoft.com/en-us/library/k7xkk3e2.aspx
 			]
 	env.Append(LINKFLAGS = linkflags)

 	# Custom builders and methods
 	createConvenienceLibBuilder(env)
 	createCodeGenerateMethod(env)

 	# for debugging
 	#print env.Dump()


 def exists(env):
 	return 1
	"""gallium

	Frontend-tool for Gallium3D architecture.

	"""

	#
	# Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
	# All Rights Reserved.
	#
	# Permission is hereby granted, free of charge, to any person obtaining a
	# copy of this software and associated documentation files (the
	# "Software"), to deal in the Software without restriction, including
	# without limitation the rights to use, copy, modify, merge, publish,
	# distribute, sub license, and/or sell copies of the Software, and to
	# permit persons to whom the Software is furnished to do so, subject to
	# the following conditions:
	#
	# The above copyright notice and this permission notice (including the
	# next paragraph) shall be included in all copies or substantial portions
	# of the Software.
	#
	# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
	# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
	# IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
	# ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
	# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
	# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
	#


	import os
	import os.path
	import re

	import SCons.Action
	import SCons.Builder
	import SCons.Scanner


	def quietCommandLines(env):
	# Quiet command lines
	# See also http://www.scons.org/wiki/HidingCommandLinesInOutput
	env['CCCOMSTR'] = "Compiling $SOURCE ..."
	env['CXXCOMSTR'] = "Compiling $SOURCE ..."
	env['ARCOMSTR'] = "Archiving $TARGET ..."
	env['RANLIBCOMSTR'] = ""
	env['LINKCOMSTR'] = "Linking $TARGET ..."


	def createConvenienceLibBuilder(env):
	"""This is a utility function that creates the ConvenienceLibrary
	Builder in an Environment if it is not there already.

	If it is already there, we return the existing one.

	Based on the stock StaticLibrary and SharedLibrary builders.
	"""

	try:
	convenience_lib = env['BUILDERS']['ConvenienceLibrary']
	except KeyError:
	action_list = [ SCons.Action.Action("$ARCOM", "$ARCOMSTR") ]
	if env.Detect('ranlib'):
	ranlib_action = SCons.Action.Action("$RANLIBCOM", "$RANLIBCOMSTR")
	action_list.append(ranlib_action)

	convenience_lib = SCons.Builder.Builder(action = action_list,
	emitter = '$LIBEMITTER',
	prefix = '$LIBPREFIX',
	suffix = '$LIBSUFFIX',
	src_suffix = '$SHOBJSUFFIX',
	src_builder = 'SharedObject')
	env['BUILDERS']['ConvenienceLibrary'] = convenience_lib

	return convenience_lib


	# TODO: handle import statements with multiple modules
	# TODO: handle from import statements
	import_re = re.compile(r'^import\s+(\S+)$', re.M)

	def python_scan(node, env, path):
	# http://www.scons.org/doc/0.98.5/HTML/scons-user/c2781.html#AEN2789
	contents = node.get_contents()
	source_dir = node.get_dir()
	imports = import_re.findall(contents)
	results = []
	for imp in imports:
	for dir in path:
	file = os.path.join(str(dir), imp.replace('.', os.sep) + '.py')
	if os.path.exists(file):
	results.append(env.File(file))
	break
	file = os.path.join(str(dir), imp.replace('.', os.sep), '__init__.py')
	if os.path.exists(file):
	results.append(env.File(file))
	break
	return results

	python_scanner = SCons.Scanner.Scanner(function = python_scan, skeys = ['.py'])


	def code_generate(env, script, target, source, command):
	"""Method to simplify code generation via python scripts.

	http://www.scons.org/wiki/UsingCodeGenerators
	http://www.scons.org/doc/0.98.5/HTML/scons-user/c2768.html
	"""

	# We're generating code using Python scripts, so we have to be
	# careful with our scons elements. This entry represents
	# the generator file in the source directory.
	script_src = env.File(script).srcnode()

	# This command creates generated code in the build directory.
	command = command.replace('$SCRIPT', script_src.path)
	code = env.Command(target, source, command)

	# Explicitly mark that the generated code depends on the generator,
	# and on implicitly imported python modules
	path = (script_src.get_dir(),)
	deps = [script_src]
	deps += script_src.get_implicit_deps(env, python_scanner, path)
	env.Depends(code, deps)

	# Running the Python script causes .pyc files to be generated in the
	# source directory. When we clean up, they should go too. So add side
	# effects for .pyc files
	for dep in deps:
	pyc = env.File(str(dep) + 'c')
	env.SideEffect(pyc, code)

	return code


	def createCodeGenerateMethod(env):
	env.Append(SCANNERS = python_scanner)
	env.AddMethod(code_generate, 'CodeGenerate')


	def generate(env):
	"""Common environment generation code"""

	# FIXME: this is already too late
	#if env.get('quiet', False):
	# quietCommandLines(env)

	# shortcuts
	debug = env['debug']
	machine = env['machine']
	platform = env['platform']
	x86 = env['machine'] == 'x86'
	gcc = env['platform'] in ('linux', 'freebsd', 'darwin')
	msvc = env['platform'] in ('windows', 'winddk', 'wince')

	# Tool
	if platform == 'winddk':
	env.Tool('winddk')
	elif platform == 'wince':
	env.Tool('wcesdk')
	else:
	env.Tool('default')

	# Put build output in a separate dir, which depends on the current
	# configuration. See also http://www.scons.org/wiki/AdvancedBuildExample
	build_topdir = 'build'
	build_subdir = env['platform']
	if env['dri']:
	build_subdir += "-dri"
	if env['llvm']:
	build_subdir += "-llvm"
	if env['machine'] != 'generic':
	build_subdir += '-' + env['machine']
	if env['debug']:
	build_subdir += "-debug"
	if env['profile']:
	build_subdir += "-profile"
	build_dir = os.path.join(build_topdir, build_subdir)
	# Place the .sconsign file in the build dir too, to avoid issues with
	# different scons versions building the same source file
	env['build'] = build_dir
	env.SConsignFile(os.path.join(build_dir, '.sconsign'))

	# C preprocessor options
	cppdefines = []
	if debug:
	cppdefines += ['DEBUG']
	else:
	cppdefines += ['NDEBUG']
	if env['profile']:
	cppdefines += ['PROFILE']
	if platform == 'windows':
	cppdefines += [
	'WIN32',
	'_WINDOWS',
	'_UNICODE',
	'UNICODE',
	# http://msdn2.microsoft.com/en-us/library/6dwk3a1z.aspx,
	'WIN32_LEAN_AND_MEAN',
	'VC_EXTRALEAN',
	'_CRT_SECURE_NO_DEPRECATE',
	]
	if debug:
	cppdefines += ['_DEBUG']
	if platform == 'winddk':
	# Mimic WINDDK's builtin flags. See also:
	# - WINDDK's bin/makefile.new i386mk.inc for more info.
	# - buildchk_wxp_x86.log files, generated by the WINDDK's build
	# - http://alter.org.ua/docs/nt_kernel/vc8_proj/
	cppdefines += [
	('_X86_', '1'),
	('i386', '1'),
	'STD_CALL',
	('CONDITION_HANDLING', '1'),
	('NT_INST', '0'),
	('WIN32', '100'),
	('_NT1X_', '100'),
	('WINNT', '1'),
	('_WIN32_WINNT', '0x0501'), # minimum required OS version
	('WINVER', '0x0501'),
	('_WIN32_IE', '0x0603'),
	('WIN32_LEAN_AND_MEAN', '1'),
	('DEVL', '1'),
	('__BUILDMACHINE__', 'WinDDK'),
	('FPO', '0'),
	]
	if debug:
	cppdefines += [('DBG', 1)]
	if platform == 'wince':
	cppdefines += [
	'_CRT_SECURE_NO_DEPRECATE',
	'_USE_32BIT_TIME_T',
	'UNICODE',
	'_UNICODE',
	('UNDER_CE', '600'),
	('_WIN32_WCE', '0x600'),
	'WINCEOEM',
	'WINCEINTERNAL',
	'WIN32',
	'STRICT',
	'x86',
	'_X86_',
	'INTERNATIONAL',
	('INTLMSG_CODEPAGE', '1252'),
	]
	if platform == 'windows':
	cppdefines += ['PIPE_SUBSYSTEM_WINDOWS_USER']
	if platform == 'winddk':
	cppdefines += ['PIPE_SUBSYSTEM_WINDOWS_DISPLAY']
	if platform == 'wince':
	cppdefines += ['PIPE_SUBSYSTEM_WINDOWS_CE']
	env.Append(CPPDEFINES = cppdefines)

	# C preprocessor includes
	if platform == 'winddk':
	env.Append(CPPPATH = [
	env['SDK_INC_PATH'],
	env['DDK_INC_PATH'],
	env['WDM_INC_PATH'],
	env['CRT_INC_PATH'],
	])

	# C compiler options
	cflags = []
	if gcc:
	if debug:
	cflags += ['-O0', '-g3']
	else:
	cflags += ['-O3', '-g3']
	if env['profile']:
	cflags += ['-pg']
	if env['machine'] == 'x86':
	cflags += ['-m32']
	if env['machine'] == 'x86_64':
	cflags += ['-m64']
	cflags += [
	'-Wall',
	'-Wmissing-prototypes',
	'-Wno-long-long',
	'-ffast-math',
	'-pedantic',
	'-fmessage-length=0', # be nice to Eclipse
	]
	if msvc:
	# See also:
	# - http://msdn2.microsoft.com/en-us/library/y0zzbyt4.aspx
	# - cl /?
	if debug:
	cflags += [
	'/Od', # disable optimizations
	'/Oi', # enable intrinsic functions
	'/Oy-', # disable frame pointer omission
	]
	else:
	cflags += [
	'/Ox', # maximum optimizations
	'/Oi', # enable intrinsic functions
	'/Os', # favor code space
	]
	if env['profile']:
	cflags += [
	'/Gh', # enable _penter hook function
	'/GH', # enable _pexit hook function
	]
	cflags += [
	'/W3', # warning level
	#'/Wp64', # enable 64 bit porting warnings
	]
	if platform == 'windows':
	cflags += [
	# TODO
	]
	if platform == 'winddk':
	cflags += [
	'/Zl', # omit default library name in .OBJ
	'/Zp8', # 8bytes struct member alignment
	'/Gy', # separate functions for linker
	'/Gm-', # disable minimal rebuild
	'/WX', # treat warnings as errors
	'/Gz', # __stdcall Calling convention
	'/GX-', # disable C++ EH
	'/GR-', # disable C++ RTTI
	'/GF', # enable read-only string pooling
	'/G6', # optimize for PPro, P-II, P-III
	'/Ze', # enable extensions
	'/Gi-', # disable incremental compilation
	'/QIfdiv-', # disable Pentium FDIV fix
	'/hotpatch', # prepares an image for hotpatching.
	#'/Z7', #enable old-style debug info
	]
	if platform == 'wince':
	# See also C:\WINCE600\public\common\oak\misc\makefile.def
	cflags += [
	'/GF', # enable read-only string pooling
	'/GR-', # disable C++ RTTI
	'/GS', # enable security checks
	# Allow disabling language conformance to maintain backward compat
	#'/Zc:wchar_t-', # don't force wchar_t as native type, instead of typedef
	#'/Zc:forScope-', # don't enforce Standard C++ for scoping rules
	#'/wd4867',
	#'/wd4430',
	#'/MT',
	#'/U_MT',
	]
	# Automatic pdb generation
	# See http://scons.tigris.org/issues/show_bug.cgi?id=1656
	env.EnsureSConsVersion(0, 98, 0)
	env['PDB'] = '${TARGET.base}.pdb'
	env.Append(CFLAGS = cflags)
	env.Append(CXXFLAGS = cflags)

	# Assembler options
	if gcc:
	if env['machine'] == 'x86':
	env.Append(ASFLAGS = ['-m32'])
	if env['machine'] == 'x86_64':
	env.Append(ASFLAGS = ['-m64'])

	# Linker options
	linkflags = []
	if gcc:
	if env['machine'] == 'x86':
	linkflags += ['-m32']
	if env['machine'] == 'x86_64':
	linkflags += ['-m64']
	if platform == 'winddk':
	# See also:
	# - http://msdn2.microsoft.com/en-us/library/y0zzbyt4.aspx
	linkflags += [
	'/merge:_PAGE=PAGE',
	'/merge:_TEXT=.text',
	'/section:INIT,d',
	'/opt:ref',
	'/opt:icf',
	'/ignore:4198,4010,4037,4039,4065,4070,4078,4087,4089,4221',
	'/incremental:no',
	'/fullbuild',
	'/release',
	'/nodefaultlib',
	'/wx',
	'/debug',
	'/debugtype:cv',
	'/version:5.1',
	'/osversion:5.1',
	'/functionpadmin:5',
	'/safeseh',
	'/pdbcompress',
	'/stack:0x40000,0x1000',
	'/driver',
	'/align:0x80',
	'/subsystem:native,5.01',
	'/base:0x10000',

	'/entry:DrvEnableDriver',
	]
	if env['profile']:
	linkflags += [
	'/MAP', # http://msdn.microsoft.com/en-us/library/k7xkk3e2.aspx
	]
	env.Append(LINKFLAGS = linkflags)

	# Custom builders and methods
	createConvenienceLibBuilder(env)
	createCodeGenerateMethod(env)

	# for debugging
	#print env.Dump()


	def exists(env):
	return 1