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diff --git a/scons/dxsdk.py b/scons/dxsdk.py
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+"""dxsdk
+
+Tool-specific initialization for Microsoft DirectX SDK
+
+"""
+
+#
+# Copyright (c) 2009 VMware, Inc.
+#
+# 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, sublicense, 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 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
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 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 SCons.Errors
+import SCons.Util
+
+
+def get_dxsdk_root(env):
+ try:
+ return os.environ['DXSDK_DIR']
+ except KeyError:
+ return None
+
+def get_dxsdk_paths(env):
+ dxsdk_root = get_dxsdk_root(env)
+ if dxsdk_root is None:
+ raise SCons.Errors.InternalError, "DirectX SDK not found"
+
+ if env['machine'] in ('generic', 'x86'):
+ target_cpu = 'x86'
+ elif env['machine'] == 'x86_64':
+ target_cpu = 'x64'
+ else:
+ raise SCons.Errors.InternalError, "Unsupported target machine"
+ include_dir = 'Include'
+
+ env.Append(CPPDEFINES = [('HAVE_DXSDK', '1')])
+ env.Prepend(CPPPATH = [os.path.join(dxsdk_root, 'Include')])
+ env.Prepend(LIBPATH = [os.path.join(dxsdk_root, 'Lib', target_cpu)])
+
+def generate(env):
+ get_dxsdk_paths(env)
+
+def exists(env):
+ return get_dxsdk_root(env) is not None
+
+# vim:set ts=4 sw=4 et: