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diff --git a/tools/scons-1.2.0/engine/SCons/Tool/pdflatex.py b/tools/scons-1.2.0/engine/SCons/Tool/pdflatex.py
new file mode 100644
index 0000000..5ffb9cb
--- /dev/null
+++ b/tools/scons-1.2.0/engine/SCons/Tool/pdflatex.py
@@ -0,0 +1,75 @@
+"""SCons.Tool.pdflatex
+
+Tool-specific initialization for pdflatex.
+
+There normally shouldn't be any need to import this module directly.
+It will usually be imported through the generic SCons.Tool.Tool()
+selection method.
+
+"""
+
+#
+# Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 The SCons Foundation
+#
+# 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.
+#
+
+__revision__ = "src/engine/SCons/Tool/pdflatex.py 3842 2008/12/20 22:59:52 scons"
+
+import SCons.Action
+import SCons.Util
+import SCons.Tool.pdf
+import SCons.Tool.tex
+
+PDFLaTeXAction = None
+
+def PDFLaTeXAuxFunction(target = None, source= None, env=None):
+    result = SCons.Tool.tex.InternalLaTeXAuxAction( PDFLaTeXAction, target, source, env )
+    return result
+
+PDFLaTeXAuxAction = None
+
+def generate(env):
+    """Add Builders and construction variables for pdflatex to an Environment."""
+    global PDFLaTeXAction
+    if PDFLaTeXAction is None:
+        PDFLaTeXAction = SCons.Action.Action('$PDFLATEXCOM', '$PDFLATEXCOMSTR')
+
+    global PDFLaTeXAuxAction
+    if PDFLaTeXAuxAction is None:
+        PDFLaTeXAuxAction = SCons.Action.Action(PDFLaTeXAuxFunction,
+                              strfunction=SCons.Tool.tex.TeXLaTeXStrFunction)
+
+    import pdf
+    pdf.generate(env)
+
+    bld = env['BUILDERS']['PDF']
+    bld.add_action('.ltx', PDFLaTeXAuxAction)
+    bld.add_action('.latex', PDFLaTeXAuxAction)
+    bld.add_emitter('.ltx', SCons.Tool.tex.tex_pdf_emitter)
+    bld.add_emitter('.latex', SCons.Tool.tex.tex_pdf_emitter)
+
+    env['PDFLATEX']      = 'pdflatex'
+    env['PDFLATEXFLAGS'] = SCons.Util.CLVar('-interaction=nonstopmode')
+    env['PDFLATEXCOM']   = 'cd ${TARGET.dir} && $PDFLATEX $PDFLATEXFLAGS ${SOURCE.file}'
+    env['LATEXRETRIES']  = 3
+
+def exists(env):
+    return env.Detect('pdflatex')