Update SCons to latest checkpoint release, 1.2.0.d20090113....

third_party/scons/scons-local/SCons/Tool/msvc.py

Index: third_party/scons/scons-local/SCons/Tool/msvc.py
===================================================================
--- third_party/scons/scons-local/SCons/Tool/msvc.py	(revision 9094)
+++ third_party/scons/scons-local/SCons/Tool/msvc.py	(working copy)
@@ -9,7 +9,7 @@
 """
 
 #
-# Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 The SCons Foundation
+# Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 The SCons Foundation
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the
@@ -31,7 +31,7 @@
 # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #
 
-__revision__ = "src/engine/SCons/Tool/msvc.py 3842 2008/12/20 22:59:52 scons"
+__revision__ = "src/engine/SCons/Tool/msvc.py 3897 2009/01/13 06:45:54 scons"
 
 import os.path
 import re
@@ -672,40 +672,103 @@
                                     src_builder=[],
                                     source_scanner=res_scanner)
 
+def msvc_batch_key(action, env, target, source):
+    """
+    Returns a key to identify unique batches of sources for compilation.
 
+    If batching is enabled (via the $MSVC_BATCH setting), then all
+    target+source pairs that use the same action, defined by the same
+    environment, and have the same target and source directories, will
+    be batched.
+
+    Returning None specifies that the specified target+source should not
+    be batched with other compilations.
+    """
+    b = env.subst('$MSVC_BATCH')
+    if b in (None, '', '0'):
+        # We're not using batching; return no key.
+        return None
+    t = target[0]
+    s = source[0]
+    if os.path.splitext(t.name)[0] != os.path.splitext(s.name)[0]:
+        # The base names are different, so this *must* be compiled
+        # separately; return no key.
+        return None
+    return (id(action), id(env), t.dir, s.dir)
+
+def msvc_output_flag(target, source, env, for_signature):
+    """
+    Returns the correct /Fo flag for batching.
+
+    If batching is disabled or there's only one source file, then we
+    return an /Fo string that specifies the target explicitly.  Otherwise,
+    we return an /Fo string that just specifies the first target's
+    directory (where the Visual C/C++ compiler will put the .obj files).
+    """
+    b = env.subst('$MSVC_BATCH')
+    if b in (None, '', '0') or len(source) == 1:
+        return '/Fo$TARGET'
+    else:
+        # The Visual C/C++ compiler requires a \ at the end of the /Fo
+        # option to indicate an output directory.  We use os.sep here so
+        # that the test(s) for this can be run on non-Windows systems
+        # without having a hard-coded backslash mess up command-line
+        # argument parsing.
+        return '/Fo${TARGET.dir}' + os.sep
+
+CAction = SCons.Action.Action("$CCCOM", "$CCCOMSTR",
+                              batch_key=msvc_batch_key,
+                              targets='$CHANGED_TARGETS')
+ShCAction = SCons.Action.Action("$SHCCCOM", "$SHCCCOMSTR",
+                                batch_key=msvc_batch_key,
+                                targets='$CHANGED_TARGETS')
+CXXAction = SCons.Action.Action("$CXXCOM", "$CXXCOMSTR",
+                                batch_key=msvc_batch_key,
+                                targets='$CHANGED_TARGETS')
+ShCXXAction = SCons.Action.Action("$SHCXXCOM", "$SHCXXCOMSTR",
+                                  batch_key=msvc_batch_key,
+                                  targets='$CHANGED_TARGETS')
+
 def generate(env):
     """Add Builders and construction variables for MSVC++ to an Environment."""
     static_obj, shared_obj = SCons.Tool.createObjBuilders(env)
 
+    # TODO(batch):  shouldn't reach in to cmdgen this way; necessary
+    # for now to bypass the checks in Builder.DictCmdGenerator.__call__()
+    # and allow .cc and .cpp to be compiled in the same command line.
+    static_obj.cmdgen.source_ext_match = False
+    shared_obj.cmdgen.source_ext_match = False
+
     for suffix in CSuffixes:
-        static_obj.add_action(suffix, SCons.Defaults.CAction)
-        shared_obj.add_action(suffix, SCons.Defaults.ShCAction)
+        static_obj.add_action(suffix, CAction)
+        shared_obj.add_action(suffix, ShCAction)
         static_obj.add_emitter(suffix, static_object_emitter)
         shared_obj.add_emitter(suffix, shared_object_emitter)
 
     for suffix in CXXSuffixes:
-        static_obj.add_action(suffix, SCons.Defaults.CXXAction)
-        shared_obj.add_action(suffix, SCons.Defaults.ShCXXAction)
+        static_obj.add_action(suffix, CXXAction)
+        shared_obj.add_action(suffix, ShCXXAction)
         static_obj.add_emitter(suffix, static_object_emitter)
         shared_obj.add_emitter(suffix, shared_object_emitter)
 
     env['CCPDBFLAGS'] = SCons.Util.CLVar(['${(PDB and "/Z7") or ""}'])
     env['CCPCHFLAGS'] = SCons.Util.CLVar(['${(PCH and "/Yu%s /Fp%s"%(PCHSTOP or "",File(PCH))) or ""}'])
+    env['_MSVC_OUTPUT_FLAG'] = msvc_output_flag
     env['_CCCOMCOM']  = '$CPPFLAGS $_CPPDEFFLAGS $_CPPINCFLAGS $CCPCHFLAGS $CCPDBFLAGS'
     env['CC']         = 'cl'
     env['CCFLAGS']    = SCons.Util.CLVar('/nologo')
     env['CFLAGS']     = SCons.Util.CLVar('')
-    env['CCCOM']      = '$CC /Fo$TARGET /c $SOURCES $CFLAGS $CCFLAGS $_CCCOMCOM'
+    env['CCCOM']      = '$CC $_MSVC_OUTPUT_FLAG /c $CHANGED_SOURCES $CFLAGS $CCFLAGS $_CCCOMCOM'
     env['SHCC']       = '$CC'
     env['SHCCFLAGS']  = SCons.Util.CLVar('$CCFLAGS')
     env['SHCFLAGS']   = SCons.Util.CLVar('$CFLAGS')
-    env['SHCCCOM']    = '$SHCC /Fo$TARGET /c $SOURCES $SHCFLAGS $SHCCFLAGS $_CCCOMCOM'
+    env['SHCCCOM']    = '$SHCC $_MSVC_OUTPUT_FLAG /c $CHANGED_SOURCES $SHCFLAGS $SHCCFLAGS $_CCCOMCOM'
     env['CXX']        = '$CC'
-    env['CXXFLAGS']   = SCons.Util.CLVar('$CCFLAGS $( /TP $)')
-    env['CXXCOM']     = '$CXX /Fo$TARGET /c $SOURCES $CXXFLAGS $CCFLAGS $_CCCOMCOM'
+    env['CXXFLAGS']   = SCons.Util.CLVar('$( /TP $)')
+    env['CXXCOM']     = '$CXX $_MSVC_OUTPUT_FLAG /c $CHANGED_SOURCES $CXXFLAGS $CCFLAGS $_CCCOMCOM'
     env['SHCXX']      = '$CXX'
     env['SHCXXFLAGS'] = SCons.Util.CLVar('$CXXFLAGS')
-    env['SHCXXCOM']   = '$SHCXX /Fo$TARGET /c $SOURCES $SHCXXFLAGS $SHCCFLAGS $_CCCOMCOM'
+    env['SHCXXCOM']   = '$SHCXX $_MSVC_OUTPUT_FLAG /c $CHANGED_SOURCES $SHCXXFLAGS $SHCCFLAGS $_CCCOMCOM'
     env['CPPDEFPREFIX']  = '/D'
     env['CPPDEFSUFFIX']  = ''
     env['INCPREFIX']  = '/I'