From: "Shi, Steven" <steven....@intel.com>

BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=1927

Current cache hash algorithm does not parse and generate
the makefile to get the accurate dependency files for a
module. It instead use the platform and package meta files
to get the module depenedency in a quick but over approximate
way. These meta files are monolithic and involve many redundant
dependency for the module, which cause the module build
cache miss easily.
This patch introduces one more cache checkpoint and a new
hash algorithm besides the current quick one. The new hash
algorithm leverages the module makefile to achieve more
accurate and precise dependency info for a module. When
the build cache miss with the first quick hash, the
Basetool will caculate new one after makefile is generated
and then check again.

Cc: Liming Gao <liming....@intel.com>
Cc: Bob Feng <bob.c.f...@intel.com>
Signed-off-by: Steven Shi <steven....@intel.com>
---
 BaseTools/Source/Python/AutoGen/AutoGenWorker.py |  21 +++++++++++++++++++++
 BaseTools/Source/Python/AutoGen/CacheIR.py       |  28 
++++++++++++++++++++++++++++
 BaseTools/Source/Python/AutoGen/DataPipe.py      |   8 ++++++++
 BaseTools/Source/Python/AutoGen/GenMake.py       | 223 
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-------------------------------------------------------------------------------------------------------------
 BaseTools/Source/Python/AutoGen/ModuleAutoGen.py | 640 
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++---------------------------------------------------------
 BaseTools/Source/Python/Common/GlobalData.py     |   9 +++++++++
 BaseTools/Source/Python/build/build.py           | 128 
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++----------------------------
 7 files changed, 863 insertions(+), 194 deletions(-)

diff --git a/BaseTools/Source/Python/AutoGen/AutoGenWorker.py 
b/BaseTools/Source/Python/AutoGen/AutoGenWorker.py
old mode 100644
new mode 100755
index e583828741..a84ed46f2e
--- a/BaseTools/Source/Python/AutoGen/AutoGenWorker.py
+++ b/BaseTools/Source/Python/AutoGen/AutoGenWorker.py
@@ -182,6 +182,12 @@ class AutoGenWorkerInProcess(mp.Process):
             GlobalData.gDisableIncludePathCheck = False
             GlobalData.gFdfParser = self.data_pipe.Get("FdfParser")
             GlobalData.gDatabasePath = self.data_pipe.Get("DatabasePath")
+            GlobalData.gBinCacheSource = self.data_pipe.Get("BinCacheSource")
+            GlobalData.gBinCacheDest = self.data_pipe.Get("BinCacheDest")
+            GlobalData.gCacheIR = self.data_pipe.Get("CacheIR")
+            GlobalData.gEnableGenfdsMultiThread = 
self.data_pipe.Get("EnableGenfdsMultiThread")
+            GlobalData.file_lock = self.file_lock
+            CommandTarget = self.data_pipe.Get("CommandTarget")
             pcd_from_build_option = []
             for pcd_tuple in self.data_pipe.Get("BuildOptPcd"):
                 pcd_id = ".".join((pcd_tuple[0],pcd_tuple[1]))
@@ -193,10 +199,13 @@ class AutoGenWorkerInProcess(mp.Process):
             FfsCmd = self.data_pipe.Get("FfsCommand")
             if FfsCmd is None:
                 FfsCmd = {}
+            GlobalData.FfsCmd = FfsCmd
             PlatformMetaFile = 
self.GetPlatformMetaFile(self.data_pipe.Get("P_Info").get("ActivePlatform"),
                                              
self.data_pipe.Get("P_Info").get("WorkspaceDir"))
             libConstPcd = self.data_pipe.Get("LibConstPcd")
             Refes = self.data_pipe.Get("REFS")
+            GlobalData.libConstPcd = libConstPcd
+            GlobalData.Refes = Refes
             while True:
                 if self.module_queue.empty():
                     break
@@ -223,8 +232,20 @@ class AutoGenWorkerInProcess(mp.Process):
                         Ma.ConstPcd = 
libConstPcd[(Ma.MetaFile.File,Ma.MetaFile.Root,Ma.Arch,Ma.MetaFile.Path)]
                     if 
(Ma.MetaFile.File,Ma.MetaFile.Root,Ma.Arch,Ma.MetaFile.Path) in Refes:
                         Ma.ReferenceModules = 
Refes[(Ma.MetaFile.File,Ma.MetaFile.Root,Ma.Arch,Ma.MetaFile.Path)]
+                if GlobalData.gBinCacheSource and CommandTarget in [None, "", 
"all"]:
+                    Ma.GenModuleFilesHash(GlobalData.gCacheIR)
+                    Ma.GenPreMakefileHash(GlobalData.gCacheIR)
+                    if Ma.CanSkipbyPreMakefileCache(GlobalData.gCacheIR):
+                       continue
+
                 Ma.CreateCodeFile(False)
                 
Ma.CreateMakeFile(False,GenFfsList=FfsCmd.get((Ma.MetaFile.File, Ma.Arch),[]))
+
+                if GlobalData.gBinCacheSource and CommandTarget in [None, "", 
"all"]:
+                    Ma.GenMakeHeaderFilesHash(GlobalData.gCacheIR)
+                    Ma.GenMakeHash(GlobalData.gCacheIR)
+                    if Ma.CanSkipbyMakeCache(GlobalData.gCacheIR):
+                        continue
         except Empty:
             pass
         except:
diff --git a/BaseTools/Source/Python/AutoGen/CacheIR.py 
b/BaseTools/Source/Python/AutoGen/CacheIR.py
new file mode 100755
index 0000000000..2d9ffe3f0b
--- /dev/null
+++ b/BaseTools/Source/Python/AutoGen/CacheIR.py
@@ -0,0 +1,28 @@
+## @file
+# Build cache intermediate result and state
+#
+# Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+
+class ModuleBuildCacheIR():
+    def __init__(self, Path, Arch):
+        self.ModulePath = Path
+        self.ModuleArch = Arch
+        self.ModuleFilesHashDigest = None
+        self.ModuleFilesHashHexDigest = None
+        self.ModuleFilesChain = []
+        self.PreMakefileHashHexDigest = None
+        self.CreateCodeFileDone = False
+        self.CreateMakeFileDone = False
+        self.MakefilePath = None
+        self.AutoGenFileList = None
+        self.DependencyHeaderFileSet = None
+        self.MakeHeaderFilesHashChain = None
+        self.MakeHeaderFilesHashDigest = None
+        self.MakeHeaderFilesHashChain = []
+        self.MakeHashDigest = None
+        self.MakeHashHexDigest = None
+        self.MakeHashChain = []
+        self.PreMakeCacheHit = False
+        self.MakeCacheHit = False
diff --git a/BaseTools/Source/Python/AutoGen/DataPipe.py 
b/BaseTools/Source/Python/AutoGen/DataPipe.py
old mode 100644
new mode 100755
index 2052084bdb..84e77c301a
--- a/BaseTools/Source/Python/AutoGen/DataPipe.py
+++ b/BaseTools/Source/Python/AutoGen/DataPipe.py
@@ -158,3 +158,11 @@ class MemoryDataPipe(DataPipe):
         self.DataContainer = {"FdfParser": True if GlobalData.gFdfParser else 
False}
 
         self.DataContainer = {"LogLevel": EdkLogger.GetLevel()}
+
+        self.DataContainer = {"BinCacheSource":GlobalData.gBinCacheSource}
+
+        self.DataContainer = {"BinCacheDest":GlobalData.gBinCacheDest}
+
+        self.DataContainer = {"CacheIR":GlobalData.gCacheIR}
+
+        self.DataContainer = 
{"EnableGenfdsMultiThread":GlobalData.gEnableGenfdsMultiThread}
\ No newline at end of file
diff --git a/BaseTools/Source/Python/AutoGen/GenMake.py 
b/BaseTools/Source/Python/AutoGen/GenMake.py
old mode 100644
new mode 100755
index 5802ae5ae4..79387856bd
--- a/BaseTools/Source/Python/AutoGen/GenMake.py
+++ b/BaseTools/Source/Python/AutoGen/GenMake.py
@@ -906,6 +906,11 @@ cleanlib:
                                     self._AutoGenObject.IncludePathList + 
self._AutoGenObject.BuildOptionIncPathList
                                     )
 
+        self.DependencyHeaderFileSet = set()
+        if FileDependencyDict:
+            for Dependency in FileDependencyDict.values():
+                self.DependencyHeaderFileSet.update(set(Dependency))
+
         # Check if header files are listed in metafile
         # Get a list of unique module header source files from MetaFile
         headerFilesInMetaFileSet = set()
@@ -1096,7 +1101,7 @@ cleanlib:
     ## For creating makefile targets for dependent libraries
     def ProcessDependentLibrary(self):
         for LibraryAutoGen in self._AutoGenObject.LibraryAutoGenList:
-            if not LibraryAutoGen.IsBinaryModule and not 
LibraryAutoGen.CanSkipbyHash():
+            if not LibraryAutoGen.IsBinaryModule:
                 
self.LibraryBuildDirectoryList.append(self.PlaceMacro(LibraryAutoGen.BuildDir, 
self.Macros))
 
     ## Return a list containing source file's dependencies
@@ -1110,114 +1115,9 @@ cleanlib:
     def GetFileDependency(self, FileList, ForceInculeList, SearchPathList):
         Dependency = {}
         for F in FileList:
-            Dependency[F] = self.GetDependencyList(F, ForceInculeList, 
SearchPathList)
+            Dependency[F] = GetDependencyList(self._AutoGenObject, 
self.FileCache, F, ForceInculeList, SearchPathList)
         return Dependency
 
-    ## Find dependencies for one source file
-    #
-    #  By searching recursively "#include" directive in file, find out all the
-    #  files needed by given source file. The dependencies will be only 
searched
-    #  in given search path list.
-    #
-    #   @param      File            The source file
-    #   @param      ForceInculeList The list of files which will be included 
forcely
-    #   @param      SearchPathList  The list of search path
-    #
-    #   @retval     list            The list of files the given source file 
depends on
-    #
-    def GetDependencyList(self, File, ForceList, SearchPathList):
-        EdkLogger.debug(EdkLogger.DEBUG_1, "Try to get dependency files for 
%s" % File)
-        FileStack = [File] + ForceList
-        DependencySet = set()
-
-        if self._AutoGenObject.Arch not in gDependencyDatabase:
-            gDependencyDatabase[self._AutoGenObject.Arch] = {}
-        DepDb = gDependencyDatabase[self._AutoGenObject.Arch]
-
-        while len(FileStack) > 0:
-            F = FileStack.pop()
-
-            FullPathDependList = []
-            if F in self.FileCache:
-                for CacheFile in self.FileCache[F]:
-                    FullPathDependList.append(CacheFile)
-                    if CacheFile not in DependencySet:
-                        FileStack.append(CacheFile)
-                DependencySet.update(FullPathDependList)
-                continue
-
-            CurrentFileDependencyList = []
-            if F in DepDb:
-                CurrentFileDependencyList = DepDb[F]
-            else:
-                try:
-                    Fd = open(F.Path, 'rb')
-                    FileContent = Fd.read()
-                    Fd.close()
-                except BaseException as X:
-                    EdkLogger.error("build", FILE_OPEN_FAILURE, 
ExtraData=F.Path + "\n\t" + str(X))
-                if len(FileContent) == 0:
-                    continue
-                try:
-                    if FileContent[0] == 0xff or FileContent[0] == 0xfe:
-                        FileContent = FileContent.decode('utf-16')
-                    else:
-                        FileContent = FileContent.decode()
-                except:
-                    # The file is not txt file. for example .mcb file
-                    continue
-                IncludedFileList = gIncludePattern.findall(FileContent)
-
-                for Inc in IncludedFileList:
-                    Inc = Inc.strip()
-                    # if there's macro used to reference header file, expand it
-                    HeaderList = gMacroPattern.findall(Inc)
-                    if len(HeaderList) == 1 and len(HeaderList[0]) == 2:
-                        HeaderType = HeaderList[0][0]
-                        HeaderKey = HeaderList[0][1]
-                        if HeaderType in gIncludeMacroConversion:
-                            Inc = gIncludeMacroConversion[HeaderType] % 
{"HeaderKey" : HeaderKey}
-                        else:
-                            # not known macro used in #include, always build 
the file by
-                            # returning a empty dependency
-                            self.FileCache[File] = []
-                            return []
-                    Inc = os.path.normpath(Inc)
-                    CurrentFileDependencyList.append(Inc)
-                DepDb[F] = CurrentFileDependencyList
-
-            CurrentFilePath = F.Dir
-            PathList = [CurrentFilePath] + SearchPathList
-            for Inc in CurrentFileDependencyList:
-                for SearchPath in PathList:
-                    FilePath = os.path.join(SearchPath, Inc)
-                    if FilePath in gIsFileMap:
-                        if not gIsFileMap[FilePath]:
-                            continue
-                    # If isfile is called too many times, the performance is 
slow down.
-                    elif not os.path.isfile(FilePath):
-                        gIsFileMap[FilePath] = False
-                        continue
-                    else:
-                        gIsFileMap[FilePath] = True
-                    FilePath = PathClass(FilePath)
-                    FullPathDependList.append(FilePath)
-                    if FilePath not in DependencySet:
-                        FileStack.append(FilePath)
-                    break
-                else:
-                    EdkLogger.debug(EdkLogger.DEBUG_9, "%s included by %s was 
not found "\
-                                    "in any given path:\n\t%s" % (Inc, F, 
"\n\t".join(SearchPathList)))
-
-            self.FileCache[F] = FullPathDependList
-            DependencySet.update(FullPathDependList)
-
-        DependencySet.update(ForceList)
-        if File in DependencySet:
-            DependencySet.remove(File)
-        DependencyList = list(DependencySet)  # remove duplicate ones
-
-        return DependencyList
 
 ## CustomMakefile class
 #
@@ -1599,7 +1499,7 @@ cleanlib:
     def GetLibraryBuildDirectoryList(self):
         DirList = []
         for LibraryAutoGen in self._AutoGenObject.LibraryAutoGenList:
-            if not LibraryAutoGen.IsBinaryModule and not 
LibraryAutoGen.CanSkipbyHash():
+            if not LibraryAutoGen.IsBinaryModule:
                 DirList.append(os.path.join(self._AutoGenObject.BuildDir, 
LibraryAutoGen.BuildDir))
         return DirList
 
@@ -1735,7 +1635,7 @@ class TopLevelMakefile(BuildFile):
     def GetLibraryBuildDirectoryList(self):
         DirList = []
         for LibraryAutoGen in self._AutoGenObject.LibraryAutoGenList:
-            if not LibraryAutoGen.IsBinaryModule and not 
LibraryAutoGen.CanSkipbyHash():
+            if not LibraryAutoGen.IsBinaryModule:
                 DirList.append(os.path.join(self._AutoGenObject.BuildDir, 
LibraryAutoGen.BuildDir))
         return DirList
 
@@ -1743,3 +1643,108 @@ class TopLevelMakefile(BuildFile):
 if __name__ == '__main__':
     pass
 
+## Find dependencies for one source file
+#
+#  By searching recursively "#include" directive in file, find out all the
+#  files needed by given source file. The dependencies will be only searched
+#  in given search path list.
+#
+#   @param      File            The source file
+#   @param      ForceInculeList The list of files which will be included 
forcely
+#   @param      SearchPathList  The list of search path
+#
+#   @retval     list            The list of files the given source file 
depends on
+#
+def GetDependencyList(AutoGenObject, FileCache, File, ForceList, 
SearchPathList):
+    EdkLogger.debug(EdkLogger.DEBUG_1, "Try to get dependency files for %s" % 
File)
+    FileStack = [File] + ForceList
+    DependencySet = set()
+
+    if AutoGenObject.Arch not in gDependencyDatabase:
+        gDependencyDatabase[AutoGenObject.Arch] = {}
+    DepDb = gDependencyDatabase[AutoGenObject.Arch]
+
+    while len(FileStack) > 0:
+        F = FileStack.pop()
+
+        FullPathDependList = []
+        if F in FileCache:
+            for CacheFile in FileCache[F]:
+                FullPathDependList.append(CacheFile)
+                if CacheFile not in DependencySet:
+                    FileStack.append(CacheFile)
+            DependencySet.update(FullPathDependList)
+            continue
+
+        CurrentFileDependencyList = []
+        if F in DepDb:
+            CurrentFileDependencyList = DepDb[F]
+        else:
+            try:
+                Fd = open(F.Path, 'rb')
+                FileContent = Fd.read()
+                Fd.close()
+            except BaseException as X:
+                EdkLogger.error("build", FILE_OPEN_FAILURE, ExtraData=F.Path + 
"\n\t" + str(X))
+            if len(FileContent) == 0:
+                continue
+            try:
+                if FileContent[0] == 0xff or FileContent[0] == 0xfe:
+                    FileContent = FileContent.decode('utf-16')
+                else:
+                    FileContent = FileContent.decode()
+            except:
+                # The file is not txt file. for example .mcb file
+                continue
+            IncludedFileList = gIncludePattern.findall(FileContent)
+
+            for Inc in IncludedFileList:
+                Inc = Inc.strip()
+                # if there's macro used to reference header file, expand it
+                HeaderList = gMacroPattern.findall(Inc)
+                if len(HeaderList) == 1 and len(HeaderList[0]) == 2:
+                    HeaderType = HeaderList[0][0]
+                    HeaderKey = HeaderList[0][1]
+                    if HeaderType in gIncludeMacroConversion:
+                        Inc = gIncludeMacroConversion[HeaderType] % 
{"HeaderKey" : HeaderKey}
+                    else:
+                        # not known macro used in #include, always build the 
file by
+                        # returning a empty dependency
+                        FileCache[File] = []
+                        return []
+                Inc = os.path.normpath(Inc)
+                CurrentFileDependencyList.append(Inc)
+            DepDb[F] = CurrentFileDependencyList
+
+        CurrentFilePath = F.Dir
+        PathList = [CurrentFilePath] + SearchPathList
+        for Inc in CurrentFileDependencyList:
+            for SearchPath in PathList:
+                FilePath = os.path.join(SearchPath, Inc)
+                if FilePath in gIsFileMap:
+                    if not gIsFileMap[FilePath]:
+                        continue
+                # If isfile is called too many times, the performance is slow 
down.
+                elif not os.path.isfile(FilePath):
+                    gIsFileMap[FilePath] = False
+                    continue
+                else:
+                    gIsFileMap[FilePath] = True
+                FilePath = PathClass(FilePath)
+                FullPathDependList.append(FilePath)
+                if FilePath not in DependencySet:
+                    FileStack.append(FilePath)
+                break
+            else:
+                EdkLogger.debug(EdkLogger.DEBUG_9, "%s included by %s was not 
found "\
+                                "in any given path:\n\t%s" % (Inc, F, 
"\n\t".join(SearchPathList)))
+
+        FileCache[F] = FullPathDependList
+        DependencySet.update(FullPathDependList)
+
+    DependencySet.update(ForceList)
+    if File in DependencySet:
+        DependencySet.remove(File)
+    DependencyList = list(DependencySet)  # remove duplicate ones
+
+    return DependencyList
\ No newline at end of file
diff --git a/BaseTools/Source/Python/AutoGen/ModuleAutoGen.py 
b/BaseTools/Source/Python/AutoGen/ModuleAutoGen.py
old mode 100644
new mode 100755
index ed6822334e..6cb7cae1c7
--- a/BaseTools/Source/Python/AutoGen/ModuleAutoGen.py
+++ b/BaseTools/Source/Python/AutoGen/ModuleAutoGen.py
@@ -26,6 +26,8 @@ from Workspace.MetaFileCommentParser import UsageList
 from .GenPcdDb import CreatePcdDatabaseCode
 from Common.caching import cached_class_function
 from AutoGen.ModuleAutoGenHelper import PlatformInfo,WorkSpaceInfo
+from AutoGen.CacheIR import ModuleBuildCacheIR
+import json
 
 ## Mapping Makefile type
 gMakeTypeMap = {TAB_COMPILER_MSFT:"nmake", "GCC":"gmake"}
@@ -252,6 +254,8 @@ class ModuleAutoGen(AutoGen):
         self.AutoGenDepSet = set()
         self.ReferenceModules = []
         self.ConstPcd                  = {}
+        self.Makefile         = None
+        self.FileDependCache  = {}
 
     def __init_platform_info__(self):
         pinfo = self.DataPipe.Get("P_Info")
@@ -1594,12 +1598,37 @@ class ModuleAutoGen(AutoGen):
 
         self.IsAsBuiltInfCreated = True
 
+    def CacheCopyFile(self, OriginDir, CopyDir, File):
+        sub_dir = os.path.relpath(File, CopyDir)
+        destination_file = os.path.join(OriginDir, sub_dir)
+        destination_dir = os.path.dirname(destination_file)
+        CreateDirectory(destination_dir)
+        try:
+            CopyFileOnChange(File, destination_dir)
+        except:
+            EdkLogger.quiet("[cache warning]: fail to copy file:%s to 
folder:%s" % (File, destination_dir))
+            return
+
     def CopyModuleToCache(self):
-        FileDir = path.join(GlobalData.gBinCacheDest, self.PlatformInfo.Name, 
self.BuildTarget + "_" + self.ToolChain, self.Arch, self.SourceDir, 
self.MetaFile.BaseName)
+        self.GenPreMakefileHash(GlobalData.gCacheIR)
+        if not (self.MetaFile.Path, self.Arch) in GlobalData.gCacheIR or \
+           not GlobalData.gCacheIR[(self.MetaFile.Path, 
self.Arch)].PreMakefileHashHexDigest:
+            EdkLogger.quiet("[cache warning]: Cannot generate PreMakefileHash 
for module: %s[%s]" % (self.MetaFile.Path, self.Arch))
+            return False
+
+        self.GenMakeHash(GlobalData.gCacheIR)
+        if not (self.MetaFile.Path, self.Arch) in GlobalData.gCacheIR or \
+           not GlobalData.gCacheIR[(self.MetaFile.Path, 
self.Arch)].MakeHashChain or \
+           not GlobalData.gCacheIR[(self.MetaFile.Path, 
self.Arch)].MakeHashHexDigest:
+            EdkLogger.quiet("[cache warning]: Cannot generate MakeHashChain 
for module: %s[%s]" % (self.MetaFile.Path, self.Arch))
+            return False
+
+        MakeHashStr = str(GlobalData.gCacheIR[(self.MetaFile.Path, 
self.Arch)].MakeHashHexDigest)
+        FileDir = path.join(GlobalData.gBinCacheDest, 
self.PlatformInfo.OutputDir, self.BuildTarget + "_" + self.ToolChain, 
self.Arch, self.SourceDir, self.MetaFile.BaseName, MakeHashStr)
+        FfsDir = path.join(GlobalData.gBinCacheDest, 
self.PlatformInfo.OutputDir, self.BuildTarget + "_" + self.ToolChain, 
TAB_FV_DIRECTORY, "Ffs", self.Guid + self.Name, MakeHashStr)
+
         CreateDirectory (FileDir)
-        HashFile = path.join(self.BuildDir, self.Name + '.hash')
-        if os.path.exists(HashFile):
-            CopyFileOnChange(HashFile, FileDir)
+        self.SaveHashChainFileToCache(GlobalData.gCacheIR)
         ModuleFile = path.join(self.OutputDir, self.Name + '.inf')
         if os.path.exists(ModuleFile):
             CopyFileOnChange(ModuleFile, FileDir)
@@ -1617,38 +1646,73 @@ class ModuleAutoGen(AutoGen):
                 CreateDirectory(destination_dir)
                 CopyFileOnChange(File, destination_dir)
 
-    def AttemptModuleCacheCopy(self):
-        # If library or Module is binary do not skip by hash
-        if self.IsBinaryModule:
+    def SaveHashChainFileToCache(self, gDict):
+        if not GlobalData.gBinCacheDest:
+            return False
+
+        self.GenPreMakefileHash(gDict)
+        if not (self.MetaFile.Path, self.Arch) in gDict or \
+           not gDict[(self.MetaFile.Path, self.Arch)].PreMakefileHashHexDigest:
+            EdkLogger.quiet("[cache warning]: Cannot generate PreMakefileHash 
for module: %s[%s]" % (self.MetaFile.Path, self.Arch))
+            return False
+
+        self.GenMakeHash(gDict)
+        if not (self.MetaFile.Path, self.Arch) in gDict or \
+           not gDict[(self.MetaFile.Path, self.Arch)].MakeHashChain or \
+           not gDict[(self.MetaFile.Path, self.Arch)].MakeHashHexDigest:
+            EdkLogger.quiet("[cache warning]: Cannot generate MakeHashChain 
for module: %s[%s]" % (self.MetaFile.Path, self.Arch))
             return False
-        # .inc is contains binary information so do not skip by hash as well
-        for f_ext in self.SourceFileList:
-            if '.inc' in str(f_ext):
-                return False
-        FileDir = path.join(GlobalData.gBinCacheSource, 
self.PlatformInfo.Name, self.BuildTarget + "_" + self.ToolChain, self.Arch, 
self.SourceDir, self.MetaFile.BaseName)
-        HashFile = path.join(FileDir, self.Name + '.hash')
-        if os.path.exists(HashFile):
-            f = open(HashFile, 'r')
-            CacheHash = f.read()
-            f.close()
-            self.GenModuleHash()
-            if GlobalData.gModuleHash[self.Arch][self.Name]:
-                if CacheHash == GlobalData.gModuleHash[self.Arch][self.Name]:
-                    for root, dir, files in os.walk(FileDir):
-                        for f in files:
-                            if self.Name + '.hash' in f:
-                                CopyFileOnChange(HashFile, self.BuildDir)
-                            else:
-                                File = path.join(root, f)
-                                sub_dir = os.path.relpath(File, FileDir)
-                                destination_file = 
os.path.join(self.OutputDir, sub_dir)
-                                destination_dir = 
os.path.dirname(destination_file)
-                                CreateDirectory(destination_dir)
-                                CopyFileOnChange(File, destination_dir)
-                    if self.Name == "PcdPeim" or self.Name == "PcdDxe":
-                        CreatePcdDatabaseCode(self, TemplateString(), 
TemplateString())
-                    return True
-        return False
+
+        # save the hash chain list as cache file
+        MakeHashStr = str(GlobalData.gCacheIR[(self.MetaFile.Path, 
self.Arch)].MakeHashHexDigest)
+        CacheDestDir = path.join(GlobalData.gBinCacheDest, 
self.PlatformInfo.OutputDir, self.BuildTarget + "_" + self.ToolChain, 
self.Arch, self.SourceDir, self.MetaFile.BaseName)
+        CacheHashDestDir = path.join(CacheDestDir, MakeHashStr)
+        ModuleHashPair = path.join(CacheDestDir, self.Name + ".ModuleHashPair")
+        MakeHashChain = path.join(CacheHashDestDir, self.Name + 
".MakeHashChain")
+        ModuleFilesChain = path.join(CacheHashDestDir, self.Name + 
".ModuleFilesChain")
+
+        # save the HashChainDict as json file
+        CreateDirectory (CacheDestDir)
+        CreateDirectory (CacheHashDestDir)
+        try:
+            ModuleHashPairList = [] # tuple list: [tuple(PreMakefileHash, 
MakeHash)]
+            if os.path.exists(ModuleHashPair):
+                f = open(ModuleHashPair, 'r')
+                ModuleHashPairList = json.load(f)
+                f.close()
+            PreMakeHash = gDict[(self.MetaFile.Path, 
self.Arch)].PreMakefileHashHexDigest
+            MakeHash = gDict[(self.MetaFile.Path, self.Arch)].MakeHashHexDigest
+            ModuleHashPairList.append((PreMakeHash, MakeHash))
+            ModuleHashPairList = list(set(map(tuple, ModuleHashPairList)))
+            with open(ModuleHashPair, 'w') as f:
+                json.dump(ModuleHashPairList, f, indent=2)
+        except:
+            EdkLogger.quiet("[cache warning]: fail to save ModuleHashPair file 
in cache: %s" % ModuleHashPair)
+            return False
+
+        try:
+            with open(MakeHashChain, 'w') as f:
+                json.dump(gDict[(self.MetaFile.Path, 
self.Arch)].MakeHashChain, f, indent=2)
+        except:
+            EdkLogger.quiet("[cache warning]: fail to save MakeHashChain file 
in cache: %s" % MakeHashChain)
+            return False
+
+        try:
+            with open(ModuleFilesChain, 'w') as f:
+                json.dump(gDict[(self.MetaFile.Path, 
self.Arch)].ModuleFilesChain, f, indent=2)
+        except:
+            EdkLogger.quiet("[cache warning]: fail to save ModuleFilesChain 
file in cache: %s" % ModuleFilesChain)
+            return False
+
+        # save the autogenfile and makefile for debug usage
+        CacheDebugDir = path.join(CacheHashDestDir, "CacheDebug")
+        CreateDirectory (CacheDebugDir)
+        CopyFileOnChange(gDict[(self.MetaFile.Path, self.Arch)].MakefilePath, 
CacheDebugDir)
+        if gDict[(self.MetaFile.Path, self.Arch)].AutoGenFileList:
+            for File in gDict[(self.MetaFile.Path, self.Arch)].AutoGenFileList:
+                CopyFileOnChange(str(File), CacheDebugDir)
+
+        return True
 
     ## Create makefile for the module and its dependent libraries
     #
@@ -1657,6 +1721,11 @@ class ModuleAutoGen(AutoGen):
     #
     @cached_class_function
     def CreateMakeFile(self, CreateLibraryMakeFile=True, GenFfsList = []):
+        gDict = GlobalData.gCacheIR
+        if (self.MetaFile.Path, self.Arch) in gDict and \
+          gDict[(self.MetaFile.Path, self.Arch)].CreateMakeFileDone:
+            return
+
         # nest this function inside it's only caller.
         def CreateTimeStamp():
             FileSet = {self.MetaFile.Path}
@@ -1687,8 +1756,8 @@ class ModuleAutoGen(AutoGen):
             for LibraryAutoGen in self.LibraryAutoGenList:
                 LibraryAutoGen.CreateMakeFile()
 
-        # Don't enable if hash feature enabled, CanSkip uses timestamps to 
determine build skipping
-        if not GlobalData.gUseHashCache and self.CanSkip():
+        # CanSkip uses timestamps to determine build skipping
+        if self.CanSkip():
             return
 
         if len(self.CustomMakefile) == 0:
@@ -1704,6 +1773,24 @@ class ModuleAutoGen(AutoGen):
 
         CreateTimeStamp()
 
+        MakefileType = Makefile._FileType
+        MakefileName = Makefile._FILE_NAME_[MakefileType]
+        MakefilePath = os.path.join(self.MakeFileDir, MakefileName)
+
+        MewIR = ModuleBuildCacheIR(self.MetaFile.Path, self.Arch)
+        MewIR.MakefilePath = MakefilePath
+        MewIR.DependencyHeaderFileSet = Makefile.DependencyHeaderFileSet
+        MewIR.CreateMakeFileDone = True
+        with GlobalData.file_lock:
+            try:
+                IR = gDict[(self.MetaFile.Path, self.Arch)]
+                IR.MakefilePath = MakefilePath
+                IR.DependencyHeaderFileSet = Makefile.DependencyHeaderFileSet
+                IR.CreateMakeFileDone = True
+                gDict[(self.MetaFile.Path, self.Arch)] = IR
+            except:
+                gDict[(self.MetaFile.Path, self.Arch)] = MewIR
+
     def CopyBinaryFiles(self):
         for File in self.Module.Binaries:
             SrcPath = File.Path
@@ -1715,6 +1802,11 @@ class ModuleAutoGen(AutoGen):
     #                                       dependent libraries will be created
     #
     def CreateCodeFile(self, CreateLibraryCodeFile=True):
+        gDict = GlobalData.gCacheIR
+        if (self.MetaFile.Path, self.Arch) in gDict and \
+          gDict[(self.MetaFile.Path, self.Arch)].CreateCodeFileDone:
+            return
+
         if self.IsCodeFileCreated:
             return
 
@@ -1730,8 +1822,9 @@ class ModuleAutoGen(AutoGen):
         if not self.IsLibrary and CreateLibraryCodeFile:
             for LibraryAutoGen in self.LibraryAutoGenList:
                 LibraryAutoGen.CreateCodeFile()
-        # Don't enable if hash feature enabled, CanSkip uses timestamps to 
determine build skipping
-        if not GlobalData.gUseHashCache and self.CanSkip():
+
+        # CanSkip uses timestamps to determine build skipping
+        if self.CanSkip():
             return
 
         AutoGenList = []
@@ -1771,6 +1864,16 @@ class ModuleAutoGen(AutoGen):
                             (" ".join(AutoGenList), " 
".join(IgoredAutoGenList), self.Name, self.Arch))
 
         self.IsCodeFileCreated = True
+        MewIR = ModuleBuildCacheIR(self.MetaFile.Path, self.Arch)
+        MewIR.CreateCodeFileDone = True
+        with GlobalData.file_lock:
+            try:
+                IR = gDict[(self.MetaFile.Path, self.Arch)]
+                IR.CreateCodeFileDone = True
+                gDict[(self.MetaFile.Path, self.Arch)] = IR
+            except:
+                gDict[(self.MetaFile.Path, self.Arch)] = MewIR
+
         return AutoGenList
 
     ## Summarize the ModuleAutoGen objects of all libraries used by this module
@@ -1840,46 +1943,469 @@ class ModuleAutoGen(AutoGen):
 
         return GlobalData.gModuleHash[self.Arch][self.Name].encode('utf-8')
 
+    def GenModuleFilesHash(self, gDict):
+        # Early exit if module or library has been hashed and is in memory
+        if (self.MetaFile.Path, self.Arch) in gDict:
+            if gDict[(self.MetaFile.Path, self.Arch)].ModuleFilesChain:
+                return gDict[(self.MetaFile.Path, self.Arch)]
+
+        DependencyFileSet = set()
+        # Add Module Meta file
+        DependencyFileSet.add(self.MetaFile)
+
+        # Add Module's source files
+        if self.SourceFileList:
+            for File in set(self.SourceFileList):
+                DependencyFileSet.add(File)
+
+        # Add modules's include header files
+        # Search dependency file list for each source file
+        SourceFileList = []
+        OutPutFileList = []
+        for Target in self.IntroTargetList:
+            SourceFileList.extend(Target.Inputs)
+            OutPutFileList.extend(Target.Outputs)
+        if OutPutFileList:
+            for Item in OutPutFileList:
+                if Item in SourceFileList:
+                    SourceFileList.remove(Item)
+        SearchList = []
+        for file_path in self.IncludePathList + self.BuildOptionIncPathList:
+            # skip the folders in platform BuildDir which are not been 
generated yet
+            if 
file_path.startswith(os.path.abspath(self.PlatformInfo.BuildDir)+os.sep):
+                continue
+            SearchList.append(file_path)
+        FileDependencyDict = {}
+        ForceIncludedFile = []
+        for F in SourceFileList:
+            # skip the files which are not been generated yet, because
+            # the SourceFileList usually contains intermediate build files, 
e.g. AutoGen.c
+            if not os.path.exists(F.Path):
+                continue
+            FileDependencyDict[F] = GenMake.GetDependencyList(self, 
self.FileDependCache, F, ForceIncludedFile, SearchList)
+
+        if FileDependencyDict:
+            for Dependency in FileDependencyDict.values():
+                DependencyFileSet.update(set(Dependency))
+
+        # Caculate all above dependency files hash
+        # Initialze hash object
+        FileList = []
+        m = hashlib.md5()
+        for File in sorted(DependencyFileSet, key=lambda x: str(x)):
+            if not os.path.exists(str(File)):
+                EdkLogger.quiet("[cache warning]: header file %s is missing 
for module: %s[%s]" % (File, self.MetaFile.Path, self.Arch))
+                continue
+            f = open(str(File), 'rb')
+            Content = f.read()
+            f.close()
+            m.update(Content)
+            FileList.append((str(File), hashlib.md5(Content).hexdigest()))
+
+
+        MewIR = ModuleBuildCacheIR(self.MetaFile.Path, self.Arch)
+        MewIR.ModuleFilesHashDigest = m.digest()
+        MewIR.ModuleFilesHashHexDigest = m.hexdigest()
+        MewIR.ModuleFilesChain = FileList
+        with GlobalData.file_lock:
+            try:
+                IR = gDict[(self.MetaFile.Path, self.Arch)]
+                IR.ModuleFilesHashDigest = m.digest()
+                IR.ModuleFilesHashHexDigest = m.hexdigest()
+                IR.ModuleFilesChain = FileList
+                gDict[(self.MetaFile.Path, self.Arch)] = IR
+            except:
+                gDict[(self.MetaFile.Path, self.Arch)] = MewIR
+
+        return gDict[(self.MetaFile.Path, self.Arch)]
+
+    def GenPreMakefileHash(self, gDict):
+        # Early exit if module or library has been hashed and is in memory
+        if (self.MetaFile.Path, self.Arch) in gDict and \
+          gDict[(self.MetaFile.Path, self.Arch)].PreMakefileHashHexDigest:
+            return gDict[(self.MetaFile.Path, self.Arch)]
+
+        # skip binary module
+        if self.IsBinaryModule:
+            return
+
+        if not (self.MetaFile.Path, self.Arch) in gDict or \
+           not gDict[(self.MetaFile.Path, self.Arch)].ModuleFilesHashDigest:
+            self.GenModuleFilesHash(gDict)
+
+        if not (self.MetaFile.Path, self.Arch) in gDict or \
+           not gDict[(self.MetaFile.Path, self.Arch)].ModuleFilesHashDigest:
+           EdkLogger.quiet("[cache warning]: Cannot generate 
ModuleFilesHashDigest for module %s[%s]" %(self.MetaFile.Path, self.Arch))
+           return
+
+        # Initialze hash object
+        m = hashlib.md5()
+
+        # Add Platform level hash
+        if ('PlatformHash') in gDict:
+            m.update(gDict[('PlatformHash')].encode('utf-8'))
+        else:
+            EdkLogger.quiet("[cache warning]: PlatformHash is missing")
+
+        # Add Package level hash
+        if self.DependentPackageList:
+            for Pkg in sorted(self.DependentPackageList, key=lambda x: 
x.PackageName):
+                if (Pkg.PackageName, 'PackageHash') in gDict:
+                    m.update(gDict[(Pkg.PackageName, 
'PackageHash')].encode('utf-8'))
+                else:
+                    EdkLogger.quiet("[cache warning]: %s PackageHash needed by 
%s[%s] is missing" %(Pkg.PackageName, self.MetaFile.Name, self.Arch))
+
+        # Add Library hash
+        if self.LibraryAutoGenList:
+            for Lib in sorted(self.LibraryAutoGenList, key=lambda x: x.Name):
+                if not (Lib.MetaFile.Path, Lib.Arch) in gDict or \
+                   not gDict[(Lib.MetaFile.Path, 
Lib.Arch)].ModuleFilesHashDigest:
+                    Lib.GenPreMakefileHash(gDict)
+                m.update(gDict[(Lib.MetaFile.Path, 
Lib.Arch)].ModuleFilesHashDigest)
+
+        # Add Module self
+        m.update(gDict[(self.MetaFile.Path, self.Arch)].ModuleFilesHashDigest)
+
+        with GlobalData.file_lock:
+            IR = gDict[(self.MetaFile.Path, self.Arch)]
+            IR.PreMakefileHashHexDigest = m.hexdigest()
+            gDict[(self.MetaFile.Path, self.Arch)] = IR
+
+        return gDict[(self.MetaFile.Path, self.Arch)]
+
+    def GenMakeHeaderFilesHash(self, gDict):
+        # Early exit if module or library has been hashed and is in memory
+        if (self.MetaFile.Path, self.Arch) in gDict and \
+          gDict[(self.MetaFile.Path, self.Arch)].MakeHeaderFilesHashDigest:
+            return gDict[(self.MetaFile.Path, self.Arch)]
+
+        # skip binary module
+        if self.IsBinaryModule:
+            return
+
+        if not (self.MetaFile.Path, self.Arch) in gDict or \
+           not gDict[(self.MetaFile.Path, self.Arch)].CreateCodeFileDone:
+            if self.IsLibrary:
+                if 
(self.MetaFile.File,self.MetaFile.Root,self.Arch,self.MetaFile.Path) in 
GlobalData.libConstPcd:
+                    self.ConstPcd = 
GlobalData.libConstPcd[(self.MetaFile.File,self.MetaFile.Root,self.Arch,self.MetaFile.Path)]
+                if 
(self.MetaFile.File,self.MetaFile.Root,self.Arch,self.MetaFile.Path) in 
GlobalData.Refes:
+                    self.ReferenceModules = 
GlobalData.Refes[(self.MetaFile.File,self.MetaFile.Root,self.Arch,self.MetaFile.Path)]
+            self.CreateCodeFile()
+        if not (self.MetaFile.Path, self.Arch) in gDict or \
+           not gDict[(self.MetaFile.Path, self.Arch)].CreateMakeFileDone:
+            
self.CreateMakeFile(GenFfsList=GlobalData.FfsCmd.get((self.MetaFile.File, 
self.Arch),[]))
+
+        if not (self.MetaFile.Path, self.Arch) in gDict or \
+           not gDict[(self.MetaFile.Path, self.Arch)].CreateCodeFileDone or \
+           not gDict[(self.MetaFile.Path, self.Arch)].CreateMakeFileDone:
+           EdkLogger.quiet("[cache warning]: Cannot create CodeFile or 
Makefile for module %s[%s]" %(self.MetaFile.Path, self.Arch))
+           return
+
+        DependencyFileSet = set()
+        # Add Makefile
+        if gDict[(self.MetaFile.Path, self.Arch)].MakefilePath:
+            DependencyFileSet.add(gDict[(self.MetaFile.Path, 
self.Arch)].MakefilePath)
+        else:
+            EdkLogger.quiet("[cache warning]: makefile is missing for module 
%s[%s]" %(self.MetaFile.Path, self.Arch))
+
+        # Add header files
+        if gDict[(self.MetaFile.Path, self.Arch)].DependencyHeaderFileSet:
+            for File in gDict[(self.MetaFile.Path, 
self.Arch)].DependencyHeaderFileSet:
+                DependencyFileSet.add(File)
+        else:
+            EdkLogger.quiet("[cache warning]: No dependency header found for 
module %s[%s]" %(self.MetaFile.Path, self.Arch))
+
+        # Add AutoGen files
+        if self.AutoGenFileList:
+            for File in set(self.AutoGenFileList):
+                DependencyFileSet.add(File)
+
+        # Caculate all above dependency files hash
+        # Initialze hash object
+        FileList = []
+        m = hashlib.md5()
+        for File in sorted(DependencyFileSet, key=lambda x: str(x)):
+            if not os.path.exists(str(File)):
+                EdkLogger.quiet("[cache warning]: header file: %s doesn't 
exist for module: %s[%s]" % (File, self.MetaFile.Path, self.Arch))
+                continue
+            f = open(str(File), 'rb')
+            Content = f.read()
+            f.close()
+            m.update(Content)
+            FileList.append((str(File), hashlib.md5(Content).hexdigest()))
+
+        with GlobalData.file_lock:
+            IR = gDict[(self.MetaFile.Path, self.Arch)]
+            IR.AutoGenFileList = self.AutoGenFileList.keys()
+            IR.MakeHeaderFilesHashChain = FileList
+            IR.MakeHeaderFilesHashDigest = m.digest()
+            gDict[(self.MetaFile.Path, self.Arch)] = IR
+
+        return gDict[(self.MetaFile.Path, self.Arch)]
+
+    def GenMakeHash(self, gDict):
+        # Early exit if module or library has been hashed and is in memory
+        if (self.MetaFile.Path, self.Arch) in gDict and \
+          gDict[(self.MetaFile.Path, self.Arch)].MakeHashChain:
+            return gDict[(self.MetaFile.Path, self.Arch)]
+
+        # skip binary module
+        if self.IsBinaryModule:
+            return
+
+        if not (self.MetaFile.Path, self.Arch) in gDict or \
+           not gDict[(self.MetaFile.Path, self.Arch)].ModuleFilesHashDigest:
+            self.GenModuleFilesHash(gDict)
+        if not gDict[(self.MetaFile.Path, 
self.Arch)].MakeHeaderFilesHashDigest:
+            self.GenMakeHeaderFilesHash(gDict)
+
+        if not (self.MetaFile.Path, self.Arch) in gDict or \
+           not gDict[(self.MetaFile.Path, self.Arch)].ModuleFilesHashDigest or 
\
+           not gDict[(self.MetaFile.Path, self.Arch)].ModuleFilesChain or \
+           not gDict[(self.MetaFile.Path, 
self.Arch)].MakeHeaderFilesHashDigest or \
+           not gDict[(self.MetaFile.Path, self.Arch)].MakeHeaderFilesHashChain:
+           EdkLogger.quiet("[cache warning]: Cannot generate ModuleFilesHash 
or MakeHeaderFilesHash for module %s[%s]" %(self.MetaFile.Path, self.Arch))
+           return
+
+        # Initialze hash object
+        m = hashlib.md5()
+        MakeHashChain = []
+
+        # Add hash of makefile and dependency header files
+        m.update(gDict[(self.MetaFile.Path, 
self.Arch)].MakeHeaderFilesHashDigest)
+        New = list(set(gDict[(self.MetaFile.Path, 
self.Arch)].MakeHeaderFilesHashChain) - set(MakeHashChain))
+        New.sort(key=lambda x: str(x))
+        MakeHashChain += New
+
+        # Add Library hash
+        if self.LibraryAutoGenList:
+            for Lib in sorted(self.LibraryAutoGenList, key=lambda x: x.Name):
+                if not (Lib.MetaFile.Path, Lib.Arch) in gDict or \
+                   not gDict[(Lib.MetaFile.Path, Lib.Arch)].MakeHashChain:
+                    Lib.GenMakeHash(gDict)
+                if not gDict[(Lib.MetaFile.Path, Lib.Arch)].MakeHashDigest:
+                    print("Cannot generate MakeHash for lib module:", 
Lib.MetaFile.Path, Lib.Arch)
+                    continue
+                m.update(gDict[(Lib.MetaFile.Path, Lib.Arch)].MakeHashDigest)
+                New = list(set(gDict[(Lib.MetaFile.Path, 
Lib.Arch)].MakeHashChain) - set(MakeHashChain))
+                New.sort(key=lambda x: str(x))
+                MakeHashChain += New
+
+        # Add Module self
+        m.update(gDict[(self.MetaFile.Path, self.Arch)].ModuleFilesHashDigest)
+        New = list(set(gDict[(self.MetaFile.Path, 
self.Arch)].ModuleFilesChain) - set(MakeHashChain))
+        New.sort(key=lambda x: str(x))
+        MakeHashChain += New
+
+        with GlobalData.file_lock:
+            IR = gDict[(self.MetaFile.Path, self.Arch)]
+            IR.MakeHashDigest = m.digest()
+            IR.MakeHashHexDigest = m.hexdigest()
+            IR.MakeHashChain = MakeHashChain
+            gDict[(self.MetaFile.Path, self.Arch)] = IR
+
+        return gDict[(self.MetaFile.Path, self.Arch)]
+
+    ## Decide whether we can skip the left autogen and make process
+    def CanSkipbyPreMakefileCache(self, gDict):
+        if not GlobalData.gBinCacheSource:
+            return False
+
+        # If Module is binary, do not skip by cache
+        if self.IsBinaryModule:
+            return False
+
+        # .inc is contains binary information so do not skip by hash as well
+        for f_ext in self.SourceFileList:
+            if '.inc' in str(f_ext):
+                return False
+
+        # Get the module hash values from stored cache and currrent build
+        # then check whether cache hit based on the hash values
+        # if cache hit, restore all the files from cache
+        FileDir = path.join(GlobalData.gBinCacheSource, 
self.PlatformInfo.OutputDir, self.BuildTarget + "_" + self.ToolChain, 
self.Arch, self.SourceDir, self.MetaFile.BaseName)
+        FfsDir = path.join(GlobalData.gBinCacheSource, 
self.PlatformInfo.OutputDir, self.BuildTarget + "_" + self.ToolChain, 
TAB_FV_DIRECTORY, "Ffs", self.Guid + self.Name)
+
+        ModuleHashPairList = [] # tuple list: [tuple(PreMakefileHash, 
MakeHash)]
+        ModuleHashPair = path.join(FileDir, self.Name + ".ModuleHashPair")
+        if not os.path.exists(ModuleHashPair):
+            EdkLogger.quiet("[cache warning]: Cannot find ModuleHashPair file: 
%s" % ModuleHashPair)
+            return False
+
+        try:
+            f = open(ModuleHashPair, 'r')
+            ModuleHashPairList = json.load(f)
+            f.close()
+        except:
+            EdkLogger.quiet("[cache warning]: fail to load ModuleHashPair 
file: %s" % ModuleHashPair)
+            return False
+
+        self.GenPreMakefileHash(gDict)
+        if not (self.MetaFile.Path, self.Arch) in gDict or \
+           not gDict[(self.MetaFile.Path, self.Arch)].PreMakefileHashHexDigest:
+            EdkLogger.quiet("[cache warning]: PreMakefileHashHexDigest is 
missing for module %s[%s]" %(self.MetaFile.Path, self.Arch))
+            return False
+
+        MakeHashStr = None
+        CurrentPreMakeHash = gDict[(self.MetaFile.Path, 
self.Arch)].PreMakefileHashHexDigest
+        for idx, (PreMakefileHash, MakeHash) in enumerate (ModuleHashPairList):
+            if PreMakefileHash == CurrentPreMakeHash:
+                MakeHashStr = str(MakeHash)
+
+        if not MakeHashStr:
+            return False
+
+        TargetHashDir = path.join(FileDir, MakeHashStr)
+        TargetFfsHashDir = path.join(FfsDir, MakeHashStr)
+
+        if not os.path.exists(TargetHashDir):
+            EdkLogger.quiet("[cache warning]: Cache folder is missing: %s" % 
TargetHashDir)
+            return False
+
+        for root, dir, files in os.walk(TargetHashDir):
+            for f in files:
+                File = path.join(root, f)
+                self.CacheCopyFile(self.OutputDir, TargetHashDir, File)
+        if os.path.exists(TargetFfsHashDir):
+            for root, dir, files in os.walk(TargetFfsHashDir):
+                for f in files:
+                    File = path.join(root, f)
+                    self.CacheCopyFile(self.FfsOutputDir, TargetFfsHashDir, 
File)
+
+        if self.Name == "PcdPeim" or self.Name == "PcdDxe":
+            CreatePcdDatabaseCode(self, TemplateString(), TemplateString())
+
+        with GlobalData.file_lock:
+            IR = gDict[(self.MetaFile.Path, self.Arch)]
+            IR.PreMakeCacheHit = True
+            gDict[(self.MetaFile.Path, self.Arch)] = IR
+        print("[cache hit]: checkpoint_PreMakefile:", self.MetaFile.Path, 
self.Arch)
+        #EdkLogger.quiet("cache hit: %s[%s]" % (self.MetaFile.Path, self.Arch))
+        return True
+
+    ## Decide whether we can skip the make process
+    def CanSkipbyMakeCache(self, gDict):
+        if not GlobalData.gBinCacheSource:
+            return False
+
+        # If Module is binary, do not skip by cache
+        if self.IsBinaryModule:
+            print("[cache miss]: checkpoint_Makefile: binary module:", 
self.MetaFile.Path, self.Arch)
+            return False
+
+        # .inc is contains binary information so do not skip by hash as well
+        for f_ext in self.SourceFileList:
+            if '.inc' in str(f_ext):
+                with GlobalData.file_lock:
+                    IR = gDict[(self.MetaFile.Path, self.Arch)]
+                    IR.MakeCacheHit = False
+                    gDict[(self.MetaFile.Path, self.Arch)] = IR
+                print("[cache miss]: checkpoint_Makefile: .inc module:", 
self.MetaFile.Path, self.Arch)
+                return False
+
+        # Get the module hash values from stored cache and currrent build
+        # then check whether cache hit based on the hash values
+        # if cache hit, restore all the files from cache
+        FileDir = path.join(GlobalData.gBinCacheSource, 
self.PlatformInfo.OutputDir, self.BuildTarget + "_" + self.ToolChain, 
self.Arch, self.SourceDir, self.MetaFile.BaseName)
+        FfsDir = path.join(GlobalData.gBinCacheSource, 
self.PlatformInfo.OutputDir, self.BuildTarget + "_" + self.ToolChain, 
TAB_FV_DIRECTORY, "Ffs", self.Guid + self.Name)
+
+        ModuleHashPairList = [] # tuple list: [tuple(PreMakefileHash, 
MakeHash)]
+        ModuleHashPair = path.join(FileDir, self.Name + ".ModuleHashPair")
+        if not os.path.exists(ModuleHashPair):
+            EdkLogger.quiet("[cache warning]: Cannot find ModuleHashPair file: 
%s" % ModuleHashPair)
+            return False
+
+        try:
+            f = open(ModuleHashPair, 'r')
+            ModuleHashPairList = json.load(f)
+            f.close()
+        except:
+            EdkLogger.quiet("[cache warning]: fail to load ModuleHashPair 
file: %s" % ModuleHashPair)
+            return False
+
+        self.GenMakeHash(gDict)
+        if not (self.MetaFile.Path, self.Arch) in gDict or \
+           not gDict[(self.MetaFile.Path, self.Arch)].MakeHashHexDigest:
+            EdkLogger.quiet("[cache warning]: MakeHashHexDigest is missing for 
module %s[%s]" %(self.MetaFile.Path, self.Arch))
+            return False
+
+        MakeHashStr = None
+        CurrentMakeHash = gDict[(self.MetaFile.Path, 
self.Arch)].MakeHashHexDigest
+        for idx, (PreMakefileHash, MakeHash) in enumerate (ModuleHashPairList):
+            if MakeHash == CurrentMakeHash:
+                MakeHashStr = str(MakeHash)
+
+        if not MakeHashStr:
+            print("[cache miss]: checkpoint_Makefile:", self.MetaFile.Path, 
self.Arch)
+            return False
+
+        TargetHashDir = path.join(FileDir, MakeHashStr)
+        TargetFfsHashDir = path.join(FfsDir, MakeHashStr)
+        if not os.path.exists(TargetHashDir):
+            EdkLogger.quiet("[cache warning]: Cache folder is missing: %s" % 
TargetHashDir)
+            return False
+
+        for root, dir, files in os.walk(TargetHashDir):
+            for f in files:
+                File = path.join(root, f)
+                self.CacheCopyFile(self.OutputDir, TargetHashDir, File)
+
+        if os.path.exists(TargetFfsHashDir):
+            for root, dir, files in os.walk(TargetFfsHashDir):
+                for f in files:
+                    File = path.join(root, f)
+                    self.CacheCopyFile(self.FfsOutputDir, TargetFfsHashDir, 
File)
+
+        if self.Name == "PcdPeim" or self.Name == "PcdDxe":
+            CreatePcdDatabaseCode(self, TemplateString(), TemplateString())
+        with GlobalData.file_lock:
+            IR = gDict[(self.MetaFile.Path, self.Arch)]
+            IR.MakeCacheHit = True
+            gDict[(self.MetaFile.Path, self.Arch)] = IR
+        print("[cache hit]: checkpoint_Makefile:", self.MetaFile.Path, 
self.Arch)
+        return True
+
     ## Decide whether we can skip the ModuleAutoGen process
-    def CanSkipbyHash(self):
+    def CanSkipbyCache(self, gDict):
         # Hashing feature is off
-        if not GlobalData.gUseHashCache:
+        if not GlobalData.gBinCacheSource:
             return False
 
-        # Initialize a dictionary for each arch type
-        if self.Arch not in GlobalData.gBuildHashSkipTracking:
-            GlobalData.gBuildHashSkipTracking[self.Arch] = dict()
+        if self in GlobalData.gBuildHashSkipTracking:
+            return GlobalData.gBuildHashSkipTracking[self]
 
         # If library or Module is binary do not skip by hash
         if self.IsBinaryModule:
+            GlobalData.gBuildHashSkipTracking[self] = False
             return False
 
         # .inc is contains binary information so do not skip by hash as well
         for f_ext in self.SourceFileList:
             if '.inc' in str(f_ext):
+                GlobalData.gBuildHashSkipTracking[self] = False
                 return False
 
-        # Use Cache, if exists and if Module has a copy in cache
-        if GlobalData.gBinCacheSource and self.AttemptModuleCacheCopy():
+        if not (self.MetaFile.Path, self.Arch) in gDict:
+            return False
+
+        if gDict[(self.MetaFile.Path, self.Arch)].PreMakeCacheHit:
+            GlobalData.gBuildHashSkipTracking[self] = True
             return True
 
-        # Early exit for libraries that haven't yet finished building
-        HashFile = path.join(self.BuildDir, self.Name + ".hash")
-        if self.IsLibrary and not os.path.exists(HashFile):
-            return False
+        if gDict[(self.MetaFile.Path, self.Arch)].MakeCacheHit:
+            GlobalData.gBuildHashSkipTracking[self] = True
+            return True
 
-        # Return a Boolean based on if can skip by hash, either from memory or 
from IO.
-        if self.Name not in GlobalData.gBuildHashSkipTracking[self.Arch]:
-            # If hashes are the same, SaveFileOnChange() will return False.
-            GlobalData.gBuildHashSkipTracking[self.Arch][self.Name] = not 
SaveFileOnChange(HashFile, self.GenModuleHash(), True)
-            return GlobalData.gBuildHashSkipTracking[self.Arch][self.Name]
-        else:
-            return GlobalData.gBuildHashSkipTracking[self.Arch][self.Name]
+        return False
 
     ## Decide whether we can skip the ModuleAutoGen process
     #  If any source file is newer than the module than we cannot skip
     #
     def CanSkip(self):
+        # Don't skip if cache feature enabled
+        if GlobalData.gUseHashCache or GlobalData.gBinCacheDest or 
GlobalData.gBinCacheSource:
+            return False
+
         if self.MakeFileDir in GlobalData.gSikpAutoGenCache:
             return True
         if not os.path.exists(self.TimeStampPath):
diff --git a/BaseTools/Source/Python/Common/GlobalData.py 
b/BaseTools/Source/Python/Common/GlobalData.py
old mode 100644
new mode 100755
index bd45a43728..df10814f04
--- a/BaseTools/Source/Python/Common/GlobalData.py
+++ b/BaseTools/Source/Python/Common/GlobalData.py
@@ -119,3 +119,12 @@ gModuleBuildTracking = dict()
 # Top Dict:     Key: Arch Type              Value: Dictionary
 # Second Dict:  Key: Module\Library Name    Value: True\False
 gBuildHashSkipTracking = dict()
+
+# Common dictionary to share module cache intermediate result and state
+gCacheIR = None
+# Common lock for the multiple process AutoGens
+file_lock = None
+# Common dictionary to share platform libraries' constant Pcd
+libConstPcd = None
+# Common dictionary to share platform libraries' reference info
+Refes = None
\ No newline at end of file
diff --git a/BaseTools/Source/Python/build/build.py 
b/BaseTools/Source/Python/build/build.py
old mode 100644
new mode 100755
index 4de3f43c27..a35a29b150
--- a/BaseTools/Source/Python/build/build.py
+++ b/BaseTools/Source/Python/build/build.py
@@ -595,7 +595,7 @@ class BuildTask:
     #
     def AddDependency(self, Dependency):
         for Dep in Dependency:
-            if not Dep.BuildObject.IsBinaryModule and not 
Dep.BuildObject.CanSkipbyHash():
+            if not Dep.BuildObject.IsBinaryModule and not 
Dep.BuildObject.CanSkipbyCache(GlobalData.gCacheIR):
                 self.DependencyList.append(BuildTask.New(Dep))    # BuildTask 
list
 
     ## The thread wrapper of LaunchCommand function
@@ -811,7 +811,7 @@ class Build():
         self.AutoGenMgr = None
         EdkLogger.info("")
         os.chdir(self.WorkspaceDir)
-        self.share_data = Manager().dict()
+        GlobalData.gCacheIR = Manager().dict()
         self.log_q = log_q
     def StartAutoGen(self,mqueue, DataPipe,SkipAutoGen,PcdMaList,share_data):
         try:
@@ -820,6 +820,13 @@ class Build():
             feedback_q = mp.Queue()
             file_lock = mp.Lock()
             error_event = mp.Event()
+            GlobalData.file_lock = file_lock
+            FfsCmd = DataPipe.Get("FfsCommand")
+            if FfsCmd is None:
+                FfsCmd = {}
+            GlobalData.FfsCmd = FfsCmd
+            GlobalData.libConstPcd = DataPipe.Get("LibConstPcd")
+            GlobalData.Refes = DataPipe.Get("REFS")
             auto_workers = 
[AutoGenWorkerInProcess(mqueue,DataPipe.dump_file,feedback_q,file_lock,share_data,self.log_q,error_event)
 for _ in range(self.ThreadNumber)]
             self.AutoGenMgr = 
AutoGenManager(auto_workers,feedback_q,error_event)
             self.AutoGenMgr.start()
@@ -827,14 +834,28 @@ class Build():
                 w.start()
             if PcdMaList is not None:
                 for PcdMa in PcdMaList:
+                    if GlobalData.gBinCacheSource and self.Target in [None, 
"", "all"]:
+                        PcdMa.GenModuleFilesHash(share_data)
+                        PcdMa.GenPreMakefileHash(share_data)
+                        if PcdMa.CanSkipbyPreMakefileCache(share_data):
+                           continue
+
                     PcdMa.CreateCodeFile(False)
                     PcdMa.CreateMakeFile(False,GenFfsList = 
DataPipe.Get("FfsCommand").get((PcdMa.MetaFile.File, PcdMa.Arch),[]))
 
+                    if GlobalData.gBinCacheSource and self.Target in [None, 
"", "all"]:
+                        PcdMa.GenMakeHeaderFilesHash(share_data)
+                        PcdMa.GenMakeHash(share_data)
+                        if PcdMa.CanSkipbyMakeCache(share_data):
+                            continue
+
             self.AutoGenMgr.join()
             rt = self.AutoGenMgr.Status
             return rt, 0
-        except Exception as e:
-            return False,e.errcode
+        except FatalError as e:
+            return False, e.args[0]
+        except:
+            return False, UNKNOWN_ERROR
 
     ## Load configuration
     #
@@ -1199,10 +1220,11 @@ class Build():
                 mqueue.put(m)
 
             AutoGenObject.DataPipe.DataContainer = {"FfsCommand":FfsCommand}
+            AutoGenObject.DataPipe.DataContainer = {"CommandTarget": 
self.Target}
             self.Progress.Start("Generating makefile and code")
             data_pipe_file = os.path.join(AutoGenObject.BuildDir, 
"GlobalVar_%s_%s.bin" % (str(AutoGenObject.Guid),AutoGenObject.Arch))
             AutoGenObject.DataPipe.dump(data_pipe_file)
-            autogen_rt, errorcode = self.StartAutoGen(mqueue, 
AutoGenObject.DataPipe, self.SkipAutoGen, PcdMaList,self.share_data)
+            autogen_rt,errorcode = self.StartAutoGen(mqueue, 
AutoGenObject.DataPipe, self.SkipAutoGen, PcdMaList, GlobalData.gCacheIR)
             self.Progress.Stop("done!")
             if not autogen_rt:
                 self.AutoGenMgr.TerminateWorkers()
@@ -1799,6 +1821,15 @@ class Build():
                 CmdListDict = None
                 if GlobalData.gEnableGenfdsMultiThread and self.Fdf:
                     CmdListDict = self._GenFfsCmd(Wa.ArchList)
+
+                # Add Platform and Package level hash in share_data for module 
hash calculation later
+                if GlobalData.gBinCacheSource or GlobalData.gBinCacheDest:
+                    GlobalData.gCacheIR[('PlatformHash')] = 
GlobalData.gPlatformHash
+                    for PkgName in GlobalData.gPackageHash.keys():
+                        GlobalData.gCacheIR[(PkgName, 'PackageHash')] = 
GlobalData.gPackageHash[PkgName]
+                GlobalData.file_lock = mp.Lock()
+                GlobalData.FfsCmd = CmdListDict
+
                 self.Progress.Stop("done!")
                 MaList = []
                 ExitFlag = threading.Event()
@@ -1808,20 +1839,23 @@ class Build():
                     AutoGenStart = time.time()
                     GlobalData.gGlobalDefines['ARCH'] = Arch
                     Pa = PlatformAutoGen(Wa, self.PlatformFile, BuildTarget, 
ToolChain, Arch)
+                    GlobalData.libConstPcd = Pa.DataPipe.Get("LibConstPcd")
+                    GlobalData.Refes = Pa.DataPipe.Get("REFS")
                     for Module in Pa.Platform.Modules:
                         if self.ModuleFile.Dir == Module.Dir and 
self.ModuleFile.Name == Module.Name:
                             Ma = ModuleAutoGen(Wa, Module, BuildTarget, 
ToolChain, Arch, self.PlatformFile,Pa.DataPipe)
                             if Ma is None:
                                 continue
                             MaList.append(Ma)
-                            if Ma.CanSkipbyHash():
-                                self.HashSkipModules.append(Ma)
-                                if GlobalData.gBinCacheSource:
-                                    EdkLogger.quiet("cache hit: %s[%s]" % 
(Ma.MetaFile.Path, Ma.Arch))
-                                continue
-                            else:
-                                if GlobalData.gBinCacheSource:
-                                    EdkLogger.quiet("cache miss: %s[%s]" % 
(Ma.MetaFile.Path, Ma.Arch))
+
+                            if GlobalData.gBinCacheSource and self.Target in 
[None, "", "all"]:
+                                Ma.GenModuleFilesHash(GlobalData.gCacheIR)
+                                Ma.GenPreMakefileHash(GlobalData.gCacheIR)
+                                if 
Ma.CanSkipbyPreMakefileCache(GlobalData.gCacheIR):
+                                   self.HashSkipModules.append(Ma)
+                                   EdkLogger.quiet("cache hit: %s[%s]" % 
(Ma.MetaFile.Path, Ma.Arch))
+                                   continue
+
                             # Not to auto-gen for targets 'clean', 'cleanlib', 
'cleanall', 'run', 'fds'
                             if self.Target not in ['clean', 'cleanlib', 
'cleanall', 'run', 'fds']:
                                 # for target which must generate AutoGen code 
and makefile
@@ -1841,6 +1875,18 @@ class Build():
                                     self.Progress.Stop("done!")
                                 if self.Target == "genmake":
                                     return True
+
+                                if GlobalData.gBinCacheSource and self.Target 
in [None, "", "all"]:
+                                    
Ma.GenMakeHeaderFilesHash(GlobalData.gCacheIR)
+                                    Ma.GenMakeHash(GlobalData.gCacheIR)
+                                    if 
Ma.CanSkipbyMakeCache(GlobalData.gCacheIR):
+                                        self.HashSkipModules.append(Ma)
+                                        EdkLogger.quiet("cache hit: %s[%s]" % 
(Ma.MetaFile.Path, Ma.Arch))
+                                        continue
+                                    else:
+                                        EdkLogger.quiet("cache miss: %s[%s]" % 
(Ma.MetaFile.Path, Ma.Arch))
+                                        
Ma.PrintFirstMakeCacheMissFile(GlobalData.gCacheIR)
+
                             self.BuildModules.append(Ma)
                             # Initialize all modules in tracking to 'FAIL'
                             if Ma.Arch not in GlobalData.gModuleBuildTracking:
@@ -1985,11 +2031,18 @@ class Build():
                 if GlobalData.gEnableGenfdsMultiThread and self.Fdf:
                     CmdListDict = self._GenFfsCmd(Wa.ArchList)
 
+                # Add Platform and Package level hash in share_data for module 
hash calculation later
+                if GlobalData.gBinCacheSource or GlobalData.gBinCacheDest:
+                    GlobalData.gCacheIR[('PlatformHash')] = 
GlobalData.gPlatformHash
+                    for PkgName in GlobalData.gPackageHash.keys():
+                        GlobalData.gCacheIR[(PkgName, 'PackageHash')] = 
GlobalData.gPackageHash[PkgName]
+
                 # multi-thread exit flag
                 ExitFlag = threading.Event()
                 ExitFlag.clear()
                 self.AutoGenTime += int(round((time.time() - 
WorkspaceAutoGenTime)))
                 self.BuildModules = []
+                TotalModules = []
                 for Arch in Wa.ArchList:
                     PcdMaList    = []
                     AutoGenStart = time.time()
@@ -2009,6 +2062,7 @@ class Build():
                             ModuleList.append(Inf)
                     Pa.DataPipe.DataContainer = {"FfsCommand":CmdListDict}
                     Pa.DataPipe.DataContainer = {"Workspace_timestamp": 
Wa._SrcTimeStamp}
+                    Pa.DataPipe.DataContainer = {"CommandTarget": self.Target}
                     for Module in ModuleList:
                         # Get ModuleAutoGen object to generate C code file and 
makefile
                         Ma = ModuleAutoGen(Wa, Module, BuildTarget, ToolChain, 
Arch, self.PlatformFile,Pa.DataPipe)
@@ -2019,19 +2073,7 @@ class Build():
                             Ma.PlatformInfo = Pa
                             Ma.Workspace = Wa
                             PcdMaList.append(Ma)
-                        if Ma.CanSkipbyHash():
-                            self.HashSkipModules.append(Ma)
-                            if GlobalData.gBinCacheSource:
-                                EdkLogger.quiet("cache hit: %s[%s]" % 
(Ma.MetaFile.Path, Ma.Arch))
-                            continue
-                        else:
-                            if GlobalData.gBinCacheSource:
-                                EdkLogger.quiet("cache miss: %s[%s]" % 
(Ma.MetaFile.Path, Ma.Arch))
-
-                        # Not to auto-gen for targets 'clean', 'cleanlib', 
'cleanall', 'run', 'fds'
-                            # for target which must generate AutoGen code and 
makefile
-
-                        self.BuildModules.append(Ma)
+                        TotalModules.append(Ma)
                         # Initialize all modules in tracking to 'FAIL'
                         if Ma.Arch not in GlobalData.gModuleBuildTracking:
                             GlobalData.gModuleBuildTracking[Ma.Arch] = dict()
@@ -2042,7 +2084,22 @@ class Build():
                         mqueue.put(m)
                     data_pipe_file = os.path.join(Pa.BuildDir, 
"GlobalVar_%s_%s.bin" % (str(Pa.Guid),Pa.Arch))
                     Pa.DataPipe.dump(data_pipe_file)
-                    autogen_rt, errorcode = self.StartAutoGen(mqueue, 
Pa.DataPipe, self.SkipAutoGen, PcdMaList,self.share_data)
+                    autogen_rt, errorcode = self.StartAutoGen(mqueue, 
Pa.DataPipe, self.SkipAutoGen, PcdMaList,  GlobalData.gCacheIR)
+
+                    # Skip cache hit modules
+                    if GlobalData.gBinCacheSource:
+                        for Ma in TotalModules:
+                            if (Ma.MetaFile.Path, Ma.Arch) in 
GlobalData.gCacheIR and \
+                                GlobalData.gCacheIR[(Ma.MetaFile.Path, 
Ma.Arch)].PreMakeCacheHit:
+                                    self.HashSkipModules.append(Ma)
+                                    continue
+                            if (Ma.MetaFile.Path, Ma.Arch) in 
GlobalData.gCacheIR and \
+                                GlobalData.gCacheIR[(Ma.MetaFile.Path, 
Ma.Arch)].MakeCacheHit:
+                                    self.HashSkipModules.append(Ma)
+                                    continue
+                            self.BuildModules.append(Ma)
+                    else:
+                        self.BuildModules.extend(TotalModules)
 
                     if not autogen_rt:
                         self.AutoGenMgr.TerminateWorkers()
@@ -2050,9 +2107,24 @@ class Build():
                         raise FatalError(errorcode)
                 self.AutoGenTime += int(round((time.time() - AutoGenStart)))
                 self.Progress.Stop("done!")
+
+                if GlobalData.gBinCacheSource:
+                    EdkLogger.quiet("Total cache hit driver num: %s, cache 
miss driver num: %s" % (len(set(self.HashSkipModules)), 
len(set(self.BuildModules))))
+                    CacheHitMa = set()
+                    CacheNotHitMa = set()
+                    for IR in GlobalData.gCacheIR.keys():
+                        if 'PlatformHash' in IR or 'PackageHash' in IR:
+                            continue
+                        if GlobalData.gCacheIR[IR].PreMakeCacheHit or 
GlobalData.gCacheIR[IR].MakeCacheHit:
+                            CacheHitMa.add(IR)
+                        else:
+                            # There might be binary module or module which has 
.inc files, not count for cache miss
+                            CacheNotHitMa.add(IR)
+                    EdkLogger.quiet("Total module num: %s, cache hit module 
num: %s" % (len(CacheHitMa)+len(CacheNotHitMa), len(CacheHitMa)))
+
                 for Arch in Wa.ArchList:
                     MakeStart = time.time()
-                    for Ma in self.BuildModules:
+                    for Ma in set(self.BuildModules):
                         # Generate build task for the module
                         if not Ma.IsBinaryModule:
                             Bt = BuildTask.New(ModuleMakeUnit(Ma, 
Pa.BuildCommand,self.Target))
-- 
2.17.1


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