[Patch] BaseTools: Support customized compiling command

["Bob Feng" <bob.c.feng@intel.com>]

BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=1737
User may add other commands before CC command from build_rule.txt
for specific purpose. It worked fine before commit 05217d210e.

This patch is going to fix the bug in commit 05217d210e to
support customized CC command.

Signed-off-by: Bob Feng <bob.c.feng@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
---
 BaseTools/Source/Python/AutoGen/GenMake.py | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/BaseTools/Source/Python/AutoGen/GenMake.py b/BaseTools/Source/Python/AutoGen/GenMake.py
index 7562dc68b3..0513807f4f 100644
--- a/BaseTools/Source/Python/AutoGen/GenMake.py
+++ b/BaseTools/Source/Python/AutoGen/GenMake.py
@@ -1022,11 +1022,11 @@ cleanlib:
                                 CmdCppDict[item.Target.SubDir].append(Path)
         if T.Commands:
             CommandList = T.Commands[:]
             for Item in CommandList[:]:
                 SingleCommandList = Item.split()
-                if len(SingleCommandList) > 0 and '$(CC)' in SingleCommandList[0]:
+                if len(SingleCommandList) > 0 and self.CheckCCCmd(SingleCommandList):
                     for Temp in SingleCommandList:
                         if Temp.startswith('/Fo'):
                             CmdSign = '%s%s' % (Temp.rsplit(TAB_SLASH, 1)[0], TAB_SLASH)
                             break
                     else: continue
@@ -1042,10 +1042,15 @@ cleanlib:
                         T.Commands[Index] = '%s\n\t%s' % (' \\\n\t'.join(Cpplist), CmdTargetDict[CmdSign])
                     else:
                         T.Commands.pop(Index)
         return T, CmdSumDict, CmdTargetDict, CmdCppDict
 
+    def CheckCCCmd(self, CommandList):
+        for cmd in CommandList:
+            if '$(CC)' in cmd:
+                return True
+        return False
     ## For creating makefile targets for dependent libraries
     def ProcessDependentLibrary(self):
         for LibraryAutoGen in self._AutoGenObject.LibraryAutoGenList:
             if not LibraryAutoGen.IsBinaryModule and not LibraryAutoGen.CanSkipbyHash():
                 self.LibraryBuildDirectoryList.append(self.PlaceMacro(LibraryAutoGen.BuildDir, self.Macros))
-- 
2.20.1.windows.1