[Patch 1/1] BaseTools: Fix a bug of genffs command generation

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

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=2221

The command used by multiple thread genffs feature in makefile
for testing if file exist is generated based on the toolchain family.
It should be based on the OS type.

Cc: Liming Gao <liming.gao@intel.com>
Signed-off-by: Bob Feng <bob.c.feng@intel.com>
---
 BaseTools/Source/Python/GenFds/GenFdsGlobalVariable.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/BaseTools/Source/Python/GenFds/GenFdsGlobalVariable.py b/BaseTools/Source/Python/GenFds/GenFdsGlobalVariable.py
index 4d8b2bdee299..bd97aa9dd208 100644
--- a/BaseTools/Source/Python/GenFds/GenFdsGlobalVariable.py
+++ b/BaseTools/Source/Python/GenFds/GenFdsGlobalVariable.py
@@ -11,10 +11,11 @@
 #
 from __future__ import print_function
 from __future__ import absolute_import
 
 import Common.LongFilePathOs as os
+import sys
 from sys import stdout
 from subprocess import PIPE,Popen
 from struct import Struct
 from array import array
 
@@ -484,11 +485,11 @@ class GenFdsGlobalVariable:
             Cmd += ("-o", Output)
             Cmd += Input
 
             SaveFileOnChange(CommandFile, ' '.join(Cmd), False)
             if IsMakefile:
-                if GlobalData.gGlobalDefines.get("FAMILY") == "MSFT":
+                if sys.platform == "win32":
                     Cmd = ['if', 'exist', Input[0]] + Cmd
                 else:
                     Cmd = ['-test', '-e', Input[0], "&&"] + Cmd
                 if ' '.join(Cmd).strip() not in GenFdsGlobalVariable.SecCmdList:
                     GenFdsGlobalVariable.SecCmdList.append(' '.join(Cmd).strip())
-- 
2.20.1.windows.1