diff -r 930582f667a1 -r ee2d8f1bef5b make/common/Defs-windows.gmk
--- a/make/common/Defs-windows.gmk	Thu Apr 29 14:32:40 2010 -0700
+++ b/make/common/Defs-windows.gmk	Tue May 11 14:35:21 2010 -0700
@@ -77,6 +77,11 @@
     MSVCPNN_DLL = msvcp90.dll
     MS_RUNTIME_LIBRARIES += $(MSVCRNN_DLL)
   endif
+  ifeq ($(COMPILER_VERSION), VS2010)
+    MSVCRNN_DLL = msvcr100.dll
+    MSVCPNN_DLL = msvcp100.dll
+    MS_RUNTIME_LIBRARIES += $(MSVCRNN_DLL)
+  endif
 endif
 
 # C Compiler flag definitions
@@ -175,6 +180,20 @@
       CC_LOWER_OPT   = -O1
     endif
   endif
+  ifeq ($(COMPILER_VERSION), VS2010)
+    # Automatic precompiled header option to use (if COMPILE_APPROACH=batch)
+    AUTOMATIC_PCH_OPTION =
+    GX_OPTION = -EHsc
+    ifeq ($(ARCH_DATA_MODEL), 32)
+      CC_HIGHEST_OPT = -O2
+      CC_HIGHER_OPT  = -O1
+      CC_LOWER_OPT   = -O1
+    else
+      CC_HIGHEST_OPT = -O2
+      CC_HIGHER_OPT  = -O1
+      CC_LOWER_OPT   = -O1
+    endif
+  endif
   CC_NO_OPT      = -Od
 else # CC_VERSION
   # GCC not supported, but left for historical reference...