Merge pull request #1878 from compnerd/static-as-shared

Author: swift-ci

CoreFoundation/Base.subproj/CFBase.h

@@ -134,7 +134,7 @@
     #endif
 
     #if defined(_USRDLL)
-        #if defined(CoreFoundation_EXPORTS)
+        #if defined(CoreFoundation_EXPORTS) || defined(CF_BUILDING_CF)
             #define CF_EXPORT _CF_EXTERN __declspec(dllexport)
         #else
             #define CF_EXPORT _CF_EXTERN __declspec(dllimport)