CoreFoundation: we only support /MD builds on Winddows

The static CRT is fraught with peril.  Simply assume that we will never
support it - full ostrich mode enabled!

Author: compnerd

CoreFoundation/CMakeLists.txt

@@ -326,6 +326,11 @@ elseif(CMAKE_SYSTEM_NAME STREQUAL Darwin)
                              PRIVATE
                                -DDEPLOYMENT_TARGET_MACOSX)
 elseif(CMAKE_SYSTEM_NAME STREQUAL Windows)
+  # NOTE(compnerd) we only support building with the dynamic CRT as using the
+  # static CRT causes problems for users of the library.
+  target_compile_definitions(CoreFoundation
+                             PRIVATE
+                               -D_DLL)
   target_compile_definitions(CoreFoundation
                              PRIVATE
                                -DDEPLOYMENT_TARGET_WINDOWS)