Configure default ABI library as NONE on Windows

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@291306 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 405e0da..6dbe8f9 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -116,7 +116,12 @@
     set(LIBCXX_CXX_ABI_INCLUDE_PATHS "${LIBCXX_LIBCXXABI_INCLUDES_INTERNAL}")
     set(LIBCXX_CXX_ABI_INTREE 1)
   else()
-    set(LIBCXX_CXX_ABI_LIBNAME "default")
+    if (WIN32 AND NOT MINGW)
+      # FIXME: Figure out how to configure the ABI library on Windows.
+      set(LIBCXX_CXX_ABI_LIBNAME "none")
+    else()
+      set(LIBCXX_CXX_ABI_LIBNAME "default")
+    endif()
   endif()
 else()
   set(LIBCXX_CXX_ABI_LIBNAME "${LIBCXX_CXX_ABI}")