Allow undefined symbols when linking libc++abi.dll on Windows
git-svn-id: https://llvm.org/svn/llvm-project/libcxxabi/trunk@302761 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9b3e9c4..2a0b4da 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -431,7 +431,8 @@
set(LIBCXXABI_HAS_UNDEFINED_SYMBOLS OFF)
if ((NOT LIBCXXABI_ENABLE_NEW_DELETE_DEFINITIONS)
- OR (LIBCXXABI_BUILD_EXTERNAL_THREAD_LIBRARY AND LIBCXXABI_ENABLE_SHARED))
+ OR (LIBCXXABI_BUILD_EXTERNAL_THREAD_LIBRARY AND LIBCXXABI_ENABLE_SHARED)
+ OR MINGW)
set(LIBCXXABI_HAS_UNDEFINED_SYMBOLS ON)
endif()