[libcxx] [doc] Add a release note for distributors about MinGW builds and dllimport
This allows distributors to simplify how libc++ is built in MinGW
configurations.
Differential Revision: https://reviews.llvm.org/D127151
NOKEYCHECK=True
GitOrigin-RevId: 8ab2c384b8ad5afe4f23d02961ed7327d491aaf9
diff --git a/docs/ReleaseNotes.rst b/docs/ReleaseNotes.rst
index 2042b35..8dc8733 100644
--- a/docs/ReleaseNotes.rst
+++ b/docs/ReleaseNotes.rst
@@ -184,3 +184,8 @@
- The ``LIBCXX_ENABLE_DEBUG_MODE_SUPPORT`` CMake configuration is not supported anymore. If you
were disabling support for the debug mode with that flag, please use ``LIBCXX_ENABLE_BACKWARDS_COMPATIBILITY_DEBUG_MODE_SYMBOLS=OFF``
instead.
+
+- MinGW DLL builds of libc++ no longer use dllimport in their headers, which
+ means that the same set of installed headers works for both DLL and static
+ linkage. This means that distributors finally can build both library
+ versions with a single CMake invocation.