[llvm-branch-commits] [cfe-branch] r341521 - ReleaseNotes: libc++ _LIBCPP_HIDE_FROM_ABI_PER_TU

[Hans Wennborg via llvm-branch-commits]

Author: hans
Date: Thu Sep  6 01:09:39 2018
New Revision: 341521

URL: http://llvm.org/viewvc/llvm-project?rev=341521&view=rev
Log:
ReleaseNotes: libc++ _LIBCPP_HIDE_FROM_ABI_PER_TU

Modified:
    cfe/branches/release_70/docs/ReleaseNotes.rst

Modified: cfe/branches/release_70/docs/ReleaseNotes.rst
URL: http://llvm.org/viewvc/llvm-project/cfe/branches/release_70/docs/ReleaseNotes.rst?rev=341521&r1=341520&r2=341521&view=diff
==============================================================================
--- cfe/branches/release_70/docs/ReleaseNotes.rst (original)
+++ cfe/branches/release_70/docs/ReleaseNotes.rst Thu Sep  6 01:09:39 2018
@@ -390,8 +390,15 @@ The following methods have been added:
 
 -  ...
 
-Significant Known Problems
-==========================
+libc++ Changes
+==============
+Users that wish to link together translation units built with different
+versions of libc++'s headers into the same final linked image should define the
+`_LIBCPP_HIDE_FROM_ABI_PER_TU` macro to `1` when building those translation
+units. In a future release, not defining `_LIBCPP_HIDE_FROM_ABI_PER_TU` to `1`
+and linking translation units built with different versions of libc++'s headers
+together may lead to ODR violations and ABI issues.
+
 
 Additional Information
 ======================