Documentation: add a note that Clang on Mageia 2 can not find libstdc++ headers


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171729 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/GettingStarted.rst b/docs/GettingStarted.rst
index 3cba2ca..5009d1c 100644
--- a/docs/GettingStarted.rst
+++ b/docs/GettingStarted.rst
@@ -389,6 +389,9 @@
 3.0 does not implement a few builtins that are used in this library.  We
 recommend using the system GCC to compile LLVM and Clang in this case.
 
+**Clang 3.0 on Mageia 2**.  There's a packaging issue: Clang can not find at
+least some (``cxxabi.h``) libstdc++ headers.
+
 .. _Getting Started with LLVM:
 
 Getting Started with LLVM