Document common clang compatibility issues.
Patch by Zhanyong Wan.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@98708 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/UsersManual.html b/docs/UsersManual.html
index 41715bb..e7ea133 100644
--- a/docs/UsersManual.html
+++ b/docs/UsersManual.html
@@ -796,6 +796,13 @@
<p>Note that released Clang compilers will refuse to even try to use clang to compile C++ code unless you pass the <tt>-ccc-clang-cxx</tt> option to the driver. To turn on Clang's C++ support, please pass that flag. Clang compilers built from the Subversion trunk enable C++ support by default, and do not require the <tt>-ccc-clang-cxx</tt> flag.</p>
+<p>Clang strives to strictly conform to the C++ standard. That means
+it will reject invalid C++ code that another compiler may accept. If
+Clang reports errors in your code, please check
+the <a href="http://clang.llvm.org/cxx_compatibility.html">C++
+Compatibility</a> page to see whether they are C++-conformance bugs
+and how you can fix them.</p>
+
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<h2 id="objcxx">Objective C++ Language Features</h2>
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