doc: Doc updates for C++ feature with updates from code review.

Updated note text based on code review.

Change-Id: I0f32c5821b37062d23ddbf2252ae8b3d4c8739b5
Signed-off-by: Jennifer Marandola <jennifer.marandola@windriver.com>

doc/kernel/overview/kernel_fundamentals.rst

@@ -340,6 +340,40 @@ Applications that require a more extensive C library can either submit
 contributions that enhance the existing library or substitute
 a replacement library.
 
+C++ Support for Applications
+****************************
+
+The Zephyr kernel supports applications written in both C and C++. However, to
+use C++ in an application, you must configure your kernel to include C++
+support and the build system must select the correct compiler.
+
+The build system selects the C++ compiler based on the suffix of the files.
+Files identified with either a **cxx** or a **cpp** suffix are compiled using
+the C++ compiler. For example, :file:`myCplusplusApp.cpp`.
+
+The Zephyr kernel currently provides only a subset of C++ functionality. The
+following features are not supported:
+
+* Dynamic object management with the **new** and **delete** operators
+* :abbr:`RTTI (run-time type information)`
+* Exceptions
+* Static global object destruction
+
+While not an exhaustive list, support for the following functionality is
+included:
+
+* Inheritance
+* Virtual functions
+* Virtual tables
+* Static global object constructors
+
+Static global object constructors are initialized after the drivers are
+initialized but before the application :c:func:`main()` function. Therefore,
+use of C++ is restricted to application code.
+
+.. note::
+   Do not use C++ for kernel, driver, or system initialization code.
+
 Device Driver Library
 *********************