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

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Updated note text based on code review.

Change-Id: I0f32c5821b37062d23ddbf2252ae8b3d4c8739b5
Signed-off-by: Jennifer Marandola <jennifer.marandola@windriver.com>
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Jennifer Marandola 2016-02-22 13:37:16 -05:00 • committed by Gerrit Code Review
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doc/kernel/overview/kernel_fundamentals.rst
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@ -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
*********************