cxxtest C++ test program

This is a test of the C++ standard library. At present a port of the uClibc++ C++ library is available. Due to licensing issues, the uClibc++ C++ library is not included in the NuttX source tree by default, but must be installed (see the README.txt file in the uClibc++ download package for installation).

The uClibc++ test includes simple test of:

• iostreams,
• STL,
• RTTI, and
• Exceptions

### Example Configuration Options

• CONFIG_TESTING_CXXTEST=y – Enables the example

### Other Required Configuration Settings

Other NuttX setting that are required include:

• CONFIG_HAVE_CXX=y
• CONFIG_HAVE_CXXINITIALIZE=y
• CONFIG_UCLIBCXX=y or CONFIG_LIBCXX=y

Additional uClibc++/libcxx settings may be required in your build environment.