.
<DT><TT>OS_TYPE</tt>
<DD>
Defined to a string that represents the operating system name.  Usually
just the macro name used to identify the operating system, but enclosed in quotes.
<DT><TT>CPP_WORDSZ</tt>
<DD>
The word size in bits as a constant suitable for preprocessor tests,
i.e. without casts or sizeof expressions.  Currently always defined as
either 64 or 32.  For platforms supporting both 32- and 64-bit ABIs,
this should be conditionally defined depending on the current ABI.
There is a default of 32