PROBLEM: (117-1-17992:, 85821, 86835) (PATCH ID: OSF520-230)
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A program which contains a #include of <stdio.h> and is compiled using C++,
GCC or some other non-Compaq C compiler, will generate compilation errors
related to "#pragma extern_prefix" when either _XOPEN_SOURCE_EXTENDED
or _XOPEN_SOURCE=420 feature test macros are defined.  Also, the ftime()
prototype was not being made visible from <sys/timeb.h> in the default
compilation environment (ie: with no standard feature test macros defined),
making it difficult to use with C++ and other compilers & compilation modes
that require function prototypes.  This patch addresses these problems.