Version-Dependency_Tables

   New functions are added to the VSI C Run-Time Library with each
   version of VSI C. These functions are implemented and shipped with
   the OpenVMS operating system, while the documentation and header
   files containing their prototypes are shipped with versions of
   the VSI C compiler.

   You might have a newer version of VSI C that has header files
   and documentation for C RTL functions that are not supported on
   your older OpenVMS system. For example, if your target operating
   system platform is OpenVMS Version 7.2, you cannot use C RTL
   functions introduced on OpenVMS Version 7.3, even though they are
   documented in this manual.

   The following tables list what C RTL functions are supported
   on recent OpenVMS versions. This is helpful for determining the
   functions to avoid using on your target OpenVMS platforms.
 

Additional information available:

All_OpenVMS_Versions            V6.2_and_Higher V7.0_and_Higher
V7.0_Alpha_and_Higher           V7.2_and_Higher V7.3_and_Higher
V7.3-1_and_Higher               V7.3-2_and_Higher               V8.2_and_Higher
V8.3_and_Higher V8.4_and_Higher