HP 3000 Manuals

MPE/iX Developer's Kit Reference Manual Volume I

Specifying the _POSIX_SOURCE Feature Test Macro 

An application that includes a header described by the POSIX.1 standard
must specify the _POSIX_SOURCE feature test macro prior to any instance
of that header being included in the source file.  When _POSIX_SOURCE is
specified in the source file, the following conditions are true:

   *   All symbols required by the POSIX.1 standard are made visible to
       the application.

   *   Symbols that are explicitly permitted, but not required, by the
       POSIX.1 standard are made visible to the application.

   *   Additional symbols not required or explicitly permitted by the
       POSIX.1 standard are not made visible.

MPE/iX 5.0 Documentation