Use the -posixlib option with the compiler to invoke the POSIX bindings library libposf90.a. For a complete list of these functions see Chapter 3, "POSIX Functions" in the Intel® Fortran Libraries Reference Manual.
Use the -Vaxlib option with the compiler to invoke the VAX* compatibility functions libpepcf90.a. This also brings in the Intel's compatibility functions for Sun* and Microsoft*. For a complete list of these functions see Chapter 2, "Portability Functions" in the Intel® Fortran Libraries Reference Manual.