FIRST_INCLUDE=(file[,...])
     NOFIRST_INCLUDE (D)

  Includes the specified files before any source files.  This
  qualifier corresponds to the Tru64 UNIX -FI switch.

  This qualifier is useful if you have command lines to pass to the C
  compiler that are exceeding the DCL command-line length limit.
  Using the /FIRST_INCLUDE qualifier can help solve this problem by
  replacing lengthy /DEFINE and /WARNINGS qualifiers with #define and
  #pragma message directives placed in a /FIRST_INCLUDE file.

  The default is NOFIRST_INCLUDE.