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

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

    When /FIRST_INCLUDE=file is specified, file is included in the
    source as if the line before the first line of the source were:

    #include "file"

    If more than one file is specified, the files are included in
    their order of appearance on the command line.

    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 preprocessor directives placed in a /FIRST_
    INCLUDE file.

    The default is /NOFIRST_INCLUDE.