None.
Adds a directory to the search path for include files, .mod files, and .smod files.
Not applicable.
If XL Fortran calls cpp, this option adds a directory to the search path for #include files. Before checking the default directories for include, .mod, and .smod files, the compiler checks each directory in the search path. For include files, this path is only used if the file name in an INCLUDE line is not provided with an absolute path. For #include files, refer to the cpp documentation for the details of the -I option.
The compiler appends a / to path_name and then concatenates that with the file name before making a search. If you specify more than one -I option on the command line, files are searched in the order of the path_name names as they appear on the command line.
Also, the compiler will search /opt/ibm/xlf/15.1.0/include where include and .mod files shipped with the compiler are located.