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this is the main option processing routine
int res = optionProcess( pOpts, argc, argv );
||program options descriptor|
||program arg count|
||program arg vector|
|returns||int||the count of the arguments processed|
This is the main entry point for processing options. It is intended that this procedure be called once at the beginning of the execution of a program. Depending on options selected earlier, it is sometimes necessary to stop and restart option processing, or to select completely different sets of options. This can be done easily, but you generally do not want to do this.
The number of arguments processed always includes the program name. If one of the arguments is "--", then it is counted and the processing stops. If an error was encountered and errors are to be tolerated, then the returned value is the index of the argument causing the error.
Errors will cause diagnostics to be printed.
or may not be called. It depends upon whether or not the options
were generated with the "allow-errors" attribute, or if the
ERRSKIP_OPTERR or ERRSTOP_OPTERR macros were invoked.