optionProcess - this is the main option processing routine

       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.  A hyphen by  itself  ("-")  will
       also  cause processing to stop and will not be counted among the processed arguments.  A hyphen by itself
       is treated as an operand.  Encountering an operand stops option processing.

       opts   program options descriptor

       a_ct   program arg count

       a_v    program arg vector

       Errors will cause diagnostics to be printed.  exit(3) may 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.

       optionProcess - this is the main option processing routine

       the count of the arguments processed

       The info documentation for the -lopts library.
       ao_string_tokenize(3), configFileLoad(3), optionFileLoad(3), optionFindNextValue(3),  optionFindValue(3),
       optionFree(3),    optionGetValue(3),    optionLoadLine(3),    optionMemberList(3),    optionNextValue(3),
       optionOnlyUsage(3),     optionPrintVersion(3),     optionPrintVersionAndReturn(3),      optionRestore(3),
       optionSaveFile(3),    optionSaveState(3),    optionUnloadNested(3),    optionVersion(3),    strequate(3),
       streqvcmp(3), streqvmap(3), strneqvcmp(3), strtransform(3),

                                                   2018-08-26                                   optionProcess(3)

       #include <your-opts.h>
       cc [...] -o outfile infile.c -lopts [...]

       int optionProcess(tOptions * opts, int a_ct, char ** a_v);