getopt.h: Compiling Linux C-Code in Windows

Question

I am trying to get a set of nine *.c files (and nine related *.h files) to compile under Windows.

The code was originally designed in Linux to take command line arguments using the standard GNU-Linux/C library "getopt.h". And that library does not apply to building the C-code in Windows.

I want to ignore what my code does right now and ask the following question. For those of you familiar with this C-library "getopt.h": will it be possible to build and run my code in Windows if it depends on POSIX-style command-line arguments? Or will I have to re-write the code to work for Windows, passing input files differently (and ditching the "getopt.h" dependency)?

Answer 1

getopt() is actually a really simple function. I made a github gist for it, code from here is below too

#include <string.h> #include <stdio.h>  int     opterr = 1,             /* if error message should be printed */   optind = 1,             /* index into parent argv vector */   optopt,                 /* character checked for validity */   optreset;               /* reset getopt */ char    *optarg;                /* argument associated with option */  #define BADCH   (int)'?' #define BADARG  (int)':' #define EMSG    ""  /* * getopt -- *      Parse argc/argv argument vector. */ int   getopt(int nargc, char * const nargv[], const char *ostr) {   static char *place = EMSG;              /* option letter processing */   const char *oli;                        /* option letter list index */    if (optreset || !*place) {              /* update scanning pointer */     optreset = 0;     if (optind >= nargc || *(place = nargv[optind]) != '-') {       place = EMSG;       return (-1);     }     if (place[1] && *++place == '-') {      /* found "--" */       ++optind;       place = EMSG;       return (-1);     }   }                                       /* option letter okay? */   if ((optopt = (int)*place++) == (int)':' ||     !(oli = strchr(ostr, optopt))) {       /*       * if the user didn't specify '-' as an option,       * assume it means -1.       */       if (optopt == (int)'-')         return (-1);       if (!*place)         ++optind;       if (opterr && *ostr != ':')         (void)printf("illegal option -- %c\n", optopt);       return (BADCH);   }   if (*++oli != ':') {                    /* don't need argument */     optarg = NULL;     if (!*place)       ++optind;   }   else {                                  /* need an argument */     if (*place)                     /* no white space */       optarg = place;     else if (nargc <= ++optind) {   /* no arg */       place = EMSG;       if (*ostr == ':')         return (BADARG);       if (opterr)         (void)printf("option requires an argument -- %c\n", optopt);       return (BADCH);     }     else                            /* white space */       optarg = nargv[optind];     place = EMSG;     ++optind;   }   return (optopt);                        /* dump back option letter */ }