getopt function

Kai Ruottu
Wed Aug 30 21:25:00 GMT 2006

Dima Sorkin wrote :
> 1) A question on libc function:
> int getopt(int argc, char * const argv[],
>                  const char *optstring);
> The fact that it declares "char * const argv[]" and not
> "const char * const argv[]" means that it changes argv ?

> 2) Is libc containing POSIX functions shipped
> with gcc,


> or it is a completely different project ?

Yes and No... The GNU C library is working only with Linux.  Not ported for
Solaris2, AIX, HP-UX, SVR4,... Most platforms provide their own C libraries
and these are proprietary or custom (sources maybe available) ones.

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