Mail Archives: cygwin/2008/10/01/17:06:29
Chris Sutcliffe wrote:
> I've made a new version of the mingw-runtime available for download.
> For a list of changes see:
>
> http://cygwin.com/cgi-bin/cvsweb.cgi/src/winsup/mingw/ChangeLog?rev=1.409&cvsroot=src
>
> New features in release 3.15
> ============================
> ...
> * A replacement implementation for the getopt() family of functions,
> adding support for the GNU getopt_long_only() function. ...
>
This new getopt() sets optind to the index of the current option instead
of the next option.
Testcase:
#include <stdio.h>
#include <getopt.h>
int main(int argc, char **argv)
{
int opt;
while ((opt = getopt(argc, argv, "ab:c")) != -1)
printf("opt=%c, optind=%d\n", opt, optind);
printf("end optind=%d\n", optind);
return 0;
}
Output for "./prog -a -b arg -c":
- mingw-runtime-3.14, Cygwin, GNU getopt:
opt=a, optind=2
opt=b, optind=4
opt=c, optind=5
end optind=5
- mingw-runtime-3.15:
opt=a, optind=1
opt=b, optind=2
opt=c, optind=4
end optind=5
The new behavior violates this POSIX requirement:
"The variable optind is the index of the next element of the argv[]
vector to be processed."
http://www.opengroup.org/onlinepubs/009695399/functions/getopt.html
--
Christian Franke
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