Mail Archives: cygwin/2004/04/29/04:21:11
Hi again,
i just find the solution to my problem
in fact it seems that adding:
extern int optind;
extern char *optarg;
solve the problem. The compiler then auto-import these variables and it
is working after. This problem doesn't seem to exist under linux but it
could be a difference in versions between my linux and my cygwin.
bertrand marquis a écrit:
> Hi,
>
> I need to compile a program using libiberty.a and the function
> getopt_long. When compiling with the flag -liberty my program crash
> because it don't take the right arguments from the command line. But
> without libiberty this part work before.
>
> i made a small program showing that problem, if anyone has an idea ?
> i'm using the latest cygwin from the installer ,gcc-3.3.1 and ld
> 2.15.90 20040312
>
> thanks
>
> You can find next my source code for the test program and the result i
> have with it.
>
>
> My test program:
>
> /*begin of argu.c*/
> #include <unistd.h>
> #include <getopt.h>
> #include <ctype.h>
> #include <stdio.h>
>
> int main(int argc, char **argv) {
>
> struct option long_opts[] = {
> {"v", 1, 0, 'v'},
> {"no-v", 0, 0, 'V'},
> {"k", 1, 0, 'k'},
> {"no-k", 0, 0, 'K'},
> {"l", 1, 0, 'l'},
> {"no-l", 0, 0, 'L'},
> {0, 0, 0, 0}
> };
> int c;
> while ((c = getopt_long(argc, argv, "v:Vk:Kl:L:",
> long_opts, NULL)) != EOF) {
>
> switch(c) {
> case 'v':
> printf("v %s\n",optarg);
> break;
> case 'V':
> printf("V\n");
> break;
> case 'k':
> printf("k %s\n",optarg);
> break;
> case 'K':
> printf("K\n");
> break;
> case 'l':
> printf("l %s\n",optarg);
> break;
> case 'L':
> printf("L\n");
> break;
> case '?':
> printf("other:%c\n",c);
> }
> }
> printf("argc=%d , optind=%d ,
> file=%s\n",argc,optind,argc>optind?*(argv+optind):"none");
> return 0;
> }
> /*end of argu.c*/
>
> when you compile it with : gcc argu.c -o argu.exe it works:
> $ ./argu.exe -v abc -K test
> v abc
> K
> argc=5 , optind=4 , file=test
>
> but when you compile it with gcc argu.c -o argu.exe -liberty it gives:
> $ ./argu.exe -v abc -K test
> v (null)
> K
> argc=5 , optind=1 , file=-v
>
>
>
>
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