Thread: Problem linking with curl since Pangolin (12.04)

hello,

have problem linking programs using curl since 12.04

example, example givent curl development documentations: cookie_interface.c below

code:

/*****************************************************************************   *                                  _   _ ____  _   *  project                     ___| | | |  _ \| |   *                             / __| | | | |_) | |   *                            | (__| |_| |  _ <| |___   *                             \___|\___/|_| \_\_____|   *   *  example shows usage of simple cookie interface.    */    #include <stdio.h>  #include <string.h>  #include <stdlib.h>  #include <errno.h>  #include <time.h>    #include <curl/curl.h>    static void  print_cookies(curl *curl)  {    curlcode res;    struct curl_slist *cookies;    struct curl_slist *nc;    int i;      printf("cookies, curl knows:\n");    res = curl_easy_getinfo(curl, curlinfo_cookielist, &cookies);    if (res != curle_ok) {      fprintf(stderr, "curl curl_easy_getinfo failed: %s\n", curl_easy_strerror(res));      exit(1);    }    nc = cookies, = 1;    while (nc) {      printf("[%d]: %s\n", i, nc->data);      nc = nc->next;      i++;    }    if (i == 1) {      printf("(none)\n");    }    curl_slist_free_all(cookies);  }    int  main(void)  {    curl *curl;    curlcode res;      curl_global_init(curl_global_all);    curl = curl_easy_init();    if (curl) {      char nline[256];        curl_easy_setopt(curl, curlopt_url, "http://www.google.com/"); /* google.com sets "pref" cookie */      curl_easy_setopt(curl, curlopt_verbose, 1l);      curl_easy_setopt(curl, curlopt_cookiefile, ""); /* start cookie engine */      res = curl_easy_perform(curl);      if (res != curle_ok) {        fprintf(stderr, "curl perform failed: %s\n", curl_easy_strerror(res));        return 1;      }        print_cookies(curl);        printf("erasing curl's knowledge of cookies!\n");      curl_easy_setopt(curl, curlopt_cookielist, "all");        print_cookies(curl);        printf("-----------------------------------------------\n"             "setting cookie \"pref\" via cookie interface:\n");  #ifdef win32  #define snprintf _snprintf  #endif      /* netscape format cookie */      snprintf(nline, sizeof(nline), "%s\t%s\t%s\t%s\t%lu\t%s\t%s",        ".google.com", "true", "/", "false", time(null) + 31337, "pref", "hello google, much!");      res = curl_easy_setopt(curl, curlopt_cookielist, nline);      if (res != curle_ok) {        fprintf(stderr, "curl curl_easy_setopt failed: %s\n", curl_easy_strerror(res));        return 1;                  }        /* http-header style cookie */      snprintf(nline, sizeof(nline),        "set-cookie: old_pref=3d141414bf4209321; "        "expires=sun, 17-jan-2038 19:14:07 gmt; path=/; domain=.google.com");      res = curl_easy_setopt(curl, curlopt_cookielist, nline);      if (res != curle_ok) {        fprintf(stderr, "curl curl_easy_setopt failed: %s\n", curl_easy_strerror(res));        return 1;                  }        print_cookies(curl);        res = curl_easy_perform(curl);      if (res != curle_ok) {        fprintf(stderr, "curl perform failed: %s\n", curl_easy_strerror(res));        return 1;      }    }    else {      fprintf(stderr, "curl init failed!\n");      return 1;    }      curl_global_cleanup();    return 0;  }

normally, compiled/linked 1 command line, , working on 10.04, way:

code:

`curl-config --cc --cflags --libs`  -o cookie_interface cookie_interface.c

of course, have installed libcurl stuff with:

code:

sudo apt-get install libcurl4-gnutls-dev

and since 12.04, get:

code:

$ `curl-config --cc --cflags --libs`  -o cookie_interface cookie_interface.c   /tmp/ccyjd6nn.o: in function `print_cookies':  cookie_interface.c:(.text+0xc3): undefined reference `curl_easy_getinfo'  cookie_interface.c:(.text+0xd6): undefined reference `curl_easy_strerror'  cookie_interface.c:(.text+0x161): undefined reference `curl_slist_free_all'  /tmp/ccyjd6nn.o: in function `main':  cookie_interface.c:(.text+0x187): undefined reference `curl_global_init'  cookie_interface.c:(.text+0x18c): undefined reference `curl_easy_init'  cookie_interface.c:(.text+0x1cc): undefined reference `curl_easy_setopt'  cookie_interface.c:(.text+0x1f7): undefined reference `curl_easy_setopt'  cookie_interface.c:(.text+0x222): undefined reference `curl_easy_setopt'  cookie_interface.c:(.text+0x231): undefined reference `curl_easy_perform'  cookie_interface.c:(.text+0x24d): undefined reference `curl_easy_strerror'  cookie_interface.c:(.text+0x2ba): undefined reference `curl_easy_setopt'  cookie_interface.c:(.text+0x35f): undefined reference `curl_easy_setopt'  cookie_interface.c:(.text+0x37b): undefined reference `curl_easy_strerror'  cookie_interface.c:(.text+0x3ef): undefined reference `curl_easy_setopt'  cookie_interface.c:(.text+0x40b): undefined reference `curl_easy_strerror'  cookie_interface.c:(.text+0x452): undefined reference `curl_easy_perform'  cookie_interface.c:(.text+0x46e): undefined reference `curl_easy_strerror'  cookie_interface.c:(.text+0x4c4): undefined reference `curl_global_cleanup'  collect2: ld retourné 1 code d'état d'exécution

so, see compilation ok, linker (ld) not find of symbols belonging libcurl.

suspect error due new multiarch organisation, other things done wrong.


idea on how solve (link programs curl correctly)?

answered here https://bugs.launchpad.net/bugs/1001576
use

code:

`curl-config --cc --cflags`  -o cookie_interface cookie_interface.c `curl-config --libs`

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