Error compiling this example code of libcurl

Question

Its an example code to download a file and show gtk window..
http://curl.haxx.se/libcurl/c/curlgtk.html
I get this error:-
shadyabhi@ArchLinux /tmp $ gcc curlgtk.c `pkg-config --libs --cflags libcurl`
curlgtk.c:13:21: fatal error: gtk/gtk.h: No such file or directory
compilation terminated.
shadyabhi@ArchLinux /tmp $
Then I tried :-
shadyabhi@ArchLinux /tmp $ gcc curlgtk.c `pkg-config --libs --cflags libcurl` -I /usr/include/gtk-2.0/
In file included from /usr/include/gtk-2.0/gdk/gdk.h:32:0,
from /usr/include/gtk-2.0/gtk/gtk.h:32,
from curlgtk.c:13:
/usr/include/gtk-2.0/gdk/gdkapplaunchcontext.h:30:21: fatal error: gio/gio.h: No such file or directory
compilation terminated.
shadyabhi@ArchLinux /tmp $
Whats the issue?
The complete code:-
/* Copyright (c) 2000 David Odin (aka DindinX) for MandrakeSoft */
/* an attempt to use the curl library in concert with a gtk-threaded application */
#include <stdio.h>
#include <gtk/gtk.h>
#include <curl/curl.h>
#include <curl/types.h> /* new for v7 */
#include <curl/easy.h> /* new for v7 */
GtkWidget *Bar;
size_t my_write_func(void *ptr, size_t size, size_t nmemb, FILE *stream)
return fwrite(ptr, size, nmemb, stream);
size_t my_read_func(void *ptr, size_t size, size_t nmemb, FILE *stream)
return fread(ptr, size, nmemb, stream);
int my_progress_func(GtkWidget *bar,
double t, /* dltotal */
double d, /* dlnow */
double ultotal,
double ulnow)
/* printf("%d / %d (%g %%)\n", d, t, d*100.0/t);*/
gdk_threads_enter();
gtk_progress_set_value(GTK_PROGRESS(bar), d*100.0/t);
gdk_threads_leave();
return 0;
void *my_thread(void *ptr)
CURL *curl;
CURLcode res;
FILE *outfile;
gchar *url = ptr;
curl = curl_easy_init();
if(curl)
outfile = fopen("test.curl", "w");
curl_easy_setopt(curl, CURLOPT_URL, url);
curl_easy_setopt(curl, CURLOPT_WRITEDATA, outfile);
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, my_write_func);
curl_easy_setopt(curl, CURLOPT_READFUNCTION, my_read_func);
curl_easy_setopt(curl, CURLOPT_NOPROGRESS, 0L);
curl_easy_setopt(curl, CURLOPT_PROGRESSFUNCTION, my_progress_func);
curl_easy_setopt(curl, CURLOPT_PROGRESSDATA, Bar);
res = curl_easy_perform(curl);
fclose(outfile);
/* always cleanup */
curl_easy_cleanup(curl);
return NULL;
int main(int argc, char **argv)
GtkWidget *Window, *Frame, *Frame2;
GtkAdjustment *adj;
/* Must initialize libcurl before any threads are started */
curl_global_init(CURL_GLOBAL_ALL);
/* Init thread */
g_thread_init(NULL);
gtk_init(&argc, &argv);
Window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
Frame = gtk_frame_new(NULL);
gtk_frame_set_shadow_type(GTK_FRAME(Frame), GTK_SHADOW_OUT);
gtk_container_add(GTK_CONTAINER(Window), Frame);
Frame2 = gtk_frame_new(NULL);
gtk_frame_set_shadow_type(GTK_FRAME(Frame2), GTK_SHADOW_IN);
gtk_container_add(GTK_CONTAINER(Frame), Frame2);
gtk_container_set_border_width(GTK_CONTAINER(Frame2), 5);
adj = (GtkAdjustment*)gtk_adjustment_new(0, 0, 100, 0, 0, 0);
Bar = gtk_progress_bar_new_with_adjustment(adj);
gtk_container_add(GTK_CONTAINER(Frame2), Bar);
gtk_widget_show_all(Window);
if (!g_thread_create(&my_thread, argv[1], FALSE, NULL) != 0)
g_warning("can't create the thread");
gdk_threads_enter();
gtk_main();
gdk_threads_leave();
return 0;

Answer 1

Your error is unrelated to curl. You're not properly linking against gtk
gcc curlgtk.c $(pkg-config --libs --cflags gtk+-2.0 libcurl)