Re: compile multiple source file

[Vlad Volodin <vest 84 gmail com>]

Hello,

You probably did not declare the 'hello' function in the main.c file. To do
this, just write a header of the function beforevthe main function.

Regards,
Vlad
On Aug 31, 2012 4:48 PM, "Rudra Banerjee" <bnrj rudra yahoo com> wrote:

> I have two file:
>
> #THE MAIN###
> #include <gtk/gtk.h>
>
> int main( int   argc,
>           char *argv[] )
> {
>     GtkWidget *window;
>     GtkWidget *button;
>
>     gtk_init (&argc, &argv);
>     window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
>     gtk_container_set_border_width (GTK_CONTAINER (window), 10);
>     button = gtk_button_new_with_label ("Hello World");
>     g_signal_connect (button, "clicked",
>                       G_CALLBACK (hello), NULL);
>     gtk_container_add (GTK_CONTAINER (window), button);
>     gtk_widget_show (button);
>     gtk_widget_show (window);
>     gtk_main ();
>
>     return 0;
> }
>
>
> #########hello.c
> #include <gtk/gtk.h>
> static void hello( GtkWidget *widget,
>                    gpointer   data )
> {
>     g_print ("Hello World\n");
> }
>
>
> If they are in separate file, then,
> $ gcc `pkg-config --cflags --libs gtk+-3.0` hello.c main.c -c
> main.c: In function âmainâ:
> main.c:13:5: error: âhelloâ undeclared (first use in this function)
> main.c:13:5: note: each undeclared identifier is reported only once for
> each function it appears in
>
> But obviously, putting both of them together in a single file works.
> How to compile while keeping them seperate
> ?
>
>
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