Re: Clock widget

[Jeroen Benckhuijsen <jfbenck home nl>]

> I'm trying to get the clock widget to work, to no avail. Here's the
> source file:
> 
> #include <gtk/gtk.h>
> #include "gnome.h"
> #include "/usr/include/libgnomeui/gtk-clock.h"
> 
> int main(int   argc, char *argv[])
> {
> GtkWidget *window, *clk;
> 
>     gtk_init(&argc, &argv);
>     
>         window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
>     clk = gtk_clock_new(GTK_CLOCK_REALTIME);
> 
>   gtk_signal_connect (GTK_OBJECT (window), "destroy", 
>                     GTK_SIGNAL_FUNC (gtk_main_quit), 
>                     "WM destroy");                    
>                       
>     gtk_widget_show (window);                 
>     gtk_main ();
>     
>     return(0);
> } 
> /*********************************************************/
> Here's the Makefile:
> 
> CC = gcc
> 
> zzz: zzz.c 
>       $(CC) `gtk-config --cflags`  zzz.c -o zzz `gtk-config --libs`
> 
> clean: 
>       rm -f *.o zzz
> 
> /*********************************************************/
> 
>  At compile time I get the following error messages:
> 
> /tmp/ccN6oiYy.o: In function `main':
> /tmp/ccN6oiYy.o(.text+0x28): undefined reference to `gtk_clock_new'
> collect2: ld returned 1 exit status
> 
>  What's wrong if gtk-clock.h is precisely what defines gtk_clock
>  functions?
> I'm using GTK+-1.2.5-2, linux 2.2.12 (RedHat 6.1), gnome 1.0.40.
> 
> I would appreciate it if anybody could reply. 
> Thanks,
> 
> Henry
> 

Rather easy: 

Gtk-clock.h is in fact included (that's why the c-file is succesfully
compiled into a .o-file.) However when linking the the .o file to a
executable, the linker can't find the c code of gtk_clock_new. Add
"-L/usr/local/libgnomeui -lgnomeui" to you're makefile on the compile
line:  $(CC) `gtk-config ...etc. The part after -L is the directory in
which the library with the code of gtk_clock_new can be found. The part
after -l is the filename of the library without the preceding lib and
without the .a at the end (libgnomeui.a --> gnomeui). After these
modifications the program should link fine. If libgnomeui is a shared
library you'll have to make this known to the dynamic linker (ld.so) by
adding an entry to /etc/ld.so.conf and running ldconfig, however this
requeires root-privileges

Jeroen