compilation error with GTK+ application

[vineeta7]

Hi

I am using GTK+ on redhat linux.I am trying to run helloworld program given in tutorial.
when I compile with command:gcc helloworld.c -o helloworld `pkg-config --cflags --libs gtk+`

I am getting this error:
/tmp/ccoBxmgE.o(.text+0x80): In function `main':
: undefined reference to `G_CALLBACK'
/tmp/ccoBxmgE.o(.text+0x91): In function `main':
: undefined reference to `G_OBJECT'
/tmp/ccoBxmgE.o(.text+0x9a): In function `main':
: undefined reference to `g_signal_connect'
/tmp/ccoBxmgE.o(.text+0xac): In function `main':
: undefined reference to `G_CALLBACK'
/tmp/ccoBxmgE.o(.text+0xbd): In function `main':
: undefined reference to `G_OBJECT'
/tmp/ccoBxmgE.o(.text+0xc6): In function `main':
: undefined reference to `g_signal_connect'
/tmp/ccoBxmgE.o(.text+0x113): In function `main':
: undefined reference to `G_CALLBACK'
/tmp/ccoBxmgE.o(.text+0x124): In function `main':
: undefined reference to `G_OBJECT'
/tmp/ccoBxmgE.o(.text+0x12d): In function `main':
: undefined reference to `g_signal_connect'
/tmp/ccoBxmgE.o(.text+0x13b): In function `main':
: undefined reference to `G_OBJECT'
/tmp/ccoBxmgE.o(.text+0x14c): In function `main':
: undefined reference to `G_CALLBACK'
/tmp/ccoBxmgE.o(.text+0x15d): In function `main':
: undefined reference to `G_OBJECT'
/tmp/ccoBxmgE.o(.text+0x166): In function `main':
: undefined reference to `g_signal_connect_swapped'
collect2: ld returned 1 exit status


I also tried to see pkg-config contains:
[vineeta@vineeta sample]$ pkg-config --list-all
gmodule-export-2.0 GModule - Dynamic module loader for GLib
gmodule-2.0 GModule - Dynamic module loader for GLib
glib-2.0 GLib - C Utility Library
gobject-2.0 GObject - GLib Type, Object, Parameter and Signal Library
gthread-2.0 GThread - Thread support for GLib
gmodule-no-export-2.0 GModule - Dynamic module loader for GLib

How to resolve these errors???

Creating simple window with GTK is running sucessfully.......

Regards
vineeta7

[aliov]

Hi

when I compile with command:gcc helloworld.c -o helloworld `pkg-config --cflags --libs gtk+`

use gcc helloworld.c -o helloworld `pkg-config --cflags --libs gtk+-2.0`

Regards.

[vineeta7]

Hi aliov

tried with that also but getting same problem. Now its generates

[vineeta@vineeta sample]$ gcc helloworld.c -o helloworld `pkg-config --cflags --libs gtk+-2.0`
Package gtk+-2.0 was not found in the pkg-config search path.
Perhaps you should add the directory containing `gtk+-2.0.pc'
to the PKG_CONFIG_PATH environment variable
No package 'gtk+-2.0' found
helloworld.c:1:21: gtk/gtk.h: No such file or directory
helloworld.c:5: parse error before '*' token
helloworld.c:11: parse error before "delete_event"
helloworld.c:11: parse error before '*' token
helloworld.c: In function `delete_event':
helloworld.c:26: `TRUE' undeclared (first use in this function)
helloworld.c:26: (Each undeclared identifier is reported only once
helloworld.c:26: for each function it appears in.)
helloworld.c: At top level:
helloworld.c:30: parse error before '*' token
helloworld.c: In function `main':
helloworld.c:40: `GtkWidget' undeclared (first use in this function)
helloworld.c:40: `window' undeclared (first use in this function)
helloworld.c:41: `button' undeclared (first use in this function)
helloworld.c:48: `GTK_WINDOW_TOPLEVEL' undeclared (first use in this function)
helloworld.c:56: `NULL' undeclared (first use in this function)
helloworld.c:80: `gtk_widget_destroy' undeclared (first use in this function)


I have copy it from tutorial example.

how to resolve this error???

vineeta

[aliov]

Hi,

You told me you use RedHat , so i believe it's a old version wish contains only the gtk+1.2.x series , so the new version of gtk it seems to don't be installed . you can use gtk+1.2 but there is a lot of changes between the two version of this library .

But be sure that you don't have the gtk+2.0 in the CD's of RedHat ,use your package manager to search , but i don't think it contained !

so there is two possibilities
1)- or to compile the new library from the source code ,wish i'm expecting to have a lot of compilation problems (so it's difficult ).

2)- If you like RedHat , you can use the newer version of it , Fedora , so i think it's the only one way to get the newer versions of the devel tools of Linux .

Let me know please what is your decision .

Regards.

[vineeta7]

hi aliov

Its working now. I set the env variables
CPPFLAGS='-I/usr/include'
LDFLAGS="-L/usr/lib"
PKG_CONFIG_PATH="/usr/lib/pkgconfig"

and compile with gcc helloworld.c -o helloworld `pkg-config --cflags --libs gtk+-2.0`

[aliov]

Hi ,

Well so Gtk+ 2.0 exist in RH , well i never used this Distro, but in any case you can have a look in the /usr/lib/pkgconfig to see what libraries are ready to be used by you and by other programs .

Regards.

[vineeta7]

hi

can u please tell me how to display value in gtk which is continously changing.I got a function which can display text but didnt find any function displaying value.

I want to show the counter (value) and text with displaying sum.


Please reply quickly its urgent

Regards
vineeta

[aliov]

gchar * car = g_strdup_printf("%d", i);

and here you can insert the car variable as a normal char * , inside any function of gtk , like gtk_set_text or gtk_text_buffer_insert.

g_free(car); // if you need to save some memory .

Tell me if this is enough , by the way it's better to make another threads each time you have something special in GTK, so other people can see them .

Regards.

[devils casper]

Have you checked this thread?

[vineeta7]

yes aliov

getting value in a GTK window.

I am adding new thread .. please go through that