C inclusion problem

Kenny_Strawn · 06-23-2010, 04:44 PM

When I go to #include vital GTK header files this way:

Code:

#include <glib.h>
#include <glib/gtypes.h>
#include <gtk/gtk.h>

I get the dreaded "No such file or directory" error, even *WITH* the files installed. Why? Are there any variables I have to set or something?

Sergei Steshenko · 06-23-2010, 05:18 PM

Quote:

Originally Posted by Kenny_Strawn

When I go to #include vital GTK header files this way:

Code:

#include <glib.h>
#include <glib/gtypes.h>
#include <gtk/gtk.h>

I get the dreaded "No such file or directory" error, even *WITH* the files installed. Why? Are there any variables I have to set or something?

Enter

setting gcc include paths

into Yahoo and read the very first match.

ForzaItalia2006 · 06-23-2010, 05:19 PM

Quote:

Originally Posted by Kenny_Strawn

When I go to #include vital GTK header files this way:

Code:

#include <glib.h>
#include <glib/gtypes.h>
#include <gtk/gtk.h>

I get the dreaded "No such file or directory" error, even *WITH* the files installed. Why? Are there any variables I have to set or something?

I don't know which system you're using and I don't know which version of GTK you're using, but you could try to include this one (or similar) into your compilation:

pkg-config --cflags --libs gtk+-2.0

For example:

Code:

gcc <whatever> `pkg-config --cflags --libs gtk+-2.0`

BUT, you should also find this in a _good_ GTK tutorial for Linux :-)

Andi

Kenny_Strawn · 06-23-2010, 08:01 PM

Quote:

Originally Posted by ForzaItalia2006

I don't know which system you're using and I don't know which version of GTK you're using, but you could try to include this one (or similar) into your compilation:

pkg-config --cflags --libs gtk+-2.0

For example:

Code:

gcc <whatever> `pkg-config --cflags --libs gtk+-2.0`

BUT, you should also find this in a _good_ GTK tutorial for Linux :-)

Andi

I'm using Ubuntu 10.10 Alpha 1 with GNOME 2.31, and that post really helped me. Thank you. So much for Sergei Stashenko's blunt comment telling me to go take a hike.

Sergei Steshenko · 06-23-2010, 08:17 PM

Quote:

Originally Posted by Kenny_Strawn

I'm using Ubuntu 10.10 Alpha 1 with GNOME 2.31, and that post really helped me. Thank you. So much for Sergei Stashenko's blunt comment telling me to go take a hike.

Do you understand the mechanism behind

Code:

gcc <whatever> `pkg-config --cflags --libs gtk+-2.0`

?

I.e. I suggested you to study the fundamental issues, and ForzaItalia2006 gave you a particular command line which, of course, in the end uses the fundamental features you are supposed to know. Unless you know/understand the fundamental issues, you are destined to face similar problems in the future.

By the way, read about 'pkg-config' - to know why/what for it was invented. Its existence is due to a bunch of similar fundamental issues involved is SW development.

ForzaItalia2006 · 06-24-2010, 02:29 AM

Quote:

Originally Posted by Sergei Steshenko

Do you understand the mechanism behind

Code:

gcc <whatever> `pkg-config --cflags --libs gtk+-2.0`

?

I.e. I suggested you to study the fundamental issues, and ForzaItalia2006 gave you a particular command line which, of course, in the end uses the fundamental features you are supposed to know. Unless you know/understand the fundamental issues, you are destined to face similar problems in the future.

Yes, you're generally right and it is always beneficial to study the fundamental details, but sometimes the OPs aren't immediately interested in the details, but just want to get a simple program working.

And IF an OP is really interested in the details, he/she will research about pkg-config, the features which it provides and possibly finally what compiler options like -l<x> or -I<x> mean.

Andi