Problem linking KDevelop projects

First of all, sorry for my English mistakes.

I'm trying to learn how to develop KDE C++ Aplications and I choose to use KDevelop (3.0 alpha 4 gideon) to help me.
I was using Larrosa's Tutorials ( devel-home.kde.org/~larrosa/tutorial/) and I was re-writing its codes in Kdevelop.

Well, the problem is that I always have the follow error when I try to build the project ( it compiles fine, the problem is the linking operation). In this case is the tutorial P4:
": undefined reference to `KHTMLPart::KHTMLPart[in-charge](QWidget*, char const*, QObject*, char const*, KHTMLPart::GUIProfile)'"

I have a similar error when I try to build my rewrited code from P3 tutorial, however it was about KFileDialog and not KHTMLPart.

I'm sure that I don't forgot any command line ( I checked it hundred of times, besides it compiles OK). The code from that I copied is ok too, because I can build it's source without any error.

I really think that's a problem about Makefile (maybe autoconf), because I create a Kdevelop project (using the option: "a simple KDE project") with the same name as the tutorial (p4). Then, I copy the sources (main.cpp, p4.h and p4.cpp). I try to build it, but I got the same error as above. However when I copy the file "Makefile.am" from the tutorial's sources to my project, it works! I try to see if there are many differences between these files, but there are many and these files and uncompreensive for me.

I also reisntall libs, devel packages, update them (to slackware current version), use kdevelop 2.15, but nothing.

So, to finish, anyone knows how can I solve this problem or, at least, anyone has follow these tutorials like me (rewriting code into Kdevelop) and had success ? What distro, gcc or kdevelop version did you use ?

I will be very pleased for any help.

As a workaround, you can add -lkhtml to Project options-> LDFLAGS. It's not a perfect solution, but should work.

Thanks a lot for your attention, Mara. Unfortunately, It didn't work yet. I got the follow error in configure :

* configure: error: C compiler cannot create executables
* See `config.log' for more details.
* *** Exited with status: 77 ***

checking the config.log I noticed the follow:

configure:2530: gcc -lkhtml conftest.c >&5
/usr/lib/gcc-lib/i486-slackware-linux/3.2.3/../../../../i486-slackware-linux/bin/ld: cannot find -lkhtml
collect2: ld returned 1 exit status
configure:2533: $? = 1

I also tried to use:
- khtmlw ( its a option that I see in
http://www.kde.gr.jp/help/doc/kdevel...r-options.html )

but this time I got the error (Make output) :
* g++: unrecognized option `-khtmlw'
-------------------------------------------------------------------------------

I'm really confused. I was looking for a solution for this in the last three weeks. What I just want is to build a simple (VERY simple) web browser using KParts, and I found some tutorials (in the net, magazines) and all of them use the this solution:

KURL url = "http://www.kde.org";
KHTMLPart *w = new KHTMLPart();
w->openURL(url);
w->view()->resize(500, 400);
w->show();
-----------------------------------------------------------
I tried this solution many, many times (also copying the complete source froma a larrosa's tutorial - there is a link in the first post) but always with the same error:
: undefined reference to `KHTMLPart::KHTMLPart[in ... bla bla bla..

Checking more, I found that the code generated to Kdevelop 3 (gideon), when I create a project "Application Framework", use ReadOnlyPart and it is able to open URLs ( but I doesn't have success to extending it with BrowserExtension yet - the extension doesn't send the signal OpenURLRequest :- ( ).

So, just one more question:
Is KHTMLPart a obsolete object ?

Here's an output of my compilation of the tutorial (downloaded the full archive, etc):

make[1]: Entering directory `/repository/sources/kdetutorial-1.2/p4'
g++ -DHAVE_CONFIG_H -I. -I. -I.. -I/opt/kde/include 
-I/usr/lib/qt-3.1.2/include -I/usr/X11R6/include   
-DQT_THREAD_SUPPORT  -D_REENTRANT  -O2 
-fno-exceptions -fno-check-new  -c p4.cpp

g++ -DHAVE_CONFIG_H -I. -I. -I.. -I/opt/kde/include -I/usr/lib/qt-3.1.2/include -I/usr/X11R6/include   
-DQT_THREAD_SUPPORT  -D_REENTRANT  -O2 
-fno-exceptions -fno-check-new  -c main.cpp

/usr/lib/qt-3.1.2/bin/moc ./p4.h -o p4.moc.cpp

g++ -DHAVE_CONFIG_H -I. -I. -I.. -I/opt/kde/include -I/usr/lib/qt-3.1.2/include -I/usr/X11R6/include   
-DQT_THREAD_SUPPORT  -D_REENTRANT  -O2 
-fno-exceptions -fno-check-new  -c p4.moc.cpp

creating p4_meta_unload.cpp

g++ -DHAVE_CONFIG_H -I. -I. -I.. -I/opt/kde/include -I/usr/lib/qt-3.1.2/include-I/usr/X11R6/include   
-DQT_THREAD_SUPPORT  -D_REENTRANT  -O2 
-fno-exceptions -fno-check-new  -c p4_meta_unload.cpp

/bin/sh ../libtool --mode=link --tag=CXX g++  -O2 -fno-exceptions
 -fno-check-new  -L/usr/X11R6/lib -L/usr/lib/qt-3.1.2/lib 
-L/opt/kde/lib  -R /opt/kde/lib -R /usr/lib/qt-3.1.2/lib -R 
/usr/X11R6/lib -o p4  p4.o main.o p4.moc.o p4_meta_unload.o  
-lkhtml -lkdeui -lkdecore -lkio -lqt-mt  -lpng -lz -lm -lXext -lX11 
-lresolv -lSM -lICE -lpthread 

mkdir .libs

g++ -O2 -fno-exceptions -fno-check-new -o p4 p4.o main.o 
p4.moc.o p4_meta_unload.o  -L/usr/X11R6/lib 
-L/usr/lib/qt-3.1.2/lib -L/opt/kde/lib /opt/kde/lib/libkhtml.so 
-L/usr/lib/qt/lib -L/usr/lib/gcc-lib/i386-slackware-linux/3.2.2 
-L/usr/lib/gcc-lib/i386-slackware-linux/3.2.2/../../../../i386-slackware-linux/lib
 -L/usr/lib/gcc-lib/i386-slackware-linux/3.2.2/../../.. 
-L/usr/i386-slackware-linux/bin -L/usr/i386-slackware-linux/lib 
-ljpeg -L/usr/lib /opt/kde/lib/libkdeprint.so /opt/kde/lib/libkparts.so 
/opt/kde/lib/libkutils.so /opt/kde/lib/libkio.so /opt/kde/lib/libkdeui.so
 /opt/kde/lib/libkdesu.so /opt/kde/lib/libkdecore.so 
/opt/kde/lib/libDCOP.so -ldl -lXinerama /usr/lib/libart_lgpl_2.so 
/opt/kde/lib/libkdefx.so -lXrender -lutil /usr/lib/./libstdc++.so -lc 
-lgcc_s -lqt-mt -lpng -lz -lm -lXext -lX11 -lresolv -lSM -lICE 
-lpthread -Wl,--rpath -Wl,/opt/kde/lib -Wl,--rpath -Wl,/usr/lib/. 
-Wl,--rpath -Wl,/opt/kde/lib -Wl,--rpath -Wl,/usr/lib/. -Wl,--rpath 
-Wl,/usr/lib/qt-3.1.2/lib -Wl,--rpath -Wl,/usr/X11R6/lib -Wl,--rpath 
-Wl,/usr/lib/qt/lib

make[1]: Leaving directory `/repository/sources/kdetutorial-1.2/p4'

Youu can see that the linking command (the last one) is quite long. So what you need to add is probably something like {B] -L/opt/kde/lib /opt/kde/lib/libkhtml.so[/B] (if it's not enough, copy more).

Thanks again, Mara. I also successful compiled the tutorial like you. The problem is when I try to create my own project using Kdevelop ( I tried gideon an 2.15).

If you want a example I did exactly the follow:

- create I "Simple KDE Application" using kdevelop . (I used the name "Z" to my project)

- make and run it . OK. A dialog showing "Hello World" appeared. Until now it's fine

- Now, in the file z.h , I put the line:
#include <khtml_part.>

-and inside class definition:
public: KHTMLPart *browser;

- I buid it again and run. No problem.

- Now in the z.cpp I replace the lines:

#include <qlabel.h>
new QLabel( "Hello World", this, "hello label" );

for

#include <qvbox.h>
QVBox *vbox = new QVBox (this);

- I also put the line:
setCentralWidget (vbox);

- build the project again (to be sure that It's still running. OK, but now I got a empty dialog (of course, vbox isn't showing anything)

Now the real test:

- below the line "QVBox * vbox = new QVBox (this); " put :

browser = new KHTMLPart (vbox);

- Build it. Ops !!!

: undefined reference to `KHTMLPart::KHTMLPart[in-charge](QWidget*, char const*, QObject*, char const*, KHTMLPart::GUIProfile)'


This is my z.h
-----------------------------------------------------------------------------------------
*
* Copyright (C) 2003 Marcio Roger Ferrari,,, <mrogerf@darkstar>
*/

#ifndef _Z_H_
#define _Z_H_

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <kmainwindow.h>
#include <khtml_part.h>

/**
* @short Application Main Window
* @author Marcio Roger Ferrari,,, <mrogerf@darkstar>
* @version 0.1
*/
class z : public KMainWindow
{
Q_OBJECT
public:
/**
* Default Constructor
*/
z();

/**
* Default Destructor
*/
virtual ~z();

public: KHTMLPart *browser;
};

#endif // _Z_H_
---------------------------------------------------------------------------

this is my z.cpp
---------------------------------------------------------------------------
/*
* Copyright (C) 2003 Marcio Roger Ferrari,,, <mrogerf@darkstar>
*/

#include "z.h"

#include <qvbox.h>

#include <kmainwindow.h>
#include <klocale.h>

z::z()
: KMainWindow( 0, "z" )
{
// set the shell's ui resource file
setXMLFile("zui.rc");

QVBox *vbox = new QVBox (this);
browser = new KHTMLPart (vbox);

setCentralWidget(vbox);

}

z::~z()
{
}

#include "z.moc"

----------------------------------------------------------------------------

This problem doesn't make any sense for me :-( .

Hello...

I have been able to build it:

Just add in Project/ Project Options

In the menu Configure Options:

Linker Flags: -L /where/is/kde/lib/libkhtml.so

Michel

Thanks Drynish for your help. I did not try your solution yet, but I will do it soon.

Hi

I didn't ask for anything but I was very interested by this answer and I confirm that it is the right one.
I had exactly the same problem.