Talk:Development/Tutorials/Saving and loading - Revision history

Simonknight6600 at 16:18, 14 April 2008

2008-04-14T16:18:56Z

Milliams: /* Solution for "undefined reference to `vtable for MainWindow'" */

2008-04-14T14:02:59Z

‎Solution for "undefined reference to `vtable for MainWindow'"

Tampakrap: /* Solution for "undefined reference to `vtable for MainWindow'" */ new section

2008-04-12T13:12:24Z

‎Solution for "undefined reference to `vtable for MainWindow'": new section

Milliams: /* Compiling failed due to 'undefined reference to vtable ...' */

2008-03-22T14:00:28Z

‎Compiling failed due to 'undefined reference to vtable ...'

Tampakrap: Corrected my own error from before, vtables fixed!

2008-03-16T07:05:46Z

Corrected my own error from before, vtables fixed!

Tampakrap: Added the necessary line for the vtable fix

2008-03-16T02:48:31Z

Added the necessary line for the vtable fix

Tampakrap: Fix for undefined reference to vtable compiling error

2008-03-16T02:33:17Z

Fix for undefined reference to vtable compiling error

New page

== Compiling failed due to 'undefined reference to vtable ...' ==
When compiling, cmake failed during the linking process.
<code>
undefined reference to `vtable for MainWindow'
</code>

Simply add the following line to the mainwindow.cpp:
<code>
#include "mainwindow.moc"
</code>

I don't exactly know why this happens to me, but I suspect the fact that I have not built any special environment for working on KDE4 applications (as described [[Getting_Started/Set_up_KDE_4_for_development#KDevelop|here]].

Can someone who understands the process please add the appropriate steps to the main tutorial?

← Older revision		Revision as of 16:18, 14 April 2008
Line 31:		Line 31:

	: You shouldn't need to use <tt>qt4_automoc()</tt> at all. With the code copied verbatim from the tutorial it builds just fine. The <tt>kde4_add_executable()</tt> does all that magic itself. According to Thiago, "If kde4automoc [<em>which is called by kde4_add_executable() I believe</em>] finds a header with Q_OBJECT whose .moc isn't included anywhere, it'll include that from a .cpp" --[[User:Milliams\|milliams]] 16:02, 14 April 2008 (CEST)		: You shouldn't need to use <tt>qt4_automoc()</tt> at all. With the code copied verbatim from the tutorial it builds just fine. The <tt>kde4_add_executable()</tt> does all that magic itself. According to Thiago, "If kde4automoc [<em>which is called by kde4_add_executable() I believe</em>] finds a header with Q_OBJECT whose .moc isn't included anywhere, it'll include that from a .cpp" --[[User:Milliams\|milliams]] 16:02, 14 April 2008 (CEST)
		+
		+	:: Thank you very much. I used the KDevelop cmake template to create my project and the CMakeLists.txt used add_executable() instead of kde4_add_executable(). Problem solved :-) --[[User:Simonknight6600\|Simon Schweiger]] 18:18, 14 April 2008 (CEST)

← Older revision		Revision as of 14:02, 14 April 2008
Line 29:		Line 29:

	This fixed the problem for me. Please try this and post your results so I can correct the tutorial.		This fixed the problem for me. Please try this and post your results so I can correct the tutorial.
		+
		+	: You shouldn't need to use <tt>qt4_automoc()</tt> at all. With the code copied verbatim from the tutorial it builds just fine. The <tt>kde4_add_executable()</tt> does all that magic itself. According to Thiago, "If kde4automoc [<em>which is called by kde4_add_executable() I believe</em>] finds a header with Q_OBJECT whose .moc isn't included anywhere, it'll include that from a .cpp" --[[User:Milliams\|milliams]] 16:02, 14 April 2008 (CEST)

← Older revision		Revision as of 13:12, 12 April 2008
Line 13:		Line 13:
	Tiny hint: if you quickly want to copy the source displayed in this tutorial, but are as annoyed as I am about the line numbering which is copied as well, use the edit function of this site to access the (barebone) sourcecode.		Tiny hint: if you quickly want to copy the source displayed in this tutorial, but are as annoyed as I am about the line numbering which is copied as well, use the edit function of this site to access the (barebone) sourcecode.
	: I just tested this with Konq, Firefox and Opera and none of them copied the line numbering. What browser are you using? --[[User:Milliams\|milliams]] 15:00, 22 March 2008 (CET)		: I just tested this with Konq, Firefox and Opera and none of them copied the line numbering. What browser are you using? --[[User:Milliams\|milliams]] 15:00, 22 March 2008 (CET)
		+
		+	== Solution for "undefined reference to `vtable for MainWindow'" ==
		+
		+	When I tried to compile the code, I got the same error:
		+
		+	<code>undefined reference to `vtable for MainWindow'</code>
		+
		+	This is because you have to change CMakeLists.txt in order to generate .moc files. Just add this line:
		+
		+	<code>qt4_automoc(${tutorial4_SRCS})</code>
		+
		+	Then you also have to add this line at the bottom of mainwindow.cpp:
		+
		+	<code>#include "mainwindow.moc"</code>
		+
		+	This fixed the problem for me. Please try this and post your results so I can correct the tutorial.

← Older revision		Revision as of 14:00, 22 March 2008
Line 12:		Line 12:

	Tiny hint: if you quickly want to copy the source displayed in this tutorial, but are as annoyed as I am about the line numbering which is copied as well, use the edit function of this site to access the (barebone) sourcecode.		Tiny hint: if you quickly want to copy the source displayed in this tutorial, but are as annoyed as I am about the line numbering which is copied as well, use the edit function of this site to access the (barebone) sourcecode.
		+	: I just tested this with Konq, Firefox and Opera and none of them copied the line numbering. What browser are you using? --[[User:Milliams\|milliams]] 15:00, 22 March 2008 (CET)

@@ Line 5: / Line 5: @@
 </code>
-Simply add the following line to the mainwindow.cpp:
+I received this error, after making one tiny mistake: I named my headerfile
-<code>
+<code>mainwindow.hpp</code>
-#include "mainwindow.moc"
+instead of
-</code>
+<code>mainwindow.h</code>
-Also add this line to your CMakeLists.txt near the top:
+Tiny hint: if you quickly want to copy the source displayed in this tutorial, but are as annoyed as I am about the line numbering which is copied as well, use the edit function of this site to access the (barebone) sourcecode.
-<code>
-include (KDE4Defaults)
-</code>
-−
-I don't exactly know why this happens to me, but I suspect the fact that I have not built any special environment for working on KDE4 applications (as described [[Getting_Started/Set_up_KDE_4_for_development#KDevelop|here]].
-−
-Can someone who understands the process please add the appropriate steps to the main tutorial?