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Month: February 2011

ktexteditor/editorchooser_ui.cpp - error: invalid use of incomplete type ‘struct QLayoutWidget’

From: "David C. Rankin" <drankinatty@...>
Date: Mon, 14 Feb 2011 12:50:47 -0600
All,

  I'm rebuilding everything in a clean VM with gcc 4.5.2 for the gcc bug report
I have opened, and building kdelibs, I have run across an error I've never seen
before:

[ 72%] Building CXX object
interfaces/ktexteditor/CMakeFiles/ktexteditor-shared.dir/editorchooser_ui.cpp.o
cd /home/david/tbld/kdelibs/src/interfaces/ktexteditor && /usr/bin/c++
-Dktexteditor_shared_EXPORTS -DHAVE_CONFIG_H -DUSE_QT3 -DQT_NO_ASCII_CAST
-DQT_CLEAN_NAMESPACE -DQT_NO_STL -DQT_NO_COMPAT -DQT_NO_TRANSLATION
-DQT_THREAD_SUPPORT -D_REENTRANT -march=x86-64 -mtune=generic -O2 -pipe
-include tqt.h -fPIC -I/opt/qt/include -I/opt/qt/include/tqt
-I/home/david/tbld/kdelibs/src/interfaces/ktexteditor
-I/home/david/tbld/kdelibs/src -I/home/david/tbld/kdelibs/interfaces/ktexteditor
-I/home/david/tbld/kdelibs/src/kdecore -I/home/david/tbld/kdelibs/src/kabc
-I/home/david/tbld/kdelibs -I/home/david/tbld/kdelibs/dcop
-I/home/david/tbld/kdelibs/kdecore -I/home/david/tbld/kdelibs/kdeui
-I/home/david/tbld/kdelibs/kio -I/home/david/tbld/kdelibs/kio/kio
-I/home/david/tbld/kdelibs/kabc -I/home/david/tbld/kdelibs/interfaces   -o
CMakeFiles/ktexteditor-shared.dir/editorchooser_ui.cpp.o -c
/home/david/tbld/kdelibs/src/interfaces/ktexteditor/editorchooser_ui.cpp
/home/david/tbld/kdelibs/src/interfaces/ktexteditor/editorchooser_ui.cpp: In
constructor ‘EditorChooser_UI::EditorChooser_UI(QWidget*, const char*)’:
/home/david/tbld/kdelibs/src/interfaces/ktexteditor/editorchooser_ui.cpp:33:51:
error: invalid use of incomplete type ‘struct QLayoutWidget’
/home/david/tbld/kdelibs/src/interfaces/ktexteditor/editorchooser_ui.h:19:7:
error: forward declaration of ‘struct QLayoutWidget’
/home/david/tbld/kdelibs/src/interfaces/ktexteditor/editorchooser_ui.cpp:34:109:
error: no matching function for call to
‘QVBoxLayout::QVBoxLayout(QLayoutWidget*&, int, int, const char [14])’
/opt/qt/include/qlayout.h:464:5: note: candidates are:
QVBoxLayout::QVBoxLayout(const QVBoxLayout&)
/opt/qt/include/qlayout.h:458:5: note:
QVBoxLayout::QVBoxLayout(int, const char*)
/opt/qt/include/qlayout.h:456:5: note:
QVBoxLayout::QVBoxLayout(QLayout*, int, const char*)
/opt/qt/include/qlayout.h:454:5: note:
QVBoxLayout::QVBoxLayout(QWidget*, int, int, const char*)
/home/david/tbld/kdelibs/src/interfaces/ktexteditor/editorchooser_ui.cpp:36:53:
error: invalid use of incomplete type ‘struct QLabel’
/home/david/tbld/kdelibs/src/interfaces/ktexteditor/editorchooser_ui.h:20:7:
error: forward declaration of ‘struct QLabel’
/home/david/tbld/kdelibs/src/interfaces/ktexteditor/editorchooser_ui.cpp:37:15:
error: invalid use of incomplete type ‘struct QLabel’
/home/david/tbld/kdelibs/src/interfaces/ktexteditor/editorchooser_ui.h:20:7:
error: forward declaration of ‘struct QLabel’
/home/david/tbld/kdelibs/src/interfaces/ktexteditor/editorchooser_ui.cpp:38:15:
error: invalid use of incomplete type ‘struct QLabel’
/home/david/tbld/kdelibs/src/interfaces/ktexteditor/editorchooser_ui.h:20:7:
error: forward declaration of ‘struct QLabel’
/home/david/tbld/kdelibs/src/interfaces/ktexteditor/editorchooser_ui.cpp:38:38:
error: incomplete type ‘QLabel’ used in nested name specifier
/home/david/tbld/kdelibs/src/interfaces/ktexteditor/editorchooser_ui.cpp:38:59:
error: incomplete type ‘QLabel’ used in nested name specifier
/home/david/tbld/kdelibs/src/interfaces/ktexteditor/editorchooser_ui.cpp:38:83:
error: incomplete type ‘QLabel’ used in nested name specifier
/home/david/tbld/kdelibs/src/interfaces/ktexteditor/editorchooser_ui.cpp:39:42:
error: no matching function for call to ‘QVBoxLayout::addWidget(QLabel*&)’
/opt/qt/include/qlayout.h:386:10: note: candidate is: void
QBoxLayout::addWidget(QWidget*, int, int)
/home/david/tbld/kdelibs/src/interfaces/ktexteditor/editorchooser_ui.cpp:41:58:
error: invalid use of incomplete type ‘struct QComboBox’
/home/david/tbld/kdelibs/src/interfaces/ktexteditor/editorchooser_ui.h:21:7:
error: forward declaration of ‘struct QComboBox’
/home/david/tbld/kdelibs/src/interfaces/ktexteditor/editorchooser_ui.cpp:42:43:
error: no matching function for call to ‘QVBoxLayout::addWidget(QComboBox*&)’
/opt/qt/include/qlayout.h:386:10: note: candidate is: void
QBoxLayout::addWidget(QWidget*, int, int)
/home/david/tbld/kdelibs/src/interfaces/ktexteditor/editorchooser_ui.cpp:43:45:
error: no matching function for call to ‘QVBoxLayout::addWidget(QLayoutWidget*&)’
/opt/qt/include/qlayout.h:386:10: note: candidate is: void
QBoxLayout::addWidget(QWidget*, int, int)
/home/david/tbld/kdelibs/src/interfaces/ktexteditor/editorchooser_ui.cpp: In
member function ‘virtual void EditorChooser_UI::languageChange()’:
/home/david/tbld/kdelibs/src/interfaces/ktexteditor/editorchooser_ui.cpp:66:15:
error: invalid use of incomplete type ‘struct QLabel’
/home/david/tbld/kdelibs/src/interfaces/ktexteditor/editorchooser_ui.h:20:7:
error: forward declaration of ‘struct QLabel’
make[2]: ***
[interfaces/ktexteditor/CMakeFiles/ktexteditor-shared.dir/editorchooser_ui.cpp.o] Error
1
make[2]: Leaving directory `/home/david/tbld/kdelibs/src'
make[1]: *** [interfaces/ktexteditor/CMakeFiles/ktexteditor-shared.dir/all] Error 2
make[1]: Leaving directory `/home/david/tbld/kdelibs/src'
make: *** [all] Error 2
    Aborting...

Is this possibly related to the gcc problem I've had with gcc 4.5.2 that I need
to report to gcc, or does this look like a problem with QBoxLayout?

-- 
David C. Rankin, J.D.,P.E.