CGAL users discussion list

Hi all,

I'm a beginner encountering a linker problem ewhen I try to build the demo 
program for "Qt_widget" and some other demos which involve Qt.

There is linker problem between the libraries CGALQt-vc80-mt-gd.lib and 
qt-mt3.lib. I'm using CGAL 3.3 and Qt3.3. Any suggestion in troubleshooting 
the error below? I would really appreciate your help. Thanks a lot!

Regards,
Like


------ Build started: Project: standard_toolbar, Configuration: Debug Win32 
------
Performing Pre-Build Event...
Compiling...
standard_toolbar.cpp
c:\program files\cgal-3.3\include\cgal\float.h(133) : warning C4244: 'return' 
: conversion from 'double' to 'float', possible loss of data
Linking...
CGALQt-vc80-mt-gd.lib(Qt_widget_standard_toolbar.obj) : error LNK2005: 
"public: __thiscall QString::~QString(void)" 
(??1QString@@QAE@XZ)
 already defined in qt-mt3.lib(qt-mt3.dll)
CGALQt-vc80-mt-gd.lib(Qt_widget_standard_toolbar.obj) : error LNK2005: 
"public: virtual void __thiscall QWidget::setGeometry(class QRect const &)" 
(?setGeometry@QWidget@@UAEXABVQRect@@@Z)
 already defined in qt-mt3.lib(qt-mt3.dll)
CGALQt-vc80-mt-gd.lib(Qt_widget_standard_toolbar.obj) : error LNK2005: 
"public: int __thiscall QRect::width(void)const " 
(?width@QRect@@QBEHXZ)
 already defined in qt-mt3.lib(qt-mt3.dll)
CGALQt-vc80-mt-gd.lib(Qt_widget_standard_toolbar.obj) : error LNK2005: 
"public: int __thiscall QRect::height(void)const " 
(?height@QRect@@QBEHXZ)
 already defined in qt-mt3.lib(qt-mt3.dll)
CGALQt-vc80-mt-gd.lib(Qt_widget_standard_toolbar.obj) : error LNK2005: 
"protected: virtual void __thiscall QWidget::setWState(unsigned int)" 
(?setWState@QWidget@@MAEXI@Z)
 already defined in qt-mt3.lib(qt-mt3.dll)
CGALQt-vc80-mt-gd.lib(Qt_widget_standard_toolbar.obj) : error LNK2005: 
"protected: virtual void __thiscall QWidget::setWFlags(unsigned int)" 
(?setWFlags@QWidget@@MAEXI@Z)
 already defined in qt-mt3.lib(qt-mt3.dll)
CGALQt-vc80-mt-gd.lib(Qt_widget_standard_toolbar.obj) : error LNK2005: 
"public: class QColor const & __thiscall QPen::color(void)const " 
(?color@QPen@@QBEABVQColor@@XZ)
 already defined in qt-mt3.lib(qt-mt3.dll)
CGALQt-vc80-mt-gd.lib(Qt_widget_standard_toolbar.obj) : error LNK2005: 
"public: class QPen const & __thiscall QPainter::pen(void)const " 
(?pen@QPainter@@QBEABVQPen@@XZ)
 already defined in qt-mt3.lib(qt-mt3.dll)
CGALQt-vc80-mt-gd.lib(Qt_widget_standard_toolbar.obj) : error LNK2005: 
"public: class QBrush const & __thiscall QPainter::brush(void)const " 
(?brush@QPainter@@QBEABVQBrush@@XZ)
 already defined in qt-mt3.lib(qt-mt3.dll)
CGALQt-vc80-mt-gd.lib(Qt_widget_standard_toolbar.obj) : error LNK2005: "int 
__cdecl qstrcmp(char const *,char const *)" 
(?qstrcmp@@YAHPBD0@Z)
 already defined in qt-mt3.lib(qt-mt3.dll)
CGALQt-vc80-mt-gd.lib(Qt_widget_standard_toolbar.obj) : error LNK2005: 
"public: int __thiscall QMetaObject::slotOffset(void)const " 
(?slotOffset@QMetaObject@@QBEHXZ)
 already defined in qt-mt3.lib(qt-mt3.dll)
CGALQt-vc80-mt-gd.lib(Qt_widget.obj) : error LNK2005: "public: __thiscall 
QString::~QString(void)" 
(??1QString@@QAE@XZ)
 already defined in qt-mt3.lib(qt-mt3.dll)
CGALQt-vc80-mt-gd.lib(Qt_widget.obj) : error LNK2005: "public: virtual void 
__thiscall QWidget::setGeometry(class QRect const &)" 
(?setGeometry@QWidget@@UAEXABVQRect@@@Z)
 already defined in qt-mt3.lib(qt-mt3.dll)
CGALQt-vc80-mt-gd.lib(Qt_widget.obj) : error LNK2005: "public: int __thiscall 
QRect::width(void)const " 
(?width@QRect@@QBEHXZ)
 already defined in qt-mt3.lib(qt-mt3.dll)
CGALQt-vc80-mt-gd.lib(Qt_widget.obj) : error LNK2005: "public: int __thiscall 
QRect::height(void)const " 
(?height@QRect@@QBEHXZ)
 already defined in qt-mt3.lib(qt-mt3.dll)
CGALQt-vc80-mt-gd.lib(Qt_widget.obj) : error LNK2005: "protected: virtual 
void __thiscall QWidget::setWState(unsigned int)" 
(?setWState@QWidget@@MAEXI@Z)
 already defined in qt-mt3.lib(qt-mt3.dll)
CGALQt-vc80-mt-gd.lib(Qt_widget.obj) : error LNK2005: "protected: virtual 
void __thiscall QWidget::setWFlags(unsigned int)" 
(?setWFlags@QWidget@@MAEXI@Z)
 already defined in qt-mt3.lib(qt-mt3.dll)
CGALQt-vc80-mt-gd.lib(Qt_widget.obj) : error LNK2005: "public: class QRect 
const & __thiscall QWidget::geometry(void)const " 
(?geometry@QWidget@@QBEABVQRect@@XZ)
 already defined in qt-mt3.lib(qt-mt3.dll)
CGALQt-vc80-mt-gd.lib(Qt_widget.obj) : error LNK2005: "public: class QPen 
const & __thiscall QPainter::pen(void)const " 
(?pen@QPainter@@QBEABVQPen@@XZ)
 already defined in qt-mt3.lib(qt-mt3.dll)
CGALQt-vc80-mt-gd.lib(Qt_widget.obj) : error LNK2005: "public: class QBrush 
const & __thiscall QPainter::brush(void)const " 
(?brush@QPainter@@QBEABVQBrush@@XZ)
 already defined in qt-mt3.lib(qt-mt3.dll)
CGALQt-vc80-mt-gd.lib(Qt_widget.obj) : error LNK2005: "int __cdecl 
qstrcmp(char const *,char const *)" 
(?qstrcmp@@YAHPBD0@Z)
 already defined in qt-mt3.lib(qt-mt3.dll)
CGALQt-vc80-mt-gd.lib(Qt_widget.obj) : error LNK2005: "public: int __thiscall 
QMetaObject::slotOffset(void)const " 
(?slotOffset@QMetaObject@@QBEHXZ)
 already defined in qt-mt3.lib(qt-mt3.dll)
CGALQt-vc80-mt-gd.lib(Qt_widget_history.obj) : error LNK2005: "int __cdecl 
qstrcmp(char const *,char const *)" 
(?qstrcmp@@YAHPBD0@Z)
 already defined in qt-mt3.lib(qt-mt3.dll)
CGALQt-vc80-mt-gd.lib(Qt_widget_history.obj) : error LNK2005: "public: int 
__thiscall QMetaObject::slotOffset(void)const " 
(?slotOffset@QMetaObject@@QBEHXZ)
 already defined in qt-mt3.lib(qt-mt3.dll)
CGALQt-vc80-mt-gd.lib(Qt_widget_layer.obj) : error LNK2005: "int __cdecl 
qstrcmp(char const *,char const *)" 
(?qstrcmp@@YAHPBD0@Z)
 already defined in qt-mt3.lib(qt-mt3.dll)
CGALQt-vc80-mt-gd.lib(Qt_widget_layer.obj) : error LNK2005: "public: int 
__thiscall QMetaObject::slotOffset(void)const " 
(?slotOffset@QMetaObject@@QBEHXZ)
 already defined in qt-mt3.lib(qt-mt3.dll)
MSVCRTD.lib(cinitexe.obj) : warning LNK4098: defaultlib 'msvcrt.lib' 
conflicts with use of other libs; use /NODEFAULTLIB:library
CGALQt-vc80-mt-gd.lib(Qt_widget_standard_toolbar.obj) : error LNK2001: 
unresolved external symbol "struct QUType_int static_QUType_int" 
(?static_QUType_int@@3UQUType_int@@A)
CGALQt-vc80-mt-gd.lib(Qt_widget_layer.obj) : error LNK2001: unresolved 
external symbol "struct QUType_int static_QUType_int" 
(?static_QUType_int@@3UQUType_int@@A)
CGALQt-vc80-mt-gd.lib(Qt_widget_standard_toolbar.obj) : error LNK2001: 
unresolved external symbol "private: static struct QStringData * 
QString::shared_null" 
(?shared_null@QString@@0PAUQStringData@@A)
CGALQt-vc80-mt-gd.lib(Qt_widget.obj) : error LNK2001: unresolved external 
symbol "private: static struct QStringData * QString::shared_null" 
(?shared_null@QString@@0PAUQStringData@@A)
CGALQt-vc80-mt-gd.lib(Qt_widget_standard_toolbar.obj) : error LNK2001: 
unresolved external symbol "public: static class QColor & Qt::green" 
(?green@Qt@@2AAVQColor@@A)
CGALQt-vc80-mt-gd.lib(Qt_widget_standard_toolbar.obj) : error LNK2001: 
unresolved external symbol "public: static class QCursor & Qt::crossCursor" 
(?crossCursor@Qt@@2AAVQCursor@@A)
CGALQt-vc80-mt-gd.lib(Qt_widget_standard_toolbar.obj) : error LNK2001: 
unresolved external symbol "class QApplication * qApp" 
(?qApp@@3PAVQApplication@@A)
CGALQt-vc80-mt-gd.lib(Qt_widget.obj) : error LNK2019: unresolved external 
symbol "class QApplication * qApp" (?qApp@@3PAVQApplication@@A) referenced in 
function "protected: virtual void __thiscall 
CGAL::Qt_widget::keyReleaseEvent(class QKeyEvent *)" 
(?keyReleaseEvent@Qt_widget@CGAL@@MAEXPAVQKeyEvent@@@Z)
CGALQt-vc80-mt-gd.lib(Qt_widget_history.obj) : error LNK2001: unresolved 
external symbol "class QApplication * qApp" (?qApp@@3PAVQApplication@@A)
CGALQt-vc80-mt-gd.lib(Qt_widget_layer.obj) : error LNK2001: unresolved 
external symbol "class QApplication * qApp" (?qApp@@3PAVQApplication@@A)
CGALQt-vc80-mt-gd.lib(Qt_widget.obj) : error LNK2001: unresolved external 
symbol "struct QUType_ptr static_QUType_ptr" 
(?static_QUType_ptr@@3UQUType_ptr@@A)
CGALQt-vc80-mt-gd.lib(Qt_widget_layer.obj) : error LNK2001: unresolved 
external symbol "struct QUType_ptr static_QUType_ptr" 
(?static_QUType_ptr@@3UQUType_ptr@@A)
CGALQt-vc80-mt-gd.lib(Qt_widget.obj) : error LNK2001: unresolved external 
symbol "struct QUType_bool static_QUType_bool" 
(?static_QUType_bool@@3UQUType_bool@@A)
CGALQt-vc80-mt-gd.lib(Qt_widget_history.obj) : error LNK2001: unresolved 
external symbol "struct QUType_bool static_QUType_bool" 
(?static_QUType_bool@@3UQUType_bool@@A)
CGALQt-vc80-mt-gd.lib(Qt_widget_layer.obj) : error LNK2001: unresolved 
external symbol "struct QUType_bool static_QUType_bool" 
(?static_QUType_bool@@3UQUType_bool@@A)
CGALQt-vc80-mt-gd.lib(Qt_widget.obj) : error LNK2001: unresolved external 
symbol "public: static class QColor & Qt::black" 
(?black@Qt@@2AAVQColor@@A)
CGALQt-vc80-mt-gd.lib(Qt_widget.obj) : error LNK2001: unresolved external 
symbol "public: static class QColor & Qt::white" 
(?white@Qt@@2AAVQColor@@A)
CGALQt-vc80-mt-gd.lib(Qt_widget.obj) : error LNK2001: unresolved external 
symbol "struct QUType_Null static_QUType_Null" 
(?static_QUType_Null@@3UQUType_Null@@A)
CGALQt-vc80-mt-gd.lib(Qt_widget_layer.obj) : error LNK2001: unresolved 
external symbol "struct QUType_Null static_QUType_Null" 
(?static_QUType_Null@@3UQUType_Null@@A)
Debug/standard_toolbar.exe : fatal error LNK1120: 10 unresolved externals
Build log was saved at "file://c:\Program 
Files\CGAL-3.3\demo\Qt_widget\Debug\BuildLog.htm"
standard_toolbar - 46 error(s), 2 warning(s)
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========