compilation error

Talk2amulya,
i added those .prf files to my makefile and i compiled that application still it is giving same error. what might be the problem?

Actualy i tried to give reply directly with ur last post but i am not able to write on the site,so i created new thread.plz excuse me.

thank u.

did you try to install Qt in another directory/drive etc?

just now i am trying to do that.i will let u know after installing qt on another drive Spirit.

thank u.

Spirit,
Even after installing on different directory is also creating same problem.

Code:

---

tmp/obj/debug_shared/hello.o(.text+0x158): In function `Z5qMainiPPc':
F:/Qt/4.4.3/hello/hello.cpp:5: undefined reference to `_imp___ZN12QApplicationC1
ERiPPci'
tmp/obj/debug_shared/hello.o(.text+0x1ec):F:/Qt/4.4.3/hello/hello.cpp:6: undefin
ed reference to `_imp___ZN6QLabelC1ERK7QStringP7QWidget6QFlagsIN2Qt10WindowTypeE
E'
tmp/obj/debug_shared/hello.o(.text+0x2b2):F:/Qt/4.4.3/hello/hello.cpp:8: undefin
ed reference to `_imp___ZN12QApplication4execEv'
tmp/obj/debug_shared/hello.o(.text+0x2cf):F:/Qt/4.4.3/hello/hello.cpp:8: undefin
ed reference to `QApplication::~QApplication()'
tmp/obj/debug_shared/hello.o(.text+0x2fe):F:/Qt/4.4.3/hello/hello.cpp:8: undefin
ed reference to `QApplication::~QApplication()'
tmp/obj/debug_shared/hello.o(.text$_ZN7QStringD1Ev[QString::~QString()]+0x20): I
n function `ZSt3minIjERKT_S2_S2_':
F:/Qt/4.4.3/hello/../include/QtCore/../../src/corelib/tools/qstring.h: undefined
 reference to `_imp___ZN7QString4freeEPNS_4DataE'
tmp/obj/debug_shared/hello.o(.text$_ZN7QStringC1EPKc[QString::QString(char const
*)]+0x19):F:/Qt/4.4.3/hello/../include/QtCore/../../src/corelib/tools/qstring.h:
 undefined reference to `_imp___ZN7QString16fromAscii_helperEPKci'
/mingw/lib/libmingw32.a(main.o)(.text+0x106):main.c: undefined reference to `Win
Main@16'
collect2: ld returned 1 exit status
mingw32-make[1]: *** [debug\hello.exe] Error 1
mingw32-make[1]: Leaving directory `F:/Qt/4.4.3/hello'
mingw32-make: *** [debug-all] Error 2

---

this is the problem,what should i do?

did you try to build Qt's examples?

Spirit,
I am trying to compile this simple code:
#include <QApplication>
#include <QLabel>
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
QLabel *label = new QLabel("Hello Qt!");
label->show();
return app.exec();
}
this simple application is not compiling then how can i expect examples will compile properly.

so, I would like to know: did you build Qt manually or installed already built Qt?

I have not understood ur question properly.what i did is i uninstalled previously installed qt and again i installed qt in "F" directory by specifying MinGw path in sam "F" directory only.as i am windows user simply followed the instructions which i got after double clicking the qt software.

got it. so, try to build Qt by yourself using Qt's configure tool.

how to do that?
Can u specify steps involved on that configuration?

read this and also INSTALL file in QTDIR.

i just configured qt and tried again by compiling application,still problem not rectified.

do mingw32-make clean and then repeat configure process.
and also check your QTDIR, QMAKESPEC, INCLUDE, LIB and PATH variable they mast containt correct values.

How to do mingw-32-make clean?
I think these r the steps i need to follow:
After open the Qt command prompt, i just need to enter "mingw-32-make clean".
once the above step has been finished i have to give "configure" again.

Am i correct spirit or is there any thing else?

yes, this should be enough.

I have done what u mentioned in ur last post spirit.
These are my directories setting to the paths:

Setting up a MinGW/Qt only environment...
-- QTDIR set to F:\Qt\4.4.3
-- PATH set to F:\Qt\4.4.3\bin
-- Adding F:\MinGW\bin to PATH
-- Adding C:\WINDOWS\System32 to PATH
-- QMAKESPEC set to win32-g++

still the example is not compiling?

note: while configuring my qt, i got on pop up from my system that states qmake.exe file is corrupted and it is unreadable. What does it mean.

As u told i am installing my QT on "F" directory.

okay, try to rebuild qmake, go to QTDIR/qmake and run mingw32-make.
btw, after Qt configuration you had to run mingw32-make. did you do this? only after that process of building will be started and it takes from 1 to 5 hours (the compilation time depents of your hardware configuration).
PS. if you will not reach successful result I'll record a video man for you how to build Qt. :)

after giving "mingw32-make" in QTDIR/qmake,the response is this:

mingw32-make: `qmake.exe' is up to date.

now i gave mingw32-make in my QTDIR, as per ur last post it may take 5hrs time,Am i right spirit?

one more thing spirit,
When i installed QT 2months back in my previous company,I have not followed these many steps.Simply installing MINGW and installed qt by double clicking on software.then i executed example and even i developed projects also.But now i shifted to another company and i am trying to execute simple code it is not working properly.
you are telling so many steps to work QT properly,Do you know what is the problem spirit.
I think the problem is related to OS or system related, Am i right or not?

Spirit,
i got these error when i gave "mingw32-make" command:

Quote:

---

F:/Qt/4.4.3/src/corelib/io/qfsfileengine_win.cpp:1449: undefined reference to `C
oCreateInstance@20'
./tmp\obj\debug_shared\qfsfileengine_win.o(.text+0xa 2b2):F:/Qt/4.4.3/src/corelib
/io/qfsfileengine_win.cpp:1449: undefined reference to `CoInitialize@4'
./tmp\obj\debug_shared\qfsfileengine_win.o(.text+0xa 2e0):F:/Qt/4.4.3/src/corelib
/io/qfsfileengine_win.cpp:1449: undefined reference to `CoCreateInstance@20'
./tmp\obj\debug_shared\qfsfileengine_win.o(.text+0xa 307):F:/Qt/4.4.3/src/corelib
/io/qfsfileengine_win.cpp:1449: undefined reference to `IID_IPersistFile'
./tmp\obj\debug_shared\qfsfileengine_win.o(.text+0xa 49b):F:/Qt/4.4.3/src/corelib
/io/qfsfileengine_win.cpp:1449: undefined reference to `CoUninitialize@0'
./tmp\obj\debug_shared\qfsfileengine_win.o(.text+0xa 4dc):F:/Qt/4.4.3/src/corelib
/io/qfsfileengine_win.cpp:1449: undefined reference to `CoCreateInstance@20'
./tmp\obj\debug_shared\qfsfileengine_win.o(.text+0xa 4fb):F:/Qt/4.4.3/src/corelib
/io/qfsfileengine_win.cpp:1449: undefined reference to `CoInitialize@4'
./tmp\obj\debug_shared\qfsfileengine_win.o(.text+0xa 52c):F:/Qt/4.4.3/src/corelib
/io/qfsfileengine_win.cpp:1449: undefined reference to `CoCreateInstance@20'
./tmp\obj\debug_shared\qfsfileengine_win.o(.text+0xa 553):F:/Qt/4.4.3/src/corelib
/io/qfsfileengine_win.cpp:1449: undefined reference to `IID_IPersistFile'
./tmp\obj\debug_shared\qfsfileengine_win.o(.text+0xa 7d8):F:/Qt/4.4.3/src/corelib
/io/qfsfileengine_win.cpp:1449: undefined reference to `CoUninitialize@0'
./tmp\obj\debug_shared\qfsfileengine_win.o(.text+0xa 829):F:/Qt/4.4.3/src/corelib
/io/qfsfileengine_win.cpp:1449: undefined reference to `CoCreateInstance@20'
./tmp\obj\debug_shared\qfsfileengine_win.o(.text+0xa 848):F:/Qt/4.4.3/src/corelib
/io/qfsfileengine_win.cpp:1449: undefined reference to `CoInitialize@4'
./tmp\obj\debug_shared\qfsfileengine_win.o(.text+0xa 879):F:/Qt/4.4.3/src/corelib
/io/qfsfileengine_win.cpp:1449: undefined reference to `CoCreateInstance@20'
./tmp\obj\debug_shared\qfsfileengine_win.o(.text+0xa 8a0):F:/Qt/4.4.3/src/corelib
/io/qfsfileengine_win.cpp:1449: undefined reference to `IID_IPersistFile'
./tmp\obj\debug_shared\qfsfileengine_win.o(.text+0xa a37):F:/Qt/4.4.3/src/corelib
/io/qfsfileengine_win.cpp:1449: undefined reference to `CoUninitialize@0'
./tmp\obj\debug_shared\qfsfileengine_win.o(.text+0xa a78):F:/Qt/4.4.3/src/corelib
/io/qfsfileengine_win.cpp:1449: undefined reference to `CoCreateInstance@20'
./tmp\obj\debug_shared\qfsfileengine_win.o(.text+0xa a97):F:/Qt/4.4.3/src/corelib
/io/qfsfileengine_win.cpp:1449: undefined reference to `CoInitialize@4'
./tmp\obj\debug_shared\qfsfileengine_win.o(.text+0xa ac8):F:/Qt/4.4.3/src/corelib
/io/qfsfileengine_win.cpp:1449: undefined reference to `CoCreateInstance@20'
./tmp\obj\debug_shared\qfsfileengine_win.o(.text+0xa aef):F:/Qt/4.4.3/src/corelib
/io/qfsfileengine_win.cpp:1449: undefined reference to `IID_IPersistFile'
./tmp\obj\debug_shared\qfsfileengine_win.o(.text+0xa df3):F:/Qt/4.4.3/src/corelib
/io/qfsfileengine_win.cpp:1449: undefined reference to `CoUninitialize@0'
./tmp\obj\debug_shared\qfsfileengine_win.o(.text+0xa f38): In function `ZN13QFSFi
leEngine4linkERK7QString':
F:/Qt/4.4.3/src/corelib/io/qfsfileengine_win.cpp:1556: undefined reference to `C
oCreateInstance@20'
./tmp\obj\debug_shared\qfsfileengine_win.o(.text+0xa f57):F:/Qt/4.4.3/src/corelib
/io/qfsfileengine_win.cpp:1556: undefined reference to `CoInitialize@4'
./tmp\obj\debug_shared\qfsfileengine_win.o(.text+0xa f85):F:/Qt/4.4.3/src/corelib
/io/qfsfileengine_win.cpp:1556: undefined reference to `CoCreateInstance@20'
./tmp\obj\debug_shared\qfsfileengine_win.o(.text+0xb 1e1):F:/Qt/4.4.3/src/corelib
/io/qfsfileengine_win.cpp:1556: undefined reference to `IID_IPersistFile'
./tmp\obj\debug_shared\qfsfileengine_win.o(.text+0xb 289):F:/Qt/4.4.3/src/corelib
/io/qfsfileengine_win.cpp:1556: undefined reference to `CoUninitialize@0'
./tmp\obj\debug_shared\qfsfileengine_win.o(.text+0xb 35c):F:/Qt/4.4.3/src/corelib
/io/qfsfileengine_win.cpp:1556: undefined reference to `CoCreateInstance@20'
./tmp\obj\debug_shared\qfsfileengine_win.o(.text+0xb 37b):F:/Qt/4.4.3/src/corelib
/io/qfsfileengine_win.cpp:1556: undefined reference to `CoInitialize@4'
./tmp\obj\debug_shared\qfsfileengine_win.o(.text+0xb 3a9):F:/Qt/4.4.3/src/corelib
/io/qfsfileengine_win.cpp:1556: undefined reference to `CoCreateInstance@20'
./tmp\obj\debug_shared\qfsfileengine_win.o(.text+0xb 92b):F:/Qt/4.4.3/src/corelib
/io/qfsfileengine_win.cpp:1556: undefined reference to `IID_IPersistFile'
./tmp\obj\debug_shared\qfsfileengine_win.o(.text+0xb b0b):F:/Qt/4.4.3/src/corelib
/io/qfsfileengine_win.cpp:1556: undefined reference to `CoUninitialize@0'
./tmp\obj\debug_shared\qfsfileengine_win.o(.text+0xb bb7):F:/Qt/4.4.3/src/corelib
/io/qfsfileengine_win.cpp:1556: undefined reference to `CoCreateInstance@20'
./tmp\obj\debug_shared\qfsfileengine_win.o(.text+0xb bd6):F:/Qt/4.4.3/src/corelib
/io/qfsfileengine_win.cpp:1556: undefined reference to `CoInitialize@4'
./tmp\obj\debug_shared\qfsfileengine_win.o(.text+0xb c04):F:/Qt/4.4.3/src/corelib
/io/qfsfileengine_win.cpp:1556: undefined reference to `CoCreateInstance@20'
./tmp\obj\debug_shared\qfsfileengine_win.o(.text+0xb e92):F:/Qt/4.4.3/src/corelib
/io/qfsfileengine_win.cpp:1556: undefined reference to `IID_IPersistFile'
./tmp\obj\debug_shared\qfsfileengine_win.o(.text+0xb f3a):F:/Qt/4.4.3/src/corelib
/io/qfsfileengine_win.cpp:1556: undefined reference to `CoUninitialize@0'
./tmp\obj\debug_shared\qfsfileengine_win.o(.text+0xc 00d):F:/Qt/4.4.3/src/corelib
/io/qfsfileengine_win.cpp:1556: undefined reference to `CoCreateInstance@20'
./tmp\obj\debug_shared\qfsfileengine_win.o(.text+0xc 02c):F:/Qt/4.4.3/src/corelib
/io/qfsfileengine_win.cpp:1556: undefined reference to `CoInitialize@4'
./tmp\obj\debug_shared\qfsfileengine_win.o(.text+0xc 05a):F:/Qt/4.4.3/src/corelib
/io/qfsfileengine_win.cpp:1556: undefined reference to `CoCreateInstance@20'
./tmp\obj\debug_shared\qfsfileengine_win.o(.text+0xc 5dc):F:/Qt/4.4.3/src/corelib
/io/qfsfileengine_win.cpp:1556: undefined reference to `IID_IPersistFile'
./tmp\obj\debug_shared\qfsfileengine_win.o(.text+0xc 960):F:/Qt/4.4.3/src/corelib
/io/qfsfileengine_win.cpp:1556: undefined reference to `CoUninitialize@0'
./tmp\obj\debug_shared\quuid.o(.text+0x22e3): In function `ZN5QUuid10createUuidE
v':
F:/Qt/4.4.3/src/corelib/plugin/quuid.cpp:566: undefined reference to `CoCreateGu
id@4'
./tmp\obj\debug_shared\qeventdispatcher_win.o(.text+ 0x2ac5): In function `ZN28QE
ventDispatcherWin32Private16doWsaAsyncSelectEi':
F:/Qt/4.4.3/src/corelib/kernel/qeventdispatcher_win.cpp:619: undefined reference
to `WSAAsyncSelect@16'
collect2: ld returned 1 exit status
mingw32-make[2]: *** [..\..\lib\QtCored4.dll] Error 1
mingw32-make[2]: Leaving directory `F:/Qt/4.4.3/src/corelib'
mingw32-make[1]: *** [debug-all] Error 2
mingw32-make[1]: Leaving directory `F:/Qt/4.4.3/src/corelib'
mingw32-make: *** [sub-corelib-make_default-ordered] Error 2

---

Quote:

---

Originally Posted by jjbabu

Am i right spirit?

---

I said, it depends of you system. on my system build process takes 1h 15m.

Quote:

---

Originally Posted by jjbabu

Do you know what is the problem spirit.

---

I don't know, that's why I suggest you to build Qt manually.

Quote:

---

Originally Posted by jjbabu

I think the problem is related to OS or system related, Am i right or not?

---

I'm not sure.
again if after rebuilding Qt you will have the same problem, then maybe something wrong with you system, but doubt that it connects with system.

btw, I never use intallation of Qt, I always build it by myself.