Collect2: ld returned 1 exit status
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Every times when I try to run something it says that. In Compile Output read @Running build steps for project Testi...
Configuration unchanged, skipping qmake step.
Starting: "C:/QtSDK/mingw/bin/mingw32-make.exe" -w
mingw32-make: Entering directory `C:/Users/Miika/QT sovellukset/Testi-build-desktop'C:/QtSDK/mingw/bin/mingw32-make -f Makefile.Debug
mingw32-make[1]: Entering directory `C:/Users/Miika/QT sovellukset/Testi-build-desktop'
g++ -enable-stdcall-fixup -Wl,-enable-auto-import -Wl,-enable-runtime-pseudo-reloc -mthreads -Wl -Wl,-subsystem,windows -o debug\Testi.exe debug/main.o debug/testi.o debug/moc_testi.o -L"c:\QtSDK\Simulator\Qt\mingw\lib" -lmingw32 -lqtmaind -lQtGuid4 -lQtCored4 -LC:\OpenSSL-Win32_full\lib
debug/moc_testi.o:C:\Users\Miika\QT sovellukset\Testi-build-desktop/debug/moc_testi.cpp:74: undefined reference to `Testi::on_pushButton_2_clicked()'
debug/moc_testi.o:moc_testi.cpp:(.rdata$_ZTV5Testi[vtable for Testi]+0x4c): undefined reference to `QWidget::getDC() const'
debug/moc_testi.o:moc_testi.cpp:(.rdata$ZTV5Testi[vtable for Testi]+0x50): undefined reference to `QWidget::releaseDC(HDC_*) const'
debug/moc_testi.o:moc_testi.cpp:(.rdata$_ZTV5Testi[vtable for Testi]+0xb8): undefined reference to `QWidget::winEvent(tagMSG*, long*)'
debug/moc_testi.o:moc_testi.cpp:(.rdata$_ZTV5Testi[vtable for Testi]+0x104): undefined reference to `non-virtual thunk to QWidget::getDC() const'
debug/moc_testi.o:moc_testi.cpp:(.rdata$ZTV5Testi[vtable for Testi]+0x108): undefined reference to `non-virtual thunk to QWidget::releaseDC(HDC_*) const'
collect2: ld returned 1 exit status
mingw32-make[1]: Leaving directory `C:/Users/Miika/QT sovellukset/Testi-build-desktop'
mingw32-make[1]: *** [debug\Testi.exe] Error 1
mingw32-make: Leaving directory `C:/Users/Miika/QT sovellukset/Testi-build-desktop'
mingw32-make: *** [debug] Error 2
The process "C:/QtSDK/mingw/bin/mingw32-make.exe" exited with code %2.
Error while building project Testi (target: Desktop)
When executing build step 'Make'@
I think the problem is in Qt or somewhere because it comes in every project.
What I must do, and what's wrong?
Thanx and sorry my bad English, I'm Finnish beginner.