Qt4.8 + CMake 2.8.5 on OSX 10.5.8 can't link

Question

I'm using Qt4.8 on OSX Leopard and instead of qmake+QtCreator I want to compile a very simple project using CMake on OSX to understand how to do a package.

While the very same project compiles and links smoothly under Linux, under my OSX box, this is the error message I always get in the linking phase:

ld warning: in /Library/Frameworks//QtGui.framework/QtGui, file is not of required architecture
ld warning: in /Library/Frameworks//QtCore.framework/QtCore, file is not of required architecture
Undefined symbols:
  "QWidget::mousePressEvent(QMouseEvent*)", referenced from:
      vtable for TestFormin moc_TestForm.cxx.o
  "QObject::childEvent(QChildEvent*)", referenced from:
      vtable for TestFormin moc_TestForm.cxx.o
  "QWidget::actionEvent(QActionEvent*)", referenced from:
      vtable for TestFormin moc_TestForm.cxx.o
  "QCoreApplication::translate(char const*, char const*, char const*, QCoreApplication::Encoding)", referenced from:

etcetera etcetera.

This happens for every project I want to compile with cmake. Any idea of what's going on?

Answer 1

Check what architecture (i386,x86_64) is being used by cmake (CMAKE_OSX_ARCHITECTURES). Try suggesting the architecture to cmake:

cmake -DCMAKE_OSX_ARCHITECTURES=x86_64