Mac: Undefined symbols for architecture x86_64: "QApplication::palette()", referenced from:

Question

i am getting the following linker error when compiling our Qt project. We do not use qmake. We use autoconf & automake.. Now porting to Mac brings the follwoing error: I have tried using Qt-SDK and by compiling Qt by myself... Neither worked :(

Maybe somebody has an idea?

    /bin/sh ../../libtool --tag=CXX   --mode=link clang++  -g -O2  -Wl,-rpath - 

    Wl,/space/dev-libs/instantclient_10_2  -Wl,-rpath -Wl,/space/dev-libs/boost_1_53/lib -v  -o showtime showtime-application_resources.o showtime-main.o cmdline.o ../../atcaf/atcafgui/libatcafgui.la 
libtool: link: clang++ -g -O2 -Wl,-rpath -Wl,/space/dev-libs/instantclient_10_2 -Wl,-rpath -Wl,/space/dev-libs/boost_1_53/lib -v -o showtime showtime-application_resources.o showtime-main.o cmdline.o -Wl,-bind_at_load  ../../atcaf/atcafgui/.libs/libatcafgui.a -L/usr/local/Qt-5.0.1/lib /usr/local/Qt-5.0.1/lib/libQt5Widgets.dylib /usr/local/Qt-5.0.1/lib/libQt5Gui.dylib /usr/local/Qt-5.0.1/lib/libQt5Sql.dylib /usr/local/Qt-5.0.1/lib/libQt5Xml.dylib /usr/local/Qt-5.0.1/lib/libQt5XmlPatterns.dylib /usr/local/Qt-5.0.1/lib/libQt5Network.dylib /usr/local/Qt-5.0.1/lib/libQt5Core.dylib -L/space/dev-libs/log4cxx-dfs/lib /space/dev-libs/log4cxx-dfs/lib/liblog4cxx.dylib -L/usr/lib -laprutil-1 -lexpat -liconv -lpq -lsqlite3 -lldap -llber -lapr-1 -lpthread -L/space/dev-libs/boost_1_53/lib -lboost_python -lpython2.6 -L/space/dev-libs/instantclient_10_2 -lclntsh -lz
Apple clang version 3.1 (tags/Apple/clang-318.0.58) (based on LLVM 3.1svn)
Target: x86_64-apple-darwin11.4.2
Thread model: posix
 "/usr/bin/ld" -demangle -dynamic -arch x86_64 -macosx_version_min 10.7.4 -o showtime -lcrt1.10.6.o -L/usr/local/Qt-5.0.1/lib -L/space/dev-libs/log4cxx-dfs/lib -L/usr/lib -L/space/dev-libs/boost_1_53/lib -L/space/dev-libs/instantclient_10_2 -rpath /space/dev-libs/instantclient_10_2 -rpath /space/dev-libs/boost_1_53/lib showtime-application_resources.o showtime-main.o cmdline.o -bind_at_load ../../atcaf/atcafgui/.libs/libatcafgui.a /usr/local/Qt-5.0.1/lib/libQt5Widgets.dylib /usr/local/Qt-5.0.1/lib/libQt5Gui.dylib /usr/local/Qt-5.0.1/lib/libQt5Sql.dylib /usr/local/Qt-5.0.1/lib/libQt5Xml.dylib /usr/local/Qt-5.0.1/lib/libQt5XmlPatterns.dylib /usr/local/Qt-5.0.1/lib/libQt5Network.dylib /usr/local/Qt-5.0.1/lib/libQt5Core.dylib /space/dev-libs/log4cxx-dfs/lib/liblog4cxx.dylib -laprutil-1 -lexpat -liconv -lpq -lsqlite3 -lldap -llber -lapr-1 -lpthread -lboost_python -lpython2.6 -lclntsh -lz -lstdc++ -lSystem /usr/bin/../lib/clang/3.1/lib/darwin/libclang_rt.osx.a

Undefined symbols for architecture x86_64:

  "QApplication::palette()", referenced from:
      _main in showtime-main.o
  "QApplication::commitData(QSessionManager&)", referenced from:
      vtable for Application in libatcafgui.a(libatcafgui_la-Application.o)
  "QApplication::saveState(QSessionManager&)", referenced from:
      vtable for Application in libatcafgui.a(libatcafgui_la-Application.o)
  "QAbstractItemView::dataChanged(QModelIndex const&, QModelIndex const&)", referenced from:
      vtable for LogTableWWU in libatcafgui.a(libatcafgui_la-moc_LogTableWWU.o)
  "QWidget::styleChange(QStyle&)", referenced from:

Answer 1

I had a similar problem when porting from Qt 4 to Qt 5. There were missing functions for QApplication::commitData() and QApplication::saveState().

I had derived a class from QApplication, in the header file I changed

#include <QtGui/QApplication>

to

#include <QApplication>

and this solved the problem.