QT-related build error on Mac OS X 10.10

[mikepurvis]

Something to do with Python bindings:

[qt_gui_cpp] ==> '/Users/test/indigo_desktop_full_ws/build/qt_gui_cpp/build_env.sh /usr/bin/make --jobserver-fds=3,4 -j' in '/Users/test/indigo_desktop_full_ws/build/qt_gui_cpp'
[ 76%] Built target qt_gui_cpp
[ 84%] Compiling generated code for qt_gui_cpp_sip Python bindings...
In file included from siplibqt_gui_cpp_sipQList0101qt_gui_cppPluginProvider.cpp:7:
./sipAPIlibqt_gui_cpp_sip.h:13:10: fatal error: 'QMetaType' file not found
#include <QMetaType>
         ^
In file included from siplibqt_gui_cpp_sipcmodule.cpp:7:
./sipAPIlibqt_gui_cpp_sip.h:13:10: fatal error: 'QMetaType' file not found
#include <QMetaType>
         ^
1 error generated.
make[3]: *** [siplibqt_gui_cpp_sipQList0101qt_gui_cppPluginProvider.o] Error 1
make[3]: *** Waiting for unfinished jobs....
1 error generated.
make[3]: *** [siplibqt_gui_cpp_sipcmodule.o] Error 1
make[2]: *** [/Users/test/indigo_desktop_full_ws/devel/lib/python2.7/site-packages/qt_gui_cpp/libqt_gui_cpp_sip.dylib] Error 2
make[1]: *** [src/qt_gui_cpp_sip/CMakeFiles/libqt_gui_cpp_sip.dir/all] Error 2
make: *** [all] Error 2
[qt_gui_cpp] <== '/Users/test/indigo_desktop_full_ws/build/qt_gui_cpp/build_env.sh /usr/bin/make --jobserver-fds=3,4 -j' failed with return code '2'

Failed   <== qt_gui_cpp                       [ 1.6 seconds ] 

[mikepurvis]

Related question: http://answers.ros.org/question/211546/fatal-error-qmetatype-file-not-found-when-building-ros-indigo-on-os-x-10103/

The following workaround, though horrible, does seem to make it build happily:

pushd /usr/local/Cellar/qt
ln -s 4.8.7 4.8.6
popd

[dirk-thomas]

It looks like there is nothing we can do about in the ROS package?

[mikepurvis]

If this is a problem with QT's cmake find module, then yeah, nothing can be done I suppose. But this is the first affected package in a desktop_full build. :(

[dirk-thomas]

You could output all the CMake variables Qt's CMake module returns and check if they are consistent. Without having OS X to test this I would guess it might be more likely a bug where the files are being installed.
Are all other files (except QMetaType.h) available in both version folders? Is CMake reporting the wrong Qt version was found?

[spmaniato]

Hello @mikepurvis, I'm installing ROS on OS X using your install script and instead of /usr/local/Cellar/qt/4.8.7 I have /usr/local/Cellar/qt/4.8.7_2. I should still do the equivalent of the instructions below, right? Thanks!

  # This awful hack papers over a problem with QT's cmake find modules.
  # See: https://github.com/ros-visualization/qt_gui_core/issues/57#issuecomment-122348727
  if [ -d /usr/local/Cellar/qt/4.8.7 ]; then
    pushd /usr/local/Cellar/qt
    if [ ! -d "4.8.6" ]; then
      ln -s 4.8.7 4.8.6
    fi
    popd
  fi

[dirk-thomas]

Is this problem still relevant or can this be closed?

[spmaniato]

Is this problem still relevant or can this be closed?

Looking at the latest version of the OS X installation script, I believe it can be closed 👍 @mikepurvis can confirm.