Cannot compile examples

**jmalicke** · 17th July 2014, 07:26

I've installed qwt to /usr/local/qwt-6.1.0 and I put the source in /usr/src/qwt-6.1.0. When I try to compile the examples with qmake/make I get the following problem:

Qt Code:

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$ cd /usr/src/qwt-6.1.0/examples
$ qmake 
$ make
  ...
  make[1]: Entering directory `/usr/src/qwt-6.1.0/examples/animation'
linking ../bin/animation
/usr/local/qwt-6.1.0/lib/libqwt.so: undefined reference to `QMetaType::unregisterConverterFunction(int, int)'
/usr/local/qwt-6.1.0/lib/libqwt.so: undefined reference to `QMetaType::registerConverterFunction(QtPrivate::AbstractConverterFunction const*, int, int)'
/usr/local/qwt-6.1.0/lib/libqwt.so: undefined reference to `QScrollArea::viewportSizeHint() const'
/usr/local/qwt-6.1.0/lib/libqwt.so: undefined reference to `QMetaType::hasRegisteredConverterFunction(int, int)'
collect2: error: ld returned 1 exit status

$ cd /usr/src/qwt-6.1.0/examples
$ qmake 
$ make
  ...
  make[1]: Entering directory `/usr/src/qwt-6.1.0/examples/animation'
linking ../bin/animation
/usr/local/qwt-6.1.0/lib/libqwt.so: undefined reference to `QMetaType::unregisterConverterFunction(int, int)'
/usr/local/qwt-6.1.0/lib/libqwt.so: undefined reference to `QMetaType::registerConverterFunction(QtPrivate::AbstractConverterFunction const*, int, int)'
/usr/local/qwt-6.1.0/lib/libqwt.so: undefined reference to `QScrollArea::viewportSizeHint() const'
/usr/local/qwt-6.1.0/lib/libqwt.so: undefined reference to `QMetaType::hasRegisteredConverterFunction(int, int)'
collect2: error: ld returned 1 exit status

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This is kind of odd. What am I missing?