qt-gui problems with GNU 3.8

[Mark Koenig]

I am trying to build gnuradio branch maint-3.8 and I am having trouble getting 
qt-gui to enabled.  I am currently using the new distro CentOS 8, and I cannot 
find any ‘qwt’ packages.  Has anyone got gnuradio to build on CentOS 8 yet?  I 
am very close to having all the modules I desire to be built and enabled.

Any help would be greatly appreciated.

Mark

Here is the cmake error output for qt-gui.

-- Python checking for PyQt5 - found
-- Checking for module 'Qt5Qwt6'
--   Package 'Qt5Qwt6', required by 'virtual:world', not found
-- 
-- Configuring gr-qtgui support...
--   Dependency Boost_FOUND = 1
--   Dependency QT_FOUND = 1
--   Dependency QWT_FOUND = FALSE
--   Dependency ENABLE_VOLK = TRUE
--   Dependency ENABLE_GNURADIO_RUNTIME = ON
--   Dependency ENABLE_GR_FFT = ON
--   Dependency ENABLE_GR_FILTER = ON
--   Dependency PYTHONLIBS_FOUND = TRUE
--   Dependency PYQT5_FOUND = TRUE
--   Disabling gr-qtgui support.
--   Override with -DENABLE_GR_QTGUI=ON/OFF

Here are my final modules enabled ad disabled.

-- # Gnuradio enabled components                         
-- ######################################################
--   * python-support
--   * testing-support
--   * doxygen
--   * gnuradio-runtime
--   * gr-ctrlport
--   * * thrift
--   * gnuradio-companion
--   * gr-blocks
--   * gr-fec
--   * gr-fft
--   * gr-filter
--   * gr-analog
--   * gr-digital
--   * gr-dtv
--   * gr-audio
--   * * oss
--   * gr-channels
--   * gr-trellis
--   * gr-uhd
--   * gr-utils
--   * gr_modtool
--   * gr-vocoder
--   * gr-wavelet
-- 
-- ######################################################
-- # Gnuradio disabled components                        
-- ######################################################
--   * sphinx
--   * gr-qtgui
--   * gr-video-sdl
--   * gr-zeromq
--