I do not find anything in the README about qt4 or qwt but they seem
to be required for gr-qtgui.
I used portinstall to install py27-qt4 and several hours and 57
later, cmake could find qt4.
Then I installed py27-pyqwt and it also installed qwt-5.2.2. Cmake
still would not find qwt. (QWT_FOUND = FALSE).
I finally tried adding the QWT_INCLUDE_DIRS line below and cmake now
finds qwt and shows gr-qtgui to be built. Trying that next.
cmake \ -DCMAKE_INSTALL_PREFIX=$GR_PREFIX \ -DQWT_INCLUDE_DIRS=/usr/local/include/qwt \ ../
gr-user . ovillatx.sytes.net