build failure with current version

[Stephen Hemminger]

Started in a fresh checkout on Debian 8 (Jessie) with all listed
required packages installed.

Scanning dependencies of target subsurface
[ 98%] [ 98%] [100%] [100%] Building CXX object CMakeFiles/subsurface.dir/subsurface-desktop-main.cpp.o
Building CXX object CMakeFiles/subsurface.dir/subsurface-desktop-helper.cpp.o
Building CXX object CMakeFiles/subsurface.dir/qrc_subsurface.cpp.o
Building CXX object CMakeFiles/subsurface.dir/subsurface_automoc.cpp.o
Linking CXX executable subsurface
desktop-widgets/libsubsurface_interface.a(mainwindow.cpp.o): In function `MainWindow::readSettings()':
/home/shemminger/build/subsurface/desktop-widgets/mainwindow.cpp:1238: undefined reference to `init_proxy()'
collect2: error: ld returned 1 exit status
CMakeFiles/subsurface.dir/build.make:264: recipe for target 'subsurface' failed
make[2]: *** [subsurface] Error 1
CMakeFiles/Makefile2:271: recipe for target 'CMakeFiles/subsurface.dir/all' failed
make[1]: *** [CMakeFiles/subsurface.dir/all] Error 2
Makefile:117: recipe for target 'all' failed
make: *** [all] Error 2


PS: Build appears to be completely single threaded.
Is there anyway to do a parallel build?