I successfully built and installed the kdev-control-flow-graph plugin after it drew sandsmark / kdev-control-flow-graph in my own fljx / kdev-control-flow-graph with minimal changes.
When I try to enable kdev-control-flow-graph, I get the following error:

"Unable to instantiate KGraphViewer, make sure compatible version is installed.
I work on Kubuntu 16.04 with KDevelop 5.1.1 and install kgraphviewer:
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kgraphviewer/xenial,now 4:2.1.90-0ubuntu2 amd64 [installed]
GraphViz dot graph viewer
kgraphviewer-dbg/xenial 4:2.1.90-0ubuntu2 amd64
GraphViz dot graph viewer for KDE 4 debug files
kgraphviewer-dev/xenial,now 4:2.1.90-0ubuntu2 amd64 [installed]
GraphViz dot graph viewer - devel files
libkgraphviewer2/xenial,now 4:2.1.90-0ubuntu2 amd64 [installed]
GraphViz dot graph viewer - libs
Then I build KGraphViewerfrom github, and my system now has:
10571222 0 lrwxrwxrwx 1 root root 22 Ago 14 2015 /usr/lib/libkgraphviewer.so.2 -> libkgraphviewer.so.2.1
10571221 712 -rw-r--r-- 1 root root 728288 Ago 14 2015 /usr/lib/libkgraphviewer.so.2.1
10558158 2868 -rw-r--r-- 1 root root 2935024 Ago 17 16:32 /usr/lib/x86_64-linux-gnu/libkgraphviewer.so.3
11170876 0 lrwxrwxrwx 1 root root 57 Ago 17 16:37 /usr/lib/x86_64-linux-gnu/qt5/plugins/kdevplatform/27/kgraphviewerpart.so -> /usr/lib/x86_64-linux-gnu/qt5/plugins/kgraphviewerpart.so
10748549 180 -rw-r--r-- 1 root root 181312 Ago 17 16:32 /usr/lib/x86_64-linux-gnu/qt5/plugins/kgraphviewerpart.so
10558159 0 lrwxrwxrwx 1 root root 20 Ago 17 16:33 /usr/lib/x86_64-linux-gnu/libkgraphviewer.so -> libkgraphviewer.so.3
10571223 60 -rw-r--r-- 1 root root 60392 Ago 14 2015 /usr/lib/kde4/kgraphviewerpart.so
10571224 0 lrwxrwxrwx 1 root root 20 Ago 14 2015 /usr/lib/libkgraphviewer.so -> libkgraphviewer.so.2
Can someone please give me any tips on how to properly configure my plugin KGraphViewer KPart?
Thanks in advance.