seems not to have been applied to source checked out 2016.12.27 around 20:30 Eastern US time via
git clone --recursive https://bitbucket.org/cafu/cafu.git Cafu A manual patch to my local copy, adding std:: before the calls to abs() on lines 5846 & 5848 in Cafu/ExtLibs/wxWidgets/src/stc/scintilla/src/Editor.cxx fixed the problem.
My system is Linux Kubuntu
#34-Ubuntu SMP Tue Dec 13 14:30:43 UTC 2016 x86_64
g++ --version g++ (Ubuntu 6.2.0-5ubuntu12) 6.2.0 20161005
Thanks for your dilligent work on Cafu! /Bob McGhee