configure.ac => CXXFLAGS="$CXXFLAGS -std=c++14"
set CXXFLAGS => std=c++14
well done~?
too young too sample
./autogen.sh
./configure
however, you‘d better configure it using the forward place.
like this:
fucking gnu auto tools agin.
enable c++11 in autoconf in fucking gnu auto tools
原文：http://www.cnblogs.com/clor001/p/5775872.html