Reproduces for me with boost-1.70.0.
./configure --enable-boost
In file included from src/vimpc.hpp:28,
from src/buffers.cpp:22:
src/clientstate.hpp:125:12: error: ‘thread’ in namespace ‘std’ does not name a type
std::thread updateThread_;
^~~~~~
src/clientstate.hpp:125:7: note: ‘std::thread’ is defined in header ‘<thread>’; did you forget to ‘#include <thread>’?
Reproduces for me with boost-1.70.0.
./configure --enable-boost
See also: https://bugs.gentoo.org/690714