Issues compiling on Linux

I've been trying to compile RPCS3 from git, to no avail. I'm on Linux, specifically Elementary OS. I've been trying various things for a few hours now, but I can't get past this error. Any suggestions?

justin@ElementaryPC:~/rpcs3$ cd rpcs3 && cmake CMakeLists.txt && make && cd ../
-- cotire 1.7.3 loaded.
-- The C compiler identification is GNU 4.8.4
-- The CXX compiler identification is GNU 4.8.4
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Initializing RPCS3_SRC_DIR=/home/justin/rpcs3/rpcs3
-- Found wxWidgets: TRUE
-- Found ZLIB: /usr/lib/x86_64-linux-gnu/libz.so (found version "1.2.8&quot
-- Found OpenGL: /usr/lib/x86_64-linux-gnu/libGL.so
-- Found OpenAL: /usr/lib/x86_64-linux-gnu/libopenal.so
-- dir='/usr/lib/x86_64-linux-gnu/wx/include/gtk2-unicode-3.0'
-- dir='/usr/include/wx-3.0'
-- dir='/usr/lib/x86_64-linux-gnu/wx/include/gtk2-unicode-3.0'
-- dir='/usr/include/wx-3.0'
-- dir='/usr/include/AL'
-- dir='/usr/lib/llvm-3.6/include'
-- dir='/home/justin/rpcs3/rpcs3/../ffmpeg/linux/x86_64/include'
-- dir='/home/justin/rpcs3/rpcs3'
-- dir='/home/justin/rpcs3/rpcs3/Loader'
-- dir='/home/justin/rpcs3/rpcs3/Crypto'
-- dir='/home/justin/rpcs3/rpcs3/..'
-- dir='/home/justin/rpcs3/rpcs3/../asmjit/src/asmjit'
-- dir='/home/justin/rpcs3/rpcs3/../glm'
-- CXX target rpcs3 cotired excluding /home/justin/rpcs3/rpcs3/Emu/Cell/PPULLVMRecompiler.cpp.
-- Configuring done
-- Generating done
-- Build files have been written to: /home/justin/rpcs3/rpcs3
Scanning dependencies of target GitVersion
[ 0%] Generating something_that_never_exists
-- Found Git: /usr/bin/git (found version "1.9.1&quot
-- GIT_VERSION: 3864-68608ef
[ 0%] Built target GitVersion
[ 0%] Generating CXX prefix source cotire/rpcs3_CXX_prefix.cxx
[ 1%] Generating CXX prefix header cotire/rpcs3_CXX_prefix.hxx
[ 1%] Building CXX precompiled header cotire/rpcs3_CXX_prefix.hxx.gch
c++: error: unrecognized command line option ‘-std=c++14’
CMake Error at cmake_modules/cotire.cmake:1703 (message):
cotire: error 1 precompiling
/home/justin/rpcs3/rpcs3/cotire/rpcs3_CXX_prefix.hxx.
Call Stack (most recent call first):
cmake_modules/cotire.cmake:3233 (cotire_precompile_prefix_header)


make[2]: *** [cotire/rpcs3_CXX_prefix.hxx.gch] Error 1
make[1]: *** [CMakeFiles/rpcs3.dir/all] Error 2
make: *** [all] Error 2
justin@ElementaryPC:~/rpcs3/rpcs3$