Launcher not launching on Linux Mint 17.3

With GCC 4.9, GCC 65, and GCC 6 from https://launchpad.net/~ubuntu-toolchain-r/+archive/ubuntu/test?field.series_filter=trusty (was getting 'CXXABI_1.3.8' not found & 'CXXABI_1.3.9' not found, GCC 4.9 and newer fixes this), getting

./launcher: relocation error: ./launcher: symbol _ZTINSt8ios_base7failureB5cxx11E, version GLIBCXX_3.4.21 not defined in file libstdc++.so.6 with link time reference

 It seems like, even though GCC 4.9 and newer are available for Ubuntu 14.04, there was still some ABI differences that still come into play, which would make this work on 16.04 and newer, but not 14.04 and older, if that makes any sense?