-bash-4.2# ./start.sh ./bin/php7/bin/php: /lib64/libstdc++.so.6: version `CXXABI_1.3.8' not found (required by /root/bin/php7/bin/../lib/libleveldb.so.1) ./bin/php7/bin/php: /lib64/libstdc++.so.6: version `GLIBCXX_3.4.21' not found (required by /root/bin/php7/bin/../lib/libleveldb.so.1)
gcc 4.9 has a newer C++ ABI version than your system libstdc++ has you need to tell the loader to use newer version of the library by adding that path to LD_LIBRARY_PATH something like this : export LD_LIBRARY_PATH=/home/user/lib/gcc-4.9.0/lib:/home/user/lib/boost_1_55_0/stage/lib:$LD_LIBRARY_PATH