If GCC5.5:
Linking CXX executable boolbd
 lto-wrapper: fatal error: /usr/bin/c++ returned 1 exit status
compilation terminated.

Updated the system and prompted a new question.
ubuntu 14.04-64   boost1.68   GCC5.5

Linking CXX executable connectivity_tool
lto1: error: bad value (knl) for -march= switch
lto-wrapper: /usr/bin/c++ returned 1 exit status
/usr/bin/ld: lto-wrapper failed
collect2: error: ld returned 1 exit status
make[3]: *** [src/connectivity_tool] Error 1
make[3]: Leaving directory `/root/boolberry/build/release'
make[2]: *** [src/CMakeFiles/connectivity_tool.dir/all] Error 2
make[2]: Leaving directory `/root/boolberry/build/release'
make[1]: *** [all] Error 2
make[1]: Leaving directory `/root/boolberry/build/release'
make: *** [build-release] Error 2