/usr/local/bin/ruby extconf.rb 
creating Makefile

make "DESTDIR=" clean

make "DESTDIR="
compiling context.c
compiling threads.c
compiling locker.c
compiling breakpoint.c
compiling byebug.c
linking shared-object byebug/byebug.so

make "DESTDIR=" install
/usr/bin/install -c -m 0755 byebug.so ./.gem.20141021-32143-1bqeixv/byebug
installing default byebug libraries