$ ./install-ext
./install-ext: 3: cd: can't cd to ext/zookeeper
autoreconf: 'configure.ac' or 'configure.in' is required
./install-ext: 5: ./install-ext: ./configure: not found
make: *** No targets specified and no makefile found. Stop.
./install-ext: 7: cd: can't cd to ../zeromq
./install-ext: 8: ./install-ext: ./autogen.sh: not found
./install-ext: 9: ./install-ext: ./configure: not found
make: *** No targets specified and no makefile found. Stop.
./install-ext: 11: cd: can't cd to ../protobuf
./install-ext: 12: ./install-ext: ./configure: not found
make: *** No targets specified and no makefile found. Stop.
./install-ext: 14: cd: can't cd to ../googletest
./install-ext: 15: ./install-ext: ./configure: not found
make: *** No targets specified and no makefile found. Stop.