llvm installation

hello sir,
i am using llvm compiler for my project.i an doing llvm installation.i followed all the steps in the llvm website but after running this command

…/llvm/configure --enable-targets=host-only it executed but it didnt create any make file in build directory ,only config.log file is appeared after running this command.

after running the later command it is showing like this
manoj@ubuntu:~/Desktop/LLVM/build$ make -j 4
make: *** No targets specified and no makefile found. Stop

please help me to finish installation. i am running installation ubuntu os.