llvm-config failed executing

when I tried to install the llvmlite via setup.py, it showed

running install
running build
got version from VCS {'version': '0.4.0', 'full': '8a681a2726ae79b640b4147b13cdd5e309a5c74f'}
running build_ext
/usr/local/opt/python/bin/python2.7 ffi/build.py
LLVM version... Traceback (most recent call last):
  File "ffi/build.py", line 112, in <module>
    main()
  File "ffi/build.py", line 106, in main
    main_posix('osx', '.dylib')
  File "ffi/build.py", line 93, in main_posix
    "to the path for llvm-config" % (llvm_config,))
RuntimeError: llvm-config failed executing, please point LLVM_CONFIG to the path for llvm-config
error: command '/usr/local/opt/python/bin/python2.7' failed with exit status 1

And I saw from the readme file that If your LLVM is installed in a non-standard location, first point the LLVM_CONFIG environment variable to the path of the corresponding llvm-config executable. So how can I find the location of LLVM on my computer? If I find its llvm-config executable, then I should define “LLVM_CONFIG” as the path to the exe, am I right? I’m using OS X Yosemite. Thank you.

[root-11]

…And for Debian/Ubuntu users who run into this problem just install LLVM as:

sudo apt-get install llvm

[eusoubrasileiro]

you should have llvm installed that’s why