can't install zmq

[henryzp]

error Info:

> zmq@2.15.3 install /Users/zhangpu/Documents/node学习/myNodeStudy/node_modules/zmq
> node-gyp rebuild

gyp WARN download NVM_NODEJS_ORG_MIRROR is deprecated and will be removed in node-gyp v4, please use NODEJS_ORG_MIRROR
gyp WARN download NVM_NODEJS_ORG_MIRROR is deprecated and will be removed in node-gyp v4, please use NODEJS_ORG_MIRROR
/bin/sh: pkg-config: command not found
gyp: Call to 'pkg-config libzmq --libs' returned exit status 127 while in binding.gyp. while trying to load binding.gyp
gyp ERR! configure error
gyp ERR! stack Error: `gyp` failed with exit code: 1
gyp ERR! stack     at ChildProcess.onCpExit (/usr/local/lib/node_modules/npm/node_modules/node-gyp/lib/configure.js:305:16)
gyp ERR! stack     at emitTwo (events.js:106:13)
gyp ERR! stack     at ChildProcess.emit (events.js:191:7)
gyp ERR! stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:215:12)
gyp ERR! System Darwin 14.5.0
gyp ERR! command "/usr/local/bin/node" "/usr/local/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js" "rebuild"
gyp ERR! cwd /Users/zhangpu/Documents/node学习/myNodeStudy/node_modules/zmq
gyp ERR! node -v v6.9.4
gyp ERR! node-gyp -v v3.4.0
gyp ERR! not ok
npm WARN myNodeStudy@1.0.0 No description
npm WARN myNodeStudy@1.0.0 No repository field.
npm ERR! Darwin 14.5.0
npm ERR! argv "/usr/local/bin/node" "/usr/local/bin/npm" "i" "zmq"
npm ERR! node v6.9.4
npm ERR! npm  v3.10.10
npm ERR! code ELIFECYCLE

npm ERR! zmq@2.15.3 install: `node-gyp rebuild`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the zmq@2.15.3 install script 'node-gyp rebuild'.
npm ERR! Make sure you have the latest version of node.js and npm installed.
npm ERR! If you do, this is most likely a problem with the zmq package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR!     node-gyp rebuild
npm ERR! You can get information on how to open an issue for this project with:
npm ERR!     npm bugs zmq
npm ERR! Or if that isn't available, you can get their info via:
npm ERR!     npm owner ls zmq
npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request:
npm ERR!     /Users/zhangpu/Documents/node学习/myNodeStudy/npm-debug.log

I have install zeromq by brew

/usr/local/Cellar/zeromq/4.2.1

my node version 6.9.4
npm version 3.10.10

[henryzp]

install pkgConfig can fix problem。

brew install pkgConfig