Unable to build on Mac OS X El Capitan

[guoway]

Environment:
OS : Mac OS X El Capitan
Node.js version : v6.3.0
pcsclite version : 0.4.9

Situation :
Following is the output when I was installing pcsclite.
kens-MacBook-Pro:node-pcsclite-master Ken$ npm install
npm WARN package.json pcsclite@0.4.9 license should be a valid SPDX license expression
> pcsclite@0.4.9 install /Users/ken/Documents/workspace/workspace_nodejs/node-pcsclite-master
> node-gyp rebuild

CXX(target) Release/obj.target/pcsclite/src/addon.o
CXX(target) Release/obj.target/pcsclite/src/pcsclite.o
../src/pcsclite.cpp:286:20: warning: comparison of integers of different signs: 'LONG' (aka 'int') and 'unsigned int' [-Wsign-compare]
if (result == SCARD_E_INSUFFICIENT_BUFFER) {
~~~~~~ ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 warning generated.
CXX(target) Release/obj.target/pcsclite/src/cardreader.o
SOLINK_MODULE(target) Release/pcsclite.node

Can you help to solve it ?
Thank you ~

[santigimeno]

@guoway are you sure it's failing, from the logs it seems like a warning and not an error. (of course the warning should be fixed)

[guoway]

Sorry about that, I'm new to node.js, so cannot figure it clearly, now I know that's just a warning but error, sorry to bother you ~

[santigimeno]

No problem. Thanks for the report though, I'll try to fix it asap