install gcc on OS machines to resolve dependencies on openmp thatis needed by lightgbm native code.

Author: codemzs

build.sh

@@ -2,6 +2,12 @@
 
 set -e
 
+if [ "$(uname)" == "Darwin" ]; then
+    #Mac OS X platform
+	yes | /usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
+	brew install gcc
+fi
+
 SOURCE="${BASH_SOURCE[0]}"
 while [ -h "$SOURCE" ]; do # resolve $SOURCE until the file is no longer a symlink
   DIR="$( cd -P "$( dirname "$SOURCE" )" && pwd )"