added smartz to build.sh

build.sh

@@ -4,4 +4,16 @@
 # file COPYING or https://www.gnu.org/licenses/gpl-3.0.en.html
 
 set -eu -o pipefail
-./util/build.sh --disable-tests $@
+
+# run correct build script for detected OS
+if [[ "$OSTYPE" == "linux-gnu"* ]]; then
+    ./util/build.sh --disable-tests $@
+elif [[ "$OSTYPE" == "darwin"* ]]; then
+    ./util/build-mac.sh --disable-tests $@
+elif [[ "$OSTYPE" == "msys"* ]]; then
+    ./util/build-win.sh --disable-tests $@
+#elif [[ "$OSTYPE" == "freebsd"* ]]; then
+    # placeholder
+else
+    echo "Unable to detect your OS. What are you using?"
+fi