CMAKE_OPTIONS=""
-CMAKE_OPTIONS=$CMAKE_OPTIONS" -DCMAKE_INSTALL_PREFIX:STRING=${PRODUCT_INSTALL}"
-CMAKE_OPTIONS=$CMAKE_OPTIONS" -DCMAKE_BUILD_TYPE:STRING=Release"
-CMAKE_OPTIONS=$CMAKE_OPTIONS" -DONLY_LIB=ON"
+CMAKE_OPTIONS+=" -DCMAKE_INSTALL_PREFIX:STRING=${PRODUCT_INSTALL}"
+CMAKE_OPTIONS+=" -DCMAKE_BUILD_TYPE:STRING=Release"
+CMAKE_OPTIONS+=" -DONLY_LIB=ON"
echo '$SOURCE_DIR ' $SOURCE_DIR
cmake $CMAKE_OPTIONS $SOURCE_DIR