diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100644
index 0000000..2a1130f
--- /dev/null
+++ b/CMakeLists.txt
@@ -0,0 +1,19 @@
+# TODO: remove for release.
+if(NOT CMAKE_BUILD_TYPE)
+  set(CMAKE_BUILD_TYPE Debug CACHE STRING "build type")
+endif()
+
+# Require 3.3 and set policy CMP0057 for IN_LIST operator support
+cmake_minimum_required(VERSION 3.3)
+cmake_policy(SET CMP0057 NEW)
+project(onnf)
+
+set(CMAKE_CXX_FLAGS_DEBUG "-g")
+set(CMAKE_CXX_FLAGS_RELEASE "-O2 -DNDEBUG")
+set(ONNF_ROOT "${CMAKE_CURRENT_SOURCE_DIR}")
+
+# Set cxx standard only for onnf project files.
+set(CMAKE_CXX_STANDARD 14)
+
+add_subdirectory(src/builder)
+
diff --git a/src/builder/CMakeLists.txt b/src/builder/CMakeLists.txt
index eb4a7b4..4e3ec6c 100644
--- a/src/builder/CMakeLists.txt
+++ b/src/builder/CMakeLists.txt
@@ -1,5 +1,3 @@
-add_definitions(-DBOOST_LOG_DYN_LINK)
-
 add_library(builder
         sgir.cpp
         )
diff --git a/src/builder/onnx_importer.cpp b/src/builder/onnx_importer.cpp
index 3d2205d..4235856 100644
--- a/src/builder/onnx_importer.cpp
+++ b/src/builder/onnx_importer.cpp
@@ -1,3 +1,11 @@
+//===----------------------------------------------------------------------===//
+//
+// Copyright 2019 The IBM Research Authors.
+//
+// =============================================================================
+//
+//===----------------------------------------------------------------------===//
+
 #include "sgir.hpp"
 
 //empty module for MLIR is generated to test the compile/link of MLIR code
diff --git a/src/builder/sgir.cpp b/src/builder/sgir.cpp
index 50b31a0..2fce457 100644
--- a/src/builder/sgir.cpp
+++ b/src/builder/sgir.cpp
@@ -57,7 +57,7 @@ namespace onnf {
 
 int SGIRTest() {
   mlir::MLIRContext context;
-  
+
   mlir::OwningModuleRef module = SGIRGenImpl(context).mlirGen();
   if (!module)
     return 1;