diff --git a/src/System/BUILD.gn b/src/System/BUILD.gn
index 38256f7..74d21c8 100644
--- a/src/System/BUILD.gn
+++ b/src/System/BUILD.gn
@@ -16,6 +16,7 @@
 
 swiftshader_source_set("System") {
   sources = [
+    "Build.hpp",
     "CPUID.cpp",
     "CPUID.hpp",
     "Configurator.cpp",
diff --git a/src/System/Build.hpp b/src/System/Build.hpp
new file mode 100644
index 0000000..85dc018
--- /dev/null
+++ b/src/System/Build.hpp
@@ -0,0 +1,39 @@
+// Copyright 2019 The SwiftShader Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef Build_hpp
+#define Build_hpp
+
+// Define MEMORY_SANITIZER_ENABLED to 1 if the project was build with the memory
+// sanitizer enabled (-fsanitize=memory).
+#if defined(__SANITIZE_MEMORY__)
+#define MEMORY_SANITIZER_ENABLED 1
+#else // defined(__SANITIZE_MEMORY__)
+#if defined(__clang__)
+#if __has_feature(memory_sanitizer)
+#define MEMORY_SANITIZER_ENABLED 1
+#endif // __has_feature(memory_sanitizer)
+#endif // defined(__clang__)
+#endif // defined(__SANITIZE_MEMORY__)
+
+// MEMORY_SANITIZER_ONLY(X) resolves to X if MEMORY_SANITIZER_ENABLED is defined
+// to a non-zero value, otherwise MEMORY_SANITIZER_ONLY() is stripped by the
+// preprocessor.
+#if MEMORY_SANITIZER_ENABLED
+#define MEMORY_SANITIZER_ONLY(x) x
+#else
+#define MEMORY_SANITIZER_ONLY(x)
+#endif // MEMORY_SANITIZER_ENABLED
+
+#endif // Build_hpp