From b4a142283d670c89b8971d8fd7181a6f462fdd4e Mon Sep 17 00:00:00 2001
From: XinPing Wang <xinping.wang@hotmail.com>
Date: Tue, 5 Mar 2019 07:48:50 +0800
Subject: [PATCH 1/2] Disable NNAPI api for Raspberry Pi

---
 tensorflow/lite/tools/make/Makefile | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tensorflow/lite/tools/make/Makefile b/tensorflow/lite/tools/make/Makefile
index 8428e0d2e6b..2c7bc5757df 100644
--- a/tensorflow/lite/tools/make/Makefile
+++ b/tensorflow/lite/tools/make/Makefile
@@ -131,6 +131,9 @@ endif
 ifeq ($(TARGET),ios)
 	BUILD_WITH_NNAPI=false
 endif
+ifeq ($(TARGET),rpi)
+	BUILD_WITH_NNAPI=false
+endif
 ifeq ($(BUILD_WITH_NNAPI),true)
 	CORE_CC_EXCLUDE_SRCS += tensorflow/lite/nnapi_delegate_disabled.cc
 else

From 5702bb9fd7b6696cf55e7301f9ef9d6b6926c998 Mon Sep 17 00:00:00 2001
From: XinPing Wang <xinping.wang@hotmail.com>
Date: Wed, 6 Mar 2019 12:59:26 +0800
Subject: [PATCH 2/2] New build target for aarch64 without NNAPI

---
 tensorflow/lite/tools/make/Makefile           |  3 ++
 .../tools/make/build_generic_aarch64_lib.sh   | 22 +++++++++++++
 .../make/targets/generic_aarch64_makefile.inc | 33 +++++++++++++++++++
 3 files changed, 58 insertions(+)
 create mode 100755 tensorflow/lite/tools/make/build_generic_aarch64_lib.sh
 create mode 100644 tensorflow/lite/tools/make/targets/generic_aarch64_makefile.inc

diff --git a/tensorflow/lite/tools/make/Makefile b/tensorflow/lite/tools/make/Makefile
index 2c7bc5757df..78208a76103 100644
--- a/tensorflow/lite/tools/make/Makefile
+++ b/tensorflow/lite/tools/make/Makefile
@@ -134,6 +134,9 @@ endif
 ifeq ($(TARGET),rpi)
 	BUILD_WITH_NNAPI=false
 endif
+ifeq ($(TARGET),generic-aarch64)
+	BUILD_WITH_NNAPI=false
+endif
 ifeq ($(BUILD_WITH_NNAPI),true)
 	CORE_CC_EXCLUDE_SRCS += tensorflow/lite/nnapi_delegate_disabled.cc
 else
diff --git a/tensorflow/lite/tools/make/build_generic_aarch64_lib.sh b/tensorflow/lite/tools/make/build_generic_aarch64_lib.sh
new file mode 100755
index 00000000000..d497b94ffc0
--- /dev/null
+++ b/tensorflow/lite/tools/make/build_generic_aarch64_lib.sh
@@ -0,0 +1,22 @@
+#!/bin/bash -x
+# Copyright 2017 The TensorFlow Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# ==============================================================================
+
+set -e
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+cd "$SCRIPT_DIR/../../../.."
+
+CC_PREFIX=aarch64-linux-gnu- make -j 3 -f tensorflow/lite/tools/make/Makefile TARGET=generic-aarch64 TARGET_ARCH=armv8-a
diff --git a/tensorflow/lite/tools/make/targets/generic_aarch64_makefile.inc b/tensorflow/lite/tools/make/targets/generic_aarch64_makefile.inc
new file mode 100644
index 00000000000..f4e4f1f9c4d
--- /dev/null
+++ b/tensorflow/lite/tools/make/targets/generic_aarch64_makefile.inc
@@ -0,0 +1,33 @@
+# Settings for generic aarch64 boards such as Odroid C2 or Pine64.
+ifeq ($(TARGET),generic-aarch64)
+  # The aarch64 architecture covers all 64-bit ARM chips. This arch mandates
+  # NEON, so FPU flags are not needed below.
+  TARGET_ARCH := armv8-a
+  TARGET_TOOLCHAIN_PREFIX := aarch64-linux-gnu-
+
+  CXXFLAGS += \
+    -march=armv8-a \
+    -funsafe-math-optimizations \
+    -ftree-vectorize \
+    -fPIC
+
+  CCFLAGS += \
+    -march=armv8-a \
+    -funsafe-math-optimizations \
+    -ftree-vectorize \
+    -fPIC
+
+  LDFLAGS := \
+    -Wl,--no-export-dynamic \
+    -Wl,--exclude-libs,ALL \
+    -Wl,--gc-sections \
+    -Wl,--as-needed
+
+       
+  LIBS := \
+    -lstdc++ \
+    -lpthread \
+    -lm \
+    -ldl
+
+endif