Merge pull request #26336 from xinpingwang:master

PiperOrigin-RevId: 261392945

tensorflow/lite/tools/make/Makefile

@@ -161,6 +161,9 @@ 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_ALL_SRCS += tensorflow/lite/delegates/nnapi/nnapi_delegate.cc
 	CORE_CC_ALL_SRCS += tensorflow/lite/nnapi/nnapi_implementation.cc

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

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