当我使用 bazel 构建 libtensorflow_inference.so

Question

系统：ubuntu16.04 bazel:0.4.5 张量流：cpu 版本 r1.0 gcc 版本:(Ubuntu 5.4.0-6ubuntu1~16.04.4) 5.4.0 20160609

bazel build -c opt //tensorflow/contrib/android:libtensorflow_inference.so \

--crosstool_top=//external:android/crosstool \ --host_crosstool_top=@bazel_tools//tools/cpp:toolchain \ --cpu=armeabi-v7a

错误是：

tensorflow/core/kernels/BUILD:3749:1: C++ compilation of rule '//tensorflow/core/kernels:android_tensorflow_kernels' failed: Process exited with status 1 [sandboxed].
tensorflow/core/kernels/split_v_op.cc:212:28: error: non-constant-expression cannot be narrowed from type 'value_type' (aka 'long long') to 'int' in initializer list [-Wc++11-narrowing]
          prefix_dim_size, split_sizes_vec[i], suffix_dim_size};
                           ^~~~~~~~~~~~~~~~~~
tensorflow/core/kernels/split_v_op.cc:172:12: note: in instantiation of member function 'tensorflow::SplitVOpCPU<int, long long>::Compute' requested here
  explicit SplitVOpCPU(OpKernelConstruction* c) : Base(c) {}
           ^
tensorflow/core/kernels/split_v_op.cc:355:19: note: in instantiation of member function 'tensorflow::SplitVOpCPU<int, long long>::SplitVOpCPU' requested here
TF_CALL_ALL_TYPES(REGISTER_SPLIT_LEN);
                  ^
tensorflow/core/kernels/split_v_op.cc:212:28: note: insert an explicit cast to silence this issue
          prefix_dim_size, split_sizes_vec[i], suffix_dim_size};
                           ^~~~~~~~~~~~~~~~~~
                           static_cast<int>( )
tensorflow/core/kernels/split_v_op.cc:212:28: error: non-constant-expression cannot be narrowed from type 'value_type' (aka 'long long') to 'int' in initializer list [-Wc++11-narrowing]
          prefix_dim_size, split_sizes_vec[i], suffix_dim_size};
                           ^~~~~~~~~~~~~~~~~~
tensorflow/core/kernels/split_v_op.cc:172:12: note: in instantiation of member function 'tensorflow::SplitVOpCPU<float, long long>::Compute' requested here
  explicit SplitVOpCPU(OpKernelConstruction* c) : Base(c) {}
           ^
tensorflow/core/kernels/split_v_op.cc:355:19: note: in instantiation of member function 'tensorflow::SplitVOpCPU<float, long long>::SplitVOpCPU' requested here
TF_CALL_ALL_TYPES(REGISTER_SPLIT_LEN);
                  ^
tensorflow/core/kernels/split_v_op.cc:212:28: note: insert an explicit cast to silence this issue
          prefix_dim_size, split_sizes_vec[i], suffix_dim_size};
                           ^~~~~~~~~~~~~~~~~~
                           static_cast<int>( )
tensorflow/core/kernels/split_v_op.cc:212:28: error: non-constant-expression cannot be narrowed from type 'value_type' (aka 'long long') to 'int' in initializer list [-Wc++11-narrowing]
          prefix_dim_size, split_sizes_vec[i], suffix_dim_size};
                           ^~~~~~~~~~~~~~~~~~
tensorflow/core/kernels/split_v_op.cc:172:12: note: in instantiation of member function 'tensorflow::SplitVOpCPU<tensorflow::bfloat16, long long>::Compute' requested here
  explicit SplitVOpCPU(OpKernelConstruction* c) : Base(c) {}
           ^
tensorflow/core/kernels/split_v_op.cc:356:1: note: in instantiation of member function 'tensorflow::SplitVOpCPU<tensorflow::bfloat16, long long>::SplitVOpCPU' requested here
REGISTER_SPLIT_LEN(bfloat16);
^
tensorflow/core/kernels/split_v_op.cc:353:3: note: expanded from macro 'REGISTER_SPLIT_LEN'
  REGISTER_SPLIT(type, int64);
  ^
tensorflow/core/kernels/split_v_op.cc:349:27: note: expanded from macro 'REGISTER_SPLIT'
                          SplitVOpCPU<type, len_type>);
                          ^
tensorflow/core/kernels/split_v_op.cc:212:28: note: insert an explicit cast to silence this issue
          prefix_dim_size, split_sizes_vec[i], suffix_dim_size};
                           ^~~~~~~~~~~~~~~~~~
                           static_cast<int>( )
3 errors generated.
Use --strategy=CppCompile=standalone to disable sandboxing for the failing actions.
Target //tensorflow/contrib/android:libtensorflow_inference.so failed to build
Use --verbose_failures to see the command lines of failed build steps.

Answer 1

这些错误来自 Android NDK r13 中从 gcc 到 Clang 的切换。为了在使用 Bazel 构建时获得最佳效果，暂时使用 NDK r12b。

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