Bazel, Protobuf, gRPC, and Python example?

[hai...@grakn.ai]

Hi everyone,

I've been struggling to get a comprehensive guide on how to use Bazel, Protobuf, gRPC, and Python together. There's also no official guide from the Bazel/GRPC docs.

Does anyone know any good examples on how to use all tools together? like a github repo?

Thank you!

[Evan Jones]

Ha, I just replied to your bazel-discuss post: https://groups.google.com/d/msg/bazel-discuss/-RDd-_Wt_EY/P9x2zqiiAQAJ

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[sabi...@gmail.com]

HI it seems pleasure to see you . currently i am working on Tensorflow detection Api . i want to build .So files using this command: 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 

but i am faced bazel build problem like this

ERROR: C:/users/sabir-pc/_bazel_sabir-pc/zp6kp3ov/external/com_google_absl/absl/strings/BUILD.bazel:32:1: C++ compilation of rule '@com_google_absl//absl/strings:strings' failed (Exit 1)

In file included from external/com_google_absl/absl/strings/internal/charconv_parse.cc:15:

In file included from external/com_google_absl\absl/strings/internal/charconv_parse.h:20:

external/com_google_absl\absl/strings/charconv.h:26:6: warning: scoped enumerations are a C++11 extension [-Wc++11-extensions]

enum class chars_format {

     ^

external/com_google_absl\absl/strings/charconv.h:77:55: warning: use of enumeration in a nested name specifier is a C++11 extension [-Wc++11-extensions]

                                   chars_format fmt = chars_format::general);

                                                      ^

external/com_google_absl\absl/strings/charconv.h:81:55: warning: use of enumeration in a nested name specifier is a C++11 extension [-Wc++11-extensions]

                                   chars_format fmt = chars_format::general);

                                                      ^

external/com_google_absl\absl/strings/charconv.h:85:8: error: unknown type name 'constexpr'

inline constexpr chars_format operator&(chars_format lhs, chars_format rhs) {

       ^

external/com_google_absl\absl/strings/charconv.h:85:1: warning: inline variables are a C++17 extension [-Wc++17-extensions]

inline constexpr chars_format operator&(chars_format lhs, chars_format rhs) {

^

external/com_google_absl\absl/strings/charconv.h:85:30: error: expected ';' after top level declarator

inline constexpr chars_format operator&(chars_format lhs, chars_format rhs) {

                             ^

                             ;

In file included from external/com_google_absl/absl/strings/internal/charconv_parse.cc:15:

external/com_google_absl\absl/strings/internal/charconv_parse.h:26:6: warning: scoped enumerations are a C++11 extension [-Wc++11-extensions]

enum class FloatType { kNumber, kInfinity, kNan };

     ^

external/com_google_absl\absl/strings/internal/charconv_parse.h:44:21: warning: in-class initialization of non-static data member is a C++11 extension [-Wc++11-extensions]

  uint64_t mantissa = 0;

                    ^

external/com_google_absl\absl/strings/internal/charconv_parse.h:50:16: warning: in-class initialization of non-static data member is a C++11 extension [-Wc++11-extensions]

  int exponent = 0;

               ^

external/com_google_absl\absl/strings/internal/charconv_parse.h:54:24: warning: in-class initialization of non-static data member is a C++11 extension [-Wc++11-extensions]

  int literal_exponent = 0;

                       ^

external/com_google_absl\absl/strings/internal/charconv_parse.h:57:18: warning: in-class initialization of non-static data member is a C++11 extension [-Wc++11-extensions]

  FloatType type = FloatType::kNumber;

                 ^

external/com_google_absl\absl/strings/internal/charconv_parse.h:67:30: warning: in-class initialization of non-static data member is a C++11 extension [-Wc++11-extensions]

  const char* subrange_begin = nullptr;

                             ^

external/com_google_absl\absl/strings/internal/charconv_parse.h:68:28: warning: in-class initialization of non-static data member is a C++11 extension [-Wc++11-extensions]

  const char* subrange_end = nullptr;

                           ^

external/com_google_absl\absl/strings/internal/charconv_parse.h:72:19: warning: in-class initialization of non-static data member is a C++11 extension [-Wc++11-extensions]

  const char* end = nullptr;

                  ^

external/com_google_absl\absl/strings/internal/charconv_parse.h:57:20: warning: use of enumeration in a nested name specifier is a C++11 extension [-Wc++11-extensions]

  FloatType type = FloatType::kNumber;

                   ^

In file included from external/com_google_absl/absl/strings/internal/charconv_parse.cc:22:

In file included from external/com_google_absl\absl/strings/internal/memutil.h:68:

In file included from external/com_google_absl\absl/base/port.h:23:

In file included from external/com_google_absl\absl/base/config.h:66:

external/com_google_absl\absl/base/policy_checks.h:77:2: error: "C++ versions less than C++11 are not supported."

#error "C++ versions less than C++11 are not supported."

 ^

In file included from external/com_google_absl/absl/strings/internal/charconv_parse.cc:22:

In file included from external/com_google_absl\absl/strings/internal/memutil.h:69:

In file included from external/com_google_absl\absl/strings/ascii.h:59:

In file included from external/com_google_absl\absl/strings/string_view.h:51:

external/com_google_absl\absl/base/internal/throw_delegate.h:39:2: error: expected expression

[[noreturn]] void ThrowStdLogicError(const std::string& what_arg);

 ^

external/com_google_absl\absl/base/internal/throw_delegate.h:39:14: error: expected unqualified-id

[[noreturn]] void ThrowStdLogicError(const std::string& what_arg);

             ^

external/com_google_absl\absl/base/internal/throw_delegate.h:40:2: error: expected expression

[[noreturn]] void ThrowStdLogicError(const char* what_arg);

 ^

external/com_google_absl\absl/base/internal/throw_delegate.h:40:14: error: expected unqualified-id

[[noreturn]] void ThrowStdLogicError(const char* what_arg);

             ^

external/com_google_absl\absl/base/internal/throw_delegate.h:41:2: error: expected expression

[[noreturn]] void ThrowStdInvalidArgument(const std::string& what_arg);

 ^

external/com_google_absl\absl/base/internal/throw_delegate.h:41:14: error: expected unqualified-id

[[noreturn]] void ThrowStdInvalidArgument(const std::string& what_arg);

             ^

external/com_google_absl\absl/base/internal/throw_delegate.h:42:2: error: expected expression

[[noreturn]] void ThrowStdInvalidArgument(const char* what_arg);

 ^

external/com_google_absl\absl/base/internal/throw_delegate.h:42:14: error: expected unqualified-id

[[noreturn]] void ThrowStdInvalidArgument(const char* what_arg);

             ^

external/com_google_absl\absl/base/internal/throw_delegate.h:43:2: error: expected expression

[[noreturn]] void ThrowStdDomainError(const std::string& what_arg);

 ^

external/com_google_absl\absl/base/internal/throw_delegate.h:43:14: error: expected unqualified-id

[[noreturn]] void ThrowStdDomainError(const std::string& what_arg);

             ^

external/com_google_absl\absl/base/internal/throw_delegate.h:44:2: error: expected expression

[[noreturn]] void ThrowStdDomainError(const char* what_arg);

 ^

external/com_google_absl\absl/base/internal/throw_delegate.h:44:14: error: expected unqualified-id

[[noreturn]] void ThrowStdDomainError(const char* what_arg);

             ^

external/com_google_absl\absl/base/internal/throw_delegate.h:45:2: error: expected expression

[[noreturn]] void ThrowStdLengthError(const std::string& what_arg);

 ^

external/com_google_absl\absl/base/internal/throw_delegate.h:45:14: error: expected unqualified-id

[[noreturn]] void ThrowStdLengthError(const std::string& what_arg);

             ^

external/com_google_absl\absl/base/internal/throw_delegate.h:46:2: error: expected expression

[[noreturn]] void ThrowStdLengthError(const char* what_arg);

 ^

external/com_google_absl\absl/base/internal/throw_delegate.h:46:14: error: expected unqualified-id

[[noreturn]] void ThrowStdLengthError(const char* what_arg);

             ^

fatal error: too many errors emitted, stopping now [-ferror-limit=]

13 warnings and 20 errors generated.

Target //tensorflow/contrib/android:libtensorflow_inference.so failed to build

Use --verbose_failures to see the command lines of failed build steps.

INFO: Elapsed time: 261.977s, Critical Path: 19.43s

INFO: 212 processes: 212 local.

FAILED: Build did NOT complete successfully

So if u have a good knowledge pleas guide us