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Can't install in ubuntu 20 #5

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BenWiseman opened this issue Dec 3, 2021 · 3 comments
Open

Can't install in ubuntu 20 #5

BenWiseman opened this issue Dec 3, 2021 · 3 comments

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@BenWiseman
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Installation results in a screed of errors. However it seems protobuf is already the newest version so I have no idea what's wrong.

sudo apt-get install -y libprotobuf-dev protobuf-compiler
[sudo] password for ben: 
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
libprotobuf-dev is already the newest version (3.12.4-1ubuntu2).
protobuf-compiler is already the newest version (3.12.4-1ubuntu2).

Ther error is like 1000 lines of this:

In file included from libcld3/feature_extractor.h:45,
                 from libcld3/embedding_feature_extractor.h:23,
                 from libcld3/nnet_language_identifier.h:22,
                 from wrapper.cpp:2:
./cld_3/protos/feature_extractor.pb.h:12:2: error: #error This file was generated by a newer version of protoc which is
   12 | #error This file was generated by a newer version of protoc which is
      |  ^~~~~
./cld_3/protos/feature_extractor.pb.h:13:2: error: #error incompatible with your Protocol Buffer headers. Please update
   13 | #error incompatible with your Protocol Buffer headers. Please update
      |  ^~~~~
./cld_3/protos/feature_extractor.pb.h:14:2: error: #error your headers.
   14 | #error your headers.
      |  ^~~~~
In file included from libcld3/task_context.h:23,
                 from libcld3/feature_extractor.h:49,
                 from libcld3/embedding_feature_extractor.h:23,
                 from libcld3/nnet_language_identifier.h:22,
                 from wrapper.cpp:2:
./cld_3/protos/task_spec.pb.h:12:2: error: #error This file was generated by a newer version of protoc which is
   12 | #error This file was generated by a newer version of protoc which is
      |  ^~~~~
./cld_3/protos/task_spec.pb.h:13:2: error: #error incompatible with your Protocol Buffer headers. Please update
   13 | #error incompatible with your Protocol Buffer headers. Please update
      |  ^~~~~
./cld_3/protos/task_spec.pb.h:14:2: error: #error your headers.
   14 | #error your headers.
      |  ^~~~~
In file included from libcld3/language_identifier_features.h:24,
                 from libcld3/nnet_language_identifier.h:25,
                 from wrapper.cpp:2:
./cld_3/protos/sentence.pb.h:12:2: error: #error This file was generated by a newer version of protoc which is
   12 | #error This file was generated by a newer version of protoc which is
      |  ^~~~~
./cld_3/protos/sentence.pb.h:13:2: error: #error incompatible with your Protocol Buffer headers. Please update
   13 | #error incompatible with your Protocol Buffer headers. Please update
      |  ^~~~~
./cld_3/protos/sentence.pb.h:14:2: error: #error your headers.
   14 | #error your headers.
      |  ^~~~~
@jeroen
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jeroen commented Dec 3, 2021

Can you show the full install log please? I suspect you have another conflicting installation of protobuf on your machine

@BenWiseman
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Installing 'cld3' ...
Installing package into ‘/home/ben/R/x86_64-pc-linux-gnu-library/4.1’
(as ‘lib’ is unspecified)
trying URL 'https://cloud.r-project.org/src/contrib/cld3_1.4.2.tar.gz'
Content type 'application/x-gzip' length 653632 bytes (638 KB)
==================================================
downloaded 638 KB

Found pkg-config cflags and libs!
Using PKG_CFLAGS=-pthread
Using PKG_LIBS=-lprotobuf
* installing *source* package ‘cld3’ ...
** package ‘cld3’ successfully unpacked and MD5 sums checked
** using staged installation
Using libprotoc 3.14.0 from /home/ben/anaconda3/envs/r-tensorflow/bin/protoc
Warning: protoc version libprotoc 3.14.0 might not match libproto version 3.12.4
rm -f cld3.so RcppExports.o wrapper.o libcld3/base.o libcld3/embedding_feature_extractor.o libcld3/embedding_network.o libcld3/feature_extractor.o libcld3/feature_types.o libcld3/fml_parser.o libcld3/language_identifier_features.o libcld3/lang_id_nn_params.o libcld3/nnet_language_identifier.o libcld3/registry.o libcld3/relevant_script_feature.o libcld3/sentence_features.o libcld3/script_span/fixunicodevalue.o libcld3/script_span/generated_entities.o libcld3/script_span/generated_ulscript.o libcld3/script_span/getonescriptspan.o libcld3/script_span/offsetmap.o libcld3/script_span/text_processing.o libcld3/script_span/utf8statetable.o libcld3/task_context.o libcld3/task_context_params.o libcld3/unicodetext.o libcld3/utils.o libcld3/workspace.o cld_3/protos/feature_extractor.pb.o cld_3/protos/sentence.pb.o cld_3/protos/task_spec.pb.o libcld3/libstatcld3.a
g++ -std=gnu++11 -I"/usr/share/R/include" -DNDEBUG -I. -pthread -I'/usr/local/lib/R/site-library/Rcpp/include'    -fpic  -g -O2 -fdebug-prefix-map=/build/r-base-i2PIHO/r-base-4.1.2=. -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -g  -c RcppExports.cpp -o RcppExports.o
** libs
g++ -std=gnu++11 -I"/usr/share/R/include" -DNDEBUG -I. -pthread -I'/usr/local/lib/R/site-library/Rcpp/include'    -fpic  -g -O2 -fdebug-prefix-map=/build/r-base-i2PIHO/r-base-4.1.2=. -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -g  -c wrapper.cpp -o wrapper.o
In file included from libcld3/feature_extractor.h:45,
                 from libcld3/embedding_feature_extractor.h:23,
                 from libcld3/nnet_language_identifier.h:22,
                 from wrapper.cpp:2:
./cld_3/protos/feature_extractor.pb.h:12:2: error: #error This file was generated by a newer version of protoc which is
   12 | #error This file was generated by a newer version of protoc which is
      |  ^~~~~
./cld_3/protos/feature_extractor.pb.h:13:2: error: #error incompatible with your Protocol Buffer headers. Please update
   13 | #error incompatible with your Protocol Buffer headers. Please update
      |  ^~~~~
./cld_3/protos/feature_extractor.pb.h:14:2: error: #error your headers.
   14 | #error your headers.
      |  ^~~~~
In file included from libcld3/task_context.h:23,
                 from libcld3/feature_extractor.h:49,
                 from libcld3/embedding_feature_extractor.h:23,
                 from libcld3/nnet_language_identifier.h:22,
                 from wrapper.cpp:2:
./cld_3/protos/task_spec.pb.h:12:2: error: #error This file was generated by a newer version of protoc which is
   12 | #error This file was generated by a newer version of protoc which is
      |  ^~~~~
./cld_3/protos/task_spec.pb.h:13:2: error: #error incompatible with your Protocol Buffer headers. Please update
   13 | #error incompatible with your Protocol Buffer headers. Please update
      |  ^~~~~
./cld_3/protos/task_spec.pb.h:14:2: error: #error your headers.
   14 | #error your headers.
      |  ^~~~~
In file included from libcld3/language_identifier_features.h:24,
                 from libcld3/nnet_language_identifier.h:25,
                 from wrapper.cpp:2:
./cld_3/protos/sentence.pb.h:12:2: error: #error This file was generated by a newer version of protoc which is
   12 | #error This file was generated by a newer version of protoc which is
      |  ^~~~~
./cld_3/protos/sentence.pb.h:13:2: error: #error incompatible with your Protocol Buffer headers. Please update
   13 | #error incompatible with your Protocol Buffer headers. Please update
      |  ^~~~~
./cld_3/protos/sentence.pb.h:14:2: error: #error your headers.
   14 | #error your headers.
      |  ^~~~~
In file included from libcld3/feature_extractor.h:45,
                 from libcld3/embedding_feature_extractor.h:23,
                 from libcld3/nnet_language_identifier.h:22,
                 from wrapper.cpp:2:
./cld_3/protos/feature_extractor.pb.h:45:51: error: ‘AuxiliaryParseTableField’ in namespace ‘google::protobuf::internal’ does not name a type; did you mean ‘AuxillaryParseTableField’?
   45 |   static const ::PROTOBUF_NAMESPACE_ID::internal::AuxiliaryParseTableField aux[]
      |                                                   ^~~~~~~~~~~~~~~~~~~~~~~~
      |                                                   AuxillaryParseTableField
In file included from libcld3/feature_extractor.h:45,
                 from libcld3/embedding_feature_extractor.h:23,
                 from libcld3/nnet_language_identifier.h:22,
                 from wrapper.cpp:2:
./cld_3/protos/feature_extractor.pb.h: In member function ‘void chrome_lang_id::Parameter::clear_name()’:
./cld_3/protos/feature_extractor.pb.h:607:22: error: no matching function for call to ‘google::protobuf::internal::ArenaStringPtr::ClearToEmpty()’
  607 |   name_.ClearToEmpty();
      |                      ^
In file included from ./cld_3/protos/feature_extractor.pb.h:25,
                 from libcld3/feature_extractor.h:45,
                 from libcld3/embedding_feature_extractor.h:23,
                 from libcld3/nnet_language_identifier.h:22,
                 from wrapper.cpp:2:
/usr/include/google/protobuf/arenastring.h:220:15: note: candidate: ‘void google::protobuf::internal::ArenaStringPtr::ClearToEmpty(const string*, google::protobuf::Arena*)’
  220 |   inline void ClearToEmpty(const ::std::string* default_value,
      |               ^~~~~~~~~~~~
/usr/include/google/protobuf/arenastring.h:220:15: note:   candidate expects 2 arguments, 0 provided
In file included from libcld3/feature_extractor.h:45,
                 from libcld3/embedding_feature_extractor.h:23,
                 from libcld3/nnet_language_identifier.h:22,
                 from wrapper.cpp:2:
./cld_3/protos/feature_extractor.pb.h: In member function ‘void chrome_lang_id::Parameter::_internal_set_name(const string&)’:
./cld_3/protos/feature_extractor.pb.h:627:64: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
  627 |   name_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, value, GetArena());
      |                                                                ^~~~~~~~~~~~
./cld_3/protos/feature_extractor.pb.h: In member function ‘void chrome_lang_id::Parameter::set_name(std::string&&)’:
./cld_3/protos/feature_extractor.pb.h:632:56: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
  632 |     ::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::move(value), GetArena());
      |                                                        ^~~~~~~~~~~~
./cld_3/protos/feature_extractor.pb.h: In member function ‘void chrome_lang_id::Parameter::set_name(const char*)’:
./cld_3/protos/feature_extractor.pb.h:638:64: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
  638 |   name_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::string(value), GetArena());
      |                                                                ^~~~~~~~~~~~
./cld_3/protos/feature_extractor.pb.h: In member function ‘void chrome_lang_id::Parameter::set_name(const char*, size_t)’:
./cld_3/protos/feature_extractor.pb.h:644:64: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
  644 |   name_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::string(
      |                                                                ^~~~~~~~~~~~
./cld_3/protos/feature_extractor.pb.h: In member function ‘std::string* chrome_lang_id::Parameter::_internal_mutable_name()’:
./cld_3/protos/feature_extractor.pb.h:650:75: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
  650 |   return name_.Mutable(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, GetArena());
      |                                                                           ^~~~~~~~~~~~
./cld_3/protos/feature_extractor.pb.h: In member function ‘void chrome_lang_id::Parameter::clear_value()’:
./cld_3/protos/feature_extractor.pb.h:680:23: error: no matching function for call to ‘google::protobuf::internal::ArenaStringPtr::ClearToEmpty()’
  680 |   value_.ClearToEmpty();
      |                       ^
In file included from ./cld_3/protos/feature_extractor.pb.h:25,
                 from libcld3/feature_extractor.h:45,
                 from libcld3/embedding_feature_extractor.h:23,
                 from libcld3/nnet_language_identifier.h:22,
                 from wrapper.cpp:2:
/usr/include/google/protobuf/arenastring.h:220:15: note: candidate: ‘void google::protobuf::internal::ArenaStringPtr::ClearToEmpty(const string*, google::protobuf::Arena*)’
  220 |   inline void ClearToEmpty(const ::std::string* default_value,
      |               ^~~~~~~~~~~~
/usr/include/google/protobuf/arenastring.h:220:15: note:   candidate expects 2 arguments, 0 provided
In file included from libcld3/feature_extractor.h:45,
                 from libcld3/embedding_feature_extractor.h:23,
                 from libcld3/nnet_language_identifier.h:22,
                 from wrapper.cpp:2:
./cld_3/protos/feature_extractor.pb.h: In member function ‘void chrome_lang_id::Parameter::_internal_set_value(const string&)’:
./cld_3/protos/feature_extractor.pb.h:700:65: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
  700 |   value_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, value, GetArena());
      |                                                                 ^~~~~~~~~~~~
./cld_3/protos/feature_extractor.pb.h: In member function ‘void chrome_lang_id::Parameter::set_value(std::string&&)’:
./cld_3/protos/feature_extractor.pb.h:705:56: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
  705 |     ::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::move(value), GetArena());
      |                                                        ^~~~~~~~~~~~
./cld_3/protos/feature_extractor.pb.h: In member function ‘void chrome_lang_id::Parameter::set_value(const char*)’:
./cld_3/protos/feature_extractor.pb.h:711:65: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
  711 |   value_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::string(value), GetArena());
      |                                                                 ^~~~~~~~~~~~
./cld_3/protos/feature_extractor.pb.h: In member function ‘void chrome_lang_id::Parameter::set_value(const char*, size_t)’:
./cld_3/protos/feature_extractor.pb.h:717:65: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
  717 |   value_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::string(
      |                                                                 ^~~~~~~~~~~~
./cld_3/protos/feature_extractor.pb.h: In member function ‘std::string* chrome_lang_id::Parameter::_internal_mutable_value()’:
./cld_3/protos/feature_extractor.pb.h:723:76: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
  723 |   return value_.Mutable(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, GetArena());
      |                                                                            ^~~~~~~~~~~~
./cld_3/protos/feature_extractor.pb.h: In member function ‘void chrome_lang_id::FeatureFunctionDescriptor::clear_type()’:
./cld_3/protos/feature_extractor.pb.h:757:22: error: no matching function for call to ‘google::protobuf::internal::ArenaStringPtr::ClearToEmpty()’
  757 |   type_.ClearToEmpty();
      |                      ^
In file included from ./cld_3/protos/feature_extractor.pb.h:25,
                 from libcld3/feature_extractor.h:45,
                 from libcld3/embedding_feature_extractor.h:23,
                 from libcld3/nnet_language_identifier.h:22,
                 from wrapper.cpp:2:
/usr/include/google/protobuf/arenastring.h:220:15: note: candidate: ‘void google::protobuf::internal::ArenaStringPtr::ClearToEmpty(const string*, google::protobuf::Arena*)’
  220 |   inline void ClearToEmpty(const ::std::string* default_value,
      |               ^~~~~~~~~~~~
/usr/include/google/protobuf/arenastring.h:220:15: note:   candidate expects 2 arguments, 0 provided
In file included from libcld3/feature_extractor.h:45,
                 from libcld3/embedding_feature_extractor.h:23,
                 from libcld3/nnet_language_identifier.h:22,
                 from wrapper.cpp:2:
./cld_3/protos/feature_extractor.pb.h: In member function ‘void chrome_lang_id::FeatureFunctionDescriptor::_internal_set_type(const string&)’:
./cld_3/protos/feature_extractor.pb.h:777:64: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
  777 |   type_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, value, GetArena());
      |                                                                ^~~~~~~~~~~~
./cld_3/protos/feature_extractor.pb.h: In member function ‘void chrome_lang_id::FeatureFunctionDescriptor::set_type(std::string&&)’:
./cld_3/protos/feature_extractor.pb.h:782:56: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
  782 |     ::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::move(value), GetArena());
      |                                                        ^~~~~~~~~~~~
./cld_3/protos/feature_extractor.pb.h: In member function ‘void chrome_lang_id::FeatureFunctionDescriptor::set_type(const char*)’:
./cld_3/protos/feature_extractor.pb.h:788:64: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
  788 |   type_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::string(value), GetArena());
      |                                                                ^~~~~~~~~~~~
./cld_3/protos/feature_extractor.pb.h: In member function ‘void chrome_lang_id::FeatureFunctionDescriptor::set_type(const char*, size_t)’:
./cld_3/protos/feature_extractor.pb.h:794:64: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
  794 |   type_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::string(
      |                                                                ^~~~~~~~~~~~
./cld_3/protos/feature_extractor.pb.h: In member function ‘std::string* chrome_lang_id::FeatureFunctionDescriptor::_internal_mutable_type()’:
./cld_3/protos/feature_extractor.pb.h:800:75: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
  800 |   return type_.Mutable(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, GetArena());
      |                                                                           ^~~~~~~~~~~~
./cld_3/protos/feature_extractor.pb.h: In member function ‘void chrome_lang_id::FeatureFunctionDescriptor::clear_name()’:
./cld_3/protos/feature_extractor.pb.h:830:22: error: no matching function for call to ‘google::protobuf::internal::ArenaStringPtr::ClearToEmpty()’
  830 |   name_.ClearToEmpty();
      |                      ^
In file included from ./cld_3/protos/feature_extractor.pb.h:25,
                 from libcld3/feature_extractor.h:45,
                 from libcld3/embedding_feature_extractor.h:23,
                 from libcld3/nnet_language_identifier.h:22,
                 from wrapper.cpp:2:
/usr/include/google/protobuf/arenastring.h:220:15: note: candidate: ‘void google::protobuf::internal::ArenaStringPtr::ClearToEmpty(const string*, google::protobuf::Arena*)’
  220 |   inline void ClearToEmpty(const ::std::string* default_value,
      |               ^~~~~~~~~~~~
/usr/include/google/protobuf/arenastring.h:220:15: note:   candidate expects 2 arguments, 0 provided
In file included from libcld3/feature_extractor.h:45,
                 from libcld3/embedding_feature_extractor.h:23,
                 from libcld3/nnet_language_identifier.h:22,
                 from wrapper.cpp:2:
./cld_3/protos/feature_extractor.pb.h: In member function ‘void chrome_lang_id::FeatureFunctionDescriptor::_internal_set_name(const string&)’:
./cld_3/protos/feature_extractor.pb.h:850:64: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
  850 |   name_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, value, GetArena());
      |                                                                ^~~~~~~~~~~~
./cld_3/protos/feature_extractor.pb.h: In member function ‘void chrome_lang_id::FeatureFunctionDescriptor::set_name(std::string&&)’:
./cld_3/protos/feature_extractor.pb.h:855:56: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
  855 |     ::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::move(value), GetArena());
      |                                                        ^~~~~~~~~~~~
./cld_3/protos/feature_extractor.pb.h: In member function ‘void chrome_lang_id::FeatureFunctionDescriptor::set_name(const char*)’:
./cld_3/protos/feature_extractor.pb.h:861:64: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
  861 |   name_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::string(value), GetArena());
      |                                                                ^~~~~~~~~~~~
./cld_3/protos/feature_extractor.pb.h: In member function ‘void chrome_lang_id::FeatureFunctionDescriptor::set_name(const char*, size_t)’:
./cld_3/protos/feature_extractor.pb.h:867:64: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
  867 |   name_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::string(
      |                                                                ^~~~~~~~~~~~
./cld_3/protos/feature_extractor.pb.h: In member function ‘std::string* chrome_lang_id::FeatureFunctionDescriptor::_internal_mutable_name()’:
./cld_3/protos/feature_extractor.pb.h:873:75: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
  873 |   return name_.Mutable(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, GetArena());
      |                                                                           ^~~~~~~~~~~~
In file included from libcld3/task_context.h:23,
                 from libcld3/feature_extractor.h:49,
                 from libcld3/embedding_feature_extractor.h:23,
                 from libcld3/nnet_language_identifier.h:22,
                 from wrapper.cpp:2:
./cld_3/protos/task_spec.pb.h: At global scope:
./cld_3/protos/task_spec.pb.h:45:51: error: ‘AuxiliaryParseTableField’ in namespace ‘google::protobuf::internal’ does not name a type; did you mean ‘AuxillaryParseTableField’?
   45 |   static const ::PROTOBUF_NAMESPACE_ID::internal::AuxiliaryParseTableField aux[]
      |                                                   ^~~~~~~~~~~~~~~~~~~~~~~~
      |                                                   AuxillaryParseTableField
In file included from libcld3/task_context.h:23,
                 from libcld3/feature_extractor.h:49,
                 from libcld3/embedding_feature_extractor.h:23,
                 from libcld3/nnet_language_identifier.h:22,
                 from wrapper.cpp:2:
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskInput_Part::clear_file_pattern()’:
./cld_3/protos/task_spec.pb.h:1163:30: error: no matching function for call to ‘google::protobuf::internal::ArenaStringPtr::ClearToEmpty()’
 1163 |   file_pattern_.ClearToEmpty();
      |                              ^
In file included from ./cld_3/protos/feature_extractor.pb.h:25,
                 from libcld3/feature_extractor.h:45,
                 from libcld3/embedding_feature_extractor.h:23,
                 from libcld3/nnet_language_identifier.h:22,
                 from wrapper.cpp:2:
/usr/include/google/protobuf/arenastring.h:220:15: note: candidate: ‘void google::protobuf::internal::ArenaStringPtr::ClearToEmpty(const string*, google::protobuf::Arena*)’
  220 |   inline void ClearToEmpty(const ::std::string* default_value,
      |               ^~~~~~~~~~~~
/usr/include/google/protobuf/arenastring.h:220:15: note:   candidate expects 2 arguments, 0 provided
In file included from libcld3/task_context.h:23,
                 from libcld3/feature_extractor.h:49,
                 from libcld3/embedding_feature_extractor.h:23,
                 from libcld3/nnet_language_identifier.h:22,
                 from wrapper.cpp:2:
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskInput_Part::_internal_set_file_pattern(const string&)’:
./cld_3/protos/task_spec.pb.h:1183:72: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 1183 |   file_pattern_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, value, GetArena());
      |                                                                        ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskInput_Part::set_file_pattern(std::string&&)’:
./cld_3/protos/task_spec.pb.h:1188:56: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 1188 |     ::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::move(value), GetArena());
      |                                                        ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskInput_Part::set_file_pattern(const char*)’:
./cld_3/protos/task_spec.pb.h:1194:72: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 1194 |   file_pattern_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::string(value), GetArena());
      |                                                                        ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskInput_Part::set_file_pattern(const char*, size_t)’:
./cld_3/protos/task_spec.pb.h:1200:72: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 1200 |   file_pattern_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::string(
      |                                                                        ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘std::string* chrome_lang_id::TaskInput_Part::_internal_mutable_file_pattern()’:
./cld_3/protos/task_spec.pb.h:1206:83: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 1206 |   return file_pattern_.Mutable(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, GetArena());
      |                                                                                   ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskInput_Part::clear_file_format()’:
./cld_3/protos/task_spec.pb.h:1236:29: error: no matching function for call to ‘google::protobuf::internal::ArenaStringPtr::ClearToEmpty()’
 1236 |   file_format_.ClearToEmpty();
      |                             ^
In file included from ./cld_3/protos/feature_extractor.pb.h:25,
                 from libcld3/feature_extractor.h:45,
                 from libcld3/embedding_feature_extractor.h:23,
                 from libcld3/nnet_language_identifier.h:22,
                 from wrapper.cpp:2:
/usr/include/google/protobuf/arenastring.h:220:15: note: candidate: ‘void google::protobuf::internal::ArenaStringPtr::ClearToEmpty(const string*, google::protobuf::Arena*)’
  220 |   inline void ClearToEmpty(const ::std::string* default_value,
      |               ^~~~~~~~~~~~
/usr/include/google/protobuf/arenastring.h:220:15: note:   candidate expects 2 arguments, 0 provided
In file included from libcld3/task_context.h:23,
                 from libcld3/feature_extractor.h:49,
                 from libcld3/embedding_feature_extractor.h:23,
                 from libcld3/nnet_language_identifier.h:22,
                 from wrapper.cpp:2:
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskInput_Part::_internal_set_file_format(const string&)’:
./cld_3/protos/task_spec.pb.h:1256:71: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 1256 |   file_format_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, value, GetArena());
      |                                                                       ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskInput_Part::set_file_format(std::string&&)’:
./cld_3/protos/task_spec.pb.h:1261:56: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 1261 |     ::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::move(value), GetArena());
      |                                                        ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskInput_Part::set_file_format(const char*)’:
./cld_3/protos/task_spec.pb.h:1267:71: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 1267 |   file_format_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::string(value), GetArena());
      |                                                                       ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskInput_Part::set_file_format(const char*, size_t)’:
./cld_3/protos/task_spec.pb.h:1273:71: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 1273 |   file_format_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::string(
      |                                                                       ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘std::string* chrome_lang_id::TaskInput_Part::_internal_mutable_file_format()’:
./cld_3/protos/task_spec.pb.h:1279:82: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 1279 |   return file_format_.Mutable(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, GetArena());
      |                                                                                  ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskInput_Part::clear_record_format()’:
./cld_3/protos/task_spec.pb.h:1309:31: error: no matching function for call to ‘google::protobuf::internal::ArenaStringPtr::ClearToEmpty()’
 1309 |   record_format_.ClearToEmpty();
      |                               ^
In file included from ./cld_3/protos/feature_extractor.pb.h:25,
                 from libcld3/feature_extractor.h:45,
                 from libcld3/embedding_feature_extractor.h:23,
                 from libcld3/nnet_language_identifier.h:22,
                 from wrapper.cpp:2:
/usr/include/google/protobuf/arenastring.h:220:15: note: candidate: ‘void google::protobuf::internal::ArenaStringPtr::ClearToEmpty(const string*, google::protobuf::Arena*)’
  220 |   inline void ClearToEmpty(const ::std::string* default_value,
      |               ^~~~~~~~~~~~
/usr/include/google/protobuf/arenastring.h:220:15: note:   candidate expects 2 arguments, 0 provided
In file included from libcld3/task_context.h:23,
                 from libcld3/feature_extractor.h:49,
                 from libcld3/embedding_feature_extractor.h:23,
                 from libcld3/nnet_language_identifier.h:22,
                 from wrapper.cpp:2:
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskInput_Part::_internal_set_record_format(const string&)’:
./cld_3/protos/task_spec.pb.h:1329:73: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 1329 |   record_format_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, value, GetArena());
      |                                                                         ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskInput_Part::set_record_format(std::string&&)’:
./cld_3/protos/task_spec.pb.h:1334:56: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 1334 |     ::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::move(value), GetArena());
      |                                                        ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskInput_Part::set_record_format(const char*)’:
./cld_3/protos/task_spec.pb.h:1340:73: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 1340 |   record_format_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::string(value), GetArena());
      |                                                                         ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskInput_Part::set_record_format(const char*, size_t)’:
./cld_3/protos/task_spec.pb.h:1346:73: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 1346 |   record_format_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::string(
      |                                                                         ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘std::string* chrome_lang_id::TaskInput_Part::_internal_mutable_record_format()’:
./cld_3/protos/task_spec.pb.h:1352:84: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 1352 |   return record_format_.Mutable(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, GetArena());
      |                                                                                    ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskInput::clear_name()’:
./cld_3/protos/task_spec.pb.h:1386:22: error: no matching function for call to ‘google::protobuf::internal::ArenaStringPtr::ClearToEmpty()’
 1386 |   name_.ClearToEmpty();
      |                      ^
In file included from ./cld_3/protos/feature_extractor.pb.h:25,
                 from libcld3/feature_extractor.h:45,
                 from libcld3/embedding_feature_extractor.h:23,
                 from libcld3/nnet_language_identifier.h:22,
                 from wrapper.cpp:2:
/usr/include/google/protobuf/arenastring.h:220:15: note: candidate: ‘void google::protobuf::internal::ArenaStringPtr::ClearToEmpty(const string*, google::protobuf::Arena*)’
  220 |   inline void ClearToEmpty(const ::std::string* default_value,
      |               ^~~~~~~~~~~~
/usr/include/google/protobuf/arenastring.h:220:15: note:   candidate expects 2 arguments, 0 provided
In file included from libcld3/task_context.h:23,
                 from libcld3/feature_extractor.h:49,
                 from libcld3/embedding_feature_extractor.h:23,
                 from libcld3/nnet_language_identifier.h:22,
                 from wrapper.cpp:2:
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskInput::_internal_set_name(const string&)’:
./cld_3/protos/task_spec.pb.h:1406:64: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 1406 |   name_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, value, GetArena());
      |                                                                ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskInput::set_name(std::string&&)’:
./cld_3/protos/task_spec.pb.h:1411:56: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 1411 |     ::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::move(value), GetArena());
      |                                                        ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskInput::set_name(const char*)’:
./cld_3/protos/task_spec.pb.h:1417:64: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 1417 |   name_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::string(value), GetArena());
      |                                                                ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskInput::set_name(const char*, size_t)’:
./cld_3/protos/task_spec.pb.h:1423:64: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 1423 |   name_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::string(
      |                                                                ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘std::string* chrome_lang_id::TaskInput::_internal_mutable_name()’:
./cld_3/protos/task_spec.pb.h:1429:75: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 1429 |   return name_.Mutable(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, GetArena());
      |                                                                           ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskInput::clear_creator()’:
./cld_3/protos/task_spec.pb.h:1459:25: error: no matching function for call to ‘google::protobuf::internal::ArenaStringPtr::ClearToEmpty()’
 1459 |   creator_.ClearToEmpty();
      |                         ^
In file included from ./cld_3/protos/feature_extractor.pb.h:25,
                 from libcld3/feature_extractor.h:45,
                 from libcld3/embedding_feature_extractor.h:23,
                 from libcld3/nnet_language_identifier.h:22,
                 from wrapper.cpp:2:
/usr/include/google/protobuf/arenastring.h:220:15: note: candidate: ‘void google::protobuf::internal::ArenaStringPtr::ClearToEmpty(const string*, google::protobuf::Arena*)’
  220 |   inline void ClearToEmpty(const ::std::string* default_value,
      |               ^~~~~~~~~~~~
/usr/include/google/protobuf/arenastring.h:220:15: note:   candidate expects 2 arguments, 0 provided
In file included from libcld3/task_context.h:23,
                 from libcld3/feature_extractor.h:49,
                 from libcld3/embedding_feature_extractor.h:23,
                 from libcld3/nnet_language_identifier.h:22,
                 from wrapper.cpp:2:
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskInput::_internal_set_creator(const string&)’:
./cld_3/protos/task_spec.pb.h:1479:67: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 1479 |   creator_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, value, GetArena());
      |                                                                   ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskInput::set_creator(std::string&&)’:
./cld_3/protos/task_spec.pb.h:1484:56: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 1484 |     ::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::move(value), GetArena());
      |                                                        ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskInput::set_creator(const char*)’:
./cld_3/protos/task_spec.pb.h:1490:67: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 1490 |   creator_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::string(value), GetArena());
      |                                                                   ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskInput::set_creator(const char*, size_t)’:
./cld_3/protos/task_spec.pb.h:1496:67: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 1496 |   creator_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::string(
      |                                                                   ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘std::string* chrome_lang_id::TaskInput::_internal_mutable_creator()’:
./cld_3/protos/task_spec.pb.h:1502:78: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 1502 |   return creator_.Mutable(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, GetArena());
      |                                                                              ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskOutput::clear_name()’:
./cld_3/protos/task_spec.pb.h:1751:22: error: no matching function for call to ‘google::protobuf::internal::ArenaStringPtr::ClearToEmpty()’
 1751 |   name_.ClearToEmpty();
      |                      ^
In file included from ./cld_3/protos/feature_extractor.pb.h:25,
                 from libcld3/feature_extractor.h:45,
                 from libcld3/embedding_feature_extractor.h:23,
                 from libcld3/nnet_language_identifier.h:22,
                 from wrapper.cpp:2:
/usr/include/google/protobuf/arenastring.h:220:15: note: candidate: ‘void google::protobuf::internal::ArenaStringPtr::ClearToEmpty(const string*, google::protobuf::Arena*)’
  220 |   inline void ClearToEmpty(const ::std::string* default_value,
      |               ^~~~~~~~~~~~
/usr/include/google/protobuf/arenastring.h:220:15: note:   candidate expects 2 arguments, 0 provided
In file included from libcld3/task_context.h:23,
                 from libcld3/feature_extractor.h:49,
                 from libcld3/embedding_feature_extractor.h:23,
                 from libcld3/nnet_language_identifier.h:22,
                 from wrapper.cpp:2:
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskOutput::_internal_set_name(const string&)’:
./cld_3/protos/task_spec.pb.h:1771:64: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 1771 |   name_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, value, GetArena());
      |                                                                ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskOutput::set_name(std::string&&)’:
./cld_3/protos/task_spec.pb.h:1776:56: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 1776 |     ::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::move(value), GetArena());
      |                                                        ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskOutput::set_name(const char*)’:
./cld_3/protos/task_spec.pb.h:1782:64: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 1782 |   name_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::string(value), GetArena());
      |                                                                ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskOutput::set_name(const char*, size_t)’:
./cld_3/protos/task_spec.pb.h:1788:64: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 1788 |   name_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::string(
      |                                                                ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘std::string* chrome_lang_id::TaskOutput::_internal_mutable_name()’:
./cld_3/protos/task_spec.pb.h:1794:75: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 1794 |   return name_.Mutable(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, GetArena());
      |                                                                           ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskOutput::clear_file_format()’:
./cld_3/protos/task_spec.pb.h:1824:29: error: no matching function for call to ‘google::protobuf::internal::ArenaStringPtr::ClearToEmpty()’
 1824 |   file_format_.ClearToEmpty();
      |                             ^
In file included from ./cld_3/protos/feature_extractor.pb.h:25,
                 from libcld3/feature_extractor.h:45,
                 from libcld3/embedding_feature_extractor.h:23,
                 from libcld3/nnet_language_identifier.h:22,
                 from wrapper.cpp:2:
/usr/include/google/protobuf/arenastring.h:220:15: note: candidate: ‘void google::protobuf::internal::ArenaStringPtr::ClearToEmpty(const string*, google::protobuf::Arena*)’
  220 |   inline void ClearToEmpty(const ::std::string* default_value,
      |               ^~~~~~~~~~~~
/usr/include/google/protobuf/arenastring.h:220:15: note:   candidate expects 2 arguments, 0 provided
In file included from libcld3/task_context.h:23,
                 from libcld3/feature_extractor.h:49,
                 from libcld3/embedding_feature_extractor.h:23,
                 from libcld3/nnet_language_identifier.h:22,
                 from wrapper.cpp:2:
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskOutput::_internal_set_file_format(const string&)’:
./cld_3/protos/task_spec.pb.h:1844:71: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 1844 |   file_format_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, value, GetArena());
      |                                                                       ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskOutput::set_file_format(std::string&&)’:
./cld_3/protos/task_spec.pb.h:1849:56: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 1849 |     ::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::move(value), GetArena());
      |                                                        ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskOutput::set_file_format(const char*)’:
./cld_3/protos/task_spec.pb.h:1855:71: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 1855 |   file_format_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::string(value), GetArena());
      |                                                                       ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskOutput::set_file_format(const char*, size_t)’:
./cld_3/protos/task_spec.pb.h:1861:71: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 1861 |   file_format_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::string(
      |                                                                       ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘std::string* chrome_lang_id::TaskOutput::_internal_mutable_file_format()’:
./cld_3/protos/task_spec.pb.h:1867:82: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 1867 |   return file_format_.Mutable(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, GetArena());
      |                                                                                  ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskOutput::clear_record_format()’:
./cld_3/protos/task_spec.pb.h:1897:31: error: no matching function for call to ‘google::protobuf::internal::ArenaStringPtr::ClearToEmpty()’
 1897 |   record_format_.ClearToEmpty();
      |                               ^
In file included from ./cld_3/protos/feature_extractor.pb.h:25,
                 from libcld3/feature_extractor.h:45,
                 from libcld3/embedding_feature_extractor.h:23,
                 from libcld3/nnet_language_identifier.h:22,
                 from wrapper.cpp:2:
/usr/include/google/protobuf/arenastring.h:220:15: note: candidate: ‘void google::protobuf::internal::ArenaStringPtr::ClearToEmpty(const string*, google::protobuf::Arena*)’
  220 |   inline void ClearToEmpty(const ::std::string* default_value,
      |               ^~~~~~~~~~~~
/usr/include/google/protobuf/arenastring.h:220:15: note:   candidate expects 2 arguments, 0 provided
In file included from libcld3/task_context.h:23,
                 from libcld3/feature_extractor.h:49,
                 from libcld3/embedding_feature_extractor.h:23,
                 from libcld3/nnet_language_identifier.h:22,
                 from wrapper.cpp:2:
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskOutput::_internal_set_record_format(const string&)’:
./cld_3/protos/task_spec.pb.h:1917:73: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 1917 |   record_format_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, value, GetArena());
      |                                                                         ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskOutput::set_record_format(std::string&&)’:
./cld_3/protos/task_spec.pb.h:1922:56: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 1922 |     ::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::move(value), GetArena());
      |                                                        ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskOutput::set_record_format(const char*)’:
./cld_3/protos/task_spec.pb.h:1928:73: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 1928 |   record_format_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::string(value), GetArena());
      |                                                                         ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskOutput::set_record_format(const char*, size_t)’:
./cld_3/protos/task_spec.pb.h:1934:73: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 1934 |   record_format_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::string(
      |                                                                         ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘std::string* chrome_lang_id::TaskOutput::_internal_mutable_record_format()’:
./cld_3/protos/task_spec.pb.h:1940:84: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 1940 |   return record_format_.Mutable(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, GetArena());
      |                                                                                    ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskOutput::clear_file_base()’:
./cld_3/protos/task_spec.pb.h:1998:27: error: no matching function for call to ‘google::protobuf::internal::ArenaStringPtr::ClearToEmpty()’
 1998 |   file_base_.ClearToEmpty();
      |                           ^
In file included from ./cld_3/protos/feature_extractor.pb.h:25,
                 from libcld3/feature_extractor.h:45,
                 from libcld3/embedding_feature_extractor.h:23,
                 from libcld3/nnet_language_identifier.h:22,
                 from wrapper.cpp:2:
/usr/include/google/protobuf/arenastring.h:220:15: note: candidate: ‘void google::protobuf::internal::ArenaStringPtr::ClearToEmpty(const string*, google::protobuf::Arena*)’
  220 |   inline void ClearToEmpty(const ::std::string* default_value,
      |               ^~~~~~~~~~~~
/usr/include/google/protobuf/arenastring.h:220:15: note:   candidate expects 2 arguments, 0 provided
In file included from libcld3/task_context.h:23,
                 from libcld3/feature_extractor.h:49,
                 from libcld3/embedding_feature_extractor.h:23,
                 from libcld3/nnet_language_identifier.h:22,
                 from wrapper.cpp:2:
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskOutput::_internal_set_file_base(const string&)’:
./cld_3/protos/task_spec.pb.h:2018:69: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 2018 |   file_base_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, value, GetArena());
      |                                                                     ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskOutput::set_file_base(std::string&&)’:
./cld_3/protos/task_spec.pb.h:2023:56: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 2023 |     ::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::move(value), GetArena());
      |                                                        ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskOutput::set_file_base(const char*)’:
./cld_3/protos/task_spec.pb.h:2029:69: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 2029 |   file_base_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::string(value), GetArena());
      |                                                                     ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskOutput::set_file_base(const char*, size_t)’:
./cld_3/protos/task_spec.pb.h:2035:69: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 2035 |   file_base_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::string(
      |                                                                     ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘std::string* chrome_lang_id::TaskOutput::_internal_mutable_file_base()’:
./cld_3/protos/task_spec.pb.h:2041:80: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 2041 |   return file_base_.Mutable(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, GetArena());
      |                                                                                ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskOutput::clear_file_extension()’:
./cld_3/protos/task_spec.pb.h:2071:32: error: no matching function for call to ‘google::protobuf::internal::ArenaStringPtr::ClearToEmpty()’
 2071 |   file_extension_.ClearToEmpty();
      |                                ^
In file included from ./cld_3/protos/feature_extractor.pb.h:25,
                 from libcld3/feature_extractor.h:45,
                 from libcld3/embedding_feature_extractor.h:23,
                 from libcld3/nnet_language_identifier.h:22,
                 from wrapper.cpp:2:
/usr/include/google/protobuf/arenastring.h:220:15: note: candidate: ‘void google::protobuf::internal::ArenaStringPtr::ClearToEmpty(const string*, google::protobuf::Arena*)’
  220 |   inline void ClearToEmpty(const ::std::string* default_value,
      |               ^~~~~~~~~~~~
/usr/include/google/protobuf/arenastring.h:220:15: note:   candidate expects 2 arguments, 0 provided
In file included from libcld3/task_context.h:23,
                 from libcld3/feature_extractor.h:49,
                 from libcld3/embedding_feature_extractor.h:23,
                 from libcld3/nnet_language_identifier.h:22,
                 from wrapper.cpp:2:
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskOutput::_internal_set_file_extension(const string&)’:
./cld_3/protos/task_spec.pb.h:2091:74: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 2091 |   file_extension_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, value, GetArena());
      |                                                                          ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskOutput::set_file_extension(std::string&&)’:
./cld_3/protos/task_spec.pb.h:2096:56: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 2096 |     ::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::move(value), GetArena());
      |                                                        ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskOutput::set_file_extension(const char*)’:
./cld_3/protos/task_spec.pb.h:2102:74: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 2102 |   file_extension_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::string(value), GetArena());
      |                                                                          ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskOutput::set_file_extension(const char*, size_t)’:
./cld_3/protos/task_spec.pb.h:2108:74: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 2108 |   file_extension_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::string(
      |                                                                          ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘std::string* chrome_lang_id::TaskOutput::_internal_mutable_file_extension()’:
./cld_3/protos/task_spec.pb.h:2114:85: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 2114 |   return file_extension_.Mutable(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, GetArena());
      |                                                                                     ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskSpec_Parameter::clear_name()’:
./cld_3/protos/task_spec.pb.h:2148:22: error: no matching function for call to ‘google::protobuf::internal::ArenaStringPtr::ClearToEmpty()’
 2148 |   name_.ClearToEmpty();
      |                      ^
In file included from ./cld_3/protos/feature_extractor.pb.h:25,
                 from libcld3/feature_extractor.h:45,
                 from libcld3/embedding_feature_extractor.h:23,
                 from libcld3/nnet_language_identifier.h:22,
                 from wrapper.cpp:2:
/usr/include/google/protobuf/arenastring.h:220:15: note: candidate: ‘void google::protobuf::internal::ArenaStringPtr::ClearToEmpty(const string*, google::protobuf::Arena*)’
  220 |   inline void ClearToEmpty(const ::std::string* default_value,
      |               ^~~~~~~~~~~~
/usr/include/google/protobuf/arenastring.h:220:15: note:   candidate expects 2 arguments, 0 provided
In file included from libcld3/task_context.h:23,
                 from libcld3/feature_extractor.h:49,
                 from libcld3/embedding_feature_extractor.h:23,
                 from libcld3/nnet_language_identifier.h:22,
                 from wrapper.cpp:2:
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskSpec_Parameter::_internal_set_name(const string&)’:
./cld_3/protos/task_spec.pb.h:2168:64: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 2168 |   name_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, value, GetArena());
      |                                                                ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskSpec_Parameter::set_name(std::string&&)’:
./cld_3/protos/task_spec.pb.h:2173:56: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 2173 |     ::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::move(value), GetArena());
      |                                                        ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskSpec_Parameter::set_name(const char*)’:
./cld_3/protos/task_spec.pb.h:2179:64: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 2179 |   name_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::string(value), GetArena());
      |                                                                ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskSpec_Parameter::set_name(const char*, size_t)’:
./cld_3/protos/task_spec.pb.h:2185:64: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 2185 |   name_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::string(
      |                                                                ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘std::string* chrome_lang_id::TaskSpec_Parameter::_internal_mutable_name()’:
./cld_3/protos/task_spec.pb.h:2191:75: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 2191 |   return name_.Mutable(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, GetArena());
      |                                                                           ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskSpec_Parameter::clear_value()’:
./cld_3/protos/task_spec.pb.h:2221:23: error: no matching function for call to ‘google::protobuf::internal::ArenaStringPtr::ClearToEmpty()’
 2221 |   value_.ClearToEmpty();
      |                       ^
In file included from ./cld_3/protos/feature_extractor.pb.h:25,
                 from libcld3/feature_extractor.h:45,
                 from libcld3/embedding_feature_extractor.h:23,
                 from libcld3/nnet_language_identifier.h:22,
                 from wrapper.cpp:2:
/usr/include/google/protobuf/arenastring.h:220:15: note: candidate: ‘void google::protobuf::internal::ArenaStringPtr::ClearToEmpty(const string*, google::protobuf::Arena*)’
  220 |   inline void ClearToEmpty(const ::std::string* default_value,
      |               ^~~~~~~~~~~~
/usr/include/google/protobuf/arenastring.h:220:15: note:   candidate expects 2 arguments, 0 provided
In file included from libcld3/task_context.h:23,
                 from libcld3/feature_extractor.h:49,
                 from libcld3/embedding_feature_extractor.h:23,
                 from libcld3/nnet_language_identifier.h:22,
                 from wrapper.cpp:2:
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskSpec_Parameter::_internal_set_value(const string&)’:
./cld_3/protos/task_spec.pb.h:2241:65: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 2241 |   value_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, value, GetArena());
      |                                                                 ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskSpec_Parameter::set_value(std::string&&)’:
./cld_3/protos/task_spec.pb.h:2246:56: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 2246 |     ::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::move(value), GetArena());
      |                                                        ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskSpec_Parameter::set_value(const char*)’:
./cld_3/protos/task_spec.pb.h:2252:65: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 2252 |   value_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::string(value), GetArena());
      |                                                                 ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskSpec_Parameter::set_value(const char*, size_t)’:
./cld_3/protos/task_spec.pb.h:2258:65: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 2258 |   value_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::string(
      |                                                                 ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘std::string* chrome_lang_id::TaskSpec_Parameter::_internal_mutable_value()’:
./cld_3/protos/task_spec.pb.h:2264:76: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 2264 |   return value_.Mutable(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, GetArena());
      |                                                                            ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskSpec::clear_task_name()’:
./cld_3/protos/task_spec.pb.h:2298:27: error: no matching function for call to ‘google::protobuf::internal::ArenaStringPtr::ClearToEmpty()’
 2298 |   task_name_.ClearToEmpty();
      |                           ^
In file included from ./cld_3/protos/feature_extractor.pb.h:25,
                 from libcld3/feature_extractor.h:45,
                 from libcld3/embedding_feature_extractor.h:23,
                 from libcld3/nnet_language_identifier.h:22,
                 from wrapper.cpp:2:
/usr/include/google/protobuf/arenastring.h:220:15: note: candidate: ‘void google::protobuf::internal::ArenaStringPtr::ClearToEmpty(const string*, google::protobuf::Arena*)’
  220 |   inline void ClearToEmpty(const ::std::string* default_value,
      |               ^~~~~~~~~~~~
/usr/include/google/protobuf/arenastring.h:220:15: note:   candidate expects 2 arguments, 0 provided
In file included from libcld3/task_context.h:23,
                 from libcld3/feature_extractor.h:49,
                 from libcld3/embedding_feature_extractor.h:23,
                 from libcld3/nnet_language_identifier.h:22,
                 from wrapper.cpp:2:
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskSpec::_internal_set_task_name(const string&)’:
./cld_3/protos/task_spec.pb.h:2318:69: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 2318 |   task_name_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, value, GetArena());
      |                                                                     ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskSpec::set_task_name(std::string&&)’:
./cld_3/protos/task_spec.pb.h:2323:56: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 2323 |     ::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::move(value), GetArena());
      |                                                        ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskSpec::set_task_name(const char*)’:
./cld_3/protos/task_spec.pb.h:2329:69: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 2329 |   task_name_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::string(value), GetArena());
      |                                                                     ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskSpec::set_task_name(const char*, size_t)’:
./cld_3/protos/task_spec.pb.h:2335:69: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 2335 |   task_name_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::string(
      |                                                                     ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘std::string* chrome_lang_id::TaskSpec::_internal_mutable_task_name()’:
./cld_3/protos/task_spec.pb.h:2341:80: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 2341 |   return task_name_.Mutable(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, GetArena());
      |                                                                                ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskSpec::clear_task_type()’:
./cld_3/protos/task_spec.pb.h:2371:27: error: no matching function for call to ‘google::protobuf::internal::ArenaStringPtr::ClearToEmpty()’
 2371 |   task_type_.ClearToEmpty();
      |                           ^
In file included from ./cld_3/protos/feature_extractor.pb.h:25,
                 from libcld3/feature_extractor.h:45,
                 from libcld3/embedding_feature_extractor.h:23,
                 from libcld3/nnet_language_identifier.h:22,
                 from wrapper.cpp:2:
/usr/include/google/protobuf/arenastring.h:220:15: note: candidate: ‘void google::protobuf::internal::ArenaStringPtr::ClearToEmpty(const string*, google::protobuf::Arena*)’
  220 |   inline void ClearToEmpty(const ::std::string* default_value,
      |               ^~~~~~~~~~~~
/usr/include/google/protobuf/arenastring.h:220:15: note:   candidate expects 2 arguments, 0 provided
In file included from libcld3/task_context.h:23,
                 from libcld3/feature_extractor.h:49,
                 from libcld3/embedding_feature_extractor.h:23,
                 from libcld3/nnet_language_identifier.h:22,
                 from wrapper.cpp:2:
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskSpec::_internal_set_task_type(const string&)’:
./cld_3/protos/task_spec.pb.h:2391:69: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 2391 |   task_type_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, value, GetArena());
      |                                                                     ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskSpec::set_task_type(std::string&&)’:
./cld_3/protos/task_spec.pb.h:2396:56: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 2396 |     ::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::move(value), GetArena());
      |                                                        ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskSpec::set_task_type(const char*)’:
./cld_3/protos/task_spec.pb.h:2402:69: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 2402 |   task_type_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::string(value), GetArena());
      |                                                                     ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘void chrome_lang_id::TaskSpec::set_task_type(const char*, size_t)’:
./cld_3/protos/task_spec.pb.h:2408:69: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 2408 |   task_type_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::string(
      |                                                                     ^~~~~~~~~~~~
./cld_3/protos/task_spec.pb.h: In member function ‘std::string* chrome_lang_id::TaskSpec::_internal_mutable_task_type()’:
./cld_3/protos/task_spec.pb.h:2414:80: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 2414 |   return task_type_.Mutable(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, GetArena());
      |                                                                                ^~~~~~~~~~~~
In file included from libcld3/language_identifier_features.h:24,
                 from libcld3/nnet_language_identifier.h:25,
                 from wrapper.cpp:2:
./cld_3/protos/sentence.pb.h: At global scope:
./cld_3/protos/sentence.pb.h:46:51: error: ‘AuxiliaryParseTableField’ in namespace ‘google::protobuf::internal’ does not name a type; did you mean ‘AuxillaryParseTableField’?
   46 |   static const ::PROTOBUF_NAMESPACE_ID::internal::AuxiliaryParseTableField aux[]
      |                                                   ^~~~~~~~~~~~~~~~~~~~~~~~
      |                                                   AuxillaryParseTableField
./cld_3/protos/sentence.pb.h:88:30: error: ‘ConstStringParam’ is not a member of ‘google::protobuf’
   88 |     ::PROTOBUF_NAMESPACE_ID::ConstStringParam name, Token_BreakLevel* value);
      |                              ^~~~~~~~~~~~~~~~
./cld_3/protos/sentence.pb.h:88:69: error: expected primary-expression before ‘*’ token
   88 |     ::PROTOBUF_NAMESPACE_ID::ConstStringParam name, Token_BreakLevel* value);
      |                                                                     ^
./cld_3/protos/sentence.pb.h:88:71: error: ‘value’ was not declared in this scope
   88 |     ::PROTOBUF_NAMESPACE_ID::ConstStringParam name, Token_BreakLevel* value);
      |                                                                       ^~~~~
./cld_3/protos/sentence.pb.h:88:76: error: expression list treated as compound expression in initializer [-fpermissive]
   88 |     ::PROTOBUF_NAMESPACE_ID::ConstStringParam name, Token_BreakLevel* value);
      |                                                                            ^
./cld_3/protos/sentence.pb.h:402:64: error: ‘google::protobuf::ConstStringParam’ has not been declared
  402 |   static inline bool BreakLevel_Parse(::PROTOBUF_NAMESPACE_ID::ConstStringParam name,
      |                                                                ^~~~~~~~~~~~~~~~
./cld_3/protos/sentence.pb.h: In static member function ‘static bool chrome_lang_id::Token::BreakLevel_Parse(int, chrome_lang_id::Token::BreakLevel*)’:
./cld_3/protos/sentence.pb.h:404:46: error: ‘chrome_lang_id::Token_BreakLevel_Parse’ cannot be used as a function
  404 |     return Token_BreakLevel_Parse(name, value);
      |                                              ^
./cld_3/protos/sentence.pb.h: In member function ‘void chrome_lang_id::Sentence::clear_id()’:
./cld_3/protos/sentence.pb.h:596:20: error: no matching function for call to ‘google::protobuf::internal::ArenaStringPtr::ClearToEmpty()’
  596 |   id_.ClearToEmpty();
      |                    ^
In file included from ./cld_3/protos/feature_extractor.pb.h:25,
                 from libcld3/feature_extractor.h:45,
                 from libcld3/embedding_feature_extractor.h:23,
                 from libcld3/nnet_language_identifier.h:22,
                 from wrapper.cpp:2:
/usr/include/google/protobuf/arenastring.h:220:15: note: candidate: ‘void google::protobuf::internal::ArenaStringPtr::ClearToEmpty(const string*, google::protobuf::Arena*)’
  220 |   inline void ClearToEmpty(const ::std::string* default_value,
      |               ^~~~~~~~~~~~
/usr/include/google/protobuf/arenastring.h:220:15: note:   candidate expects 2 arguments, 0 provided
In file included from libcld3/language_identifier_features.h:24,
                 from libcld3/nnet_language_identifier.h:25,
                 from wrapper.cpp:2:
./cld_3/protos/sentence.pb.h: In member function ‘void chrome_lang_id::Sentence::_internal_set_id(const string&)’:
./cld_3/protos/sentence.pb.h:616:62: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
  616 |   id_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, value, GetArena());
      |                                                              ^~~~~~~~~~~~
./cld_3/protos/sentence.pb.h: In member function ‘void chrome_lang_id::Sentence::set_id(std::string&&)’:
./cld_3/protos/sentence.pb.h:621:56: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
  621 |     ::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::move(value), GetArena());
      |                                                        ^~~~~~~~~~~~
./cld_3/protos/sentence.pb.h: In member function ‘void chrome_lang_id::Sentence::set_id(const char*)’:
./cld_3/protos/sentence.pb.h:627:62: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
  627 |   id_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::string(value), GetArena());
      |                                                              ^~~~~~~~~~~~
./cld_3/protos/sentence.pb.h: In member function ‘void chrome_lang_id::Sentence::set_id(const char*, size_t)’:
./cld_3/protos/sentence.pb.h:633:62: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
  633 |   id_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::string(
      |                                                              ^~~~~~~~~~~~
./cld_3/protos/sentence.pb.h: In member function ‘std::string* chrome_lang_id::Sentence::_internal_mutable_id()’:
./cld_3/protos/sentence.pb.h:639:73: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
  639 |   return id_.Mutable(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, GetArena());
      |                                                                         ^~~~~~~~~~~~
./cld_3/protos/sentence.pb.h: In member function ‘void chrome_lang_id::Sentence::clear_text()’:
./cld_3/protos/sentence.pb.h:669:22: error: no matching function for call to ‘google::protobuf::internal::ArenaStringPtr::ClearToEmpty()’
  669 |   text_.ClearToEmpty();
      |                      ^
In file included from ./cld_3/protos/feature_extractor.pb.h:25,
                 from libcld3/feature_extractor.h:45,
                 from libcld3/embedding_feature_extractor.h:23,
                 from libcld3/nnet_language_identifier.h:22,
                 from wrapper.cpp:2:
/usr/include/google/protobuf/arenastring.h:220:15: note: candidate: ‘void google::protobuf::internal::ArenaStringPtr::ClearToEmpty(const string*, google::protobuf::Arena*)’
  220 |   inline void ClearToEmpty(const ::std::string* default_value,
      |               ^~~~~~~~~~~~
/usr/include/google/protobuf/arenastring.h:220:15: note:   candidate expects 2 arguments, 0 provided
In file included from libcld3/language_identifier_features.h:24,
                 from libcld3/nnet_language_identifier.h:25,
                 from wrapper.cpp:2:
./cld_3/protos/sentence.pb.h: In member function ‘void chrome_lang_id::Sentence::_internal_set_text(const string&)’:
./cld_3/protos/sentence.pb.h:689:64: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
  689 |   text_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, value, GetArena());
      |                                                                ^~~~~~~~~~~~
./cld_3/protos/sentence.pb.h: In member function ‘void chrome_lang_id::Sentence::set_text(std::string&&)’:
./cld_3/protos/sentence.pb.h:694:56: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
  694 |     ::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::move(value), GetArena());
      |                                                        ^~~~~~~~~~~~
./cld_3/protos/sentence.pb.h: In member function ‘void chrome_lang_id::Sentence::set_text(const char*)’:
./cld_3/protos/sentence.pb.h:700:64: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
  700 |   text_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::string(value), GetArena());
      |                                                                ^~~~~~~~~~~~
./cld_3/protos/sentence.pb.h: In member function ‘void chrome_lang_id::Sentence::set_text(const char*, size_t)’:
./cld_3/protos/sentence.pb.h:706:64: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
  706 |   text_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::string(
      |                                                                ^~~~~~~~~~~~
./cld_3/protos/sentence.pb.h: In member function ‘std::string* chrome_lang_id::Sentence::_internal_mutable_text()’:
./cld_3/protos/sentence.pb.h:712:75: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
  712 |   return text_.Mutable(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, GetArena());
      |                                                                           ^~~~~~~~~~~~
./cld_3/protos/sentence.pb.h: In member function ‘void chrome_lang_id::Token::clear_word()’:
./cld_3/protos/sentence.pb.h:785:22: error: no matching function for call to ‘google::protobuf::internal::ArenaStringPtr::ClearToEmpty()’
  785 |   word_.ClearToEmpty();
      |                      ^
In file included from ./cld_3/protos/feature_extractor.pb.h:25,
                 from libcld3/feature_extractor.h:45,
                 from libcld3/embedding_feature_extractor.h:23,
                 from libcld3/nnet_language_identifier.h:22,
                 from wrapper.cpp:2:
/usr/include/google/protobuf/arenastring.h:220:15: note: candidate: ‘void google::protobuf::internal::ArenaStringPtr::ClearToEmpty(const string*, google::protobuf::Arena*)’
  220 |   inline void ClearToEmpty(const ::std::string* default_value,
      |               ^~~~~~~~~~~~
/usr/include/google/protobuf/arenastring.h:220:15: note:   candidate expects 2 arguments, 0 provided
In file included from libcld3/language_identifier_features.h:24,
                 from libcld3/nnet_language_identifier.h:25,
                 from wrapper.cpp:2:
./cld_3/protos/sentence.pb.h: In member function ‘void chrome_lang_id::Token::_internal_set_word(const string&)’:
./cld_3/protos/sentence.pb.h:805:64: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
  805 |   word_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, value, GetArena());
      |                                                                ^~~~~~~~~~~~
./cld_3/protos/sentence.pb.h: In member function ‘void chrome_lang_id::Token::set_word(std::string&&)’:
./cld_3/protos/sentence.pb.h:810:56: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
  810 |     ::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::move(value), GetArena());
      |                                                        ^~~~~~~~~~~~
./cld_3/protos/sentence.pb.h: In member function ‘void chrome_lang_id::Token::set_word(const char*)’:
./cld_3/protos/sentence.pb.h:816:64: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
  816 |   word_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::string(value), GetArena());
      |                                                                ^~~~~~~~~~~~
./cld_3/protos/sentence.pb.h: In member function ‘void chrome_lang_id::Token::set_word(const char*, size_t)’:
./cld_3/protos/sentence.pb.h:822:64: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
  822 |   word_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::string(
      |                                                                ^~~~~~~~~~~~
./cld_3/protos/sentence.pb.h: In member function ‘std::string* chrome_lang_id::Token::_internal_mutable_word()’:
./cld_3/protos/sentence.pb.h:828:75: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
  828 |   return word_.Mutable(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, GetArena());
      |                                                                           ^~~~~~~~~~~~
./cld_3/protos/sentence.pb.h: In member function ‘void chrome_lang_id::Token::clear_tag()’:
./cld_3/protos/sentence.pb.h:942:21: error: no matching function for call to ‘google::protobuf::internal::ArenaStringPtr::ClearToEmpty()’
  942 |   tag_.ClearToEmpty();
      |                     ^
In file included from ./cld_3/protos/feature_extractor.pb.h:25,
                 from libcld3/feature_extractor.h:45,
                 from libcld3/embedding_feature_extractor.h:23,
                 from libcld3/nnet_language_identifier.h:22,
                 from wrapper.cpp:2:
/usr/include/google/protobuf/arenastring.h:220:15: note: candidate: ‘void google::protobuf::internal::ArenaStringPtr::ClearToEmpty(const string*, google::protobuf::Arena*)’
  220 |   inline void ClearToEmpty(const ::std::string* default_value,
      |               ^~~~~~~~~~~~
/usr/include/google/protobuf/arenastring.h:220:15: note:   candidate expects 2 arguments, 0 provided
In file included from libcld3/language_identifier_features.h:24,
                 from libcld3/nnet_language_identifier.h:25,
                 from wrapper.cpp:2:
./cld_3/protos/sentence.pb.h: In member function ‘void chrome_lang_id::Token::_internal_set_tag(const string&)’:
./cld_3/protos/sentence.pb.h:962:63: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
  962 |   tag_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, value, GetArena());
      |                                                               ^~~~~~~~~~~~
./cld_3/protos/sentence.pb.h: In member function ‘void chrome_lang_id::Token::set_tag(std::string&&)’:
./cld_3/protos/sentence.pb.h:967:56: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
  967 |     ::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::move(value), GetArena());
      |                                                        ^~~~~~~~~~~~
./cld_3/protos/sentence.pb.h: In member function ‘void chrome_lang_id::Token::set_tag(const char*)’:
./cld_3/protos/sentence.pb.h:973:63: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
  973 |   tag_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::string(value), GetArena());
      |                                                               ^~~~~~~~~~~~
./cld_3/protos/sentence.pb.h: In member function ‘void chrome_lang_id::Token::set_tag(const char*, size_t)’:
./cld_3/protos/sentence.pb.h:979:63: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
  979 |   tag_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::string(
      |                                                               ^~~~~~~~~~~~
./cld_3/protos/sentence.pb.h: In member function ‘std::string* chrome_lang_id::Token::_internal_mutable_tag()’:
./cld_3/protos/sentence.pb.h:985:74: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
  985 |   return tag_.Mutable(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, GetArena());
      |                                                                          ^~~~~~~~~~~~
./cld_3/protos/sentence.pb.h: In member function ‘void chrome_lang_id::Token::clear_category()’:
./cld_3/protos/sentence.pb.h:1015:26: error: no matching function for call to ‘google::protobuf::internal::ArenaStringPtr::ClearToEmpty()’
 1015 |   category_.ClearToEmpty();
      |                          ^
In file included from ./cld_3/protos/feature_extractor.pb.h:25,
                 from libcld3/feature_extractor.h:45,
                 from libcld3/embedding_feature_extractor.h:23,
                 from libcld3/nnet_language_identifier.h:22,
                 from wrapper.cpp:2:
/usr/include/google/protobuf/arenastring.h:220:15: note: candidate: ‘void google::protobuf::internal::ArenaStringPtr::ClearToEmpty(const string*, google::protobuf::Arena*)’
  220 |   inline void ClearToEmpty(const ::std::string* default_value,
      |               ^~~~~~~~~~~~
/usr/include/google/protobuf/arenastring.h:220:15: note:   candidate expects 2 arguments, 0 provided
In file included from libcld3/language_identifier_features.h:24,
                 from libcld3/nnet_language_identifier.h:25,
                 from wrapper.cpp:2:
./cld_3/protos/sentence.pb.h: In member function ‘void chrome_lang_id::Token::_internal_set_category(const string&)’:
./cld_3/protos/sentence.pb.h:1035:68: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 1035 |   category_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, value, GetArena());
      |                                                                    ^~~~~~~~~~~~
./cld_3/protos/sentence.pb.h: In member function ‘void chrome_lang_id::Token::set_category(std::string&&)’:
./cld_3/protos/sentence.pb.h:1040:56: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 1040 |     ::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::move(value), GetArena());
      |                                                        ^~~~~~~~~~~~
./cld_3/protos/sentence.pb.h: In member function ‘void chrome_lang_id::Token::set_category(const char*)’:
./cld_3/protos/sentence.pb.h:1046:68: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 1046 |   category_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::string(value), GetArena());
      |                                                                    ^~~~~~~~~~~~
./cld_3/protos/sentence.pb.h: In member function ‘void chrome_lang_id::Token::set_category(const char*, size_t)’:
./cld_3/protos/sentence.pb.h:1052:68: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 1052 |   category_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::string(
      |                                                                    ^~~~~~~~~~~~
./cld_3/protos/sentence.pb.h: In member function ‘std::string* chrome_lang_id::Token::_internal_mutable_category()’:
./cld_3/protos/sentence.pb.h:1058:79: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 1058 |   return category_.Mutable(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, GetArena());
      |                                                                               ^~~~~~~~~~~~
./cld_3/protos/sentence.pb.h: In member function ‘void chrome_lang_id::Token::clear_label()’:
./cld_3/protos/sentence.pb.h:1088:23: error: no matching function for call to ‘google::protobuf::internal::ArenaStringPtr::ClearToEmpty()’
 1088 |   label_.ClearToEmpty();
      |                       ^
In file included from ./cld_3/protos/feature_extractor.pb.h:25,
                 from libcld3/feature_extractor.h:45,
                 from libcld3/embedding_feature_extractor.h:23,
                 from libcld3/nnet_language_identifier.h:22,
                 from wrapper.cpp:2:
/usr/include/google/protobuf/arenastring.h:220:15: note: candidate: ‘void google::protobuf::internal::ArenaStringPtr::ClearToEmpty(const string*, google::protobuf::Arena*)’
  220 |   inline void ClearToEmpty(const ::std::string* default_value,
      |               ^~~~~~~~~~~~
/usr/include/google/protobuf/arenastring.h:220:15: note:   candidate expects 2 arguments, 0 provided
In file included from libcld3/language_identifier_features.h:24,
                 from libcld3/nnet_language_identifier.h:25,
                 from wrapper.cpp:2:
./cld_3/protos/sentence.pb.h: In member function ‘void chrome_lang_id::Token::_internal_set_label(const string&)’:
./cld_3/protos/sentence.pb.h:1108:65: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 1108 |   label_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, value, GetArena());
      |                                                                 ^~~~~~~~~~~~
./cld_3/protos/sentence.pb.h: In member function ‘void chrome_lang_id::Token::set_label(std::string&&)’:
./cld_3/protos/sentence.pb.h:1113:56: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 1113 |     ::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::move(value), GetArena());
      |                                                        ^~~~~~~~~~~~
./cld_3/protos/sentence.pb.h: In member function ‘void chrome_lang_id::Token::set_label(const char*)’:
./cld_3/protos/sentence.pb.h:1119:65: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 1119 |   label_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::string(value), GetArena());
      |                                                                 ^~~~~~~~~~~~
./cld_3/protos/sentence.pb.h: In member function ‘void chrome_lang_id::Token::set_label(const char*, size_t)’:
./cld_3/protos/sentence.pb.h:1125:65: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 1125 |   label_.Set(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, ::std::string(
      |                                                                 ^~~~~~~~~~~~
./cld_3/protos/sentence.pb.h: In member function ‘std::string* chrome_lang_id::Token::_internal_mutable_label()’:
./cld_3/protos/sentence.pb.h:1131:76: error: ‘EmptyDefault’ is not a member of ‘google::protobuf::internal::ArenaStringPtr’
 1131 |   return label_.Mutable(::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::EmptyDefault{}, GetArena());
      |                                                                            ^~~~~~~~~~~~
make: *** [/usr/lib/R/etc/Makeconf:177: wrapper.o] Error 1
ERROR: compilation failed for package ‘cld3’
* removing ‘/home/ben/R/x86_64-pc-linux-gnu-library/4.1/cld3’

The downloaded source packages are in
	‘/tmp/RtmpdQiQ4l/downloaded_packages’


✔ Package 'cld3' successfully installed.
Warning message:
In utils::install.packages("cld3", repos = "https://cloud.r-project.org") :
  installation of package ‘cld3’ had non-zero exit status

@BenWiseman
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Oh, weird, installing in terminal (not Rstudio) it worked.

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@jeroen @BenWiseman