树莓派5里使用protobuf
由于现在protobuf越来越复杂了，自己去编译，还是比较麻烦。
比如最新的V28版本，就会要求使用cmake或者bazel来编译了。
如果不要求使用最新的版本，直接使用系统里带的版本也是可以的。
可以进行如下操作：
sudo apt install protobuf-compiler libprotobuf-dev -y这样就安装成功所有开发相关的库文件了，这里主要是针对C++的。
protoc --version运行上面的命令，就可以输出对应的版本：
可以看到我这里的系统带的是3.21.12的版本，对于我来说，这样是满足了需求了。不去折腾最新的版本。
syntax = "proto3";message Person
{string name = 1;int32 age = 18;
}上面的文件，就可以使用命令行进行编译：
protoc --cpp_out=./ Test.proto输出两个文件：
然后就可以在树莓派里使用它来编译了。
// Generated by the protocol buffer compiler. DO NOT EDIT!
// source: Test.proto#ifndef GOOGLE_PROTOBUF_INCLUDED_Test_2eproto
#define GOOGLE_PROTOBUF_INCLUDED_Test_2eproto#include <limits>
#include <string>#include <google/protobuf/port_def.inc>
#if PROTOBUF_VERSION < 3021000
#error This file was generated by a newer version of protoc which is
#error incompatible with your Protocol Buffer headers. Please update
#error your headers.
#endif
#if 3021012 < PROTOBUF_MIN_PROTOC_VERSION
#error This file was generated by an older version of protoc which is
#error incompatible with your Protocol Buffer headers. Please
#error regenerate this file with a newer version of protoc.
#endif#include <google/protobuf/port_undef.inc>
#include <google/protobuf/io/coded_stream.h>
#include <google/protobuf/arena.h>
#include <google/protobuf/arenastring.h>
#include <google/protobuf/generated_message_util.h>
#include <google/protobuf/metadata_lite.h>
#include <google/protobuf/generated_message_reflection.h>
#include <google/protobuf/message.h>
#include <google/protobuf/repeated_field.h> // IWYU pragma: export
#include <google/protobuf/extension_set.h> // IWYU pragma: export
#include <google/protobuf/unknown_field_set.h>
// @@protoc_insertion_point(includes)
#include <google/protobuf/port_def.inc>
#define PROTOBUF_INTERNAL_EXPORT_Test_2eproto
PROTOBUF_NAMESPACE_OPEN
namespace internal {
class AnyMetadata;
} // namespace internal
PROTOBUF_NAMESPACE_CLOSE// Internal implementation detail -- do not use these members.
struct TableStruct_Test_2eproto {static const uint32_t offsets[];
};
extern const ::PROTOBUF_NAMESPACE_ID::internal::DescriptorTable descriptor_table_Test_2eproto;
class Person;
struct PersonDefaultTypeInternal;
extern PersonDefaultTypeInternal _Person_default_instance_;
PROTOBUF_NAMESPACE_OPEN
template<> ::Person* Arena::CreateMaybeMessage<::Person>(Arena*);
PROTOBUF_NAMESPACE_CLOSE// ===================================================================class Person final :public ::PROTOBUF_NAMESPACE_ID::Message /* @@protoc_insertion_point(class_definition:Person) */ {public:inline Person() : Person(nullptr) {}~Person() override;explicit PROTOBUF_CONSTEXPR Person(::PROTOBUF_NAMESPACE_ID::internal::ConstantInitialized);Person(const Person& from);Person(Person&& from) noexcept: Person() {*this = ::std::move(from);}inline Person& operator=(const Person& from) {CopyFrom(from);return *this;}inline Person& operator=(Person&& from) noexcept {if (this == &from) return *this;if (GetOwningArena() == from.GetOwningArena()#ifdef PROTOBUF_FORCE_COPY_IN_MOVE&& GetOwningArena() != nullptr#endif // !PROTOBUF_FORCE_COPY_IN_MOVE) {InternalSwap(&from);} else {CopyFrom(from);}return *this;}static const ::PROTOBUF_NAMESPACE_ID::Descriptor* descriptor() {return GetDescriptor();}static const ::PROTOBUF_NAMESPACE_ID::Descriptor* GetDescriptor() {return default_instance().GetMetadata().descriptor;}static const ::PROTOBUF_NAMESPACE_ID::Reflection* GetReflection() {return default_instance().GetMetadata().reflection;}static const Person& default_instance() {return *internal_default_instance();}static inline const Person* internal_default_instance() {return reinterpret_cast<const Person*>(&_Person_default_instance_);}static constexpr int kIndexInFileMessages =0;friend void swap(Person& a, Person& b) {a.Swap(&b);}inline void Swap(Person* other) {if (other == this) return;#ifdef PROTOBUF_FORCE_COPY_IN_SWAPif (GetOwningArena() != nullptr &&GetOwningArena() == other->GetOwningArena()) {#else // PROTOBUF_FORCE_COPY_IN_SWAPif (GetOwningArena() == other->GetOwningArena()) {#endif // !PROTOBUF_FORCE_COPY_IN_SWAPInternalSwap(other);} else {::PROTOBUF_NAMESPACE_ID::internal::GenericSwap(this, other);}}void UnsafeArenaSwap(Person* other) {if (other == this) return;GOOGLE_DCHECK(GetOwningArena() == other->GetOwningArena());InternalSwap(other);}// implements Message ----------------------------------------------Person* New(::PROTOBUF_NAMESPACE_ID::Arena* arena = nullptr) const final {return CreateMaybeMessage<Person>(arena);}using ::PROTOBUF_NAMESPACE_ID::Message::CopyFrom;void CopyFrom(const Person& from);using ::PROTOBUF_NAMESPACE_ID::Message::MergeFrom;void MergeFrom( const Person& from) {Person::MergeImpl(*this, from);}private:static void MergeImpl(::PROTOBUF_NAMESPACE_ID::Message& to_msg, const ::PROTOBUF_NAMESPACE_ID::Message& from_msg);public:PROTOBUF_ATTRIBUTE_REINITIALIZES void Clear() final;bool IsInitialized() const final;size_t ByteSizeLong() const final;const char* _InternalParse(const char* ptr, ::PROTOBUF_NAMESPACE_ID::internal::ParseContext* ctx) final;uint8_t* _InternalSerialize(uint8_t* target, ::PROTOBUF_NAMESPACE_ID::io::EpsCopyOutputStream* stream) const final;int GetCachedSize() const final { return _impl_._cached_size_.Get(); }private:void SharedCtor(::PROTOBUF_NAMESPACE_ID::Arena* arena, bool is_message_owned);void SharedDtor();void SetCachedSize(int size) const final;void InternalSwap(Person* other);private:friend class ::PROTOBUF_NAMESPACE_ID::internal::AnyMetadata;static ::PROTOBUF_NAMESPACE_ID::StringPiece FullMessageName() {return "Person";}protected:explicit Person(::PROTOBUF_NAMESPACE_ID::Arena* arena,bool is_message_owned = false);public:static const ClassData _class_data_;const ::PROTOBUF_NAMESPACE_ID::Message::ClassData*GetClassData() const final;::PROTOBUF_NAMESPACE_ID::Metadata GetMetadata() const final;// nested types ----------------------------------------------------// accessors -------------------------------------------------------enum : int {kNameFieldNumber = 1,kAgeFieldNumber = 18,};// string name = 1;void clear_name();const std::string& name() const;template <typename ArgT0 = const std::string&, typename... ArgT>void set_name(ArgT0&& arg0, ArgT... args);std::string* mutable_name();PROTOBUF_NODISCARD std::string* release_name();void set_allocated_name(std::string* name);private:const std::string& _internal_name() const;inline PROTOBUF_ALWAYS_INLINE void _internal_set_name(const std::string& value);std::string* _internal_mutable_name();public:// int32 age = 18;void clear_age();int32_t age() const;void set_age(int32_t value);private:int32_t _internal_age() const;void _internal_set_age(int32_t value);public:// @@protoc_insertion_point(class_scope:Person)private:class _Internal;template <typename T> friend class ::PROTOBUF_NAMESPACE_ID::Arena::InternalHelper;typedef void InternalArenaConstructable_;typedef void DestructorSkippable_;struct Impl_ {::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr name_;int32_t age_;mutable ::PROTOBUF_NAMESPACE_ID::internal::CachedSize _cached_size_;};union { Impl_ _impl_; };friend struct ::TableStruct_Test_2eproto;
};
// ===================================================================// ===================================================================#ifdef __GNUC__#pragma GCC diagnostic push#pragma GCC diagnostic ignored "-Wstrict-aliasing"
#endif // __GNUC__
// Person// string name = 1;
inline void Person::clear_name() {_impl_.name_.ClearToEmpty();
}
inline const std::string& Person::name() const {// @@protoc_insertion_point(field_get:Person.name)return _internal_name();
}
template <typename ArgT0, typename... ArgT>
inline PROTOBUF_ALWAYS_INLINE
void Person::set_name(ArgT0&& arg0, ArgT... args) {_impl_.name_.Set(static_cast<ArgT0 &&>(arg0), args..., GetArenaForAllocation());// @@protoc_insertion_point(field_set:Person.name)
}
inline std::string* Person::mutable_name() {std::string* _s = _internal_mutable_name();// @@protoc_insertion_point(field_mutable:Person.name)return _s;
}
inline const std::string& Person::_internal_name() const {return _impl_.name_.Get();
}
inline void Person::_internal_set_name(const std::string& value) {_impl_.name_.Set(value, GetArenaForAllocation());
}
inline std::string* Person::_internal_mutable_name() {return _impl_.name_.Mutable(GetArenaForAllocation());
}
inline std::string* Person::release_name() {// @@protoc_insertion_point(field_release:Person.name)return _impl_.name_.Release();
}
inline void Person::set_allocated_name(std::string* name) {if (name != nullptr) {} else {}_impl_.name_.SetAllocated(name, GetArenaForAllocation());
#ifdef PROTOBUF_FORCE_COPY_DEFAULT_STRINGif (_impl_.name_.IsDefault()) {_impl_.name_.Set("", GetArenaForAllocation());}
#endif // PROTOBUF_FORCE_COPY_DEFAULT_STRING// @@protoc_insertion_point(field_set_allocated:Person.name)
}// int32 age = 18;
inline void Person::clear_age() {_impl_.age_ = 0;
}
inline int32_t Person::_internal_age() const {return _impl_.age_;
}
inline int32_t Person::age() const {// @@protoc_insertion_point(field_get:Person.age)return _internal_age();
}
inline void Person::_internal_set_age(int32_t value) {_impl_.age_ = value;
}
inline void Person::set_age(int32_t value) {_internal_set_age(value);// @@protoc_insertion_point(field_set:Person.age)
}#ifdef __GNUC__#pragma GCC diagnostic pop
#endif // __GNUC__// @@protoc_insertion_point(namespace_scope)// @@protoc_insertion_point(global_scope)#include <google/protobuf/port_undef.inc>
#endif // GOOGLE_PROTOBUF_INCLUDED_GOOGLE_PROTOBUF_INCLUDED_Test_2eproto
cc文件：
// Generated by the protocol buffer compiler. DO NOT EDIT!
// source: Test.proto#include "Test.pb.h"#include <algorithm>#include <google/protobuf/io/coded_stream.h>
#include <google/protobuf/extension_set.h>
#include <google/protobuf/wire_format_lite.h>
#include <google/protobuf/descriptor.h>
#include <google/protobuf/generated_message_reflection.h>
#include <google/protobuf/reflection_ops.h>
#include <google/protobuf/wire_format.h>
// @@protoc_insertion_point(includes)
#include <google/protobuf/port_def.inc>PROTOBUF_PRAGMA_INIT_SEGnamespace _pb = ::PROTOBUF_NAMESPACE_ID;
namespace _pbi = _pb::internal;PROTOBUF_CONSTEXPR Person::Person(::_pbi::ConstantInitialized): _impl_{/*decltype(_impl_.name_)*/{&::_pbi::fixed_address_empty_string, ::_pbi::ConstantInitialized{}}, /*decltype(_impl_.age_)*/0, /*decltype(_impl_._cached_size_)*/{}} {}
struct PersonDefaultTypeInternal {PROTOBUF_CONSTEXPR PersonDefaultTypeInternal(): _instance(::_pbi::ConstantInitialized{}) {}~PersonDefaultTypeInternal() {}union {Person _instance;};
};
PROTOBUF_ATTRIBUTE_NO_DESTROY PROTOBUF_CONSTINIT PROTOBUF_ATTRIBUTE_INIT_PRIORITY1 PersonDefaultTypeInternal _Person_default_instance_;
static ::_pb::Metadata file_level_metadata_Test_2eproto[1];
static constexpr ::_pb::EnumDescriptor const** file_level_enum_descriptors_Test_2eproto = nullptr;
static constexpr ::_pb::ServiceDescriptor const** file_level_service_descriptors_Test_2eproto = nullptr;const uint32_t TableStruct_Test_2eproto::offsets[] PROTOBUF_SECTION_VARIABLE(protodesc_cold) = {~0u, // no _has_bits_PROTOBUF_FIELD_OFFSET(::Person, _internal_metadata_),~0u, // no _extensions_~0u, // no _oneof_case_~0u, // no _weak_field_map_~0u, // no _inlined_string_donated_PROTOBUF_FIELD_OFFSET(::Person, _impl_.name_),PROTOBUF_FIELD_OFFSET(::Person, _impl_.age_),
};
static const ::_pbi::MigrationSchema schemas[] PROTOBUF_SECTION_VARIABLE(protodesc_cold) = {{ 0, -1, -1, sizeof(::Person)},
};static const ::_pb::Message* const file_default_instances[] = {&::_Person_default_instance_._instance,
};const char descriptor_table_protodef_Test_2eproto[] PROTOBUF_SECTION_VARIABLE(protodesc_cold) ="\n\nTest.proto\"#\n\006Person\022\014\n\004name\030\001 \001(\t\022\013\n\003""age\030\022 \001(\005b\006proto3";
static ::_pbi::once_flag descriptor_table_Test_2eproto_once;
const ::_pbi::DescriptorTable descriptor_table_Test_2eproto = {false, false, 57, descriptor_table_protodef_Test_2eproto,"Test.proto",&descriptor_table_Test_2eproto_once, nullptr, 0, 1,schemas, file_default_instances, TableStruct_Test_2eproto::offsets,file_level_metadata_Test_2eproto, file_level_enum_descriptors_Test_2eproto,file_level_service_descriptors_Test_2eproto,
};
PROTOBUF_ATTRIBUTE_WEAK const ::_pbi::DescriptorTable* descriptor_table_Test_2eproto_getter() {return &descriptor_table_Test_2eproto;
}// Force running AddDescriptors() at dynamic initialization time.
PROTOBUF_ATTRIBUTE_INIT_PRIORITY2 static ::_pbi::AddDescriptorsRunner dynamic_init_dummy_Test_2eproto(&descriptor_table_Test_2eproto);// ===================================================================class Person::_Internal {public:
};Person::Person(::PROTOBUF_NAMESPACE_ID::Arena* arena,bool is_message_owned): ::PROTOBUF_NAMESPACE_ID::Message(arena, is_message_owned) {SharedCtor(arena, is_message_owned);// @@protoc_insertion_point(arena_constructor:Person)
}
Person::Person(const Person& from): ::PROTOBUF_NAMESPACE_ID::Message() {Person* const _this = this; (void)_this;new (&_impl_) Impl_{decltype(_impl_.name_){}, decltype(_impl_.age_){}, /*decltype(_impl_._cached_size_)*/{}};_internal_metadata_.MergeFrom<::PROTOBUF_NAMESPACE_ID::UnknownFieldSet>(from._internal_metadata_);_impl_.name_.InitDefault();#ifdef PROTOBUF_FORCE_COPY_DEFAULT_STRING_impl_.name_.Set("", GetArenaForAllocation());#endif // PROTOBUF_FORCE_COPY_DEFAULT_STRINGif (!from._internal_name().empty()) {_this->_impl_.name_.Set(from._internal_name(), _this->GetArenaForAllocation());}_this->_impl_.age_ = from._impl_.age_;// @@protoc_insertion_point(copy_constructor:Person)
}inline void Person::SharedCtor(::_pb::Arena* arena, bool is_message_owned) {(void)arena;(void)is_message_owned;new (&_impl_) Impl_{decltype(_impl_.name_){}, decltype(_impl_.age_){0}, /*decltype(_impl_._cached_size_)*/{}};_impl_.name_.InitDefault();#ifdef PROTOBUF_FORCE_COPY_DEFAULT_STRING_impl_.name_.Set("", GetArenaForAllocation());#endif // PROTOBUF_FORCE_COPY_DEFAULT_STRING
}Person::~Person() {// @@protoc_insertion_point(destructor:Person)if (auto *arena = _internal_metadata_.DeleteReturnArena<::PROTOBUF_NAMESPACE_ID::UnknownFieldSet>()) {(void)arena;return;}SharedDtor();
}inline void Person::SharedDtor() {GOOGLE_DCHECK(GetArenaForAllocation() == nullptr);_impl_.name_.Destroy();
}void Person::SetCachedSize(int size) const {_impl_._cached_size_.Set(size);
}void Person::Clear() {
// @@protoc_insertion_point(message_clear_start:Person)uint32_t cached_has_bits = 0;// Prevent compiler warnings about cached_has_bits being unused(void) cached_has_bits;_impl_.name_.ClearToEmpty();_impl_.age_ = 0;_internal_metadata_.Clear<::PROTOBUF_NAMESPACE_ID::UnknownFieldSet>();
}const char* Person::_InternalParse(const char* ptr, ::_pbi::ParseContext* ctx) {
#define CHK_(x) if (PROTOBUF_PREDICT_FALSE(!(x))) goto failurewhile (!ctx->Done(&ptr)) {uint32_t tag;ptr = ::_pbi::ReadTag(ptr, &tag);switch (tag >> 3) {// string name = 1;case 1:if (PROTOBUF_PREDICT_TRUE(static_cast<uint8_t>(tag) == 10)) {auto str = _internal_mutable_name();ptr = ::_pbi::InlineGreedyStringParser(str, ptr, ctx);CHK_(ptr);CHK_(::_pbi::VerifyUTF8(str, "Person.name"));} elsegoto handle_unusual;continue;// int32 age = 18;case 18:if (PROTOBUF_PREDICT_TRUE(static_cast<uint8_t>(tag) == 144)) {_impl_.age_ = ::PROTOBUF_NAMESPACE_ID::internal::ReadVarint32(&ptr);CHK_(ptr);} elsegoto handle_unusual;continue;default:goto handle_unusual;} // switchhandle_unusual:if ((tag == 0) || ((tag & 7) == 4)) {CHK_(ptr);ctx->SetLastTag(tag);goto message_done;}ptr = UnknownFieldParse(tag,_internal_metadata_.mutable_unknown_fields<::PROTOBUF_NAMESPACE_ID::UnknownFieldSet>(),ptr, ctx);CHK_(ptr != nullptr);} // while
message_done:return ptr;
failure:ptr = nullptr;goto message_done;
#undef CHK_
}uint8_t* Person::_InternalSerialize(uint8_t* target, ::PROTOBUF_NAMESPACE_ID::io::EpsCopyOutputStream* stream) const {// @@protoc_insertion_point(serialize_to_array_start:Person)uint32_t cached_has_bits = 0;(void) cached_has_bits;// string name = 1;if (!this->_internal_name().empty()) {::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::VerifyUtf8String(this->_internal_name().data(), static_cast<int>(this->_internal_name().length()),::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::SERIALIZE,"Person.name");target = stream->WriteStringMaybeAliased(1, this->_internal_name(), target);}// int32 age = 18;if (this->_internal_age() != 0) {target = stream->EnsureSpace(target);target = ::_pbi::WireFormatLite::WriteInt32ToArray(18, this->_internal_age(), target);}if (PROTOBUF_PREDICT_FALSE(_internal_metadata_.have_unknown_fields())) {target = ::_pbi::WireFormat::InternalSerializeUnknownFieldsToArray(_internal_metadata_.unknown_fields<::PROTOBUF_NAMESPACE_ID::UnknownFieldSet>(::PROTOBUF_NAMESPACE_ID::UnknownFieldSet::default_instance), target, stream);}// @@protoc_insertion_point(serialize_to_array_end:Person)return target;
}size_t Person::ByteSizeLong() const {
// @@protoc_insertion_point(message_byte_size_start:Person)size_t total_size = 0;uint32_t cached_has_bits = 0;// Prevent compiler warnings about cached_has_bits being unused(void) cached_has_bits;// string name = 1;if (!this->_internal_name().empty()) {total_size += 1 +::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::StringSize(this->_internal_name());}// int32 age = 18;if (this->_internal_age() != 0) {total_size += 2 +::_pbi::WireFormatLite::Int32Size(this->_internal_age());}return MaybeComputeUnknownFieldsSize(total_size, &_impl_._cached_size_);
}const ::PROTOBUF_NAMESPACE_ID::Message::ClassData Person::_class_data_ = {::PROTOBUF_NAMESPACE_ID::Message::CopyWithSourceCheck,Person::MergeImpl
};
const ::PROTOBUF_NAMESPACE_ID::Message::ClassData*Person::GetClassData() const { return &_class_data_; }void Person::MergeImpl(::PROTOBUF_NAMESPACE_ID::Message& to_msg, const ::PROTOBUF_NAMESPACE_ID::Message& from_msg) {auto* const _this = static_cast<Person*>(&to_msg);auto& from = static_cast<const Person&>(from_msg);// @@protoc_insertion_point(class_specific_merge_from_start:Person)GOOGLE_DCHECK_NE(&from, _this);uint32_t cached_has_bits = 0;(void) cached_has_bits;if (!from._internal_name().empty()) {_this->_internal_set_name(from._internal_name());}if (from._internal_age() != 0) {_this->_internal_set_age(from._internal_age());}_this->_internal_metadata_.MergeFrom<::PROTOBUF_NAMESPACE_ID::UnknownFieldSet>(from._internal_metadata_);
}void Person::CopyFrom(const Person& from) {
// @@protoc_insertion_point(class_specific_copy_from_start:Person)if (&from == this) return;Clear();MergeFrom(from);
}bool Person::IsInitialized() const {return true;
}void Person::InternalSwap(Person* other) {using std::swap;auto* lhs_arena = GetArenaForAllocation();auto* rhs_arena = other->GetArenaForAllocation();_internal_metadata_.InternalSwap(&other->_internal_metadata_);::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::InternalSwap(&_impl_.name_, lhs_arena,&other->_impl_.name_, rhs_arena);swap(_impl_.age_, other->_impl_.age_);
}::PROTOBUF_NAMESPACE_ID::Metadata Person::GetMetadata() const {return ::_pbi::AssignDescriptors(&descriptor_table_Test_2eproto_getter, &descriptor_table_Test_2eproto_once,file_level_metadata_Test_2eproto[0]);
}// @@protoc_insertion_point(namespace_scope)
PROTOBUF_NAMESPACE_OPEN
template<> PROTOBUF_NOINLINE ::Person*
Arena::CreateMaybeMessage< ::Person >(Arena* arena) {return Arena::CreateMessageInternal< ::Person >(arena);
}
PROTOBUF_NAMESPACE_CLOSE// @@protoc_insertion_point(global_scope)
#include <google/protobuf/port_undef.inc>