官网：https://grpc.io/ 国内需VPN访问
最难的是C语言，C语言最难的是下载完整的包。
先看效果：环境：windows 10,VS2017,git,cmake 就够了。 一、下载完整的包
git clone --recurse-submodules -b v1.41.0 https://github.com/grpc/grpc
如果下载第三方包时中断了，可以用下面继续下载。
git submodule update --init --recursive二、C++编译（其它语言可以直接使用库，不用做这步）
//环境变量新加一个MY_INSTALL_DIR D: 09protobuffgRPCgrpc //建目录手工建也行 cd grpc mkdir cmake cd cmake mkdir build cd build //生成vs工程 cmake -DgRPC_INSTALL=ON -DgRPC_BUILD_TESTS=OFF -DCMAKE_INSTALL_PREFIX=$MY_INSTALL_DIR ../..
用vs2017打开grpc.sln,点生成。
三、示例项目 1.编写proto文件 （grpcexamplesprotoshelloworld.proto） 2.生成C++代码并加入到项目中
//生成javaC++ protobuff类和grpc类 protoc --proto_path=./ --cpp_out=./out helloworld.proto protoc --proto_path=./ --grpc_out=./out --plugin=protoc-gen-grpc="D:testgrpcgrpccmakebuildDebuggrpc_cpp_plugin.exe" helloworld.proto //生成java protoc --proto_path=./ --java_out=./out helloworld.proto
4个文件
3.项目中使用
（1）依赖库
把所有的lib全部搜出来，复制到项目下，并加到 C/C++ 链接器 输入 附加依赖项 里
absl_bad_any_cast_impl.lib;absl_bad_optional_access.lib;absl_bad_variant_access.lib;absl_base.lib;absl_city.lib;absl_civil_time.lib;absl_cord.lib;absl_debugging_internal.lib;absl_demangle_internal.lib;absl_examine_stack.lib;absl_exponential_biased.lib;absl_failure_signal_handler.lib;absl_flags.lib;absl_flags_commandlineflag.lib;absl_flags_commandlineflag_internal.lib;absl_flags_config.lib;absl_flags_internal.lib;absl_flags_marshalling.lib;absl_flags_parse.lib;absl_flags_private_handle_accessor.lib;absl_flags_program_name.lib;absl_flags_reflection.lib;absl_flags_usage.lib;absl_flags_usage_internal.lib;absl_graphcycles_internal.lib;absl_hash.lib;absl_hashtablez_sampler.lib;absl_int128.lib;absl_leak_check.lib;absl_leak_check_disable.lib;absl_log_severity.lib;absl_malloc_internal.lib;absl_periodic_sampler.lib;absl_random_distributions.lib;absl_random_internal_distribution_test_util.lib;absl_random_internal_platform.lib;absl_random_internal_pool_urbg.lib;absl_random_internal_randen.lib;absl_random_internal_randen_hwaes.lib;absl_random_internal_randen_hwaes_impl.lib;absl_random_internal_randen_slow.lib;absl_random_internal_seed_material.lib;absl_random_seed_gen_exception.lib;absl_random_seed_sequences.lib;absl_raw_hash_set.lib;absl_raw_logging_internal.lib;absl_scoped_set_env.lib;absl_spinlock_wait.lib;absl_stacktrace.lib;absl_status.lib;absl_statusor.lib;absl_strerror.lib;absl_strings.lib;absl_strings_internal.lib;absl_str_format_internal.lib;absl_symbolize.lib;absl_synchronization.lib;absl_throw_delegate.lib;absl_time.lib;absl_time_zone.lib;absl_wyhash.lib;address_sorting.lib;cares.lib;crypto.lib;gpr.lib;grpc++.lib;grpc++_alts.lib;grpc++_error_details.lib;grpc++_reflection.lib;grpc++_unsecure.lib;grpc.lib;grpcpp_channelz.lib;grpc_csharp_ext.lib;grpc_plugin_support.lib;grpc_unsecure.lib;libprotobuf-lited.lib;libprotobufd.lib;libprotocd.lib;re2.lib;ssl.lib;testing.lib;upb.lib;zlibd.lib;zlibstaticd.lib
2.include
D:testgrpcgrpcthird_partyabseil-cpp;D:testgrpcgrpcinclude;D:testgrpcgrpcthird_partyprotobufsrc;$(IncludePath)
3.复制zlibd.dll到Debug 是上级目录的Debug
4.编译运行
编译服务端时，请屏蔽掉客户端的main函数代码
编译客户端时，请屏蔽掉服务端的main函数代码
生成exe文件改名，并将zlibd.dll放在一起
完成。
附：其它（以下是弯路，没必要，有错）pushd命令用于更改新目录并(或)压栈,或者把栈里的某个目录推到栈顶。
echo %my_install_dir%
gRPC_ABSL_PROVIDER is "module" but ABSL_ROOT_DIR is wrong
第三方库没有准备好
linux如何安装这些？
$ sudo apt install -y build-essential autoconf libtool pkg-config
全下载再试,成功了。
cmake -DgRPC_INSTALL=ON -DgRPC_BUILD_TESTS=OFF -DCMAKE_INSTALL_PREFIX=$MY_INSTALL_DIR ../..
生成了vs工程。
下载git子模块最快：
git clone --recurse-submodules -b v1.41.0 https://github.com/grpc/grpc
最终：新建一个git项目，一个一个的加子模块，先下载再复制到项目下，OK，终于全部下载下来了。
过程，别试：
主库用gitee同步，可以快速下载。.gitsubmodule中子库（第三方库）怎么一下全部下载呢？
怎么命令不顶用？
git submodule update --recursive
可能是因为我是zip下载的，git clone 下载后是可以用的。
但是子模块下载特别慢。我把所有子模块全同步到gitee
再改.submodules里所有链接到gitee (大家如果用，最好先进我的gitee，每个都点下同步到最新)
[submodule "third_party/zlib"] path = third_party/zlib url = https://gitee.com/chenhao0568/zlib # When using CMake to build, the zlib submodule ends up with a # generated file that makes Git consider the submodule dirty. This # state can be ignored for day-to-day development on gRPC. ignore = dirty [submodule "third_party/protobuf"] path = third_party/protobuf url = https://gitee.com/chenhao0568/protobuf.git [submodule "third_party/googletest"] path = third_party/googletest url = https://gitee.com/chenhao0568/googletest.git [submodule "third_party/benchmark"] path = third_party/benchmark url = https://github.com/google/benchmark [submodule "third_party/boringssl-with-bazel"] path = third_party/boringssl-with-bazel url = https://gitee.com/chenhao0568/boringssl.git [submodule "third_party/re2"] path = third_party/re2 url = https://gitee.com/chenhao0568/re2.git [submodule "third_party/cares/cares"] path = third_party/cares/cares url = https://gitee.com/chenhao0568/c-ares.git branch = cares-1_12_0 [submodule "third_party/bloaty"] path = third_party/bloaty url = https://gitee.com/chenhao0568/bloaty.git [submodule "third_party/abseil-cpp"] path = third_party/abseil-cpp url = https://gitee.com/chenhao0568/abseil-cpp.git branch = lts_2020_02_25 [submodule "third_party/envoy-api"] path = third_party/envoy-api url = https://gitee.com/chenhao0568/data-plane-api.git [submodule "third_party/googleapis"] path = third_party/googleapis url = https://gitee.com/chenhao0568/googleapis.git [submodule "third_party/protoc-gen-validate"] path = third_party/protoc-gen-validate url = https://gitee.com/chenhao0568/protoc-gen-validate.git [submodule "third_party/libuv"] path = third_party/libuv url = https://gitee.com/chenhao0568/libuv.git [submodule "third_party/opencensus-proto"] path = third_party/opencensus-proto url = https://gitee.com/chenhao0568/opencensus-proto.git [submodule "third_party/opentelemetry"] path = third_party/opentelemetry url = https://gitee.com/chenhao0568/opentelemetry-proto.git [submodule "third_party/xds"] path = third_party/xds url = https://gitee.com/chenhao0568/cncf/xds.git
//新建一个分支 git branch gitee //本地修改.gitmodules 地址全改为gitee //提交 git commit 'from gitee OK' //下载子模块 git submodule update --init --recursive
不行。git中submodule修改子模块的git地址不起作用，还是原来的地址。
新建一个git项目，一个一个的加，OK，终于全部下载下来了。
