gRPC概述

gRPC (gRPC Remote Procedure Calls) 是Google发起的一个开源远程过程调用 (Remote procedure call) 系统。该系统基于 HTTP/2 协议传输，使用Protocol Buffers 作为接口描述语言。--摘抄自维基百科

gRPC库开源地址

Github：https://github.com/grpc/grpc

码云：https://gitee.com/mirrors/grpc

建议使用码云上的地址进行克隆，否则有可能克隆失败。

安装编译gRPC源码的工具
- Visual Studio 2015以上版本（Visual C++ compiler）
Visual Studio IDE下载地址： https://visualstudio.microsoft.com/zh-hans/vs/older-downloads/
- Git
Git工具下载地址：https://git-scm.com/
- CMake
CMake下载地址：https://cmake.org/download/
- nasm
nasm下载地址：https://www.nasm.us/
- Ninja
Ninja下载地址：https://ninja-build.org/

说明：切记不可使用MinGW编译器，经验之谈（笔者使用Gcc编译器走了好多弯路），Windows平台上必须使用MSVC编译器。

在Windows平台上的构建步骤

从码云上克隆gRPC源码

git clone --recurse-submodules -b v1.42.0 https://gitee.com/mirrors/grpc

提示：在克隆过程中，gRPC源码依赖16个第三方库，由于国内不可抗力的网络环境可能会克隆失败。

进入到grpc的源码目录[cd E:\3rdLibrary\grpc]找到.gitmodules文件，更改内容如下

[submodule "third_party/zlib"]
	path = third_party/zlib
	url = https://gitee.com/mirrors/zlib.git
	# 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/mirrors/protobuf.git
[submodule "third_party/googletest"]
	path = third_party/googletest
	url = https://gitee.com/mirrors/googletest.git
[submodule "third_party/benchmark"]
	path = third_party/benchmark
	url = https://gitee.com/mirrors/benchmark.git
[submodule "third_party/boringssl-with-bazel"]
	path = third_party/boringssl-with-bazel
	url = https://gitee.com/mirrors/boringssl.git
[submodule "third_party/re2"]
	path = third_party/re2
	url = https://gitee.com/mirrors/re2.git
[submodule "third_party/cares/cares"]
	path = third_party/cares/cares
	url = https://gitee.com/mirrors/c-ares.git
	branch = cares-1_12_0
[submodule "third_party/bloaty"]
	path = third_party/bloaty
	url = https://github.com.cnpmjs.org/google/bloaty.git
[submodule "third_party/abseil-cpp"]
	path = third_party/abseil-cpp
	url = https://gitee.com/mirrors/abseil-cpp.git
	branch = lts_2020_02_25
[submodule "third_party/envoy-api"]
	path = third_party/envoy-api
	url = https://github.com.cnpmjs.org/envoyproxy/data-plane-api.git
[submodule "third_party/googleapis"]
	path = third_party/googleapis
	url = https://gitee.com/mirrors/googleapis.git
[submodule "third_party/protoc-gen-validate"]
	path = third_party/protoc-gen-validate
	url = https://gitee.com/mirrors/protoc-gen-validate.git
[submodule "third_party/libuv"]
	path = third_party/libuv
	url = https://gitee.com/mirrors/libuv.git
[submodule "third_party/opencensus-proto"]
	path = third_party/opencensus-proto
	url = https://github.com.cnpmjs.org/census-instrumentation/opencensus-proto.git
[submodule "third_party/opentelemetry"]
	path = third_party/opentelemetry
	url = https://github.com.cnpmjs.org/open-telemetry/opentelemetry-proto.git
[submodule "third_party/xds"]
	path = third_party/xds
	url = https://github.com.cnpmjs.org/cncf/xds.git

以上就是gRPC源码下包含的16个子模块，也是gRPC依赖的第三方库，gRPC在包含第三方库的开源地址都是在Github上，由于Github访问比较困难，故我将其子模块的下载地址更改为国内码云的地址或者github镜像站地址。当然我们也可以进入到grpc\third_party目录下，进行每一个模块的克隆，但是要注意的是boringssl-with-bazel模块和cares模块。

submodule "third_party/boringssl-with-bazel

path = third_party/boringssl-with-bazel

url = https://gitee.com/mirrors/boringssl.git

submodule "third_party/cares/cares"

path = third_party/cares/cares

url = https://gitee.com/mirrors/c-ares.git

branch = cares-1_12_0

以上两个模块的路径，稍不注意就容易犯错，它们俩在grpc\third_party目录下的各自的子目录下。

克隆gRPC库的第三方依赖

git submodule sync

git submodule update --init

使用CMake工具，构建Makefile文件

cd %\grpc%（进入到grpc源码的路径）

//使用VS2015构建静态库
cmake -G "Visual Studio 14 2015" -DgRPC_INSTALL=ON -DgRPC_BUILD_TESTS=OFF ./CMakeLists.txt
//使用VS2017构建静态库
cmake -G "Visual Studio 15 2017" -DgRPC_INSTALL=ON -DgRPC_BUILD_TESTS=OFF ./CMakeLists.txt
//使用VS2019构建静态库
cmake -G "Visual Studio 16 2019" -DgRPC_INSTALL=ON -DgRPC_BUILD_TESTS=OFF ./CMakeLists.txt

//使用VS2017构建动态库
cmake -G "Visual Studio 15 2017" -DgRPC_INSTALL=ON -DgRPC_BUILD_TESTS=OFF -DBUILD_SHARED_LIBS=ON ./CMakeLists.txt

编译

//编译Debug版本
cmake --build . --config Debug
//编译Release版本
cmake --build . --config Release

编译grpc库成果如下

bin目录下的程序集如下：

gRPC学习相关网站
- gRPC官网教程
https://grpc.io/
- gRPC官方文档中文版
http://doc.oschina.net/grpc