grpc|protobuf的安装、编译、运行笔记(C++)

一、下载grpc源码

如果你的电脑/服务器可以做代理，然后稳定链接上 GitHub 那么完全可以按照 GitHub 的官方文档来操作，我这里采用 Gitee 镜像来操作

git clone https://gitee.com/jiangxy__loey/grpc.git

二、下载依赖库

进入grpc目录，然后里面有一个 .gitmodules 文件，我们将其替换成 gitee 的链接，首先清空内容

> .gitmodules

然后再将新内容填入：

[submodule "third_party/zlib"]
	path = third_party/zlib
	#url = https://github.com/madler/zlib
	url = https://gitee.com/jiangxy__loey/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/jiangxy__loey/protobuf.git
	#url = https://github.com/google/protobuf.git
[submodule "third_party/gflags"]
	path = third_party/gflags
	#url = https://github.com/gflags/gflags.git
	url = https://gitee.com/jiangxy__loey/gflags.git
[submodule "third_party/benchmark"]
	path = third_party/benchmark
	#url = https://github.com/google/benchmark
	url = https://gitee.com/jiangxy__loey/benchmark.git
[submodule "third_party/boringssl-with-bazel"]
	path = third_party/boringssl-with-bazel
	#url = https://github.com/google/boringssl.git
	url = https://gitee.com/jiangxy__loey/boringssl-with-bazel.git
[submodule "third_party/re2"]
	path = third_party/re2
	#url = git://github.com/google/re2.git
	url = https://gitee.com/hejuncheng1/re2.git
[submodule "third_party/cares/cares"]
	path = third_party/cares/cares
	#url = https://github.com/c-ares/c-ares.git
	url = https://gitee.com/jiangxy__loey/cares.git
	#branch = cares-1_12_0
[submodule "third_party/bloaty"]
	path = third_party/bloaty
	#url = https://github.com/google/bloaty.git
	url = https://gitee.com/jiangxy__loey/bloaty.git
[submodule "third_party/abseil-cpp"]
	path = third_party/abseil-cpp
	#url = https://github.com/abseil/abseil-cpp.git
	url = https://gitee.com/jiangxy__loey/abseil-cpp.git
	branch = lts_2020_02_25
[submodule "third_party/envoy-api"]
	path = third_party/envoy-api
	#url = https://github.com/envoyproxy/data-plane-api.git
	url = https://gitee.com/jiangxy__loey/envoy-api.git
[submodule "third_party/googleapis"]
	path = third_party/googleapis
	#url = https://github.com/googleapis/googleapis.git
	url = https://gitee.com/jiangxy__loey/googleapis.git
[submodule "third_party/protoc-gen-validate"]
	path = third_party/protoc-gen-validate
	#url = https://github.com/envoyproxy/protoc-gen-validate.git
	url = https://gitee.com/jiangxy__loey/protoc-gen-validate.git
[submodule "third_party/udpa"]
	path = third_party/udpa
	#url = https://github.com/cncf/udpa.git
	url = https://gitee.com/jiangxy__loey/udpa.git
[submodule "third_party/libuv"]
	path = third_party/libuv
	#url = https://github.com/libuv/libuv.git
	url = https://gitee.com/jiangxy__loey/libuv.git

然后下载：

git submodule update --init

当然如果如果说你的电脑不能科学上网或者上面的操作报错了，说明电脑网络有问题，可以直接下载这个继续操作：
链接：https://pan.baidu.com/s/1sPFO5jXKBJnbNQwiWCLQEw?pwd=wmak
提取码：wmak

四、安装工具和环境依赖

sudo apt-get install pkg-config
sudo apt-get install autoconf automake libtool make g++ unzip
sudo apt-get install libgflags-dev libgtest-dev
sudo apt-get install clang libc++-dev

五、编译protobuf

进入grpc/third_party/protobuf 目录，然后给 autogen.sh 文件加上执行权限：

chmod +x autogen.sh

因为是在 gitee 下载的文件，所以文本格式为 PC，我们需要将其转化为 unix，否则编译会报错，我们通过借助dos2unix工具转换

• 下载工具

apt install dos2unix

• 在 grpc/third_party/protobuf 目录下对所有文件进行格式转换

dos2unix  *

此时格式替换完成，我们就可以开始编译 protobuf 了，执行 autogen.sh 脚本即可

./autogen.sh

假设新建库的输出路径 /usr/local
设置库的输出路径

./configure --prefix=/usr/local

开始编译（可能会编的有点久，看个人机器）

make
make check
sudo make install
sudo ldconfig  # 使得新安装的动态库能被加载

protoc --version
显示3.19.4

注意，在这一步可能会遇到找不到gawk 的情况
我们只需要apt安装即可

apt install gawk

编译完成后此时我们进入/home/mangata/grpc_learn/grpc/protobuf，然后输出一下当前的目录结构：

到这里， protobuf 编译完成，接下来就是编译 grpc

六、编译grpc

我们回到 grpc/ 这个路径，然后执行下面的操作即可完成

mkdir -p cmake/build
cd cmake/build
cmake ../..
make
sudo make install

在sudo make install 报错了，那就去 /usr/local/share/man/ 目录将man1 删掉，并且创建一个man1 的文件夹

七、测试

进入grpc/examples/cpp/helloworld 目录，然后创建build 文件夹

cd grpc/examples/cpp/helloworld/
mkdir build
cd build/
cmake ..
make

进入 build 文件夹cd build ，然后cmake .. ,最后输入 make

启动服务和客户端

# 启动服务端，监听在50051端口
./greeter_server
Server listening on 0.0.0.0:50051
# 启动客户端，服务端返回Hello world
./greeter_client 
Greeter received: Hello world

看到回应 Hello world 就完成了，接下来就是学习 grpc 的四种模式了，下期再见~