linux下protobuf 下载并cmake编译安装全过程脚本

清疚 2022-06-14 00:20 494阅读 0赞

# protobuf源码下载 #

github上下载最新版本的protobuf源码zip包，并解压缩到本地  
fetch\_protobuf.sh

#!/bin/bash
    
    shell_folder=$(cd "$(dirname "$0")";pwd)
    pushd $shell_folder
    #如果指定的文件/文件夹存在则删除，删除失败则中止脚本
    remove_if_exist(){
        if [ $# -eq 1 ]
        then
            if [ -e $1 ]
            then
                rm $1 -fr
                if [ ! $? -eq 0 ]
                then
                    exit -1
                fi
            fi
            return 0
        else 
            echo invalid argument:
            echo $*
            exit -1
        fi
    }
    exit_on_error(){
      if [ ! $? -eq 0 ]
      then
        exit -1
      fi
    }
    # 如果文件存在且checksum与$2指定的md5相等则返回 1,否则返回0
    # $1 待检查的文件路径
    # $2 md5校验码
    need_download(){
      if [ $# -eq 2 ]
        then
          if [ -f $1 ]; then
            echo "File already exists. Checking md5..."
            os=`uname -s`
            if [ "$os" = "Linux" ]; then
              checksum=`md5sum $1 | awk '{ print $1 }'`
            elif [ "$os" = "Darwin" ]; then
              checksum=`cat $1 | md5`
            fi
            if [ "$checksum" = "$2" ]; then
              echo "Checksum is correct. No need to download $1."
              return 1
            else
              echo "Checksum is incorrect. Need to download again $1"                
            fi
        else
          return 0
        fi
      else 
        echo invalid argument:
        echo $*
        exit -1
      fi
    }
    # 从github上下载源码,如果本地不存在指定的zip包，或md5校验码不匹配则从github下载
    # $1 项目名称
    # $2 版本号
    # $3 zip文件的md5
    # $4 项目所有者名称
    # $5 zip包文件名前缀
    download_from_github(){
      if [ $# -eq 5 ]
      then
        project_folder="$1-$2"
        project_package="$project_folder.zip"
        if need_download $project_package $3
        then
          echo "(下载源码)downloading $1 $2 source"
          wget --no-check-certificate https://github.com/$4/$1/archive/$5$2.zip -O $project_package
          exit_on_error
        fi
        remove_if_exist $project_folder
        unzip $project_package
        exit_on_error
      else
        echo invalid argument:
        echo $*
        exit -1
      fi
    }
    
    download_from_github "protobuf" "3.3.1" "9377e414994fa6165ecb58a41cca3b40" "google" "v"
    
    popd

# protobuf编译安装 #

对下载的protobuf源码编译并安装到release/protobuf\_linux\_x86\_64文件夹下  
build\_protobuf.sh

#!/bin/bash
    GXX_PATH="-DCMAKE_BUILD_TYPE:STRING=RELEASE"
    INSTALL_FOLDER=$(dirname $(readlink -f $0))/release/protobuf_linux_x86_64
    pushd protobuf-3.3.1
    echo INSTALL_FOLDER:$INSTALL_FOLDER
    if [ -d build.gcc ]
    then 
        rm -fr build.gcc/*
    else 
        mkdir build.gcc
    fi
    pushd build.gcc
    cmake ../cmake $GXX_PATH -G "Unix Makefiles" -DCMAKE_INSTALL_PREFIX=$INSTALL_FOLDER  -Dprotobuf_BUILD_TESTS=off
    # 编译并安装protobuf到指定的文件夹
    make install
    popd
    rm -fr build.gcc
    popd

上面的脚本中在调用cmake生成Makefile时定义了`protobuf_BUILD_TESTS=off`,这是因为protobuf的CMakeLists.txt中默认定义`protobuf_BUILD_TESTS=on`，  
而当`protobuf_BUILD_TESTS=on`时，需要gmock支持([https://github.com/google/googlemock][https_github.com_google_googlemock]),否则cmake会报如下错误：

> CMake Error at tests.cmake:2 (message):  
> Cannot find gmock directory.

gmock是google公司推出的一款开源的白盒测试工具，对于我们一般的应用来说，不需要gmock提供的功能，所以这里可以将`protobuf_BUILD_TESTS=off`，避免麻烦。

[https_github.com_google_googlemock]: https://github.com/google/googlemock