C++ Crow web框架使用；升级cmake ；pthread、boost、asio 报错

参考：https://crowcpp.org/master/getting_started/setup/linux/
https://github.com/CrowCpp/Crow

1、安装：

git clone https://github.com/CrowCpp/Crow.git

mkdir build

cmake ..

make
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效果：
Crow/build/examples下运行

测试访问结果
***自己编写例子
crow_hello.cpp

#include 

int main(){
    crow::SimpleApp app;
    //测试
     CROW_ROUTE(app, "/test")([](){
        return "Hello world";
    });
    app.port(18888).multithreaded().run();
}

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编译：
如果不添加-lboost_system会报错undefined reference to `boost::system::generic_category()；
-lpthread 会报错 undefined reference to symbol ‘pthread_sigmask@@GLIBC_2.2.5’

g++ crow_hello.cpp -o crow_hello -lboost_system  -lpthread
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运行：

升级cmake

参考：https://blog.csdn.net/weixin_54227557/article/details/124514186

sudo rm -rf /usr/bin/cmake

wget https://cmake.org/files/v3.16/cmake-3.16.8-Linux-x86_64.tar.gz

tar zxvf cmake-3.16.8-Linux-x86_64.tar.gz

sudo ln -s  /data/loong/cmake-3.16.8-Linux-x86_64/bin/cmake /usr/bin/cmake

cmake --version
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3、各种安装报错pthread、boost、asio

1）pthread

sudo apt install doxygen
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2）boost

安装如果出现E: Failed to fetch；参考https://blog.csdn.net/davidietop/article/details/88909622

sudo apt-get install libboost-all-dev --fix-missing
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3）asio
下载解压https://think-async.com/Asio/LatestStableRelease.html：

wget https://sourceforge.net/projects/asio/files/asio/1.22.2%20%28Stable%29/asio-1.22.2.zip/download

unzip download
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安装：

cd asio-1.22.2

./configure --without-boost
make
sudo make install
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***安装完再去重新cmake、make Crow