ubuntu 下 libwebsockets安装和编译

1.libwebsockets官网：

https://libwebsockets.org/

2.github下载地址：

https://github.com/warmcat/libwebsockets

3.ubuntu 18.04下编译：

解压之后放在桌面上

/home/Desktop/libwebsockets-main

cd /home/Desktop/libwebsockets-main

mkdir build

cd build

cmake .. 

make -j8

sudo make install

在cmake的时候如果电脑出现报错，需要配置cmake，gcc，g++

yige@yige-ThinkPad-T490:~/Desktop/libwebsockets-main/libwebsockets-main/build$ cmake ..
-- The CXX compiler identification is unknown
CMake Error at CMakeLists.txt:66 (project):
  No CMAKE_CXX_COMPILER could be found.

  Tell CMake where to find the compiler by setting either the environment
  variable "CXX" or the CMake cache entry CMAKE_CXX_COMPILER to the full path
  to the compiler, or to the compiler name if it is in the PATH.


-- Configuring incomplete, errors occurred!
See also "/home/yige/Desktop/libwebsockets-main/libwebsockets-main/build/CMakeFiles/CMakeOutput.log".
See also "/home/yige/Desktop/libwebsockets-main/libwebsockets-main/build/CMakeFiles/CMakeError.log".

默认的Ubuntu存储库包含一个名为build-essential的元包，它包含GCC编译器以及编译软件所需的许多库和其他实用程序。

以下命令安装build-essential软件包：

sudo apt install build-essential

安装好之后的测试：

yige@yige-ThinkPad-T490:~/Desktop/libwebsockets-main$ gcc --version
gcc (Ubuntu 7.5.0-3ubuntu1~18.04) 7.5.0
Copyright (C) 2017 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

yige@yige-ThinkPad-T490:~/Desktop/libwebsockets-main$ g++ --version
g++ (Ubuntu 7.5.0-3ubuntu1~18.04) 7.5.0
Copyright (C) 2017 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.