【CMake】CMake Error at CMakeLists.txt:3 (project): No CMAKE_CXX_COMPILER could be found.

问题描述

在执行 cmake 命令时遇到错误。

-- The C compiler identification is GNU 11.4.0
-- The CXX compiler identification is unknown
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /usr/bin/cc - skipped
-- Detecting C compile features
-- Detecting C compile features - done
CMake Error at CMakeLists.txt:3 (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!

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原因分析

错误信息显示，CMake无法找到C++编译器（CMAKE_CXX_COMPILER）。可能是因为系统中没有安装C++编译器，或者CMake无法在系统路径中找到编译器。

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解决方案

1. 安装 g++。

sudo apt install g++

2. 安装完成后，再次运行 cmake 命令。