Cmake错误设置编译器 [英] Cmake error setting compiler

问题描述

由于某些原因，CMake的C和C ++编译器默认设置为 / usr / bin / qcc 。我已遵循此帖，尝试了命令 p>

For some reason, CMake's C and C++ compilers are set by default to /usr/bin/qcc. I've followed this post and tried the command

cmake -D CMAKE_C_COMPILER = / usr / bin / gcc -D CMAKE_CXX_COMPILER = / usr / bin / g ++

cmake -D CMAKE_C_COMPILER=/usr/bin/gcc -D CMAKE_CXX_COMPILER=/usr/bin/g++

但我得到错误

CMake错误：源目录[current directory ] / CMAKE_CXX_COMPILER = / usr / bin / g ++不存在。

CMake Error: The source directory [current directory]/CMAKE_CXX_COMPILER=/usr/bin/g++" does not exist.

为什么CMake将我的命令解释为目录，是设置CMake编译器的正确方法？

Why is CMake interpreting my commands as a directory, and what is the correct way to set CMake's compilers?

推荐答案

你有正确的想法，但是你想要的命令行是：

You've got the right idea, however the command line you want is:

cmake -DCMAKE_C_COMPILER=/usr/bin/gcc -DCMAKE_CXX_COMPILER=/usr/bin/g++ <path_to_source>

区别是微妙的。 -D 和变量被设置，这就是为什么CMake解释你的变量赋值为一个目录。另外，CMake对C ++特定的变量使用 CXX ，这使它与Make保持一致。

The differences are subtle. There should be no space between the -D and the variable being set, which is why CMake is interpreting your variable assignment as a directory. Also CMake uses CXX for C++ specific variables, which keeps it consistent with Make.

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