# No CMAKE\_C\_COMPILER could be found. No CMAKE\_CXX\_COMPILER could be found.

**URL:** https://discourse.cmake.org/t/no-cmake-c-compiler-could-be-found-no-cmake-cxx-compiler-could-be-found/3948
**Category:** Usage
**Tags:** os:windows, lang:c
**Created:** [August 17, 2021, 5:58pm UTC](https://discourse.cmake.org/t/no-cmake-c-compiler-could-be-found-no-cmake-cxx-compiler-could-be-found/3948 "2021-08-17T17:58:33Z")
**Posts on this page:** 1
**Showing post:** 17

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### Author: ![buildSystemPerson](https://discourse.cmake.org/user_avatar/discourse.cmake.org/buildsystemperson/32/2851_2.png) [@buildSystemPerson](https://discourse.cmake.org/u/buildSystemPerson)
#### Post date: [September 8, 2021, 12:40pm UTC](https://discourse.cmake.org/t/no-cmake-c-compiler-could-be-found-no-cmake-cxx-compiler-could-be-found/3948/17 "2021-09-08T12:40:15Z")

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Looks like someone is having a similar issue here:

> [@Windows configure error when using the command line: "The C/CXX compiler identification is unknown.."](https://discourse.cmake.org/t/windows-configure-error-when-using-the-command-line-the-c-cxx-compiler-identification-is-unknown/4053/2):
>
> Guessing: The cmake-gui chooses the 32bit (host and target) version of the compiler. You choose the host=64bit version with CLI

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_[View the full topic](https://discourse.cmake.org/t/no-cmake-c-compiler-could-be-found-no-cmake-cxx-compiler-could-be-found/3948)._