Why is there `No CMAKE_CXX_COMPILER could be found.` and how to solve?

Question

I just installed cmake but I'm getting compiler not found error.

In trying to build https://gitlab.com/interception/linux/tools on a new Kubuntu installation, running cmake .. from the tools/build directory returns the error:

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.

What's wrong? I assumed cmake would be equipped with its compiler, but maybe it needs to be configured before it can be used???

alec · Accepted Answer · 2021-03-01T17:36:25.490

50

The "compiler" is a separate package that needs to be installed. One called g++ can be installed on it's own and is also included within a bundle of packages called "build-essential".

Thus sudo apt-get install build-essential solves the problem (and sudo apt-get install g++ should also work), allowing cmake .. to work with no configuration necessary.

edited Mar 01 '21 at 17:36

answered Mar 25 '20 at 21:11

alec

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Apparently `cmake` is useful outside the context of *compiling*. See [is it possible to use cmake without any compiler](https://stackoverflow.com/questions/46176955/is-it-possible-to-use-cmake-without-any-compiler). – alec Dec 31 '20 at 18:53
1

I already had `build-essentials` and `g++` but still encountered this error. Seems in my case I had to install `clang`. (`sudo apt-get install clang`) – Seth Falco Jul 31 '22 at 19:49

score 2 · Answer 2 · answered Dec 28 '22 at 13:40

2

I ran into the same issue with Alpine. After installing the following libraries, everything went through as expected:

apk add git cmake make clang build-base llvm-static llvm-dev clang-static clang-dev

answered Dec 28 '22 at 13:40

wout

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score 1 · Answer 3 · edited Jan 18 '23 at 18:57

1

For CenOS variant distros it was missing nasm. Installing it solves the issue:

yum install -y nasm

edited Jan 18 '23 at 18:57

alec

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answered May 27 '22 at 09:20

Salem F

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score 0 · Answer 4 · edited Jan 17 '23 at 10:34

0

First download eCAL archives(latest version) install. Go to terminal type:

sudo apt-get update
sudo apt-get install ecal
sudo apt-get install build-essential
sudo apt install cmake g++ libprotobuf-dev protobuf-compiler
sudo apt-get update

edited Jan 17 '23 at 10:34

Fco Javier Balón

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answered Jan 16 '23 at 11:09

Rohit Gupta

1

Why is there `No CMAKE_CXX_COMPILER could be found.` and how to solve?

4 Answers4