Cmake cxx compiler not set windows

Have you ever tried to build a C++ project with CMake, only to be met with the error message “No CMakeCXXCompiler could be found”? If so, you’re not alone. This is a common problem, and it can be a real pain to troubleshoot.

In this article, we’ll take a look at what causes this error, and how you can fix it. We’ll also discuss some general tips for working with CMake, so that you can avoid this error in the future.

So, if you’re ready to learn more, let’s get started!

CMake is a build system generator that can be used to build software projects across platforms. It is a cross-platform build system that uses a simple configuration file to generate native build files for a variety of platforms. CMake is designed to be used with a variety of compilers, including GCC, Clang, and Visual Studio.

One of the most common errors that CMake users encounter is the “no cmake_cxx_compiler could be found” error. This error occurs when CMake cannot find a suitable C++ compiler on the system. There are a number of reasons why this error might occur, and in this guide, we will discuss some of the most common causes and how to fix them.

What is the cmake_cxx_compiler?

The cmake_cxx_compiler is a CMake variable that specifies the C++ compiler to use for building a project. It can be set either explicitly or implicitly.

When set explicitly, the value of the variable should be the path to the compiler executable. For example, if you are using GCC, you would set the variable to the following value:

cmake_cxx_compiler=/usr/bin/g++

When set implicitly, CMake will attempt to find a suitable compiler on the system. It will do this by looking for a compiler that is installed in the path and that is compatible with the version of CMake that you are using.

Why is the cmake_cxx_compiler not found?

There are a number of reasons why the cmake_cxx_compiler might not be found. Some of the most common reasons include:

• The compiler is not installed on the system.
• The compiler is not in the path.
• The compiler is not a valid C++ compiler.

The compiler is not installed on the system

The most common reason for the “no cmake_cxx_compiler could be found” error is that the compiler is not installed on the system. To check if the compiler is installed, you can run the following command:

which g++

If the compiler is installed, this command will return the path to the compiler executable. If the compiler is not installed, this command will return an error message.

If the compiler is not installed, you can install it using your package manager. For example, to install GCC on Ubuntu, you would run the following command:

sudo apt-get install gcc

The compiler is not in the path

Another common reason for the “no cmake_cxx_compiler could be found” error is that the compiler is not in the path. To check if the compiler is in the path, you can run the following command:

echo $PATH

This command will print a list of directories that are included in the path. If the compiler directory is not included in the path, you can add it using the following command:

export PATH=$PATH:/path/to/compiler

The compiler is not a valid C++ compiler

Finally, it is also possible that the compiler is not a valid C++ compiler. To check if the compiler is a valid C++ compiler, you can run the following command:

g++ –version

If the compiler is a valid C++ compiler, this command will print the version of the compiler. If the compiler is not a valid C++ compiler, this command will return an error message.

Troubleshooting the “no cmake_cxx_compiler could be found” error

If you are still getting the “no cmake_cxx_compiler could be found” error after following the steps above, you can try the following troubleshooting steps:

• Make sure that the compiler is installed and in the path.
• Make sure that the compiler is a valid C++ compiler.
• Try using a different compiler.
• Try using a different version of CMake.
• Try creating a new project.
• Try posting a question on the CMake forums.

The “no cmake_cxx_compiler could be found” error is a common error that CMake users encounter. In this guide, we have discussed some of the most common causes of this error and how to fix them. If you are still getting the error after following the steps above, you can try the troubleshooting steps that we have provided.

3. How to fix the cmake_cxx_compiler not found error?

There are a number of ways to fix the cmake_cxx_compiler not found error. Some of the most common solutions include:

• Installing the compiler on the system. If the compiler is not installed on the system, CMake will not be able to find it. To install the compiler, you can use your system’s package manager or download the compiler from the official website.
• Adding the compiler to the path. If the compiler is installed on the system but not in the path, CMake will not be able to find it. To add the compiler to the path, you can use the following command:

export PATH=$PATH:/path/to/compiler

• Specifying the compiler explicitly in the cmake_cxx_compiler variable. If you are using a custom compiler, you can specify it explicitly in the cmake_cxx_compiler variable. To do this, add the following line to your CMakeLists.txt file:

set(CMAKE_CXX_COMPILER “/path/to/compiler”)

Once you have fixed the cmake_cxx_compiler not found error, you should be able to build your project without any problems.

4. What are the implications of not setting the cmake_cxx_compiler?

If the cmake_cxx_compiler is not set, CMake will not be able to build the project. This can result in a number of errors, including:

• The build will fail.
• The build will produce incorrect results.
• The build will not be able to find the required libraries.

In order to avoid these errors, it is important to make sure that the cmake_cxx_compiler is set correctly. You can do this by installing the compiler on the system, adding the compiler to the path, or specifying the compiler explicitly in the cmake_cxx_compiler variable.

The cmake_cxx_compiler not found error can be a frustrating problem, but it is usually easy to fix. By following the steps in this guide, you should be able to resolve the error and get your project building again.

Q: What does it mean when I get the error message “no cmake_cxx_compiler could be found”?

A: This error message means that the CMake build system cannot find a C++ compiler that it can use to build your project. This can happen for a variety of reasons, but the most common is that you don’t have a C++ compiler installed on your system.

Q: How can I fix the error “no cmake_cxx_compiler could be found”?

A: There are a few things you can try to fix this error. First, make sure that you have a C++ compiler installed on your system. If you’re not sure, you can check by opening a terminal window and typing the following command:

which g++

If this command returns a path to a C++ compiler, then you have a C++ compiler installed. If it doesn’t return a path, then you need to install a C++ compiler.

Once you have a C++ compiler installed, you need to tell CMake where it is. You can do this by setting the `CMAKE_CXX_COMPILER` environment variable. For example, if your C++ compiler is installed in the `/usr/bin` directory, you would set the environment variable like this:

export CMAKE_CXX_COMPILER=/usr/bin/g++

You can also set the `CMAKE_CXX_COMPILER` variable in your CMake project’s CMakeLists.txt file. For example:

set(CMAKE_CXX_COMPILER “/usr/bin/g++”)

Once you’ve set the `CMAKE_CXX_COMPILER` variable, you should be able to build your project without any problems.

Q: What other errors can I get if I don’t have a C++ compiler installed?

A: If you don’t have a C++ compiler installed, you might also get the following errors:

• `CMake Error: CMAKE_CXX_COMPILER not set`
• `CMake Error: Could not find C++ compiler`
• `CMake Error: The C++ compiler “g++” is not found`

These errors all mean that CMake cannot find a C++ compiler to use. You can fix these errors by following the steps in the previous question.

Q: I have a C++ compiler installed, but I’m still getting the error “no cmake_cxx_compiler could be found”. What can I do?

A: There are a few things you can try if you’re still getting the error even though you have a C++ compiler installed. First, make sure that the C++ compiler is in your PATH environment variable. You can check this by opening a terminal window and typing the following command:

echo $PATH

If the path to your C++ compiler is not in the output of this command, then you need to add it to your PATH environment variable. You can do this by editing your `.bashrc` or `.zshrc` file. For example, if your C++ compiler is installed in the `/usr/bin` directory, you would add the following line to your `.bashrc` file:

export PATH=$PATH:/usr/bin

Once you’ve added the path to your C++ compiler to your PATH environment variable, you should be able to build your project without any problems.

Q: I’m using a Windows machine, and I’m getting the error “no cmake_cxx_compiler could be found”. What can I do?

A: If you’re using a Windows machine, you can install the Microsoft Visual C++ compiler. This compiler is included with the Microsoft Visual Studio development environment. Once you have the Microsoft Visual C++ compiler installed, you should be able to build your project without any problems.

Q: I’m using a Mac machine, and I’m getting the error “no cmake_cxx_compiler could be found”. What can I do?

A: If you’re using a Mac machine, you can install the Apple Xcode development environment. This environment includes a C++ compiler that you can use to build your project. Once you have the Apple Xcode development environment installed, you should be able to build your project without any problems.

Q:

In this blog post, we have discussed the error message No CMake CXX compiler could be found. We have explained the causes of this error and provided solutions for how to fix it. We hope that this blog post has been helpful and that you are now able to resolve this error.

Смотрите.

я живу под виндой, разрабатываю на C++ и при этом я не пользуюсь ни Visual Studio, ни Microsoft’овским компилятором.

До сих пор очень хорошо себя проявлял установленный через MSYS2 пакет WinGW-64 с gcc — шными компилятором и дебаггером. А в качестве редактора — легковесная Visual Studio Code.

Однако, это порождает ряд проблем.

Мне очень тяжело собрать какой нибудь проект, взятый c github.

То, что в убунте делается тремя командами git clone - make - make install для меня выливается в несколько дней поисков и чтения форумов.

Сейчас я пытаюсь сделать следующее:

подавляющее большинство проектов собираются при помощи CMake.

То есть, сначала CMake, а потом уже make и make install

Но CMake, будучи запущенным под Windows, автоматически создает проект типа *.sln — солюшен для Visual Studio.

Я поискал — нашел вот такой вот вопрос-ответ

Но всё равно непонятно, как при запуске CMake сказать ему, чтобы он собирал проект для обычного make. Ну, или хотя бы для чего нибудь, что я могу использовать совместно с gcc.

Подскажите, пожалуйста, как правильно мучить CMake под виндой?

Спасибо.

Дополняю вопрос Мне @Fat-Zer любезно подсказал, что команда должна быть такой:

cmake -G "MSYS Makefiles" ..

Вот я беру hello world

    #include <iostream>
    int main(int argc, char** argv)
    {
        std::cout << "Hello, World!" << std::endl;
        return 0;
    }

и такого же вида heelo world в смысле cmake: CMakeLists.txt:

    project(HelloWorld)

    cmake_minimum_required(VERSION 3.10)

    add_executable(main main.cpp)

Запускаю cmake -G "MSYS Makefiles" .. (во временной вложенной директории), получаю:

    CMake Error: CMake was unable to find a build program corresponding to "MSYS Makefiles".  CMAKE_MAKE_PROGRAM is not set.  You probably need to select a different build tool.
    CMake Error: CMake was unable to find a build program corresponding to "MSYS Makefiles".  CMAKE_MAKE_PROGRAM is not set.  You probably need to select a different build tool.
    CMake Error: CMAKE_C_COMPILER not set, after EnableLanguage
    CMake Error: CMAKE_CXX_COMPILER not set, after EnableLanguage
    CMake Error: CMAKE_AR was not found, please set to archive program.
    -- Configuring incomplete, errors occurred!

Не могли бы Вы подсказать мне следующие шаги, что нужно сделать, чтобы проект для MSYS собирался?

Issue

CMake Error: CMAKE_Project_COMPILER not set, after EnableLanguage

I Get this Error after writing cmake ..

This is my CMakeLists.txt

set(CMAKE_CXX_COMPILER "C:/mingw64/bin/g++")
set(CMAKE_C_COMPILER "C:/mingw64/bin/gcc")

project(CXX Project)

add_subdirectory(glfw/)

add_executable(${PROJECT_NAME} Main.cpp)
target_include_directories(${PROJECT_NAME} PUBLIC glfw)
target_link_libraries(${PROJECT_NAME} PUBLIC glfw)```


And this is my Complete Error
PS C:\Users\david\Documents\Idle\Project\build> cmake ..
CMake Error at CMakeLists.txt:6 (project):
  Running

   'nmake' '-?'

  failed with:

   Das System kann die angegebene Datei nicht finden


CMake Error: CMAKE_Project_COMPILER not set, after EnableLanguage
-- Configuring incomplete, errors occurred!
See also "C:/Users/david/Documents/Idle/Project/build/CMakeFiles/CMakeOutput.log".

Solution

You’re using the project command in the wrong way. It should be

project(Project CXX)

That’s why CMake is looking for CMAKE_Project_COMPILER instead of CMAKE_CXX_COMPILER.

Answered By — Some programmer dude

Answer Checked By — Marilyn (WPSolving Volunteer)

The no cmake_cxx_compiler could be found Ubuntu code exception usually happens when your system does not have a good C++ compiler. In addition, we experienced a similar cmake error after installing Visual Studio 15 2017, a version with several inconsistencies and bugs.

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Although advanced projects and applications render unique inputs, the solutions and causes apply to all instances. Therefore, we will also teach you how to reproduce the no cmake_cxx_compiler could be found. Windows bug using standard elements and illustrations that should help you troubleshoot the program and pinpoint the exact broken procedures.

When Does the No cmake_cxx_compiler Could Be Found Error Happens?

The no cmake_cxx_compiler could be found Fedora error log usually happens when the system misses a good C++ compiler. However, we confirmed an identical code exception after installing Visual Studio 15 2017, a version with many inconsistencies and bugs. Therefore, both instances display the same error log.

For instance, your system has likely experienced the no cmake_cxx_compiler could be found Linux bug due to a missing C++ compiler, confusing the main functions and halting further operations. As a result, your system displays a warning confirming the flaws and inconsistencies and terminating the application, which can affect other elements.

So, although repairing your program and implementing the debugging methods sounds logical, you must troubleshoot the system and locate the no cmake_cxx_compiler could be found Xcode before changing the inputs. This will help you avoid further complications and errors by isolating the incorrect code snippet and writing the adequate values.

On the flip side, the no cmake_cxx_compiler could be found Debian error occurred after installing Visual Studio 15 2017, which should not happen with advanced projects and applications. This culprit confirms the bug’s dynamic trait and characteristic, making it challenging to pinpoint the broken elements and cxx compilers.

Although cxx compilers and elements only take a few code lines, the scripts can display the no cmake_cxx_compiler could be found Windows 10 bug. However, as you will soon learn, other features and values do not change the error’s cause and debugging approaches.

– Cmake Fails on a Project Without Adequate Commands

This article’s introductory broken instance launches an exception, and the cmake fails due to inadequate C++ commands. As a result, we will exemplify the no cmake_cxx_compiler could be found. Wsl by listing the JSON files and values, although the cmake environment renders and launches the functions. You can use this code snippet to troubleshoot the elements because it indicates the exact failed locations and paths and the lack of functional C++ commands.

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You can learn about the invalid code in the following example:

Although we could list other values, we kept this example as short as possible while recreating the failed procedure.

– Launching Functions With Missing C++ Compilers

The error is almost inevitable when your system misses good C++ compilers for the main commands, as confirmed in the introductory chapter. For instance, the code snippet attempts to RLottie with a cmake file configuring the leading build directory.

As a result, the system throws an error log confirming the failed instances and exemplifies incomplete configuration. Next, we will exemplify the processes of detecting the features and checking for a functional compiler.

You can learn about the broken code in the following snippet:

As you can tell, the error log has a similar visual output to the former chapter, confirming the mistake’s equal culprits and indicators. Still, overcoming it is relatively straightforward and only takes a minute.

How To Fix the No cmake_cxx_compiler Could Be Found Code Exception?

You can fix the lack of cmake cxx compiler code exceptions by installing the C++ and G++ compilers using standard commands. In addition, you must provide the related packages by manually creating several folders and necessary files. Both debugging methods require introducing new inputs.



Debugging this error log is straightforward, although the solutions change your inputs and properties.

So, refer to the following code snippet to learn how to install C++ and G++ compilers:

The code exception should disappear, and you will reenable all processes. Still, other debugging approaches exist.

You can install the related C++ compiler packages to overcome the error log and prevent further complications. As a result, you must first download the necessary packages and follow the on-screen prompts to complete the procedure. Finally, the system returns the processes and confirms the successful operations.

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The following example provides the corrected code snippet:

You can copy and paste this approach to your document to remove the code exception.

Conclusion

The no cmake_cxx_compiler could be found code exception happens when your system does not have a C++ compiler. However, we fixed the issues, so let us remember the critical points:

• We confirmed an identical code exception after installing Visual Studio 15 2017
• You can fix the lack of cmake cxx compiler code exception by installing the C++ and G++ compilers using standard commands
• Install the related C++ compiler packages to overcome the error log and prevent further complications

This guide proves that fixing the broken exception is straightforward and takes little time using our debugging methods. In addition, you will prevent further mistakes and bugs.