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How to Specify Unix Makefile Generator In Cmake?

2 minutes read

To specify a Unix Makefile generator in CMake, you can use the -G option followed by the generator name. For Unix Makefiles specifically, you can specify it using the following command:

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cmake -G "Unix Makefiles" path_to_source_directory


This will generate Unix Makefiles for building your project. Make sure to replace path_to_source_directory with the actual path to your CMake project directory. This will ensure that CMake generates Makefiles suitable for building on Unix systems.


What is the method for setting the environment variables in cmake makefile generators?

To set environment variables in CMake makefile generators, you can use the following syntax:

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set(ENV{ENV_VARIABLE} "value")


For example, to set the FOO environment variable to bar, you can add the following line to your CMakeLists.txt file:

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set(ENV{FOO} "bar")


This will set the FOO environment variable to bar for the duration of the build process.


How to specify a multi-configuration generator in cmake for makefiles?

To specify a multi-configuration generator in CMake for makefiles, you can use the -G flag when running CMake to specify the generator you want to use. The generator you specify should support multiple configurations.


For example, if you want to generate makefiles for a multi-configuration build system like Ninja, you can run CMake with the following command:

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cmake -B build_dir -G "Ninja Multi-Config" path_to_source


This will generate makefiles for Ninja that support multiple configurations (e.g. Debug, Release, etc.).


Alternatively, you can specify the generator in your CMakeLists.txt file using the CMAKE_GENERATOR variable like so:

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set(CMAKE_GENERATOR "Ninja Multi-Config")


This will ensure that CMake uses the specified generator when generating makefiles.


How to check the list of available generators in cmake?

To check the list of available generators in CMake, you can use the following command:

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cmake --help


This will display a list of available CMake command-line options, including a section on generators. You can also specify the -G flag followed by an invalid generator name to see a list of available generators:

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cmake -G "InvalidGeneratorName"


This will display an error message listing all available generators that can be used with the -G flag.

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