- Qt Creator Manual
- Managing Projects
- Configuring Projects
- Specifying Build Settings
- CMake Build Configuration
- CMake Presets
- Qt Creator Manual 12.0.2

Cmake Build Configuration ◦ qmake Build Configuration

# CMake Presets

`CMakePresets.json` has options for project-wide builds, whereas `CMakeUserPresets.json` has options for your local builds.

Create the presets files in the format described in cmake-presets(7) and store them in the project's root directory. You can then see them in the Projects view.

Qt Creator supports presets up to version 3 (introduced in CMake 3.21), but does not enforce version checking. It reads and uses all the fields from version 3 if present. It does not support test presets.

You can import the presets the first time you open a project, when no `CMakeLists.txt.user` file exists or you have disabled all kits in the project.

You can view the presets in the Initial Configuration field and in the environment configuration field below it.

To update changes to the `CMakePresets.json` file, select Build > Reload CMake Presets, and then select the presets file to load.

## Configure Presets

The following configure presets instruct CMake to use the default generator on the platform and specify the build directory for all build types. `NOT_COMMON_VALUE` is displayed in Initial Parameters and `AN_ENVIRONMENT_FLAG` in the environment configuration field.

     {
       "version": 1,
       "configurePresets": [
         {
           "name": "preset",
           "displayName": "preset",
           "binaryDir": "${sourceDir}/build/preset",
           "cacheVariables": {
             "NOT_COMMON_VALUE": "NOT_COMMON_VALUE"
             },
           "environment": {
             "AN_ENVIRONMENT_FLAG": "1"
           }
         }
       ]
     }

## MinGW Example

The following example configures a Qt project with:

- MinGW compiler
- build directory – `<sourceDir>/build-release`
- build type – `CMAKE_BUILD_TYPE` as `Release`
- generator – MinGW Makefiles
- path to a CMake executable
- path to the Qt installation via `CMAKE_PREFIX_PATH`

     {
       "version": 1,
       "configurePresets": [
         {
           "name": "mingw",
           "displayName": "MinGW 11.2.0",
           "generator": "MinGW Makefiles",
           "binaryDir": "${sourceDir}/build-release",
           "cmakeExecutable": "C:/Qt/Tools/CMake_64/bin/cmake.exe",
           "cacheVariables": {
             "CMAKE_BUILD_TYPE": "Release",
             "CMAKE_PREFIX_PATH": "C:/Qt/6.4.0/mingw_64"
           },
           "environment": {
             "PATH": "C:/Qt/Tools/mingw1120_64/bin;$penv{PATH}"
           }
         }
       ]
     }

To speed up the process on Windows, specify the `CMAKE_C_COMPILER` and `CMAKE_CXX_COMPILER` in the `cacheVariables` section.

## Ninja Generator Example

The following configure and build presets set Ninja Multi-Config as the generator, add `Debug` and `Release` build steps, and specify the path to `ninja.exe` as a value of the `CMAKE_MAKE_PROGRAM` variable:

     {
       "version": 2,
       "configurePresets": [
         {
           "name": "ninja-nmc",
           "displayName": "Ninja Multi-Config MinGW",
           "generator": "Ninja Multi-Config",
           "binaryDir": "${sourceDir}/build",
           "cacheVariables": {
             "CMAKE_BUILD_TYPE": "Debug;Release",
             "CMAKE_PREFIX_PATH": "C:/Qt/6.4.0/mingw_64"
             "CMAKE_MAKE_PROGRAM": "C:/Qt/Tools/Ninja/ninja.exe"
           },
           "environment": {
             "PATH": "c:/Qt/Tools/mingw1120_64/bin;$penv{PATH}"
           }
         }
       ],
       "buildPresets": [
         {
           "name": "release",
           "displayName": "Ninja Release",
           "configurePreset": "ninja-nmc",
           "configuration": "Release"
         },
         {
           "name": "debug",
           "displayName": "Ninja Debug",
           "configurePreset": "ninja-nmc",
           "configuration": "Debug"
         }
       ]
     }

This example assumes that the CMake executable path is set in Preferences > CMake > Tools.

## MSVC Example

When using MSVC compilers with NMAKE Makefiles, Ninja, or Ninja Multi-Config generators, you can use the `external` strategy for the `architecture` and `toolset` fields. This lets Qt Creator set up the Visual C++ environment before invoking CMake.

For example:

     "generator": "Ninja Multi-Config",
     "toolset": {
       "value": "v142,host=x64",
       "strategy": "external"
     },
     "architecture": {
       "value": "x64",
       "strategy": "external"
     },

If you use MSVC compilers with non-VS generators and have several compilers in the `PATH`, you might also have to specify the compiler to use in `cacheVariables` or `environmentVariables`:

     "generator": "Ninja Multi-Config",
     "toolset": {
       "value": "v142,host=x64",
       "strategy": "external"
     },
     "architecture": {
       "value": "x64",
       "strategy": "external"
     },
     "cacheVariables": {
       "CMAKE_C_COMPILER": "cl.exe",
       "CMAKE_CXX_COMPILER": "cl.exe"
     }

## Using Conditions

The following configure presets are used if they match `condition`. That is, if the `hostSystemName` equals `Linux`, the `linux` presets are used and if it equals `Windows`, the `windows` presets are used.

     {
       "version": 3,
       "configurePresets": [
         {
           "name": "linux",
           "displayName": "Linux GCC",
           "binaryDir": "${sourceDir}/build",
           "cacheVariables": {
             "CMAKE_PREFIX_PATH": "$env{HOME}/Qt/6.4.0/gcc_64"
           },
           "condition": {
             "type": "equals",
             "lhs": "${hostSystemName}",
             "rhs": "Linux"
           }
         },
         {
           "name": "windows",
           "displayName": "Windows MSVC",
           "binaryDir": "${sourceDir}/build",
           "cacheVariables": {
             "CMAKE_PREFIX_PATH": "$env{SYSTEMDRIVE}/Qt/6.4.0/msvc2019_64"
           },
           "condition": {
             "type": "equals",
             "lhs": "${hostSystemName}",
             "rhs": "Windows"
           }
         }
       ]
     }

Cmake Build Configuration ◦ qmake Build Configuration