See CMake kits for more information about how kits work. A kit may also define a preferredGenerator. When CMake Tools runs the configure step, it takes the following into consideration:ĬMake kits provide information about the toolchains available on your system that can be used with CMake to build your projects.įor toolchain, CMake Tools sets the CMake cache variable CMAKE_TOOLCHAIN_FILE to the path to the file specified by the kit.įor compilers, CMake Tools sets the CMAKE_COMPILER cache variable to point to the path for each defined in the kit.įor Visual Studio, CMake Tools sets environment variables necessary to use the selected Visual Studio installation, and sets CC and CXX to cl.exe so that CMake will detect the Visual C++ compiler as the primary compiler, even if other compilers like GCC are present on $Path.Įach kit may also define additional cache variable settings required for the kit to operate. The CMake Tools configure stepĬMake Tools drives CMake via the cmake-file-api which provides project info via a file on disk. If you are building from within Visual Studio Code, we recommend you use the Ninja build tool. Regardless of generator, CMake Tools always supports building from within Visual Studio Code. There are many different Visual Studio generators, so it is recommended to let CMake Tools automatically determine the appropriate generator. See cmake.preferredGenerators.Įmits a Makefile for the project that can be built via make.Įmits visual studio solutions and project files. This is the generator CMake Tools tries first, unless configured otherwise. There are several families of generators available: GeneratorĮmits files for the Ninja build tool. The Generator tells CMake what kind of tool will be used to compile and generate the results of the build. The result of a configure depends on the CMake Generator. Unless overwritten or deleted, values in the CMake Cache persist between CMake runs.ĬMake doesn't do the build itself, it relies on build tools installed on your system. (CMake Tools doesn't use CMake's -C argument). On the CMake command line, these appear as -D arguments. These allow you to control the build settings. Values that offer control to the developer, such as BUILD_TESTING to determine whether or not to build test libraries/executables.Ĭache initializer arguments are the arguments passed to CMake that set values in the cache before any CMake scripts are run.Values that rarely change, such as the path to a header/library.Values that are expensive to determine, such as whether a -flag or #include file is supported by the compiler.The CMake Cache is a list of key-value pairs that persist between runs of the configure process. The following concepts will help you understand how CMake Tools interacts with CMake's configure process: Tutorial examples are progressive so that each step provides the completeĮnable_testing() # does the application run add_test( NAME Runs COMMAND Tutorial 25 ) # does the usage message work? add_test( NAME Usage COMMAND Tutorial ) set_tests_properties( Usage PROPERTIES PASS_REGULAR_EXPRESSION "Usage.In CMake, configure refers to detecting requirements and generating the build files that will produce the final compiled artifacts. Its own subdirectory containing code that may be used as a starting point. Help/guide/tutorial directory of the CMake source code tree. The tutorialĭocumentation and source code for examples can be found in the Work together in an example project can be very helpful. The CMake tutorial provides a step-by-step guide that covers common build Adding a Version Number and Configured Header FileĪdding Usage Requirements for Library (Step 3)Īdding a Custom Command and Generated File (Step 6)
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