This allows each subdirectory to define just the sources it provides and to delegate any further nested subdirectories with another include(). With the subdirectory files structured something like this: list(APPEND myApp_SOURCES # it doesn't have to be called CMakeLists.txt The top level CMakeLists.txt file then looks something like this: # The name of the included file could be anything, Then after all the subdirectories have been included, add_executable() or add_library() is called, but this time passing just the variable instead of an explicit list of files. The logical improvement many developers then make is to build up the list of source files in a variable as each subdirectory is pulled in via include(). It also results in having to repeat the directory structure, which reduces the benefit of structuring source files into directories in the first place. ![]() When the number of source files grows large and they get distributed over a number of subdirectories, possibly nested to multiple levels, this quickly becomes unwieldly. Eg: add_executable(myApp src1.cpp src2.cpp) Typically, developers first learn CMake in a very simple manner, defining a target by listing the source files directly in the add_executable() or add_library() command itself. Source files can be added to third party project targets without having to modify the third party project files. ![]() Source files gain the ability to become part of a target’s interface.Dependency information can be specified closer to where the actual dependencies exist in the directory hierarchy.It can lead to cleaner and more concise CMakeLists.txt project files.While the CMake documentation succintly describes what target_sources() does, it fails to highlight just how useful the new command is and why it promotes better CMake projects: With CMake 3.1, a new command target_sources() was introduced which provides the missing piece among the various target_. In such projects, traditional approaches usually either list all source files at the top-most level or build up the list of source files in a variable and pass that to add_library(), add_executable(), etc. These files may be distributed across various subdirectories, which may themselves be nested multiple levels deep. In all but trivial CMake projects, it is common to find targets built from a large number of source files. Key updates are noted within the article. Passed 0.Updated December 2018: Parts of this article have been reworked to account for improvements made with the CMake 3.13.0 release. my_project/buildġ/1 Test #1: HelloTest.BasicAssertions. The CXX compiler identification is GNU 10.2.1 The C compiler identification is GNU 10.2.1 Now you can build and run your test: my_project$ cmake -S. Last two lines enable CMake’s test runner to discover the tests included in the You want to build ( hello_test), and links it to GoogleTest ( gtest_main). The above configuration enables testing in CMake, declares the C++ test binary ) include (GoogleTest ) gtest_discover_tests (hello_test ) With GoogleTest declared as a dependency, you can use GoogleTest code withinĪs an example, create a file named hello_ in your my_project Hash often to point to the latest version.įor more information about how to create CMakeLists.txt files, see the The Git commit hash of the GoogleTest version to use we recommend updating the The above configuration declares a dependency on GoogleTest which is downloadedįrom GitHub. ) # For Windows: Prevent overriding the parent project's compiler/linker settings set (gtest_force_shared_crt ON CACHE BOOL "" FORCE ) FetchContent_MakeAvailable (googletest ) You’ll use this file to set up your project and declare a dependency onįirst, create a directory for your project:Ĭmake_minimum_required (VERSION 3.14 ) project (my_project ) # GoogleTest requires at least C++14 set (CMAKE_CXX_STANDARD 14 ) set (CMAKE_CXX_STANDARD_REQUIRED ON ) include (FetchContent ) FetchContent_Declare ( Set up a projectĬMake uses a file named CMakeLists.txt to configure the build system for a Note: The terminal commands in this tutorial show a Unix shell prompt, but theĬommands work on the Windows command line as well. If you don’t already have CMake installed, see the See Supported Platforms for more information about platforms CMake and a compatible build tool for building the.A compatible C++ compiler that supports at least C++14.You’re using GoogleTest for the first time or need a refresher, we recommend ![]() This tutorial aims to get you up and running with GoogleTest using CMake.
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