Like Autotools, CMake is a widely-used build-script generator. Go to Integrations/CMake if you want to learn how to integrate your project or recipes with CMake. --config Release where /absolute/path/to/libtorchshould be the absolute (!) 1CMakehello_world23 . Note In the following example, non-standard libraries are assumed to be in the folder deps/thirdParty. The system directories that are contained in CMAKE_SYSTEM_PREFIX_PATH are locations that typically include installed software. CMake. Note that Qt Creator will handle this transparently for you. Set the Qt5_DIR in the CMake cache to the location of the Qt5Config.cmake file. In the example above, the zlib/1.2.11@conan/stable package is not packaging a custom FindZLIB.cmake file, but the FindZLIB.cmake included in the CMake installation directory (/Modules) will locate the zlib library from the Conan package because of the CMAKE_PREFIX_PATH used by the FIND_LIBRARY().. Do not forget to set the CMAKE_PREFIX_PATH variable if Eigen is not installed in a default location or if you want to pick a specific version. Also show the exact output that demonstrates that Qt is not being found. An example being /usr/local for UNIX based platforms. Set your CMAKE_PREFIX_PATH environment variable to the Qt 5 installation prefix. Each command will add appropriate subdirectories (like bin, lib, or include) as specified in its own documentation. cmake_paths This is the reference page for cmake_paths generator. For example on Windows, CMake generates Visual Studio project files if a Visual Studio environment is detected. For find_package to perform successfully, CMake should be instructed on where to find the Qt installation. One of the ways to do this is by setting the CMAKE_PREFIX_PATH variable. For a consistent developer experience on all platforms, use the Ninja or Ninja Multi-Config generator. I try to run project that is example of cmake usage for pytorch cuda extension link below [1]. For instance: $ cmake path-to-example-directory -DCMAKE_PREFIX_PATH=$HOME/mypackages CMAKE_PREFIX_PATH Semicolon-separated list of directories specifying installation prefixes to be searched by the find_package () , find_program (), find_library (), find_file (), and find_path () commands. For more details, see CMake AUTOMOC . By setting the environment variable CMAKE_PREFIX_PATH, which is a list of directories (similar to PATH). In addition to standard platform locations, CMake will also add values to CMAKE_SYSTEM_PREFIX_PATH based on environment variables. In addition to standard platform locations, CMake will also add values to CMAKE_SYSTEM_PREFIX_PATH based on environment variables. Unlike Autotools, CMake can generate build scripts for builders other than Make: Ninja, Visual Studio, etc. example-app.cpp We can now run the following commands to build the application from within the example-app/folder: mkdir build cdbuild cmake -DCMAKE_PREFIX_PATH=/absolute/path/to/libtorch .. cmake --build . CMake's default generator depends on the platform and build environment. - Guillaume Racicot Designed by Kitware, CMake is the most popular build system for new C, C++, and Fortran projects, and many older projects are switching to it as well. A file containing only cmake_minimum_required (3.14 REQUIRED) project (test123) message ("$ {CMAKE_PREFIX_PATH}"). It generates a file named conan_paths.cmake and declares these variables: Variables in conan_paths.cmake The environment variables and . if you use the CMake graphical interface, add a new entry CGAL_DIR, or type PATH, and set it to C:\dev\CGAL-5.3, if you use the CMake command line, add -DCGAL_DIR=C:\dev\CGAL-5.3 to the command options. An example being /usr/local for UNIX based platforms. Probably it will be easiest to diagnose this for Linux or MacOS, so please show for one of those two platforms. When I try to run it using this command it gives Open the Toolchains settings ( File > Settings on Windows and Linux, CLion > Preferences on macOS), and go to the CMake settings ( Build, Execution, Deployment > CMake ). For 2., I am surprised that you can compile at all, because in 1. your said you cannot configure CGAL examples using CMake. The specified command is cmake -DCMAKE_BUILD_TYPE=RelWithDebInfo -DCMAKE_PREFIX_PATH=`python -c 'import torch;print (torch.utils.cmake_prefix_path)'` -GNinja .. qt_standard_project_setup() Use this, when an exact library version, or a customized library shall be used. By default this is empty. So, this is what I do to get cmake find all my KDE4 stuff: $ export CMAKE_PREFIX_PATH . If you played with the prefix path or use toolchain file, it could be empty. You can either pass it via -D in the CMake settings dialog or via the set command before find_package. There are different ways you can tell CMake about Qt, but the most common and recommended approach is to set the CMake cache variable CMAKE_PREFIX_PATH to include the Qt 6 installation prefix. Make sure you reproduce that in an otherwise empty CMake file. Example (system libraries not set): Windows Linux path to the unzipped LibTorch CMAKE_PREFIX_PATH works as a build directive, rather than as an environment variable. If the zlib/1.2.11@conan/stable would had included a custom FindZLIB.cmake in the package root . The system directories that are contained in CMAKE_SYSTEM_PREFIX_PATH are locations that typically include installed software. CMake4. For find_package to be successful, CMake must find the Qt installation in one of the following ways:. Here, path-to-example-directory is the path to the directory that contains both CMakeLists.txt and example.cpp. This is the recommended way. In CMake options, add the following line: -DCMAKE_TOOLCHAIN_FILE= [vcpkg root]/scripts/buildsystems/vcpkg.cmake You must add this line to each profile separately. Moreover, you may perform the build into a dedicated temporary directory (it's cleaner, because when done, you can remove that temporary directory and you get back a clean pristine source tree). ; The CMAKE_AUTOMOC setting runs moc automatically when required. If you use a toolchain file, I would advice not setting it back. The prefixes (directories) listed in it will be searched before the default search directories, and lib/, include/ and bin/ will be appended appropriately. CMAKE_MODULE_PATH is for CMake modules, CMAKE_PREFIX_PATH is for installed packages to be found by find_package, for example. For example, in the case of MinGW on Windows: By setting an explicit CMAKE_PREFIX_PATH for a library, it is possible to override the system libraries. Please post the command line you are using to set CMAKE_PREFIX_PATH and show the find_package () calls you are using to find Qt. CMake C++ /. Values to CMAKE_SYSTEM_PREFIX_PATH based on environment variables Release where /absolute/path/to/libtorchshould be the absolute (! the! Command line you are using to set CMAKE_PREFIX_PATH and show the find_package ( calls... ( similar to path ) a consistent developer experience on all platforms, cmake prefix path example the or... Below [ 1 ] is example of CMake usage for pytorch cuda link! 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