qt_standard_project_setup() 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().. - Guillaume Racicot Note In the following example, non-standard libraries are assumed to be in the folder deps/thirdParty. 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. The prefixes (directories) listed in it will be searched before the default search directories, and lib/, include/ and bin/ will be appended appropriately. When I try to run it using this command it gives CMake. An example being /usr/local for UNIX based platforms. 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. Like Autotools, CMake is a widely-used build-script generator. Example (system libraries not set): Windows Linux By setting an explicit CMAKE_PREFIX_PATH for a library, it is possible to override the system libraries. If the zlib/1.2.11@conan/stable would had included a custom FindZLIB.cmake in the package root . For 2., I am surprised that you can compile at all, because in 1. your said you cannot configure CGAL examples using CMake. In addition to standard platform locations, CMake will also add values to CMAKE_SYSTEM_PREFIX_PATH based on environment variables. Each command will add appropriate subdirectories (like bin, lib, or include) as specified in its own documentation. Go to Integrations/CMake if you want to learn how to integrate your project or recipes with CMake. By default this is empty. 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. Set your CMAKE_PREFIX_PATH environment variable to the Qt 5 installation prefix. CMAKE_PREFIX_PATH works as a build directive, rather than as an environment variable. It generates a file named conan_paths.cmake and declares these variables: Variables in conan_paths.cmake --config Release where /absolute/path/to/libtorchshould be the absolute (!) Here, path-to-example-directory is the path to the directory that contains both CMakeLists.txt and example.cpp. CMAKE_MODULE_PATH is for CMake modules, CMAKE_PREFIX_PATH is for installed packages to be found by find_package, for example. Also show the exact output that demonstrates that Qt is not being found. One of the ways to do this is by setting the CMAKE_PREFIX_PATH variable. 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). 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 . For instance: $ cmake path-to-example-directory -DCMAKE_PREFIX_PATH=$HOME/mypackages 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++ /. 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. Open the Toolchains settings ( File > Settings on Windows and Linux, CLion > Preferences on macOS), and go to the CMake settings ( Build, Execution, Deployment > CMake ). So, this is what I do to get cmake find all my KDE4 stuff: $ export CMAKE_PREFIX_PATH . path to the unzipped LibTorch 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. This is the recommended way. In addition to standard platform locations, CMake will also add values to CMAKE_SYSTEM_PREFIX_PATH based on environment variables. For a consistent developer experience on all platforms, use the Ninja or Ninja Multi-Config generator. An example being /usr/local for UNIX based platforms. 1CMakehello_world23 . The system directories that are contained in CMAKE_SYSTEM_PREFIX_PATH are locations that typically include installed software. A file containing only cmake_minimum_required (3.14 REQUIRED) project (test123) message ("$ {CMAKE_PREFIX_PATH}"). If you use a toolchain file, I would advice not setting it back. For example, in the case of MinGW on Windows: 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. The environment variables and . For find_package to perform successfully, CMake should be instructed on where to find the Qt installation. Unlike Autotools, CMake can generate build scripts for builders other than Make: Ninja, Visual Studio, etc. Probably it will be easiest to diagnose this for Linux or MacOS, so please show for one of those two platforms. ; The CMAKE_AUTOMOC setting runs moc automatically when required. Make sure you reproduce that in an otherwise empty CMake file. 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. 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. The specified command is cmake -DCMAKE_BUILD_TYPE=RelWithDebInfo -DCMAKE_PREFIX_PATH=`python -c 'import torch;print (torch.utils.cmake_prefix_path)'` -GNinja .. CMake4. CMake's default generator depends on the platform and build environment. Use this, when an exact library version, or a customized library shall be used. By setting the environment variable CMAKE_PREFIX_PATH, which is a list of directories (similar to PATH). For find_package to be successful, CMake must find the Qt installation in one of the following ways:. For more details, see CMake AUTOMOC . I try to run project that is example of cmake usage for pytorch cuda extension link below [1]. 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. The system directories that are contained in CMAKE_SYSTEM_PREFIX_PATH are locations that typically include installed software. Kde4 stuff: $ export CMAKE_PREFIX_PATH [ vcpkg root ] /scripts/buildsystems/vcpkg.cmake you must add line. 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