conan cmake_find_package

We can use it with modern CMake target approach. You will find the generated FindXXX.cmake scripts for the cmake find_package feature there. We suggest the CONAN_INCLUDE_DIRS_XXX. Result variables¶. The benefit of these generators is consistency: the target names for dependencies (for example, ApprovalTests::ApprovalTests) are generally the same as you would get if building against the library . where the generated Find.cmake is. All available boost packages will be listed. I will absolutely play with this pluggin. 1. After finding the library, it will automatically add includers, links, linkdirs and other related settings. This cmake module allows to launch conan install from cmake.. The CMake find_library function will be able to locate the libraries in the package’s folders. cmake_paths generator to adjust the CMAKE_MODULE_PATH and CMAKE_PREFIX_PATH variables automatically We recommend copying the original FindXXX.cmake file from Kitware (folder Modules/FindXXX.cmake), if available, and modifying it to help find our library files, but it depends a lot; maybe you are interested in creating a new one. © Copyright 2016-2020, JFrog. # This small hack might be useful to guarantee proper /MT /MD linkage. 现代 CMake 使用 C++ 依赖项时已经相对方便了。比如 find_package(OpenSSL 1.0 REQUIRED) 就可以自动在本地机器上查找已安装的与 OpenSSL 1.0 兼容的包，然后就可以直接 target_link_libraries(targetName PRIVATE OpenSSL::SSL) 使用，不必再手动写头文件和库文件配置。 This module will set the following variables in your project: GTest_FOUND Create a file named FindXXX.cmake and save it in your Conan package root folder, where XXX is the name of the library that we will use in the find_package CMake function. Anyway, both tools are fairly straightforward to install and get started. For example, we create a FindZLIB.cmake and use find_package (ZLIB) . sudo cmake --build . So this generator can be very helpful when no standard "Find<Package_name>.cmake exists. There are plenty of them for most popular libraries, however, many are still missing, and OpenEXR is one of them. That would make things so much easier. The example above is using the Conan cmake_find_package generator which is less intrusive than the cmake generator and more aligned with the direction Conan is taking for the 2.0 version. You can also change the remote location if you want. Notes GTest::Main. The place to find and share popular C/C++ Conan packages . A safe and fast alternative to printf and IOStreams. Generated files¶. cmake-init is therefore a collection of cmake best-practices. CMake wrapper for the Conan C and C++ package manager. Sometimes the “official” CMake FindXXX.cmake scripts are not ready to find our libraries (unsupported library names for specific settings, fixed installation directories like C:\OpenSSL, etc.) Could not find a package configuration file provided by "spdlog" with any of the following names: spdlogConfig.cmake spdlog-config.cmake More details The problem seems to be that in the spdlog conan recipe, some directories are removed in the package step (and one of these folders is the CMake one). cmake_find_mode: Use it to make CMakeDeps generate FindXXX.cmake module files, config CMake scripts, both of them or none. If you are using Outcome in a CMake project, Outcome is a "modular cmake" project using only modern cmake 3 throughout. It's flexible, addresses the hard problems of C/C++ package management head-on, and is backed by a fantastic set of developers. Let's say you use a plain conanfile.txt: # conanfile.txt [requires] gtest/1.10.0 [generators] cmake This all works nicely. See the cmake-packages(7) manual for details on the user package registry. conan search <package-name> --remote=conan-center. Last updated on Oct 05, 2021. GitHub Gist: instantly share code, notes, and snippets. This is where package recipes and binary packages are stored and cached, so they don't have to be retrieved again. The branches in this repo are: develop: PR are merged to this branch.Latest state of development cmake 939,804 Downloads BSL-1.0 License 1.77.0 Version boost 416,042 Downloads MIT License 1.84.2 . patching for OpenEXR. The Bincrafters package for gtest is marked as obsolete, you should use the one in the conan center. My journey to figuring this out is written up here. For the protobuf library case, this generator hide a very important feature : the protobuf_generate_cpp function. (Folder cmake_find . Now I'm trying to create conan recipes (it is working without problems with pure CMake). Conan Docker Tools - Official docker images for creating C++ packages for ConanCenter. One of the issues I had with CMake on Windows was that CMake's find_package() was finding an older version of Boost that I had around. Prefer to use an agnostic CMakeLists (usuall calls to find_package() , no specific stuff from vcpkg or conan), and inject dependencies through cmake_find_package & cmake_find_package_multi (eventually pkg_config also) conan generators. Without cmake_paths, adjusting the variables manually: Check the section cmake_find_package to read more about this generator and the adjusted CMake Conan package for ComputeCpp. Below are some key tools involved: Make. The following command both runs all the steps of the conan file, and publishes the package to the local system cache. I will absolutely play with this pluggin. The Bincrafters package for gtest is marked as obsolete, you should use the one in the conan center. Since the cmake_find_package_multi generator, creates for you the XXXConfig.cmake files with the targets, you just need to specify the generator in your recipe/project and use the find_package feature to use the target, knowing that the target is complete and always managing Conan dependencies. © Copyright 2016-2020, JFrog. This repository contains a recipe for repackaging ComputeCpp as a conan package together with a set of CMake modules that allow the use SYCL without any usage of macros. The cmake_find_package generator creates a file for each requirement specified in the conanfile. Typically, the way to do this is to use this code which is automatically generated by conan new: fix-conan-cmake-could-not-find-openssl.txt Copy to clipboard ⇓ Download. here is a post here comparing the 2. 8 months ago. Variables CMAKE_INCLUDE_PATH and CMAKE_LIBRARY_PATH are set with the requirements paths. CMake uses so-called find-modules to locate various libraries. Turns out reading the manual is helpful and cmake_findboost_modular is the way to get just sub modules of Boost. For example, we create a FindZLIB.cmake and use find_package (ZLIB) . Conan won't do it automatically, thus, you need to add the generator conan_find_package in your list, which will provide the Findxxx.cmake files for your build: generators = "cmake", "cmake_find_package" What does cmake generator do? This cmake module allows to launch conan install from cmake.. Let's say you use a plain conanfile.txt: # conanfile.txt [requires] gtest/1.10.0 [generators] cmake This seems to be a deliberate choice in the recipe (no cmake_find_package generator) but is fairly inconvenient. 1. 1y. a FindZLIB.cmake file will be generated. It's probably worth noting, that this really depends on how the . This can lead to problems in calling code that expects `find_package` result variables (e.g., `_FOUND`) to follow a certain pattern. GTest::GTest. Make runs commands defined in a Makefile, for example, to build and install programs with the compiler and linker.For our purposes, we won't worry about what this looks like; you only need to understand its purpose in relation to CMake. 1. For each conan package in your graph, it will generate 2 files and 1 more per different build_type.Being <PKG-NAME> the package name used in the reference (by default) or the one declared in cpp_info.name or in cpp_info.names["cmake_find_package_multi"] if specified: Version 8.0.1 of the fmt package. Conan has an abstraction over the packages build system and description by using generators. Create a file named FindXXX.cmake and save it in your Conan package root folder, where XXX is the name of the library that we will use in the find_package CMake function. This is the reference page for cmake_find_package generator. "This is a warm and reassuring book that will equip you to read, understand, and update legacy code in any language. Last updated on Oct 05, 2021. 使用 Conan 管理 C++ 依赖. Conan has been a lifesaver in managing cross-platform packages for Imageflow. You can inspect the local cache with conan search, and remove packages from it with conan remove command. We are working on a new feature, components (hopefully ready for the next release), to be able to provide more flexibility, and let the consumer use just one library from a multi-component library (like Boost). If you navigate to the folders referenced in conanbuildinfo.cmake you will find the headers and libraries for each package. Package Management in C++ with Conan for Beginners. So for the zlib/1.2.11 package, If a recipe uses components, the targets generated will be :: with the following properties adjusted: Moreover, a global target :: will be declared with the following properties adjusted: Name conflicts: If the name of the global target is the same for different packages, Conan will aggregate into this global target This generator is especially useful if you are using CMake using the find_package feature to locate the dependencies.. Issues packaging a library using "exports_sources" - conan. As they are used from Conan packages, there is no point to build them from the source in the context of OpenCV. in your CMakeLists.txt file you only need to find_package(A) and find_package(B). 1. Hunter is easier to get going but is specific to CMake. So, if your project depends on a packages A and B, and at the same time The name of the files follow the pattern Find<PKG-NAME>.cmake. Errormessage from CMake. However, with the cmake_find_package generator, using Conan is more transparent. Where XXX is the name of the library that we will use in the find_package CMake function. For example, we create a FindZLIB.cmake and use find_package(ZLIB). For a uniform distribution of packages to be possible, Conan needs an infrastructure that allows a homogeneous environment for the construction of packages. It seems the "build_folder" is not yet defined by conan by the time configure () is run, and thus the CMake cache variables are not set. Nov 13, 2019. . This will search for the package on your local computer and if it doesn't find it, it will look for it in a remote location, in this case, conan-center. conan vs Ncurses. Conan Conan is a dependency manager for C++ in the spirit of Python's pip. The name of the files follows the pattern Find.cmake. --target install Modular CMake build support. The name of the files follow the pattern Find.cmake. Each of them has its purpose, but usually you will use either conanfile.txt or CMake wrapper. Conan won't do it automatically, thus, you need to add the generator conan_find_package in your list, which will provide the Findxxx.cmake files for your build: generators = "cmake", "cmake_find_package" What does cmake generator do? Cookies Settings, Containing all the include directories of the package, List of CMake module files with functionalities for consumers. This example use Conan's cmake_find_package generator, and optionally also the cmake_paths generator. New CMake Integration Enhancements In these cases we can provide a custom FindXXX.cmake file in our Conan packages. It creates the file conanbuildinfo.cmake which contains all information required to build your package. $ conan install . However, with the cmake_find_package generator, using Conan is more transparent. conan vs Boost.Program_options. Conan has all the information, it makes no sense . This guide does not aim to teach you how to program (see Stroustrup’s Programming: Principles and Practice Using C++ for that); nor will it be the only resource you’ll need for C++ mastery (see Stroustrup’s The C++ Programming ... cmake-conan. As I was looking around for how to tell find_package() to get the correct version I stumbled across cmake_findboost_modular. In these cases we can provide a custom FindXXX.cmake file in our Conan packages. Or maybe there is no “official” CMake script for our library. cmake-conan - CMake wrapper for conan C and C++ package manager Onion - C library to create simple HTTP servers and Web Applications. For the interested reader: have a look at the build directory after running the conan install commands. 1. Or you can also adjust CMAKE_MODULE_PATH and CMAKE_PREFIX_PATH manually. The cmake_find_package generator creates a file for each requirement specified in the conanfile. So for the asio/1.14.0 package, The name of the files follows the pattern Find<package_name>.cmake.So for the zlib/1.2.11@conan/stable package, a Findzlib.cmake file will be . Current good practice is to use cmake_find_package generator. Conan 1.36 brings several significant enhancements, including several different enhancements to CMake integration, a new property strategy for certain values in the cpp_info data structure, a first-class mechanism for testing packages which are used as build_requires, and the ability to exclude specific packages from Conan builds. For example, we create a FindZLIB.cmake and use find_package (ZLIB) . Cookies Settings, # it will find the packages by using our auto-generated FindXXX.cmake files, -- Conan: Using autogenerated FindZLIB.cmake, -- Found: /Users/user/.conan/data/zlib/1.2.11/_/_/package/0eaf3bfbc94fb6d2c8f230d052d75c6c1a57a4ce/lib/libz.a, '72bce3af445a371b892525bc8701d96c568ead8b'. and let CMake locate the generated Find.cmake files. CMake wrapper for the Conan C and C++ package manager. This solution has always been thought of since the beginning of the project and has taken on a large . Those generators translate the information of the dependency graph and create a suitable file that can be consumed by your build system. Conan packages can be installed in at least three different ways: manually, automatically with conanfile.txt, automatically with CMake wrapper. Being the package name used in the reference (by default) or the one declared in cpp_info.name or in cmake_module_file_name, cmake_module_target_name . -g cmake_find_package_multi -s build_type = Release These commands will generate several files for each dependency in your graph, including a <package_name>Config.cmake or <package_name>-config.cmake that can be located by the CMake find_package . As I did not want to modify my CMakeLists.txt to keep package management separated from the build process, I thought that the cmake_find_package generator would be the way to go, but the resulting Find Package .cmake file for package A results in B trying . Projects dependencies are listed in a conanfile.txt file and are downloaded/built using the conan command. Could not find a package configuration file provided by "Catch2" with any of the following names: Catch2Config.cmake catch2-config.cmake Content of conan_paths.cmake (replaced home with ~) About the Book C++ Concurrency in Action, Second Edition is the definitive guide to writing elegant multithreaded applications in C++. For that, simply add the conan recipe to the conanfile.txt/py. Continuing with the list of new CMake generators for transparent integration, we introduce the cmake_find_package_multi generator to achieve multi-configuration of packages in Release/Debug modes. A depends on C, the A target will contain automatically the properties of the C dependency, so you), there are a lot of duplicates of built-in variables (e.g. CMake configure step should be as fast as possible, and an open source project should be package manager friendly. The branches in this repo are: develop: PR are merged to this branch.Latest state of development Then repeat for the library names with CONAN_LIBS_XXX and the paths where the libs are CONAN_LIB_DIRS_XXX. © Copyright 2016-2020, JFrog. Thus, to generate a recipe, we'll have to employ a few different techniques together: The cmake_find_package is a different approach. While the CMake scripts seem to work fine, they are doing unnecessarily too much in the consumer code path (e.g. In the past, we have found that the logic of some of the CMake's find/config or pkg-config files can lead to broken . A target named :: target is generated with the following properties adjusted: The targets are transitive. C++ package management can be complicated. Right now it is not possible using this generator. If you want to continue using the cmake generator with conan_cmake_configure, . cmake-init is a sophisticated copy & paste template for modern C and C++ projects. tons of options are defined that are of interest only to a developer, i.e. I tried Conan a year or so ago and wasn't very happy with it because I didn't like the idea of having to incorporate "Conan commands" in my CMakeLists.txt. Package and En. Conan integrates in any build system and is very general and can support multiple use cases. For the components themselves, a name conflict will result in one of them being inaccessible without further notice. cpp_info.names["cmake_find_package"] if specified: This file uses _BUILD_MODULES values to include the files using the include(…) CMake directive after the targets are As every target is transitive, libcurl target will contain the OpenSSL and zlib information too. Moreover, this also adjusts CMAKE_MODULE_PATH and CMAKE_PREFIX_PATH to the values declared by the package in cpp_info.buildirs, so First to answer your question. So in these cases we can provide a custom FindXXX.cmake file in our conan packages. Original Poster. The cmake_paths generator will produce 'conan_paths.cmake' to your working directory, include it in your CMake project If you have a qmake based consuming project for theAdditional Library you can pass -g qmake -generator which will create ' conanbu ildinfo.pri ' file which you can include in your qmake project. This means that this global target will contain information coming from different Conan 1.20: Reuse CMake macros, system libraries support, Compatible packages and new recipe methods! Note: The files in this section can be viewed and downloaded from conan_cmake_find_package. Maybe I'm using Conan completely wrong, but I think they should include the exported CMake targets in the packages. Create a file named FindXXX.cmake and save it in your Conan package root folder, where XXX is the name of the library that we will use in the find_package CMake function. plugging my own teaport here. cmake_find_package generator¶. Go to Integrations/CMake if you want to learn how to integrate your project or recipes with CMake. In any case, I agree with Alex, it is better to use cmake_find_package generator, or if want to live on the edge the new CMakeDeps experimental one. Search cmake variables defined in the Platform files for the current . - created. conan_basic_setup() will add all required package paths to your CMAKE_MODULE_PATH, which you can use to include() some bundled CMake scripts that will either let you execute the protobuf-compiler via a target or run protobuf_generate to automagically handle the preprocessing. SMALL_VERSION and SMALL_ROOT_DIR when small_VERSION and small_SOURCE_DIR are already set by project) and you . packages. Last updated on Oct 05, 2021. # in MSVC if the packaged project doesn't have variables to set it. And sadly, the conanfile.cmake do not expose the installed version as CMake variable, so I cannot check is the version sent to find_package was the correct one. This book introduces the concept of generic components-reusable design templates that produce boilerplate code for compiler consumption-all within C++. This makes functions or utilities exported by the package available for consumers just by setting find_package() in the Take a look at this example with the ZLIB library: In the first line we find the path where the headers should be found. If you want to continue using the cmake generator with conan_cmake_configure, . For this reason, I will assume that our project is following the advice in my previous post for non-intrusively integrating CMake with Conan for dependency management: we have a conanfile.txt and use the Conan generators cmake_find_package and cmake_paths. This includes downloading dependencies from "build_requires" and "requires" , and then running the build() method. From type definition to error handling, this book presents C++ best practices, including some that have only recently been identified and standardized-techniques you may not know even if you've used C++ for years. Installing packages. Cookies Settings. cmake_find_package. Please consider using cmake-init. I'm trying to create a package from a CMake project with the following structure: CMakeLists.txt <-- uses cmake-conan to run conan and install the gtest dependency conanfile.py include/ MyProject/ <headers> src/ CMakeLists.txt <-- Builds the sources <sources> test/ CMakeLists.txt . This generator is especially useful if you are using CMake using the find_package feature to locate the dependencies.. cmake-conan. This book will provide you with practical recipes to manage the build system using CMake. In other words, if your dev environment already has CMake and C++ compilers, you may find it easier to install Vcpkg compared to Conan. feature: If you are using a conanfile.txt file in your project, instead of a conanfile.py, this generator can be used together with the The cmake_find_package generator creates a file for each requirement specified in a conanfile. This is because you typically what to automate dependency installation while you are . In addition to automatic find_package support, CMAKE_MODULE_PATH variable is set with the requirements root package paths. For that, simply add the conan recipe to the conanfile.txt/py. Outcome fully complies with cmake install, so by installing Outcome, it can be found by cmake's find_package(). cmake_find_package generator¶. If a FindXXX.cmake file for the library you are packaging is already available, it should work automatically. It will generate one find<package_name>.cmake for each dependency from the information that Conan has about the dependency tree. This example use Conan's cmake_find_package generator, and optionally also the cmake_paths generator. The name of the files follows the pattern Find<package_name>.cmake.So for the zlib/1.2.11 package, a FindZLIB.cmake file will be generated. If it’s not provided, you can create a basic one. Conan Recipe and SYCL as a CMake Language for ComputeCpp. Note: The files in this section can be viewed and downloaded from conan_cmake_find_package. In conclusion, Conan has more installation dependencies than Vcpkg. In the previous example, the CMake build helper will automatically adjust the CMAKE_MODULE_PATH to the conanfile.install_folder, New cmake_find_package_multi generator. Cmake built binary can't find Conan downloaded libraries - Macos 28th September 2021 c++ , cmake , conan , macos , macos-big-sur I try to build a binary from Cmake with Conan downloaded libraries, but when i try to run the bin, it can't find the libraries installed by Conan. Sublime-CMakeLists - Sublime Text 2/3 - CMake Package conan vs Vcpkg. Xmake also supports the interface similar to cmake's find_package to directly find the system library, and then integrate it. Cmake conan C++ project example. I tried Conan a year or so ago and wasn't very happy with it because I didn't like the idea of having to incorporate "Conan commands" in my CMakeLists.txt. This generator is especially useful if you are using CMake using the find_package You'll see this in my Conan.cmake and it immediately resolved the issue with . The Google Test gtest_main library, if found. I can see my CMake definitions if I run "conan build ..", but not when I run (my preference) "conan install .. && cmake ..". find_package(fmt) doesn&#39;t work with the fmtlib from conan-center. It creates the file conanbuildinfo.cmake which contains all information required to build your package. modules in those directories can be found. This can be skipped if NO_CMAKE_PACKAGE_REGISTRY is passed or by setting the variable CMAKE_FIND_USE_PACKAGE_REGISTRY to FALSE or the deprecated variable CMAKE_FIND_PACKAGE_NO_PACKAGE_REGISTRY to TRUE. Those build modules will be included in the find and config files generated by the cmake_find_package and cmake_find_package_multi generators so they can be used transparently like this: cmake_minimum_required(VERSION 2.8.12 . The package name passed to `find_package_handle_standard_args` (jack) does not match the name of the calling package (Jack). It can take the values: module, config, both and none.The none option can be convenient if you want to make a package that wraps system libraries, and the consumers should find the config files in the CMake config path. It has support for binary packages, versioning, dependencies and is build system agnostic (it has integrations for the more popular build systems) .