Cmake fetchcontent not working The directory that the CMAKE_FIND_PACKAGE_REDIRECTS_DIR variable points to is cleared at the start of every I use FetchContent in my CMakeLists. CMake FetchContent_* does not work with GTest as dependency name. cmake and <name>ConfigVersion. These certificates are used by curl for validating that the server it's communicating with (e. com) is actually github. 0 Problem using FetchContent_Declare together with shared library. txt are executed one by one. m. 1. Now this works nicely as long as the repo is a cmake project with CMakeLists. The CMakeLists. This problem currently hit me in the CMake world. target_link_libraries) are processed at the very end of the I am migrating a codebase that included external projects in its source tree to a FetchContent-based solution. In the master (after that pull request) the function protobuf_generate is defined in the script cmake/protobuf-generate. It seems that content fetching will update the submodules even if GIT_SUBMODULES "" argument is not present under FetchContent_Declare. I’ve managed to achieve this using FetchContent alone, as Parameter SOURCE_DIR of FetchContent_Declare (and of ExternalProject_Add) affects where the downloaded file will be unpacked:. Here’s my little bit of test code: FetchContent_Declare(json11-pkg GIT_REPOSI We recently started to move some of the manual dependent-repo fetching we were doing over to be automatically pulled in via FetchContent. 4. If SOURCE_DIR or BINARY_DIR were not part of the original declared arguments, they will be added with their default values. My attempted steps: built protobuf in Ubuntu 20. Load 7 more related questions Show fewer related questions Sorted by: Reset to default Know someone who can answer? Hello, about two months ago I successfully included raylib with cmake without issues using this template script that was on the wiki/github Hi all, I’m working on a C++ project using CMake, where I manage all my third-party dependencies using FetchContent exclusively (i. txt file of the external lib will have some add_library(ext_lib_name ) statements in it. Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. If the library is not available, I intend to fetch it and compile it using FetchContent. The include and binary files for libbar are obviously present after Thanks for reporting this issue. I control the lib and applications. Code. I am following the guide from this site in Cmake FetchContent googletest not working on windows. <name>_SOURCE_DIR and <name>_BINARY_DIR are properly filled, and calling FetchContent_GetProperties for POPULATED on the target returns 0. #4, no, as far as I know this isn’t possible. The guide is recommended pre But as of cmake 3. See the full documentation here and in particular the first sentence, which states it can deal with projects "via any method supported by the ExternalProject module. That way cmake will build the external lib as a subfolder ("subproject"). ; Do not use add_subdirectory, this is done automatically by FetchContent_MakeAvailable after Overview ¶. – icebp. scp with sshpass does not work (with custom identity file and custom port) Thus the function can be used only with already installed Protobuf, but not with the one included with FetchContent. 20) project (json_test) include (FetchContent) FetchContent_Declare(json URL https: I would like to ask for some guidance on best practices and suggestions on how to handle deps in CMake. 7, is it a deprecated way to find libraries in CMAKE? Greetings, I have to add a 3rd party CMake project to our own one. – FeRD. Manage code changes Discussions. After using FetchContent as described in the However, the reason is most likely that sources are in the QHotkey subfolder. You propably have to pass some extra arguments to tell FetchContent where to find the sources. Thus configuring your project using CMake, it should be able to find_package(GTest) using the usual search procedure. Today however was the first time I’ve tried to configure the project while my PC was not connected to our VPN. FetchContent not working well if used before the first project call It does work well before the first project call for some use cases. From the FetchContent docs: The <contentOptions> can be any of the download, update or patch options that the ExternalProject_Add() command understands. txt with the following contents: It seems the code below is working. 12 Make FetchContent compatible with find_package. After using FetchContent as described in the documentation the catch_discover_tests() function is still not found. h -o main throws no errors. ". 24 added support for integration with find_package() and dependency providers, so it now gives you the ability to try a package manager first, and if that doesn’t supply it, fall back to the download-and-build-from-source details. CMake will then automatically configure and build the external project using its own build system (usually Intellisense not working with CMake FetchContent. 13 via the CMakeFetchContent` module. The CMake script of SDL2_image builds only a shared or static library, not both. 24 it seems possible to implement the following feature within the CMake framework: First, look for a local pre-compiled library in the system or a specific position using CMake find_package tool. Try Teams for free Explore Teams. Since that file was missing curl couldn't validate the identity of The FetchContent_* commands simply fetch content or metadata from a particular external resource, and populate CMake variables; they do not actually perform any configure, build, or install steps. This is I’m currently working on a project where I aim to use find_package() to check if a library is available in the system. Variables like GLM_LIBRARIES or GLM_INCLUDE_DIRS are usually defined by Find scripts (shipped with CMake or with the consumer project). The deprecation is a clear signal that projects relying on FetchContent_Populate() need to migrate. h Class2. Overview ¶. sdbbs sdbbs. Closed HpLightcorner opened this issue Apr 25, 2022 · 1 comment Closed I am trying to use FetchContent to include Catch2 into a CMake project I am working on, but it does not seem to work. I am hitting the following problems: Install directives from the dependency are also added to my project, which causes the dependency libs to be installed. I do this all the time in client projects to bring in a repo that defines common CMake build logic, provides toolchain files, etc. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company CMake FetchContent is a great way to manage build dependencies, by integration the dependency into your build and build it from source along with your own sources. Use git if you want a workaround that doesn't use CMake itself, but since you seem to want this to all happen within CMake only, don't use the git tag. Clone Git Repository using new CMake FetchContent Functionality Loading With CMake, how can we use use FetchContent for two libraries (both CMake projects) libfoo and libbar, with libfoo having libbar as a dependency?. . Follow answered Jan 15 at 15:53. Since some of the dependencies require CMake > 3. So you need to set BUILD_SHARED_LIBS to a false-ish value. I think simply downloading cpr library from Github is not enough, you should build and link cpr against your binary. Commented Jul 4 at 11:05. txt to bring in a git repo I need for my build. URL: If the project is not hosted on Git, you can specify a direct URL to download the source code. SET(CMAKE_BUILD_WITH_INSTALL_RPATH TRUE) SET(CMAKE_INSTALL_RPATH "\${ORIGIN}") Anywhere in your code. All features Documentation GitHub Skills Blog Solutions By company size FetchContent. To learn more, see our tips on writing great answers. To learn more, see our tips on writing great answers . cmake file (or equivalently <name>Config. FetchContent just fetches the dependency and makes it available for further configuration. cmake: Integrating FetchContent with find_package() Hot Network Questions Creative usage of поилка Debian Bookworm always sets `COLUMNS` to be a little less than the actual terminal width How much influence do the below 3 SCOTUS precedents have for Trump voiding birthright New in version 3. The configuration step fails (if I remove the It provides a broader overview of where the FetchContent module fits into the bigger picture, including its relationship to the find_package() command. Based on the description, that find module seems to be providing fmt by pulling it in with FetchContent, which is valid, although I have a git repository with various dependencies distributed over separate branches (some of which take a lot of space). At the moment, it is less suitable if the repo you want to bring in is large because, Hi, I am trying to use FetchContent_Declare to ‘create’ a package I can later use with find_package but haven’t had any luck so far. Also the library tests were causing some issues while building which I didn't investigate further (maybe we can disable them by Hello, I’m looking for some help with FetchContent_Populate. Note also, that documentation for FetchContent clearly states that fetched project is not required to have CMakeLists. If the library is not available, I intend to fetch it and compile it I'm not sure why, but it's failing to download anything through the `fetchContent` tag. cmake script. – Jacob Sánchez. Exception is a variable which is set by the subproject itself, or a URL: If the project is not hosted on Git, you can specify a direct URL to download the source code. @pfriesch I managed to build the example using FetchContent. I call CMake like this cmake -B build/arm64-v8a or cmake -B build/x86 . However, it keeps showing me warnings relative to the wxWidgets files and I do not desire that, since it mixes with my code's warnings, making it hard for me to track them down and resolve them (VS Code showed over First you must build AND install Googletest using CMake build system. 26. The ${CMAKE_BINARY_DIRECTORY} is already something CMake populates with various things, and trying to make it your dependency’s source directory will cause corruption. In your example you didn't link the library and include its headers in your executable. Tested with CMake 3. 3. beach at gmail. version from 3. If FetchContent cannot solve this very straightforward problem, what use does it even have?. Collaborate outside of code Code Search. One way to do it is to directly copy boost source code into our project. It works nicely compared to older approaches but I have one problem which is probably not related to FetchContent itself - external dependencies are downloaded multiple times. Making statements based on opinion; Hello, are there any best practices or patterns how to properly use FetchContent, FeatureSummary and FindPackageName modules? For example, if I want to integrate FeatureSummary with FetchContent there is additional code I want to use FetchContent to automatically manage the dependency to Eigen for my project, which works in general. I have two FetchContent actions to get two repositories. 9. This repository has multiple distinct projects within it but these are all built using a single CMake mega-project. However, the whole history is still downloaded when the option is set to ON, with CMake 3. txt:5 (option): Policy CMP0077 is not set: option() honors normal variables. Unfortunately the . In the case of asio, which is a header-only library it is quite simple, as you just need to tell FetchContent that there is no "configure" and no "build" step. Just give a try. 11+ you can make use of CMake's FetchContent function. According to the documentation, there are several ways to use cpr:. What I have presently works only for system-wide installations:. Expected behavior according to the documentation: When this option is enabled, the git clone operation will be given the --depth 1 option. 24: If a dependency provider is set, call the provider's command with FETCHCONTENT_MAKEAVAILABLE_SERIAL as the first argument, followed by the arguments of the first call to FetchContent_Declare() for <name>. If you’re talking about running multiple Unlike to ExternalProject_Add function, which configures a subproject as a separate CMake project, the FetchContent_MakeAvailable effectively calls. Here's a sum-up: Use FetchContent_Declare and FetchContent_MakeAvailable instead of FetchContent_Populate. Making statements based on opinion; back them up with references or I would like to ask for some guidance on best practices and suggestions on how to handle deps in CMake. Setting it to ${CMAKE_BINARY_DIR} Do not use ${CMAKE_BINARY_DIR} as the SOURCE_DIR. 4-msvc4. However, when I use cmake from the command line, then it works. cmake which starts off like: FetchContent_Declare( fmt GIT_REPOSITORY GIT_TAG 9. Effects for some other commands (e. json since this line does not add an include directory for cpr or link to the library. Thus, any options related to these steps is explicitly ignored when calling FetchContent_Declare(). Config scripts, shipped with the installed package, normally defines IMPORTED targets. I'm trying to test my program by using Catch2 tests and build the application using CMake. github. CMake cannot seem to find the header, even though I've explicitly CMake Warning (dev) at poco/CMakeLists. Collectives cmake --help-module FetchContent produces the The sub-build that FetchContent creates does not use any toolchain file by design. I am developing CMake-based C++ projects for customers that depend on a couple of libraries but wish to provide a clean out-of-the-box experience for the consumers of these projects. Add the following to your CMakeLists. Adding the CONFIG keyword isn’t the solution to this problem. To Hi, I am trying to use FetchContent to build and statically link against a third party dependency in my c++ project. cmake file in the installation directory. Making statements based on opinion; back them up with references or personal experience. 1 Like With DOWNLOAD_COMMAND, I can download it successfully. txt, but your do not want to include it into the main project, then you could set SOURCE_SUBDIR parameter of FetchContent_Declare call to some non-existing directory. I am migrating a codebase that included external projects in its source tree to a FetchContent-based solution. Commented Oct 19, Asking for help, clarification, or responding to other answers. "In the code I'm trying to print all variables starts with "BOOST" but nothing printed. Also you don't appear to be using CMake in VSCode. In this situation there is a lib, and several applications that depend on this lib. Obviously, at the first call of At the top of my main. Use the cmake_policy command to set the policy and suppress this warning. FetchContent_MakeAvailable is effectively add_subdirectory call, so FetchContent-ed project becomes part of the main project. However, when using the recommended method of FetchContent_Declare() and FetchContent_MakeAvailable() a subsequent call to install also installs all Eigen headers and documentation which is not necessary in my case. \mytestapp call hangs. Load 7 more Happy to hear you got it working. I am encouraged by the fact that CMake support for Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company From the FetchContent docs:. It is primarily intended for when you want to use a package manager and force all FetchContent_MakeAvailable() calls to try find_package() with your package manager first, even if the FetchContent_Declare() call didn’t include Hi all, I’m working on a C++ project using CMake, where I manage all my third-party dependencies using FetchContent exclusively (i. I have a common dependent project which builds several beefy projects like gRPC from source. Namely, it If you’re working on an executable project in C++, as opposed to a C++ library, using a package manager to get your dependencies might be overkill: If all you need is to get the source code of a library, include in your CMake project, and have it compiled from source with the rest of your project, CMake’s FetchContent module can do it for you. The project does not explicitly transfer add_custom_target is probably better because it is declaring a target that is convenient to depend on, using add_dependencies. Hot Network Questions On the definition of the stress tensor in two-dimensional CFTs Sum of product of possible strings Can I use bootstrapping for small sample sizes to satisfy the power analysis requirements? Quantum Measurement on Subspace Many open source projects continued to use FetchContent_Populate() long after FetchContent_MakeAvailable() replaced it as the recommended way to populate content. Top. And this would be the most stable way to work with the projects needed for your one. Note the name of my dependency is Dependency1 (with capital D) . I use a combination of FetchContent_Declare and FetchContent_Populate (as outlined in the documentation here), as so far this has worked without any problems for dependencies that CMake-GUI is able to make a Visual Studio solution that works fine if I choose Visual Studio 17 2022 as the generator but this is not ideal because I would like to work with the cmake project directly. I came to the forum looking for information on exactly this scenario–I have several projects that are currently woven together I am limited to a single repository for a work project. 3 Operating System / Platform => Manjaro Linux Compiler => g++/gcc 11. h>. How am I to set cmake configure args for I'm facing some issue building gtest inside my project using FetchContent. That prevented those projects from being handled by dependency providers. txt, which uses "ZeroMQ_FOUND" is causing the issue. before the first project() call. 1 to 10. You may need one target per command, and that becomes quickly annoying. See in particular the mentions of <lowercaseName>_SOURCE_DIR. 5. Learn more Explore Teams. Could you patch your CMakeLists. System information (version) OpenCV => 4. Thanks! – abhijit. tar. cpp file, No such file or directory is thrown at #include <sqlite3. – Cmake FetchContent googletest not working on windows. It's not immediately obvious to me how this relates to any arguments passed to --work-tree in Git, or whether there's any direct connection in the first place, but that's probably what's going on. I circumvented this by using “FetchContent_Populate” and add_subdirectory( Many open source projects continued to use FetchContent_Populate() long after FetchContent_MakeAvailable() replaced it as the recommended way to populate content. create rules which will compile and link the executable). Using target_link_libraries add the names of the target generated by cmake should be sufficient. I am looking to build the library using cmake. I moved the zlib out and in another spot a standard library exception thrown during file lookup started terminating the game. Now, my own CMakeLists. In a separate repository I have a CMake project which utilizes FetchContent to pull specific dependencies from their corresponding branches. It increases project size and add a lot of maintenance problems, patching, updating and etc. Then try to locate the GTestConfig. I looked through the list of CMake FetchContent can deal with non-CMake projects, too. – I'm pretty new to CMake and I'm not sure what changes have to be made to accommodate this. 12 Asking for help, clarification, or responding to other answers. Both are extremely powerful mechanisms. Yet, I found no information on how to tackle this. In target_link_libraries I thought it should take the name that I passed to the FetchContent declaration but its very strange. FetchContent module eventually calls add_subdirectory with the top-level directory of the subproject. Next, you’ll create the CMakeLists. All it is effectively doing in this case is preventing the user’s Findfmt. That includes these options: CONFIGURE_COMMAND; CMake FetchContent Examples are not working "out of the box" on MacOS and Windows when requesting https (SSL) endpoint #730. com> wrote: > I'm upgrading from cmake 3. But it also uses: FetchContent_Declare, to declare dependencies,; FetchContent_Populate, to download dependencies and set I am building a project with Cmake and use FetchContent to manage dependencies. In your case the following should work: Linking to library retrieved with fetchContent - CMake Discourse Loading Nothing changed as you can see from the commit history, the only thing that was changed was the CMake policy max. txt files can run implied goat sacrifice), and I'm not even sure it's possible with FetchContent since it lacks a similar option. taehyounpark asked this question in Q&A. Commented Sep 27, 2021 This Makefile may not work if you use a variable number of CMake variables to build your I am working on a C++ project using CMake, and I manage third-party dependencies via FetchContent. The 3rd party project has several submodules that it adds with ExternalProject_Add. Provide details and share your research! But avoid . The FetchContent module To fetch dependencies on-the-fly at configure-time you will include the built-in CMake module FetchContent. No, CMake is a sequential configuration language: lines in CMakeLists. Also, CMake automatically adds include directories shipped with that target, so call We can set cache path for both methods: FETCHCONTENT_BASE_DIR for FetchContent and CPM_SOURCE_CACHE for CPM. I am encouraged by the fact that CMake support for FetchContent does not work? #4325. Answered by nlohmann. My guess is that line 11 to 25 of cppzmq's CMakeLists. Improve this answer. But by using FetchContent_Populate one can implement any other population logic. If the dependency name is changed to googletest or to foobar everything works as expected. No matter running the same CMake presets from the terminal or configuring the project using the CMake tools extension directly, the prompt which asks for the password for the private repository is displayed. I’ve managed to achieve this using FetchContent alone, as Not sure if this is the proper understanding of how things should work in CMake with FetchContent, but the above worked for me. txt so that cppzmq can go along with FetchContent? Thank you for your help This in-part has been discussed before, though in a very scattered manner, so I wanted to seek clarification of what I’ve come to find here, all in one place. I can call git clone in the same directory and the same shell session successfully and yet cmake's FetchContent will ask for the github login. 12 How to find the source directory of package downloaded via FetchContent? 1 Including opencv with fetchcontent does not work. Setting FETCHCONTENT_FULLY_DISCONNECTED will also disable CPM packages and result The traces are too long to quote, but the last about 100 lines of a 1st run in a clean build dir look like this: I should note that the cmake version I am using is the one that ships with VS and by running cmake --version it prints out cmake version 3. The default behavior of git clone executed by ExternalProject_Add (which is called by There are some other problems with your code, in addition to Corristo's answer. 30, the single arg FetchContent_Populate has been deprecated, instead asking me to use FetchContent_Declare. add_subdirectory(<subproject_source_dir> <binary_dir>) So, when a subproject is configured, it accesses master variables. Previously it was getting caught by a catch block CMake does not generate a "make distclean" target because CMakeLists. ; CMake provides two Why do you expect FetchContent_MakeAvailable(Boost) to create any variable in the current scope? This call is effectively add_subdirectory, which creates its own variables' scope. In this episode, we will discuss the FetchContent module. This is very unfortunate because GTets is used in the find_package command of CMake and if this fails the FetchContent mechanism can be used as fallback. cmake, so that script can be included even in the build tree (after FetchContent): AI features where you work: search, IDE, and chat. Teams. Run "cmake --help-policy CMP0077" for policy details. cmake -G "Visual Studio 15 Win64" . e no other package manager is installed nor run). I would like to do this with Boost, too. While I have future plans to potentially make FetchContent_MakeAvailable() (or some other equivalent new function) be able to process its dependency list in parallel, that doesn’t apply right now. txt file and declare a dependency on GoogleTest. cpp Class1. But not on windows as you can see here: Note, that most CMake projects are designed to be installed and then used via find_package. I use a combination of FetchContent_Declare and FetchContent_Populate (as outlined in the documentation here), as so far this has worked without any problems for dependencies that use find_package(fmt CONFIG ${FMT_VERSION} REQUIRED). Let me give that a shot. Ensure your are NOT setting. Fetch and Configure. It seems that setting FETCHCONTENT-variables will also effect behaviour of CPM. GLM doesn't have a Find script (see FindGLM. I don't know if problem is coming from gtest or from cmake. There are four that I want to move out: zlib, libpng, ogg, and vorbis. However, it also brings in a (large) submodule I don't need for the build. It’s definitely a lot easier when everything’s automatic, but the initial fetching (and Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Let's assume we would like to use boost::file_system library in our cmake multiplatform project (ios, macos, android, windows, linux). – To accomplish that I used CMake's module FetchContent and it currently works properly, resolving the dependency, compiling and running. 04 followed this section of instruction from protobuf github repo C++ Protobuf - Unix, including copy protoc to /usr/local/bin; configure my CMakeList. I’m not clear on what you’re potentially running concurrently. cmake. Everything you In FetchContent declaration I passed name as "dependency1" as I remember "Dependency1" was not working earlier . 13 and 3. I have created a repository that contains two libraries foo and bar. com. If Since CMake 3. I’m not sure if this is an issue with my understanding of the docs or with the tool. Just in case you're interested in knowing why it didn't work, the file missing contains public CA certificates. Find more, search less Explore. – Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company The purpose of the FETCHCONTENT_TRY_FIND_PACKAGE_MODE variable is to provide a global switch for overall behavior. txt defines a bunch of targets, and so does mylib's CMakeLists. Building the code manually by g++ -I"C:\Libraries\64_bit\SQLite3\include\" -L"C:\Libraries\64_bit\SQLite3\bin\" -lsqlite3 main. They define same functions std::string call() but provides different result. Call the FetchContent_Populate() command to trigger the download and extraction of the external project's source code. So, how do I achieve that? cmake's Both FetchContent and find_package are intended to introduce a 3d-party project for use it during the build of main project. I'm running cmake 3. If it is unavailable, download the library from a specific position, e. 0 OVERRIDE_FIND_PACKAGE ) And everything works fine. You’d have to mess with the internals of FetchContent. This may change in the future, as Plan and track work Code Review. FetchContent does not work? cmake_minimum_required (VERSION 3. 15. FetchC Added in version 3. I did not know FetchContent could be used this way. 12 I am using my own installation of CMake. This will make it expect the libraries in the same folder as the program. I'm actually building for Android platform but that doesn't matter much. For compatibility with older versions of CMake, option is clearing the normal variable 'POCO_STATIC'. Last line of output to the command line is:-- Detecting CXX compile features - done Below is a minimal working example that replicates the issue: cmake_minimum_required and/or does not use CMake and needs custom scripting, then FetchContent will not perform cmake configure/build on that directory. Everything works fine. The program works and the application gets build when the Catch2 If the find_package command is not working in your setup, you may need to check how you If you don't want to do that you can use FetchContent as described here. I want to use Populate to pull and extract a . Most projects doesn't describe the ability of being included as a subproject, but this could work. It uses your suggestion of setting HIGHS_SOURCE_DIR (BTW, the project I am modifying, which was managing dependencies via git submodules, was already doing that). CMAKE_BUILD_TYPE or custom flags. 1 and am trying to understand the new > FetchContent I use CMake FetchContent to download nlohmann/json. txt. Explore Teams. My investigation Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Hi everybody, I’ve recently started using the methods around FetchContent_Declare to pull my external project components (Git, SVN) to my current CMake project and it works great so far. If you already have a CMake project you need to integrate C++ Requests with, the primary way is to use fetch_content. My repo has a Findfmt. The CMake execution is (currently) inherently single threaded. ; The first argument for both functions is <name> and must be identical. The FetchContent_Declare() function records the options that describe how to populate the specified content. txt at all. If you’re a library writer, I’m currently working on a project where I aim to use find_package() to check if a library is available in the system. If I were to install mylib, then find_package(mylib), I would only get its exported targets, and even those would be prefixed cd "c:\Users\maste\Desktop\CmakeProject1\" && g++ main. CMake FetchContent does not copy libraries. cmake module from being used. Which CMP do you think can cause this, only one I see is CMP170 but it talks about the FETCHCONTENT_FULLY_DISCONNECTED and not In our case we are downloading libraries with FetchContent and than use for example find_package to make them available. So now you can add this path to the CMAKE_PREFIX_PATH variable. Cmake. I struggle finding a uniform approach that does not involve a lot of OS-specific operations. There are many ways to express dependencies in the CMake ecosystem; in this quickstart, you’ll use the FetchContent CMake module. At best, I guess it could be because there's no git ssh key, although that doesn't make sense because I am trying to use FetchContent to include Catch2 into a CMake project I am working on, but it does not seem to work. The documentation appears to be here. scott (Craig Scott) March 7, 2024, 9:08pm 2. This CMake project includes a number of libraries which it retrieves using FetchContent. g. 24: Ensure the CMAKE_FIND_PACKAGE_REDIRECTS_DIR directory contains a <lowercaseName>-config. 30, I always want to use all the new CMake policies to make sure I’m compatible. Share. Like many other projects, this has dependencies. Here's my code to fetch my dependency This script is shipped with CMake. That way, CMake not only automatically deduces path to the library file, but also adjusts needed build dependencies. Basically, rather than using Git submodules, we chose to use FetchContent. I'm currently working on a CMake project that uses Jenkins for its continuous integration. It’s worth noting that it looks like Microsoft is back to shipping its own customised version of CMake again . Our workflow does currently not include manual adjusting of CMake Options/Variables and we do not want to add that. cmake not in glm 0. Whereas ExternalProject_Add() downloads at build time, the FetchContent module makes content available immediately, allowing the configure step to use the content in commands like add_subdirectory(), include() or file() operations. If such details have already been recorded earlier in this project (regardless of where in the project hierarchy), this and all later calls for the same content are ignored. Asking for help, clarification, or responding to other answers. If the external lib builds with cmake then you could add the lib to your build via a add_subdirectory(${libname_SOURCE_DIR}) call. So instead I would try (I did not) writing a script performing the build, let's call it build-boost. Making FETCHCONTENT_BASE_DIR work with a global cache would make this process much more time and space efficient. CMake gets all needed options by the IDEs we use, e. Today we try to repro this issue using a simple CMake project, but we didn't repro it. I want to use one of them in different project. 5,364 7 7 gold badges 56 I am upgrading my version of {fmt} from 9. Each project is handled separately and are not inherently part of the same source tree. Sub-solution 1. It’s an well-delimited change to an existing CMake build system. SOURCE_DIR <dir> Source directory into which downloaded contents will be unpacked, or for non-URL download methods, the directory in which the repository should be checked out, cloned, etc. This means, that git clone, configure, build should succeed without end users No, you cannot tell CMake to not reconfigure a project added via FetchContent when the main project is modified. Ask questions, find answers and collaborate at work with Stack Overflow for Teams. " - You manually create variables BOOST_INCLUDE_LIBRARIES and BOOST_ENABLE_CMAKE, External lib builds with cmake. txt as below: If this behavior depends only on the CMake version, not on the Git version, it's not a Git issue and doesn't need git. If you don't like this then ExternalProject_Add seems to be a reasonable solution. FetchContent_MakeAvailable: The simpler, and often preferred approach; FetchContent_GetProperties and FetchContent_Populate: An approach offering more precise control, allowing custom variables/policies; Whichever Just as an update to @Patricia's comment in the accepted answer and @Fraser's comment for the original question, if you have access to CMake 3. So apparently, the cmake in Visual Studio does things a You can handle dependencies that do not use CMake. Anthony A: I CMake FetchContent is a great way to manage build dependencies, by integration the dependency into your build and build it from source along with your own sources. However, these two approaches uses different mechanisms: FetchContent builds the 3d-party project from sources, alongside with the main one, but; find_package works with already installed 3d-party project. If your fetched project contains top-level CMakeLists. Previously it was getting caught by a catch block In target_link_libraries it is better to specify not a library name ("jsoncpp" in your case), but the library target created in the subproject. FetchContent with Boost - Code - CMake Discourse Loading I create an issue on SLD_Image repository, and they give the following answer, that actually work. 12. This module enables populating content at configure time via any method supported by the ExternalProject module. However, if I simply change GIT_TAG to be 10. But I cannot find a way to extract it since both CONFIGURE_COMMAND and BUILD_COMMAND are all disabled for FetchContent, and I’m not sure if UPDATE_COMMAND or PATCH_COMMAND is for this kind of situation. This does not work for me when I use Visual Studio 2022. Foll I am facing the following problem: I am trying to use the CMake function FetchContent_Declare to fetch Qt C++ library and in particular the version 6. 2 from Arch, and when using FetchContent_Populate, the variable <name>_POPULATED is not filled. CMake will then automatically configure and build the external project using its own build system (usually I think you might be out of luck. CMAKE_ARGS, CONFIGURE_COMMAND). Notice how configure and build options are not on that list (Ex. This looks fantastic, yet Hey everyone, I’ve been having some issues with my cmake script. 17. Specifically with the ExternalProject_Add function, it seems like it is not being executed or rather it is being executed but the problem is that it is not cloning the github repository, the dirs are being created but they are empty and no logs seem to be generated. The FetchContent_Declare is working On Sat, Mar 23, 2019 at 1:58 PM Jason Beach <jason. Problem: The submodules use find_package extensively and apparently the CMAKE_FIND_ROOT_PATH variable is not transferred to the submodule by ExternalProject_Add. com and not someone else pretending to be github. cpp -o main && "c:\Users\maste\Desktop\CmakeProject1\"main your bug appears to be in your tasks. Hence I wrote the follow This should work (I think), but it fails with "CMake libzmq package not found". cmake and a <lowercaseName>-config-version. craig. FetchContent_MakeAvailable performs add_subdirectory call only when source directory of the fetched project actually contains CMakeLists. CMake's FetchContent page uses googletest as an example! I've provided a small modification of the accepted answer: CMake 3. You can specify a subdirectory below ${CMAKE_BINARY_DIRECTORY} though (and I do this in some projects). cmake). gz archive from our int CMake FetchContent_* does not work with GTest as dependency name. Im trying to download and setup Qt5 version 5. If you want to build external project once, then use ExternalProject_Add. 29 to 3. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company FetchContent not working well if used before the first project call It does work well before the first project call for some use cases. File metadata and controls. Everything you could My goal is to configure cmake file and build my app with protobuf lib. Some commands (like add_executable) have deferred effects of declaring things for a build time (e. 0, my build breaks in very strange ways (I get issues with several other targets that The only function from FetchContent module which does that is FetchContent_MakeAvailable. The bookkeeping used by FetchContent does not expect such configuration changes to happen for any given sub-build, and thus it does not currently support the behaviour I outlined in my original post. I am vaguely tempted to glue together the 3 following approaches, but I am still surprised/concerned/unsure a more elegant solution does not exist. At the moment, it is less suitable if the repo you want to bring in is large because, Suppose I'm writing an app, and managing its build with CMake; and I also want to use a library, mylib, via the FetchContent mechanism. 2. One repo works fine with the SourceDir populated. 4 CMake's FetchContent with Makefile-built dependency. cpp Class2. And manually check if the dir|contents exists as expected and force a re-download (by removing the subbuild) if not. github or some other repositories, build it, and provide the target. . sh: #!/bin/bash # This is meant to be run from the source directory of Boost. The gymnastics involved in maintaining this setup have become unbearable and my proposal to break things into separate repos and manage dependencies with FetchContent was un Fetchcontent is great, but it has the unwanted side-effect that your workspace becomes cluttered by all targets of your dependency. 0 Detailed description I tried to link OpenCV with cmake FetchContent, but it seems as the include The FetchContent module provides primary two approaches for populating the content of the external package in your main CMake build:. So you just have to use I’m currently working on a project where I aim to use find_package() to check if a library is available in the system. CMake FetchContent Does Not Populate Name in '*_SOURCE_DIR' Ask Question Asked 10 months ago. To do this, in your project directory (my_project), create a file named CMakeLists. If a subproject is not ready for such inclusion, then this inclusion will fail. This means, that git clone, configure, build should succeed without end users I am looking to automate the compilation of a given c++ library (in this case, cpprestsdk). FetchContent_MakeAvailable(botan) does not really do the job, the build doesnt run since its not a cmake project. This warning is for It works nicely when invoking CMake from commandline with --toolchain option, but when trying to achieve the same thing using presets it fails The problem can be solved by defining SUBBUILD_DIR in call to FetchContent_Declare. xjpke bcqjf pbtd oel cae zjdkyt ycv lbnid swxstn uhc