Cmake fetchcontent not working. CMake gets all needed options by the IDEs we use, e.

Cmake fetchcontent not working 1 and am trying to understand the new > FetchContent At the same tile still left the option to download during calling cmake for other users. Thus configuring your project using CMake, it should be able to find_package(GTest) using the usual search procedure. What is the best way to have the same variables in repo1 CMake files as in repo2 after find_package is done? I tried to clear FETCHCONTENT_QUIET, but it did nothing. txt. Do not share a FETCHCONTENT_BASE_DIR between different builds. With CMake 3. Load 7 more related questions Show fewer related questions Sorted by: Reset to default Know someone who can answer? Share a link to this question via email, Twitter, or Facebook. 2 from Arch, and when using FetchContent_Populate, the variable <name>_POPULATED is not filled. If the dependency name is changed to googletest or to foobar everything works as expected. cmake file. txt file which adds the headers to a library called Vulkan::Headers so you can just add the subdirectory and then link to them using target_link_libraries(example PRIVATE Vulkan::Headers). Thanks for the quick answer. 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. Which CMP do you think can cause this, only one I see is CMP170 but it talks about the FETCHCONTENT_FULLY_DISCONNECTED and not We recently started to move some of the manual dependent-repo fetching we were doing over to be automatically pulled in via FetchContent. txt directly. Fabulous. Much like Find Module and Package Config files, these need not be guarded against the What is the best way to add a dependency on Boost when using the CMake FetContent module. ; The first argument for both functions is <name> and must be identical. Ask Question Asked 2 years, 1 month ago. scott (Craig Scott) March 7, 2024, 9:08pm 2. It’s definitely a lot easier when everything’s automatic, but the initial fetching (and after any time someone does a clean build since the fetched sources are stored in the build tree) is much slower than it used to be just cd "c:\Users\maste\Desktop\CmakeProject1\" && g++ main. I am trying to have CMake find Doxygen on a bunch of different systems and configurations: Online documentation is generated on Ubuntu; Local tests and development is done on Macos; Doxygen can be installed system Not sure if this is the proper understanding of how things should work in CMake with FetchContent, but the above worked for me. Tested with CMake 3. In your case it could look something like. About; Products CMake FetchContent show download progress. All you need is to let CMake know where the sources are with a However, if you decide to use FetchContent, which is the more recent CMake's standard for adding dependencies, then it will clone the repo and add it as a subdirectory, not installing it. CMake FetchContent Does Not Populate Name in '*_SOURCE_DIR' Ask Question Asked 11 Parameter SOURCE_DIR of FetchContent_Declare (and of ExternalProject_Add) affects where the downloaded file will be unpacked:. cmake -S <path/to/src> -B <path/to/build> -DFETCHCONTENT_SOURCE_DIR_ZLIB <path/to/zlib/src> How to link jsoncpp with cmake Hot Network Questions Refereeing a maths paper with individually poor-quality results which nevertheless combine two very different subfields Then declaring the dependencies is done via the FetchContent_DeclareEx with the usual arguments. Share. `FetchContent` and `<PROJECT-NAME>_VERSION` - CMake Discourse Loading But it does not work. 0 and 6. tar. My tool is located in: <project>/clang-tools-extra/mytool. cmake file (or equivalently <name>Config. Stack Overflow. The CMake execution is (currently) inherently single threaded. Closed HpLightcorner opened this issue Apr 25, 2022 · 1 comment Closed CMake FetchContent Examples are not working "out of the box" on MacOS and Windows when requesting https (SSL) endpoint #730. 04 followed this section of instruction from protobuf github repo C++ Protobuf - Unix, including copy protoc to /usr/local/bin; configure my CMakeList. Basically, rather than using Git submodules, we chose to use FetchContent. Modified 3 years, 8 months ago. You may need one target per command, and that becomes quickly annoying. target_link_libraries(myapp PUBLIC Eigen3::Eigen) (How to add Eigen library to a cmake c++ @craig. They only work reliably when one is in total control of everything pulled in. Objective. 0. Not trying to resurrect an old thread, but leaving the below comment after ending up here while following links of a recent discussion. The CMake script of SDL2_image builds only a shared or static library, not both. AI features where you work: search, IDE, and chat. Note, that the setting of a default configuration in the given project is not very good one. FetchContent_MakeAvailable is effectively add_subdirectory call, so FetchContent-ed project becomes part of the main project. 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. Namely, it External lib builds with cmake. This module enables populating content at configure time via any method supported by the ExternalProject module. But why would you do this? To use I have problems building a project with two external dependencies that define the same target. If your fetched project contains top-level CMakeLists. This would force a re-download, no matter the state of the files and is unfriendly to any web resource you might I am trying to use FetchContent to include Catch2 into a CMake project I am working on, but it does not seem to work. CMake can't find Protobuf `protobuf_generate_cpp` 1. Related questions. 10. Then try to locate the GTestConfig. Collectives™ on Stack Overflow I am trying to use CMake's FetchContent to retrieve an external project. Collectives™ on Stack Overflow Starting with CMake 3. I need to get libCURL and OpenSSL from the github repo using FetchContent. The directory that the CMAKE_FIND_PACKAGE_REDIRECTS_DIR variable points to is cleared at the start of every 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. Config scripts, shipped with the installed package, normally defines IMPORTED targets. Your Answer Reminder: Answers generated by artificial intelligence First you must build AND install Googletest using CMake build system. Use this instead. Problem using FetchContent_Declare together with shared library. scott thank you for your wonderful work on FetchContent, the find_package integrations are an amazing feature! Unless the docs are out of date, it looks like find_dependency only wraps a find_package call, there seems to be no “official” way to use FetchContent from a package-config. There are four that I want to move out: zlib, libpng, ogg, and vorbis. What that means is that you can no longer include it in the expected way, since Intellisense not working with CMake FetchContent. 7, is it a deprecated way to find libraries in CMAKE? The purpose of the FETCHCONTENT_TRY_FIND_PACKAGE_MODE variable is to provide a global switch for overall behavior. Git branch name, tag or commit hash. txt in the root folder. 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. Hi all, I’m working on a C++ project using CMake, where I manage all my third-party dependencies using FetchContent exclusively (i. I moved the zlib out and in another spot a standard library exception thrown during file lookup started terminating the game. txt to bring in a git repo I need for my build. I am limited to a single repository for a work project. CMake is capable of generating the config files itself, but this requires some changes to the CMakeLists. 9. com. Collectives™ on Stack Overflow. 7 Using cmake with fortran. 4 CMake's FetchContent with Makefile-built Ask questions, find answers and collaborate at work with Stack Overflow for Teams. Modified 3 months ago. 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. txt [requires] glog/0. More specifically, if you can use FetchContent to not just download the dependencies but also to add them directly to your build, that is typically simpler than ExternalProject (read up on using FetchContent_MakeAvailable() specifically). However, when I use cmake from the command line, then it works. A library target name: The generated link line will have the full path to the linkable library file associated with the target. Each project is handled separately and are not inherently part of the same source tree. That includes these options: CONFIGURE_COMMAND; CMake not recognizing FORTRAN source in mixed C++/FORTRAN program. I can git clone any URL, but for some reason Cmake can't use git. beach at gmail. I would love to Expected behavior according to the documentation: When this option is enabled, the git clone operation will be given the --depth 1 option. : target_compile_definitions( boost INTERFACE $<$<CONFIG:Release>:BOOST_DISABLE_ASSERT> BOOST_ASIO_NO_DEPRECATED BOOST_SYSTEM_NO_DEPRECATED BOOST_THREAD_VERSION=5 I’m not clear on what you’re potentially running concurrently. sdbbs sdbbs. Project B is a device controller / HAL Ordinarily, I advise choosing one or the other rather than mixing FetchContent and ExternalProject. – Not as of CMake 3. The directory that the CMAKE_FIND_PACKAGE_REDIRECTS_DIR variable points to is cleared at the start of every Fetchcontent is great, but it has the unwanted side-effect that your workspace becomes cluttered by all targets of your dependency. But not on windows as you can see 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. I don't know if problem is coming from gtest or from cmake. 24: Ensure the CMAKE_FIND_PACKAGE_REDIRECTS_DIR directory contains a <lowercaseName>-config. If the external lib builds with cmake then you could add the lib to your build via a add_subdirectory(${libname_SOURCE_DIR}) call. 23 (pre-release). 4 CMake's FetchContent with Makefile I am migrating a codebase that included external projects in its source tree to a FetchContent-based solution. I need separate In FetchContent declaration I passed name as "dependency1" as I remember "Dependency1" was not working earlier . But you shouldn’t need these variables anyway. I would like to do this with Boost, too. After I use the combination of. Note the name of my dependency is Dependency1 (with capital D) . Exception is a variable which is set by the subproject itself, or a The FetchContent module also supports defining and populating content in a single call, with no check for whether the content has been populated elsewhere already. 5. From the documentation of FetchContent CMake module. 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 strong preference to not use git submodules (they are a hot mess), and noticed that the README. g. After that, it succeeds every time. Learn more Explore Teams. But it emits a cursed warning stating that calling FetchContent_Populate by itself is deprecated and will be removed from a future version of cmake. cmake module from being used. CMake gets all needed options by the IDEs we use, e. I have no idea if it is even possible. See FetchContent_Populate() for details. After using FetchContent as described in the documentation the catch_discover_tests() function is still not found. This does not work for me when I use Visual Studio 2022. txt file that I've tested: Both FetchContent and find_package are intended to introduce a 3d-party project for use it during the build of main project. The gymnastics involved in maintaining this setup Trying to configure a multi repository project with CMake. That prevented those projects from being handled by dependency providers. json in VisualStudio, from Ninja to Visual Studio 17 2022 Win64 it is able to compile the test program successfully, and everything works. So instead I would try (I did not) writing a script performing the build, let's call it build-boost. And remove the example-subbuild dir after running FetchContent. Problems install protobuf using cmake. I'm actually building for Android platform but that doesn't matter much. I want to use Populate to pull and extract a . So now you can add this path to the CMAKE_PREFIX_PATH variable. origin/myBranch rather than simply myBranch). Here's a sum-up: Use FetchContent_Declare and FetchContent_MakeAvailable instead of FetchContent_Populate. It provides a CMakeLists. I looked through the list of CMake I'm running cmake 3. In a separate repository I have a CMake project which utilizes FetchContent to pull specific dependencies from their corresponding branches. FetchContent not working well if used before the first project call It does work well before the first project call for some use cases. This of course works only if you can replace all FetchContent_Declare calls with FetchContent_DeclareEx which is not always possible 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. Hello, I’m looking for some help with FetchContent_Populate. 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. Actually, FetchContent fills variables ${eigen_SOURCE_DIR} and ${eigen_BINARY_DIR} which names are constructed from the lowercase variant of the . This CMake project includes a number of libraries which it retrieves using FetchContent. Content population The repository you specified does not actually contain the Vulkan headers. before the first project() call. I’ve managed to achieve this using FetchContent alone, as shown below (for glm): My goal is to configure cmake file and build my app with protobuf lib. I am following the guide from this site in To accomplish that I used CMake's module FetchContent and it currently works . Commands ¶ FetchContent_Declare ¶ I think you might be out of luck. Collectives™ on Stack Overflow I can call git clone in the same directory and the same shell session successfully and yet cmake's From the CMake docs. 1. ; If I tell CMake that HIGHS_SOURCE_DIR is the src folder within root, then, when it configures Highs, and it gets to src/CMakeLists. At best, I guess it could be because there's no git ssh key, although that doesn't make sense because It provides a broader overview of where the FetchContent module fits into the bigger picture, including its relationship to the find_package () command. txt as below: This parameter works for ExternalProject_Add, so it would probably work for FetchContent_Declare, which is its wrapper. This should not be done in projects, but may be appropriate for populating content in CMake script mode. I am looking to build the library using cmake. 15. Teams. Since that file was missing curl couldn't validate the identity of I have a git repository with various dependencies distributed over separate branches (some of which take a lot of space). CMAKE_BUILD_TYPE or custom flags. Content population 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. All it is effectively doing in this case is preventing the user’s Findfmt. My attempted steps: built protobuf in Ubuntu 20. 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. I circumvented this by using “FetchContent_Populate” and add_subdirectory( I am debugging an issue where FetchContent instead of checking out a requested branch leaves a repository in a detached HEAD state (where HEAD is pointing to the requested branch though). 18+ we can provide a SOURCE_SUBDIR option to ask it to look in the cmake directory, which means some sort of build is attempted. json since this line does not add an include directory for cpr or link to the library. 0 [cmake] -- Detecting C compiler ABI info [cmake] -- Detecting C compiler ABI info - done This script is shipped with CMake. Unlike to ExternalProject_Add function, which configures a subproject as a separate CMake project, the FetchContent_MakeAvailable effectively calls. com> wrote: > I'm upgrading from cmake 3. HpLightcorner opened I am looking to automate the compilation of a given c++ library (in this case, cpprestsdk). Viewed 7k times scp with sshpass does not work (with custom identity file and custom port) Sorry again, @ben. You can specify a subdirectory below ${CMAKE_BINARY_DIRECTORY} though (and I do this in some projects). 5,364 7 7 gold badges 56 56 silver badges 116 116 bronze badges. 11+ you can make use of CMake's FetchContent function. – Tsyvarev. Cmake find_package does not work with Doxygen. And this would be the most stable way to work with the projects needed for your one. With CMake, how can we use use FetchContent for two libraries (both CMake projects) libfoo and libbar, with libfoo having libbar as a dependency?. Making FETCHCONTENT_BASE_DIR work with a global cache would make this process much more time and space efficient. Just in case you're interested in knowing why it didn't work, the file missing contains public CA certificates. Most projects doesn't describe the ability of being included as a subproject, but this could work. About; Products OverflowAI; which do not work on set_target_properties. Try Teams for free Explore Teams. FetchContent_Declare( pkg GIT_REPOSITORY sth GIT_TAG sth FIND_PACKAGE_ARGS ) FetchContent_MakeAvailable(pkg) CMake FetchContent does not copy libraries. If you’re talking about running multiple Hi, I am trying to use FetchContent to build and statically link against a third party dependency in my c++ project. CMake for protobuf library. CMake will then automatically configure and build the external project using its own build system (usually No, you cannot tell CMake to not reconfigure a project added via FetchContent when the main project is modified. After using FetchContent as described in the CMake FetchContent_* does not work with GTest as dependency name. Yet, I found no information on how to tackle this. One repo works fine with the SourceDir populated. If FetchContent cannot solve this very straightforward problem, what use does it even have?. cmake --help-module FetchContent produces the FetchContent_MakeAvailable performs add_subdirectory call only when source directory of the fetched project actually contains CMakeLists. github. Modified 2 years ago. 1. Then my target MyPkg has a target_link_libraries(PUBLIC) against DepPkg becaue it uses #include <DepPkg> in the code. (Also note that this is the 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 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. That way cmake will build the external lib as a subfolder ("subproject"). Hence I wrote the follow FetchContent not working well if used before the first project call It does work well before the first project call for some use cases. Intellisense not working with CMake FetchContent. use find_package(fmt CONFIG ${FMT_VERSION} REQUIRED). e. There was work I did for FetchContent which avoided using a sub-build, but I had to revert it after it broke some existing behavior. ; CMake provides two 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. CMake target dependency to Do not use ${CMAKE_BINARY_DIR} as the SOURCE_DIR. However, it also brings in a (large) submodule I don't need for the build. How to avoid update checks with CMake FetchContent? 0. 30, I always want to use all the new CMake policies to make sure I’m compatible. Everything works fine. cmake not in glm 0. Here's my code to fetch my dependency In our case we are downloading libraries with FetchContent and than use for example find_package to make them available. So, how do I achieve that? cmake's I have two FetchContent actions to get two repositories. You I create an issue on SLD_Image repository, and they give the following answer, that actually work. 2. For reference here is the CMakeLists. I am trying to use FetchContent to include Catch2 into a CMake project I am working on, but it does not seem to work. cmake). This is called "vendoring" code. In target_link_libraries I thought it should take the name that I passed to the FetchContent declaration but its very strange. – 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 Problem solved. txt, then FetchContent will not perform cmake configure/build on that New in version 3. boeckel, but I don’t see how setting -DHIGHS_SOURCE_DIR can help here. <name>_SOURCE_DIR and <name>_BINARY_DIR are properly filled, and calling FetchContent_GetProperties for POPULATED on the target returns 0. When developing cross-platform applications I must remember to keep in mind that Windows doesn't have dedicated locations for libraries and executables unlike Linux. The default behavior of git clone executed by ExternalProject_Add (which is called by Cmake FetchContent googletest not working on windows. For information about how to write and use configuration files for your projects, see the CMake On Sat, Mar 23, 2019 at 1:58 PM Jason Beach <jason. add_custom_target is probably better because it is declaring a target that is convenient to depend on, using add_dependencies. Ask questions, find answers and collaborate at work with Stack Overflow for Teams. in case of Eigen you could write. Building protobuf 3. 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. CMake doesn't work with Google Protobuf. I setup my github account on my computer to use github's ssh configuration for cloning. 9. If the library is not available, I intend to fetch it and compile it FetchContent is a CMake module that makes downloading or “fetching” dependencies really trivial. However, having added my compile options to the program (thanks JeJo), I've noticed something: When I first configure my project (fetching wx, compiling it, essentially Overview ¶. cpp -o main && "c:\Users\maste\Desktop\CmakeProject1\"main your bug appears to be in your tasks. In researching this issue I found this answer which seems to work fine for compiled boost libraries like thread or filesystem but does not work for header only libraries like asio. When you use FetchContent, it's as if you wrote the "third-party" code yourself. If the downloaded source directory doesn’t contain a CMakeLists. Then how do I correctly handle its installation Ask questions, find answers and collaborate at work with Stack Overflow for Teams. Learn more about Collectives Teams. You can add it to command line or save to cmake presets instead of editing CMakeLists. I’m not sure if this is an issue with my understanding of the docs or with the tool. Foll However C/C++ IntelliSense seems to not work with CMake projects. It relies on the URL: If the project is not hosted on Git, you can specify a direct URL to download the source code. The other has an empty SourceDir. 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. 22 boot sector change the disk parameter table? Can quantum computers connect to classical computers to produce output? What is the correct way to uninstall software on Windows? Is I use FetchContent in my CMakeLists. FetchContent can deal with non-CMake projects, too. In that case it will use the BUILD_INTERFACE settings, which points to the project directory itself. Asking for help, clarification, or responding to other answers. The include and binary files for libbar are obviously present after I am having some trouble understanding how this scenario should be handled. Add a comment | Your Answer Reminder: Answers generated by artificial intelligence tools are System information (version) OpenCV => 4. So I plan to download boost and run bootstrap_sh and b2. cmake and <name>ConfigVersion. 3 Operating System / Platform => Manjaro Linux Compiler => g++/gcc 11. Content population 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 Run "cmake --help-policy CMP0063" for policy details. Problem has nothing to do with pkg-config. This is I'm not sure why, but it's failing to download anything through the `fetchContent` tag. This function defines SOURCE_DIR option for FetchContent_Declare according to FETCH_TARGET_DIR. 12. Dealing with nested cmake projects using FetchContent_ 4. I am trying to use CMake build system using the CLion IDE for a project. From the FetchContent docs: The <contentOptions> can be any of the download, update or patch options that the ExternalProject_Add() command understands. Viewed 1k times 0 I am new to CMake and have been playing around with a "Modern CMake" The documentation appears to be here. I do this all the time in client projects to bring in a repo that defines common CMake build logic, provides toolchain files, etc. I came to the forum looking for information on exactly this scenario–I have several projects that are currently woven together I have to preface my question with a brief explanation of why I’d even ask this because I know what I’m asking about is far from idiomatic use of CMake. 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. Load 7 more related questions Show Happy to hear you got it working. Just give a try. But the problem is that it fails every first time I run cmake. At the moment, it is less suitable if the repo you want to bring in is large because, I am working on a mocking library for C that is meant to be easy to use and portable so I decided to use CMake as the backbone. New in version 3. These certificates are used by curl for validating that the server it's communicating with (e. Thus, any options related to these steps is explicitly ignored when calling FetchContent_Declare(). CMAKE_ARGS, CONFIGURE_COMMAND). This form derives all population options from the previous FetchContent_Declare call. 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. GIT_TAG . txt, and it needs boost library. Commented Apr 2, 2020 at 7:17. Here is my code: [cmake] Not searching for unused variables given on the command line. 1 cmake missing fortran module dependency in preprocessor directive Including opencv with fetchcontent does not work. A user would include this (non-binary) library with New in version 3. Including opencv with fetchcontent does not work. Adding the CONFIG keyword isn’t the solution to this problem. There are two forms of FetchContent_Populate command:. I have a header only library DepPkg that is downloaded automatically via FetchContent if it is not found on the system. I call CMake like this cmake -B build/arm64-v8a or cmake -B build/x86 . 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. Also note that since OpenSSL does not use the CMake build system I am relying on I would not work in this way! You will lost any subproject compile and link option, i. The CMakeLists. CMake FetchContent_* does not work with GTest as dependency name. 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. Nothing changed as you can see from the commit history, the only thing that was changed was the CMake policy max. gz archive from our int Note, that most CMake projects are designed to be installed and then used via find_package. 29 to 3. 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. However, those variables are not propagated to the top level repo1 with FetchContent. 13 and 3. Viewed 596 times 0 . – Ask questions, find answers and collaborate at work with Stack Overflow for Teams. txt file of the external lib will have some add_library(ext_lib_name ) statements in it. Here is the documentation I am reading: Each <item> may be:. Is there a For anyone curious, I got it to work by using conan. 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 CMake 3. craig. If you don't like this then ExternalProject_Add seems to be a reasonable solution. I want to use one of them in different project. 30? A full example from ProfessionalCMake book: I'm facing some issue building gtest inside my project using FetchContent. Notice how configure and build options are not on that list (Ex. The short form, which accepts only a name of the content. Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. sh: #!/bin/bash # This is meant to be run from the source directory of Boost. Hot Network Questions Why not make all keywords soft in python? American sci-fi comedy movie with a young cast killing aliens that hatch from eggs in a cave and take over Same goes for FetchContent and similar CMake modules. 2. Provide details and share your research! But avoid . Like many other projects, this has dependencies. FetchContent will set HIGHS_SOURCE_DIR to the root folder. Because you aren't going through find_package, you will need to install() "your" target like any other dependency that you will export. " - You manually create variables BOOST_INCLUDE_LIBRARIES and BOOST_ENABLE_CMAKE, the compilation works. This repository has multiple distinct projects within it but these are all built using a single CMake mega-project. E. So you need to set BUILD_SHARED_LIBS to a false-ish value. Everything you could 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. The sub-build that FetchContent creates does not use any toolchain file by design. Q&A for work CMake FetchContent does not copy libraries. ; Do not use add_subdirectory, this is done automatically by FetchContent_MakeAvailable after Many open source projects continued to use FetchContent_Populate() long after FetchContent_MakeAvailable() replaced it as the recommended way to populate content. cmake: Integrating FetchContent with find_package() Hot Network Questions Why does the MS-DOS 4. 4. Add a comment | 2 Answers Sorted by: Reset to Cmake FetchContent_Declare Documentation: The <contentOptions> can be any of the download, update or patch options that the The variables you are trying to reference (XercesC_INCLUDE_DIR and XercesC_LIBRARIES) are only defined if you use find_package(), not FetchContent (here I mean only if find_package() finds XercesC the normal way rather than being redirected to find it via FetchContent instead like you’re doing). In all other cases, a singular call to find_package(MyDep REQUIRED) is the only level of concern downstreams should have to deal with. That shares more than just the downloaded sources, it also shares all the bookkeeping files used internally. Skip to main content. So apparently, the cmake in Visual Studio does things a little bit differently. I'm writing a CMakeLists. txt, the code in there will expect HIGHS_SOURCE_DIR to point to the root Linking to library retrieved with fetchContent - CMake Discourse Loading After struggling with this for a few hours, I found that by changing the Cmake generator, under CMakeSettings. com and not someone else pretending to be github. md used to have instructions for how to use FetchContent to obtain/use vcpkg in a CMake project. [cmake] -- The C compiler identification is GNU 11. whether a package satisfies a dependency; which variables/targets the package exports. There are some other problems with your code, in addition to Corristo's answer. So you just have to use Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. Project A is an graphical application which uses Project B for all hardware related details and code. add_subdirectory(<subproject_source_dir> <binary_dir>) So, when a subproject is configured, it accesses master variables. I have several ideas about this: Extend the 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 Thus the function can be used only with already installed Protobuf, but not with the one included with FetchContent. The directory that the CMAKE_FIND_PACKAGE_REDIRECTS_DIR variable points to is cleared at the start of every The variable CMAKE_INCLUDE_PATH is meant to be set as a cache variable, at the cmake command line: cmake -DCMAKE_INCLUDE_PATH=“absolute_path_of_directory” or as an environment variable. 17. I followed conans documentation and created this conanfile. My goal is to be able to compile the project’s tests along with the project’s dependencies tests too. cmake and a <lowercaseName>-config-version. Follow answered Jan 15 at 15:53. GLM doesn't have a Find script (see FindGLM. 0 [cmake] -- The CXX compiler identification is GNU 11. Target "sndfile-interleave" of type "EXECUTABLE" has the following visibility properties set for C: C_VISIBILITY_PRESET For compatibility CMake is not honoring them for this target. 1 [generators] CMakeDeps CMakeToolchain Overview ¶. To debug this, I am looking at the CMake code FetchContent is executing while performing the update step, and from what I can tell it should do the right thing. 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 Variables like GLM_LIBRARIES or GLM_INCLUDE_DIRS are usually defined by Find scripts (shipped with CMake or with the consumer project). Previously it was getting caught by a catch block find_package uses configuration files installed with the package to determine:. In this situation there is a lib, and several applications that depend on this lib. . In your case the following should work: I would like to use CppADCodeGen in my project using CMake FetchContent. However, the whole history is still downloaded when the option is set to ON, with CMake 3. e no other package manager is installed nor run). Ask Question Asked 3 years, 8 months ago. 24, FetchContent_Declare has OVERRIDE_FIND_PACKAGE option FetchContent_Declare( TheProject GIT_REPOSITORY <the git repo> GIT_TAG <the git commit> ) FetchContent_Populate(TheProject) This works, and it does not invoke the build system. The buildsystem will have a dependency to re-link <target> if the library file changes. I am encouraged by the fact that CMake support for Boost is steadily improving. CMake's FetchContent page uses googletest as an example! I've provided a small modification of the accepted answer: Cmake FetchContent googletest not working on windows. If a subproject is not ready for such inclusion, then this inclusion will fail. cmake: Integrating FetchContent with find_package() Hot Network Questions The load process will populate many useful internal variables that specify architecture and tools and such. If you’re a library writer, There's an option to add cache variable FETCHCONTENT_SOURCE_DIR_<uppercaseName> (here's a link to documentation). If you want to build external project once, then use ExternalProject_Add. CMake has no idea that it's external. Find centralized, trusted content and collaborate around the technologies you use most. It was my understanding that the full library name nlohmann_json::nlohmann_json should be enough for it to be discovered, am I missing something here? Thanks in advance. My investigation I have created a repository that contains two libraries foo and bar. At the moment, it is less suitable if the repo you want to bring in is large because, Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. The deprecation is a clear signal that projects relying on FetchContent_Populate() need to migrate. Ask Question Asked 4 years, 10 months ago. "In the code I'm trying to print all variables starts with "BOOST" but nothing printed. FetchContent module eventually calls add_subdirectory with the top-level directory of the subproject. Note that branch names and tags should generally be specified as remote names (i. 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 I'm currently working on a CMake project that uses Jenkins for its continuous integration. I want to first build OpenSSL statically and then tell CMake to pass the OpenSSL::SSL to libCURL so it can statically link it. 0 Problem using FetchContent_Declare together with shared library. I guess because there is no CMakeLists. 7. 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. 0 Detailed description I tried to link OpenCV with cmake FetchContent, but it seems as the include directories are not set Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. They define same functions std::string call() but provides different result. It seems that content fetching will update the submodules even if GIT_SUBMODULES "" argument is not present under FetchContent_Declare. txt you could just link with the target(s) created by the subproject. version from 3. ; ref: CMake FetchContent Examples are not working "out of the box" on MacOS and Windows when requesting https (SSL) endpoint #730. m. Is there a reason these instructions I’m currently working on a project where I aim to use find_package() to check if a library is available in the system. Overview ¶. This form implies that all population options will be FetchContent_Populate() however fails to fill the variables ${Eigen_SOURCE_DIR} and ${Eigen_BINARY_DIR} (which the documentation told me should happen). Use the cmake_policy command to set the policy and suppress this warning. I'm on Ubuntu There are some tests found in cmake git repo: But I can confirm, it does not work with cmake v3. Below is a minimal working example that replicate I’m using FetchContent to manage third-party dependencies, and I ran into an issue when trying to deduplicate the sub-builds generated for different build configurations. See in particular the mentions of <lowercaseName>_SOURCE_DIR. Explore Teams. Fetch and Configure. 3. I control the lib and applications. com) is actually github. The performance gains on If a subproject follows the target-oriented style ("modern CMake"), then one rarely need to know its source or binary directory: for consume the subproject in the CMakeLists. I still harbour a desire to bring that change back in a form that avoids the previous problems. Our workflow does currently not include manual adjusting of CMake Options/Variables and we do not want to add that. For example I have apt installed some package as pkg-dev. in the case of multi-configuration generators (like Visual Studio) the variable CMAKE_BUILD_TYPE is not used, and setting it may confuse some CMake projects. Also you don't appear to be using CMake in VSCode. 4 on windows with cmake. Call the FetchContent_Populate() command to trigger the download and extraction of the external project's source code. The long form, which accepts additional options. ". If the library is not available, I intend to fetch it and compile it using FetchContent. cmake file in the installation directory. Improve this answer. The guide is recommended pre I’m currently working on a project where I aim to use find_package() to check if a library is available in the system.