The interface properties are only given to external targets linking to your target, A list available generators. is not modified. Usage describes the basic command line interface and its options. rev2023.3.1.43269. Why does the Angel of the Lord say: you have not withheld your son from me in Genesis? The cmake-commands(7) manual entry for
is Projects specify CMakeCache.txt file and populates it with customizable settings for For GCC/clang I usually have the following set of warnings: -Werror: Treat warnings as errors. Copyright 2000-2017 Kitware, Inc. and Contributors. All manuals are printed in a human-readable text format. See the documentation for Have a question about this project? When creating a library you specify include directories and link to other libraries. You can use that to specify warnings as well. If variables are defined using -D, this must be You signed in with another tab or window. Changing some of the variables may result rev2023.3.1.43269. If any of the listed files already do not Sign up for a free GitHub account to open an issue and contact its maintainers and the community. For help and discussion about using cmake, a mailing list is An error be is a syntax error that prevents compilation. List policies with help available and exit. Browse other questions tagged. CMAKE_GENERATOR_TOOLSET variable for details. Not the answer you're looking for? Just registered to this forum for this topic. Making statements based on opinion; back them up with references or personal experience. Before you start doing if(), take a look at generator expressions: This code will enable -Wall for GCC and clang and /W4 for MSVC. They have their policy and that's fine. The cmake executable is the CMake command-line interface. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. For multi-configuration tools, choose configuration . The major version number in integer form. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, @AlexReinking I agree with your point about the pitfalls, but I'm not sure if it really is an issue here. So on CI, for example, I invoked CMake with: That way the compiler will always have the warning flags enabled. Warnings are important, especially in C++. steps. documentation at https://cmake.org before posting questions to I would like to make that warning an error, any any other CMake Warning. The help is printed to a named ile if given. The help is printed to a named ile if given. takes priority over the projects default value. as file names even if they start in -. Different compilers produce different warnings --- there's no standard. By default this will also turn on deprecation warnings. Without that flag a warning is generated when compiling, but you might miss it. using the --help-policy option followed by a policy name. I am working up a PR to use that phrasing for both gcc and clang. Users build a project by using CMake to generate a build system for a Is the Dragonborn's Breath Weapon from Fizban's Treasury of Dragons an attack? Lines may not start in - Tip: For header-only libraries enable warnings on the test target of the library. except for --add-file= to add files whose Specify whether to treat warnings on compile as errors. I would like cmake to stop immediately if it encounters any internal error. How to disable unused code warnings in Rust? To learn more, see our tips on writing great answers. In gcc and clang, only turn on -Werror for warnings covered by -Wall, build: cmake: ability to disable -Werror* (-Werror considered harmful). Making statements based on opinion; back them up with references or personal experience. You should open up a new question and create a reproducible scenario to answer your new question. Save the file and rebuild the application: make clean all. /WX tells the compiler to treat all warnings as errors. Suspicious referee report, are "suggested citations" from a paper mill? While the above method works greater for most libraries, it doesnt work with header-only libraries. The reason it didnt work with PUBLIC was because public properties are both PRIVATE and INTERFACE. PTIJ Should we be afraid of Artificial Intelligence? to load cache entries before the first pass through the projects As final solutions, I think we should do one of two approaches: Create a CMake function called for all our targets. Sometimes you pass an unused variable to cmake and that would output a warning which i like to prevent. for the author of the CMakeLists.txt files. created. List variables with help available and exit. You have to use INTERFACE instead of PUBLIC. Making statements based on opinion; back them up with references or personal experience. rev2023.3.1.43269. Blank lines are ignored. With target_compile_options() you can also specify compiler flags for your target. For MSVC I use /WX /W4. Has Microsoft lowered its Windows 11 eligibility criteria? The option may be repeated for as many cache entries as Already on GitHub? You can disable the warning like this when you are configuring your build. calls. @jamiesnape Per nightly msan 107 that I launched by hand, it looks like we're back to "normal" now as far as the msan build warnings. Not sure where I need to put -Wno-dev. Many are likely using a different toolchain with different sets of warnings and sensitivities for those warnings. Disable warnings for GTest ddnet/ddnet#978 added a commit to ddnet/ddnet that referenced this issue tonka3000 mentioned this issue on Jan 15, 2018 Remove -WX flag in msvc builds because it will break builds with msvc 15.5 lasote/conan-gtest#37 coder0xff mentioned this issue on Jan 27, 2018 #2370 is breaking some of the more exotic CI builds, so we need an easy way to switch it off. Only useful on one try_compile at a time. -Wall -Wextra -Wpedantic. ) Developers who enable -Werror are making a statement: we care about our code base, and we won't accept warnings here. The minor version number in integer form. The help is printed to a named ile if given. time, and only when debugging. So an external project linking my_library will not get any warnings from the header files of my library. The list contains all manuals for which help may be obtained by Some CMake generators support a platform name to be given to the Temporarily, I want to only see errors when I run make. Have a question about this project? the project. Possible generator names are specified in the Displays arguments as text but no new line. That probably won't work because after you fetch the external projects, you add it witch add_subdirectory () to your build tree. The currently By clicking Sign up for GitHub, you agree to our terms of service and UNIX is a registered trademark of The Open Group. Jordan's line about intimate parties in The Great Gatsby? if there is no implementation for the compiler being used. It may platforms. if you do: CMake Warning: Manually-specified variables were not used by the project: MY_UNUSED_VAR. Here is a CLI example where I configure/generate my build and turn off cmake dev warnings. if you do: cmake -DMY_UNUSED_VAR=true it will output make CFLAGS="-Wno-error=format-truncation" The default Makefile rules, and most well-written Makefiles, should see CFLAGS for option arguments to the C compiler being used. May only be specified once. The text was updated successfully, but these errors were encountered: Successfully merging a pull request may close this issue. build system. Of course, there are more warnings not enabled by those ones. implemented compiler IDs are: This property is initialized by the value of the variable Wildcards are not supported. Generate a graphviz input file that will contain all the library and What is CMake equivalent of 'configure --prefix=DIR && make all install '? The given file should be a CMake script Speaking as someone who regularly uses top-of-tree compiler builds, where warnings break frequently, hard-coded warnings-as-errors is a blight. And as the warnings are specified as PRIVATE, they will only be used when compiling your library. The best way to do this, then, is to set the new (as of CMake 3.24) variable CMAKE_COMPILE_WARNING_AS_ERROR set to ON only when you know it is safe to do so. I think this is problematic, because your code is designed with a certain warning level in mind. The help is printed to a named ile if given. files. So, it may be a configuration issue. Sign in Print a warning when an uninitialized variable is used. -Wno-dev Here is a CLI example where I configure/generate my build and turn off cmake dev warnings. Already on GitHub? Build target clean first, then build. Do EMC test houses typically accept copper foil in EUT? true if the generator supports toolsets and false otherwise. The help is printed to a named ile if given. CMAKE_COMPILE_WARNING_AS_ERROR if it is set when a target is Suppress warnings for usage of deprecated functionality, that are meant Tip: Use generator expressions to conditionally enable different warnings for different compilers. Thanks for contributing an answer to Stack Overflow! @david-german-tri Let's DM about who is going to take on this ticket. Why are non-Western countries siding with China in the UN? -Werror is the right thing to do when developing, because you want developers to fix the warnings. I am trying to stop cmake from continuing generation if it outputs a warning, i.e. then returns 0, if not it returns 1. So turning warnings errors simply causes build failures on environments which don't match yours. but as a library writer you can prevent the issue for projects with you as a dependency. projects default values. But they can at least issue a warning if you do such things. Rename a file or directory (on one volume). -Werror is a compiler flag that causes all compiler warnings to be treated as errors. The CI runs on windows, osx and ubuntu, but the warning only appears on ubuntu. Should I include the MIT licence of a library which I use from a CDN? the generator. Compile at a lower warning levelfor example, use /W3 instead of /W4. human-readable text format. This is problematic when you use add_subdirectory() to compile some external dependencies which do not compile without warnings. Although if you insist on having some authority, here, have a link to, https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b339ec9c229aaf399296a120d7be0e34fbc355ca, https://devmanual.gentoo.org/ebuild-writing/common-mistakes/index.html, The open-source game engine youve been waiting for: Godot (Ep. in a human-readable text format. The trick is to use target_include_directories(my_library SYSTEM PUBLIC include/). It turns out the answer was to simply add the line. The list contains all policies for which help may be obtained by Thanks. text format. Make deprecated macro and function warnings errors. Possibly a feature request for cmake to set globally to ignore warnings of any used libs? Find centralized, trusted content and collaborate around the technologies you use most. jakebolewski added the build label on Feb 19, 2018 jakebolewski changed the title Have a CMAKE object to disable warnings as errors Have a CMAKE option to disable warnings as errors on Feb 19, 2018 Read file names from the given file, one per line. Create MD5 checksum of files in md5sum compatible format: Remove the file(s). Make warnings for usage of deprecated macros and functions, that are meant This would turn off more warnings than necessary. in more variables being created. CMakeCache.txt file, globbing expressions using * and ? Do not delete the try_compile build tree. How can I configure CMake to treat compiler warnings as errors during the build? You can disable the warning like this when you are configuring your build. Print a trace of all calls made and from where. they have changed. The text was updated successfully, but these errors were encountered: @jamiesnape Please link to one or two breaks, for our reference. CMake may support multiple native build systems on certain But when including them from other source files, I dont want them. The help is printed to a named ile if given. What are examples of software that may be seriously affected by a time jump? Let's fix that. additional information such as the cache, log files etc. Asking for help, clarification, or responding to other answers. Because an error occurred, no object or executable file was generated. This way only our own targets get them. treat all warnings as errors and stop. Available commands are: Report cmake capabilities in JSON format. CACHE signature. If a file does This is a nice clean solution, the only issue is that the compiler flags are compiler dependent. If a directory does This mode is not well-supported due to some technical limitations. may sign up on the CMake web page. Similarly, you can use CXXFLAGS for providing options to the C++ compiler, and LDFLAGS for the linker. This option may be used to remove one or more variables from the human-readable text format. CMake is a cross-platform build system generator. @Karthik, muru gave you the command line: @muru, your comment sounds like the answer here; would you mind providing it as such? A list of strings with all the extra generators compatible with In any case, I have a WIP patch in the wings that changes -Wall -Werror to -Werror=all, which would be a superior medium-term fix if it solves the current breaks. How to increase the number of CPUs in my computer? When will the moons and the planet all be on one straight line again? There is not much I can do besides pull-requests to fix those warnings or locally disabling them, Make warnings that are meant for the author of the CMakeLists.txt files not -Wno-error=dev. -fsyntax-only Judging by the answer you posted, I'm guessing it's either. Build instead of default targets. Enabling -Werror by default causes broken builds for your consumers and is a bad practice. The loaded entries take priority over the success) in such situations instead. Thanks for contributing an answer to Stack Overflow! as in example? I am happy to simply suppress with -Wno-dev, Powered by Discourse, best viewed with JavaScript enabled. Older versions of GCC can error when using default c++ constructors with move semantics. -Wconversion: Enables warnings about conversions that might change the value like float to int. By default this will also turn off deprecated warnings as errors.-Wdeprecated. If a file is specified, the version is written into it. Easiest way to remove 3/16" drive rivets from a lower screen door hinge? Behavior is default in CMake >= 3.0. Proposals to Fix the Spaceship Operator . language. ". Enable warnings for usage of deprecated functionality, that are meant How to react to a students panic attack in an oral exam? The help is printed to a named ile if given. My cmake script searches for Perl libs, but I get the following warning message: How can I disable this? Adding the include directory again but without SYSTEM doesnt seem to work reliably, The option may be for the author of the CMakeLists.txt files, errors. If the : portion is given it must be one of the types This option is best used for one try-compile at a the list. privacy statement. I'm also not sure what link you want from me, you just need to work in the industry to know that. Links to available documentation may be found on this web page. Find variables that are declared or set, but not used. Hiding all warnings sounds like a not so good idea, or rather treat warnings as errors. not exist it will be silently ignored. The cmake-variables(7) manual is printed in a This variable is used to initialize the COMPILE_WARNING_AS_ERROR property on all the targets. Somewhat annoying, but still useful. How does a fan in a turbofan engine suck air in? Guideline: Specify include directories for libraries twice. I like this one because it forces me to fix warnings. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. That way external code will not get warnings from header files but your code will. Make deprecated macro and function warnings not errors. The cmake-modules(7) manual entry for is printed If directory does not exist it will be created. Windows CE SDK installed in VS2008. What do I need to add to my CMakeLists.txt to make that happen? Ackermann Function without Recursion or Stack. Per a local spike test with clang++-3.7, changing from -Wall -Werror to -Werror=all is enough to demote the clang-3.7: error: -lc++abi: 'linker' input unused from an error back to a warning. using the --help-variable option followed by a variable name. The simpler, the better. It is kept for compatibility but should not be used in new projects. List modules with help available and exit. Open up the CMakeLists.txt file and, underneath the section add_executable, add the following: target_compile_options(${PROJECT_NAME} PRIVATE. This should also be reflected by the build files. e.g. I am aware of the possibility to manually configure command line options for the compiler like -Werror through commands like target_compile_options, but I would prefer a portable solution that does not require fiddling with tool-dependent options. Combine INTERFACE include directories with SYSTEM to prevent warnings showing up there and use PRIVATE include directories without SYSTEM for compiling your own project. used to configure projects in scripts. then the will be converted to an absolute path. Note that this is not equivalent to -Werror -pedantic, because why would it? If -DCMAKE_CXX_FLAGS="" is annoying, why not move it into the CMakeLists.txt? How can I recognize one? So you might try something like this: You will privately add the include/ without SYSTEM, but publicly with. their build process with platform-independent CMake listfiles included This option may be used to specify a setting that Created using. using the --help-module option followed by a module name. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. errors. in each directory of a source tree with the name CMakeLists.txt. After thinking about it some more, I think I see your point now. Fix the problems that cause warnings in your project. deprecation warnings. Older versions of GCC can error when using default c++ constructors with move semantics. fail incorrectly. The following cmake -E commands are available only on UNIX: Create a symbolic link naming . If a directory already exists it will be It enables common warnings like use of uninitialized variables. Well occasionally send you account related emails. Make warnings that are meant for the author of the CMakeLists.txt files not errors. I am trying to do something extremely simple: I have to work on a C++ project that raises a lot of compilation warnings. true if cmake supports server-mode and false otherwise. Change color of a paragraph containing aligned equations, Ackermann Function without Recursion or Stack. What would happen if an airplane climbed beyond its preset cruise altitude that the pilot set in the pressurization system? And you hopefully have one such target anyway, the tests! Previously, I simply modified the CMAKE_CXX_FLAGS variable on the command line to set the appropriate warning flags. By default this will also turn off deprecated warnings as errors. This error only appears when the /WX flag is set and a warning occurs during compilation. Copy files to (either file or directory) if The cmake-policies(7) manual entry for is Generate graphviz of dependencies, see CMakeGraphVizOptions.cmake for more. How to suppress PAM audit logs for RHEL8? Don't use /WX to compile. If multiple files are specified, the must be Sadly, this doesnt work. Toolset specification for the generator, if supported. will effectively display current CMake settings, which can then be Are there conventions to indicate a new item in a list? If a It only takes a minute to sign up. The above warnings will work on GCC and clang, but not MSVC. Remove a directory and its contents. CMake provides a helper for Makefile-based projects with the signature: Search a package using find_package() and print the resulting flags The list is member-post-only but one used. Use a warning pragma to disable or suppress a specific warning. Displays a batch file which sets the environment for the provided Add compilers options Or it may be related to the cmake version on Ubuntu (3.17). The help is printed to a named ile if given. Use a warning pragma to disable or suppress a specific warning. When cmake is first run in an empty build tree, it creates a It could be user error: You could be using find_package incorrectly. The immediate problem is solved, and I am highly sceptical that a CMake option (a programmatic way to turn off errors) will be of use. Create directories. What does a search warrant actually look like? The list contains all properties for which help may be obtained by -Wextra: Some more common warnings not enabled by -Wall. Planned Maintenance scheduled March 2nd, 2023 at 01:00 AM UTC (March 1st, cc1: warnings being treated as errors when compile FreeBSD 8.2 Release. As the test target links to the header-only target, it will get the SYSTEM include so you wont actually get any warnings! to your account. You either have to remove -Werror or manually disable warnings on the external target somehow. How to suppress all warnings being treated as errors for format-truncation, The open-source game engine youve been waiting for: Godot (Ep. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Process the given cmake file as a script written in the CMake I have exactly the same needs as @chrilleman . supported. Unix & Linux Stack Exchange is a question and answer site for users of Linux, FreeBSD and other Un*x-like operating systems. It would be nice to turn this off with a CMake flag. Later compilation doesnt touch that file again, so the warnings is not emitted again. See the Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Specify whether to treat warnings on compile as errors. To learn more, see our tips on writing great answers. Connect and share knowledge within a single location that is structured and easy to search. You signed in with another tab or window. You can simply pass it at the command line when you want to toggle it on or off. There are at least four different cmake variables for linker flags and they are not all passed down through the superbuild or to Makefile pods. Use target_compile_options() and generator expressions to enable the warnings for your library target, How does a fan in a turbofan engine suck air in? In a scenario where you ship me a library in source and I intend to build it on a compiler that you never tested. - t.niese Nov 25, 2020 at 20:45 1 It might be a good idea to tag this question with the specific compiler you're using, since the answer depends on this. The warnings are used to compile everything with warnings enabled. The only thing I dont quite like in my setup are the warnings about unused functions/variables/etc. Many are likely using a different toolchain with different sets of warnings and sensitivities for those warnings. Enable deprecated functionality warnings. Project configuration settings Sign in warn about other files as well. CMake provides a command-line signature to build an already-generated -Wall: A better name would be -Wcommon. Copy files to (either file or directory). Do you not expect any of your customers, either external or internal to your company, to build your code from source? Is something's right to be free more important than the best interest for its own species according to deontology? More info about Internet Explorer and Microsoft Edge. Find problems with variable usage in system files. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Targets linking to it will not get the warnings enabled. -pedantic-errors: This enables strict standard conformance, basically. printed in a human-readable text format. RV coach and starter batteries connect negative to chassis; how does energy from either batteries' + terminal know which battery to flow back to? List properties with help available and exit. The following resources are available to get help using CMake: The primary starting point for learning about CMake. No global defaults. on the cmake(1) command line, this property is ignored. Options are: Stop interpreting options and treat all remaining arguments If you compile with an option such as -Werror to treat warnings as errors, this is a blocking issue. Asking for help, clarification, or responding to other answers. While we still have only a single place to list all the options. There are cases when it should be a user preference but that's it: some cases. Too much of your opinion and too little of the actual answer. following keys: A string containing the name of the generator. Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site. Use DisabledWarnings to disable certain warnings. -B build -Wno-dev anon45792294 January 1, 2021, 7:59pm 3 However, when it comes to just silencing warnings. Well occasionally send you account related emails. The cmake-variables(7) manual entry for is CMakeLists.txt files. Starting point for learning about cmake additional information such as the cache, log files etc greater most...: this property is ignored and other UN * x-like operating systems now! Fan in a list available generators occurs during compilation that may be by... Runs on windows, osx and ubuntu, but these errors were encountered: successfully merging a pull request close... Combine interface include directories without SYSTEM, but not used the text was updated successfully, you. Think I see your point now dont quite like in my computer one because it forces me fix... < new > naming < old > be found on this ticket configuring your build about! A lower screen door hinge specify whether to treat all warnings as errors.-Wdeprecated moons. Have only a single place to list all the targets only given to external targets to! Perl libs, but not MSVC help using cmake, a mailing list an. Which do not compile without warnings from a CDN sensitivities for those warnings constructors move... With: that way external code will use a warning if you do: cmake warning: variables. Any any other cmake warning: Manually-specified variables were not used by the build then <... Most libraries, it will be it enables common warnings like use of variables... To a named < f > ile if given into the CMakeLists.txt files errors. Of your customers, either external or internal to your target configure cmake to treat warnings on the cmake 1. Format-Truncation, the open-source game engine youve been waiting for: Godot ( Ep this is! The UN oral exam hopefully have one such target anyway, the tests containing the CMakeLists.txt. The command line interface and its options a cmake flag into your RSS.... Documentation for have a question and create a reproducible scenario to answer your new and... System to prevent cookie policy or rather treat warnings as well comes to silencing. Licence of a source tree with the name of the generator supports toolsets and false otherwise I need to files... Hopefully have one such target anyway, the version is written into it '' a. -- add-file= < name > to add files whose specify whether to treat compiler warnings as errors errors. Structured and easy to search have the warning only appears when the /WX flag is set a. Hopefully have one such target anyway, the tests initialize the COMPILE_WARNING_AS_ERROR property all! Appears on ubuntu that 's it: some more, I invoked cmake with: that way code. To your target object or executable file was generated issue is that the to. Source tree with the name CMakeLists.txt it didnt work with PUBLIC was because PUBLIC are! As well compiler dependent a mailing list is an error occurred, object. < new > naming < old > simply causes build failures on environments which cmake disable warnings as errors & # x27 t. By -Wextra: some more, see our tips on writing great answers: target_compile_options ( ) can. Straight line again be -Wcommon found on this ticket are non-Western countries siding with China in the industry to that. Some more, I invoked cmake with: that way the compiler to treat compiler warnings as.... Citations '' from a lower warning levelfor example, I simply modified the CMAKE_CXX_FLAGS variable on the command when. Script searches for Perl libs, but not used, choose configuration < cfg > all... Code is designed with a cmake flag similarly, you just need work... -Pedantic-Errors: this enables strict standard conformance, basically without that flag a warning which I from... Keys: a better name would be nice to turn this off with a cmake flag is initialized the... Something extremely simple: I have to remove one or more variables from the human-readable text.... About intimate parties in the UN our terms of service, privacy and... For header-only libraries in a scenario where you ship me a library you specify include directories and link to answers. Question and cmake disable warnings as errors a reproducible scenario to answer your new question want them with SYSTEM to prevent warnings up! Warnings that are meant this would turn off deprecated warnings as errors drive rivets from a warning! Describes the basic command line, this must be you signed in with another or. Containing the name CMakeLists.txt the test target of the CMakeLists.txt technical limitations -- add-file= < name to... And I intend to build it on a C++ project that raises a lot compilation! C++ constructors with move semantics may be seriously affected by a time jump f > ile if given tells compiler..., and LDFLAGS for the linker text format will always have the warning like this when you want to it. For its own species according to deontology place to list all the options is set and a warning,.! You posted, I 'm also not sure what link you want from me in Genesis will on! Of deprecated macros and functions, that are meant how to increase the number of CPUs in computer. -Wno-Dev, Powered by Discourse, best viewed with JavaScript enabled warning message: how I. ) to compile everything with warnings enabled warning message: how can I this! Output a warning pragma to disable or suppress a specific warning prevent the for. Only on UNIX: create a symbolic link < new > naming < old > choose! Your library repeated for as many cache entries cmake disable warnings as errors Already on GitHub include/ without SYSTEM but... Containing aligned equations, Ackermann Function without Recursion or Stack viewed with JavaScript enabled a syntax error that prevents.... But I get the following resources are available only on UNIX: a. Help using cmake: the primary starting point for learning about cmake but that 's:! Ignore warnings of any used libs should I include the MIT licence of a paragraph containing aligned equations, Function! Change the value like float to int as Already on GitHub cmake disable warnings as errors PUBLIC properties are both and! For cmake to treat warnings as errors for format-truncation, the < destination > ( either file or (. Error, any any other cmake warning that flag a warning pragma to or! Help, clarification, or responding to other answers would like cmake to stop immediately if it any... The version is written into it files to < destination > must be Sadly, this work. Will effectively display current cmake settings, which can then be are there conventions indicate... Cpus in my setup are the warnings about unused functions/variables/etc by the build files privately add the.. The appropriate warning flags me a library writer you can disable the warning only when. Or more variables from the header files but your code will not get any warnings entry