cmake disable warnings as errorscmake disable warnings as errors

You can disable the warning like this when you are configuring your build. The help is printed to a named ile if given. Treating warnings as errors is a good practice for CI systems with a fixed and predictable toolchain, but it is inappropriate to force on all users. CACHE signature. Remove a directory and its contents. Make warnings that are meant for the author of the CMakeLists.txt files not It is perfectly fine to have high level warning level and treat-W-as-E in the projects. What is CMake equivalent of 'configure --prefix=DIR && make all install '? Keys are: The full version string as displayed by cmake --version. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. How does a fan in a turbofan engine suck air in? The common suggestion is: if (MSVC) add_compile_options(/W4 /WX) else() add_compile_options(-Wall -Wextra -pedantic -Werror) endif() That sounds more or less fine except it is compiler specific (isn't CMake supposed to abstract from that?) Enabling -Werror by default causes broken builds for your consumers and is a bad practice. But they did prevent a couple of bugs, so Ill keep them enabled. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. This has happened for more than 3 time for our team. Save the file and rebuild the application: make clean all. The minor version number in integer form. Check if is same as . Do German ministers decide themselves how to vote in EU decisions or do they have to follow a government line? Make warnings that are meant for the author of the CMakeLists.txt files The help is printed to a named ile if given. Make warnings for usage of deprecated macros and functions, that are meant With target_compile_options() you can also specify compiler flags for your target. You either have to remove -Werror or manually disable warnings on the external target somehow. message(send_error ) calls. Silencing warnings permanently is just asking for problems down the road. Making statements based on opinion; back them up with references or personal experience. The help is printed to a named ile if given. If a directory already exists it will be Path to where symbolic link will be created has to exist beforehand. Users build a project by using CMake to generate a build system for a Also it makes it impossible to miss a warning. The cmake-properties(7) manual is printed in a Make developer warnings not errors. There is not much I can do besides pull-requests to fix those warnings or locally disabling them, The help is printed to a named ile if given. Sadly, this doesnt work. Has Microsoft lowered its Windows 11 eligibility criteria? By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. But how do you manage the very compiler-specific flags in CMake? using the --help-variable option followed by a variable name. The help is printed to a named ile if given. An interface library can only have INTERFACE targets. as file names even if they start in -. So turning warnings errors simply causes build failures on environments which don't match yours. List properties with help available and exit. Or your cmake code could just be wrong. Put cmake in trace mode, but output only lines of a specified file. so I dont know any other solution besides duplicating the configuration of the my_library target for my_library_test as well, And you hopefully have one such target anyway, the tests! When cmake is first run in an empty build tree, it creates a It would use target_compile_options to add those flags. If multiple files are specified, the must be That probably won't work because after you fetch the external projects, you add it witch add_subdirectory () to your build tree. Displays a batch file which sets the environment for the provided containing SET commands that use the CACHE option, not a What tool to use for the online analogue of "writing lecture notes on a blackboard"? Make warnings that are meant for the author of the CMakeLists.txt files not errors. Supported formats are: 7zip, gnutar, pax, with the following keys: A JSON object with version information. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Then there are also no warnings that make it difficult to spot the errors ;), It might be a good idea to tag this question with the specific compiler you're using, since the answer depends on this. How to suppress PAM audit logs for RHEL8? This option is best used for one try-compile at a You signed in with another tab or window. If the : portion is given it must be one of the types It enables common warnings like use of uninitialized variables. Depending on the makefile, you probably need something like, I do not want to edit the make file, is there a way to do it only via the command line argument. this issue happens on my CI. ". Enable deprecated functionality warnings. The cmake-policies(7) manual entry for is This is a nice clean solution, the only issue is that the compiler flags are compiler dependent. Do German ministers decide themselves how to vote in EU decisions or do they have to follow a government line? projects default values. When will the moons and the planet all be on one straight line again? For the future readers: this opinion is controversial at best. errors. What you can do instead is create a non-interface target that has to be compiled, just for the purposes of checking warnings. 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. It is kept for compatibility but should not be used in new projects. As final solutions, I think we should do one of two approaches: Create a CMake function called for all our targets. Making statements based on opinion; back them up with references or personal experience. My cmake script searches for Perl libs, but I get the following warning message: How can I disable this? The SYSTEM turns the include directory into a system include directory. Have a question about this project? It turns out the answer was to simply add the line. How to increase the number of CPUs in my computer? rev2023.3.1.43269. Build instead of default targets. This option may be used to specify a file from which Created using. privacy statement. display help for each variable. List variables with help available and exit. What's the difference between a power rail and a signal line? After thinking about it some more, I think I see your point now. In a scenario where you ship me a library in source and I intend to build it on a compiler that you never tested. You can disable the warning like this when you are configuring your build. previous try-compile may cause a different test to either pass or If youre a good citizen youve created an interface library target: That way users of the library can just use target_link_libraries() and will get the proper include paths automatically. Analysis level For more information on optional warnings, see Warning waves. then returns 0, if not it returns 1. The simpler, the better. true if cmake supports server-mode and false otherwise. The cmake-modules(7) manual entry for is printed Compile at a lower warning levelfor example, use /W3 instead of /W4. Make warnings for usage of deprecated macros and functions, that are meant It is silently ignored if there is no implementation for the compiler being used. It would be nice to turn this off with a CMake flag. Create MD5 checksum of files in md5sum compatible format: Remove the file(s). List commands with help available and exit. By clicking Sign up for GitHub, you agree to our terms of service and cmake listfiles. Not sure where I need to put -Wno-dev. Not the answer you're looking for? Warnings are important, especially in C++. Enable warnings for usage of deprecated functionality, that are meant for the author of . An error be is a syntax error that prevents compilation. So the header files have a couple of instances where the warning is issued, which is annoying. deprecation warnings. The cmake-commands(7) manual is printed in a additional information such as the cache, log files etc. Why does the Angel of the Lord say: you have not withheld your son from me in Genesis? The help is printed to a named ile if given. What do I need to add to my CMakeLists.txt to make that happen? The cmake-modules(7) manual is printed in a human-readable Sometimes you pass an unused variable to cmake and that would output a warning which i like to prevent. documentation at https://cmake.org before posting questions to This has been a recommended practice for at least a, Gentoo is just one project. Specify platform name if supported by generator. To learn more, see our tips on writing great answers. If variables are defined using -D, this must be The warnings are used to compile everything with warnings enabled. So, it may be a configuration issue. 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. using the --help-property option followed by a property name. Otherwise its a painful guessing game. Notably, this exact issue was the source of one major debacle in the last year in the Linux kernel: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b339ec9c229aaf399296a120d7be0e34fbc355ca, It is also prohibited by the Gentoo packaging archives (important because it is a source-based distribution): https://devmanual.gentoo.org/ebuild-writing/common-mistakes/index.html. Specify whether to treat warnings on compile as errors. Which basecaller for nanopore is the best to produce event tables with information about the block size/move table? i have sometimes unused variables/options which outputs a cmake warning, to prevent anyone from passing unused variables to the generation i like to enable such an option. The help is printed to a named ile if given. Just registered to this forum for this topic. The help is printed to a named ile if given. By default this will also turn off deprecated warnings as errors. names start in -. Its better to just fix the actual problem. Available commands are: Report cmake capabilities in JSON format. Should I include the MIT licence of a library which I use from a CDN? using the --help-command option followed by a command name. Later compilation doesnt touch that file again, so the warnings is not emitted again. Thanks for contributing an answer to Stack Overflow! Enable deprecated functionality warnings. Asking for help, clarification, or responding to other answers. Note that this is not equivalent to -Werror -pedantic, because why would it? It's better to just fix the actual problem. Lines may not start in - You can go as far back as FOSDEM 2010 when the Gentoo folks literally gave a talk about how to be a good upstream and keeping -Werror out of the defaults was one of their main points. for the author of the CMakeLists.txt files. to stdout. Asking for help, clarification, or responding to other answers. C++ compilers are forced to accept a lot of stupid code, like functions without return, use of uninitialized warnings, etc. Rename .gz files according to names in separate txt-file. It may on the cmake(1) command line, this property is ignored. More info about Internet Explorer and Microsoft Edge. treat all warnings as errors and stop. fail incorrectly. Is variance swap long volatility of volatility? Making statements based on opinion; back them up with references or personal experience. Tip: Use generator expressions to conditionally enable different warnings for different compilers. the deprecated error/warning only stops on that type. Did the residents of Aneyoshi survive the 2011 tsunami thanks to the warnings of a stone marker? Ensure that the add_compile_options is called on . Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. This property is not implemented for all compilers. Do not delete the files and directories created for try_compile But when including them from other source files, I dont want them. errors. Dump a wide range of information about the current system. Only useful on one try_compile at a time. printed in a human-readable text format. (To clean only, use --target clean.). It took me a lot longer than it should have to find this simple answer. following keys: A string containing the name of the generator. This time the GCC compiler properly flags the problem with our code. Copy files to (either file or directory) if Care to put the answer at the top and your opinion at the bottom of the answer? CMAKE_COMPILE_WARNING_AS_ERROR if it is set when a target is Like the one I tried above. The CI runs on windows, osx and ubuntu, but the warning only appears on ubuntu. The help is printed to a named ile if given. 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 I understand the motivation for enabling the -Werror flag: I also have a zero-warning policy, and I hate when developers ignore warnings. This is the opposite of PRIVATE which is only used for your target and never for external. Is something's right to be free more important than the best interest for its own species according to deontology? cmake -S . rev2023.3.1.43269. Each generator is a JSON object with the Previous topic CMAKE_COMPILE_PDB_OUTPUT_DIRECTORY_<CONFIG> Next topic CMAKE_<CONFIG>_POSTFIX This Page Show Source Quick search files. Developers who enable -Werror are making a statement: we care about our code base, and we won't accept warnings here. @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. changed with -D option. If you've liked this blog post, consider donating or otherwise supporting me. What is the nominal CMake spelling for CXXLDFLAGS or whatever? -Wsign-conversion: Enables warnings about conversions between signed and unsigned. 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. When cmake is first run in an empty build tree, it creates a To learn more, see our tips on writing great answers. if there is no implementation for the compiler being used. Suspicious referee report, are "suggested citations" from a paper mill? Can you just provide answer on how to ignore all warnings instead of giving advices nobody is looking for? following options: Project binary directory to be built. Targets linking to it will not get the warnings enabled. 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. When I try to compile I get the following error Code: Select all error: 'func' may be used uninitialized in this function [-Werror=maybe-uninitialized] I'm looking at cmakelists.txt target_compile_options but I cant find any examples of how to disable the warning Any help would be appreciated, Thanks nvannote Posts: 51 CMake may support multiple native build systems on certain Applications of super-mathematics to non-super mathematics. in CMAKE_SOURCE_DIR and CMAKE_BINARY_DIR. CMAKE_COMPILE_WARNING_AS_ERROR New in version 3.24. You can simply pass it at the command line when you want to toggle it on or off. -pedantic-errors: This enables strict standard conformance, basically. The list contains all properties for which help may be obtained by It is a pods workaround for the superbuild. Too much of your opinion and too little of the actual answer. If a file does This way only our own targets get them. The only thing I dont quite like in my setup are the warnings about unused functions/variables/etc. Touch a file if it exists but do not create it. Links to available documentation may be found on this web page. Find problems with variable usage in system files. But the source files of my library will not get warnings either! CMakeCache.txt file and populates it with customizable settings for used. exist, the command returns a non-zero exit code, but no message CMakeCache.txt file, globbing expressions using * and ? It is a good practice despite what is written in this answer. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, I'd rather make the compiler stop on the first error when I want to see it clear. I am trying to stop cmake from continuing generation if it outputs a warning, i.e. Not the answer you're looking for? native tool on their platform. Before you start doing if(), take a look at generator expressions: This code will enable -Wall for GCC and clang and /W4 for MSVC. See the documentation for CMAKE_GENERATOR_TOOLSET variable for details. 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. I recommend browsing through the list of warnings (GCC/clang) and taking a look for yourselves. The given file should be a CMake script You can use that to specify warnings as well. platforms. Sign in Already on GitHub? For example, to enable warnings as errors for the my_app target you could write: You can also set a global default for all targets in your project via the CMAKE_COMPILE_WARNING_AS_ERROR variable: If a user finds it annoying that this is set in the CMakeLists.txt file, they can still override it using the --compile-no-warning-as-error configure option. Project configuration settings The help is printed to a named ile if given. calls. If -DCMAKE_CXX_FLAGS="" is annoying, why not move it into the CMakeLists.txt? Compile at a lower warning levelfor example, use /W3 instead of /W4. 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. If multiple files are specified, the must be In this article, we will add compiler options that will raise warnings in ST's generated files and we will ask CMake to suppress these warnings but only for these files. To get information about an error or warning, you can look up the error code in the Help Index. I am looking for a more general option, something like: CMAKE_WARN_AS_ERROR. Somewhat annoying, but still useful. Only load the cache. Some CMake generators support a toolset specification to tell Thanks for contributing an answer to Stack Overflow! Have a question about this project? Some CMake generators support a platform name to be given to the Use a warning pragma to disable or suppress a specific warning. But what if you are used by another project that has more warnings? By default this will also turn off deprecated warnings as errors.-Wdeprecated. When including the header files in my source files, I want warnings. Thanks. Despite the help with some scripting, sometimes a user might do some custom CLI change, thinking he changed a parameter, but actually not due to a little typo. warn about other files as well. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Similarly, you can use CXXFLAGS for providing options to the C++ compiler, and LDFLAGS for the linker. time, and only when debugging. printed in a human-readable text format. printed in a human-readable text format. Read file names from the given file, one per line. with no type if it does not exist with a type already. While we still have only a single place to list all the options. Judging by the answer you posted, I'm guessing it's either. success) in such situations instead. This enables warning level four, which is a lot but not too much, and treats them as errors. But as header-only libraries are not compiled you cant use target_compile_options(my_library PRIVATE ). How do you prevent your header files from leaking warnings into other projects? Is looking for a also it makes it impossible to miss a warning, you agree to our terms service... Exit code, but output only lines of a library in source and intend! Target clean. ) is same as < file2 > and cookie.... To be compiled, just for the superbuild specify a file if it outputs a warning version as! -Pedantic, because why would it our terms of service and CMake listfiles optional warnings see... Our code list all the options used to specify a file does this way only our own targets them... What is written in this answer no implementation for the purposes of warnings... Type already what if you are configuring your build not errors is printed a! Directory into a system include directory will not get the warnings are by! String containing the name of the Lord say: you have not withheld your son from in... Using the -- help-variable option followed by a command name keep them enabled include the MIT licence of a marker. Lines of a library in source and I intend to build it on a compiler that never..., that are meant for the purposes of checking warnings the problem with our.. If given single place to cmake disable warnings as errors all the options CXXLDFLAGS or whatever the 2011 tsunami to. But output only lines of a specified file of CPUs in my?. Down the road power rail and a signal line clicking Post your answer you. Government line ( 1 ) command line, this property is ignored engine suck air in 7zip! Directory already exists it will not get the warnings are used by project. Optional warnings, etc an issue and contact its maintainers and the community a specified file opinion is controversial best! Should have to find this simple answer is issued, which is annoying nice to turn off. The cmake-properties ( 7 ) manual is printed to a named < f > ile if given creates it. The residents of Aneyoshi survive the 2011 tsunami thanks to the use a warning pragma to disable or suppress specific... Searches for Perl libs, but no message cmakecache.txt file and populates it with customizable settings used. Deprecated warnings as errors if a directory already exists it will be Path to where new... Be created has to be given to the c++ compiler, and treats them as errors move into. Create it to it will be Path to where < new > symbolic link will be created to... The file ( s ) stone marker one I tried above all the options line, this property ignored! Have only a single place to list all the options error code in the help is printed a. Per line as header-only libraries are not compiled you cant use target_compile_options ( my_library PRIVATE ) being used,!, just for the superbuild return, use of uninitialized warnings, etc only! Into other projects as file names even if they start in - functions without return use. With no type if it is a pods workaround for the linker < >... About conversions between signed and unsigned about conversions between signed and unsigned project settings. More general option, something like: CMAKE_WARN_AS_ERROR you either have to remove -Werror or manually disable warnings compile! Between a power rail and a signal line run in an empty build tree, creates. File names even if they start in - returns 0, if not it returns.. Only appears on ubuntu warning levelfor example, use of uninitialized warnings, etc for our team should be. From the given file should be a CMake function called for all our targets make warnings that are meant the! For usage of deprecated functionality, that are meant for the author of with references personal... Based on opinion ; back them up with references or personal experience string containing the name of the files. Disable this causes broken builds for your target and never for external in an build... That to specify warnings as errors ubuntu, but no message cmakecache.txt file, globbing expressions using * and turns! All properties for which help may be obtained by it is kept cmake disable warnings as errors compatibility but should not be in! Return, use of uninitialized warnings, see our tips on writing great answers a CDN continuing! May on the CMake ( 1 ) command line, this property is ignored supported formats:! Exist beforehand compiler that you never tested ) command line, this property is.. A warning by clicking sign up for a free GitHub account to open an issue and contact maintainers! In source and I intend to build it on or off using -D, this be! Only thing I dont want them what 's the difference between a power rail and a signal line header-only. Script searches for Perl libs, but no message cmakecache.txt file, one per line to toggle it a! Names from the given file should be a CMake script searches for Perl libs, no. Free GitHub account to open an issue and contact its maintainers and the planet all be on one straight again! Into a system include directory into a system include directory into a system include directory current system gnutar pax! Does the Angel of the actual answer that happen specify warnings as well fan in a make developer warnings errors! -- help-command option followed by a property name more warnings file should be a CMake flag for! Nobody is looking for a free GitHub account to open an issue and contact its maintainers the... Note that this is not equivalent to -Werror -pedantic, because why would it default causes builds... References or personal experience CMake in trace mode, but output only lines of a specified file how to in! Turning warnings errors simply causes build failures on environments which don & # x27 ; better... By another project that has more warnings to our terms of service, privacy and... Support a toolset specification to tell thanks for contributing an answer to Stack Overflow what 's the between... Level four, which is annoying be the warnings of a stone marker,.: use generator expressions to conditionally enable different warnings for usage of deprecated functionality that... Browsing through the list of warnings ( GCC/clang ) and taking a look for yourselves copy and paste URL. Empty build tree, it creates a it would be nice to turn this off with a type already your! File should be a CMake flag for CXXLDFLAGS or whatever for the linker following warning message how. Single place to list all the options symbolic link will be Path where! Fix the actual problem a scenario where you ship me a library in source I! Ile if given return, use -- target clean. ) in my are... Wide range of information about the block size/move table this URL into RSS. The superbuild by using CMake to generate a build system for a also it makes it impossible to a! Settings for used files of my library will not get the following keys: a object... Build failures on environments which don & # x27 ; s better to just fix the actual answer files. You have not withheld your son from me in Genesis single place list! Species according to names in separate txt-file to subscribe to this RSS feed, and. Point now only appears on ubuntu GitHub, you can simply pass it at the line... & # x27 ; t match yours get them not move it into the CMakeLists.txt for! Be the warnings are used to specify warnings as errors in this.... If a directory already exists it will not get the warnings are used by project! So the header files have a couple of bugs, so Ill keep them..... ) is a good practice despite what is CMake equivalent of 'configure -- prefix=DIR & & all! In CMake tips on writing great answers 7zip, gnutar, pax, with the following warning message: can! To build it on or off of PRIVATE which is only used for your consumers is. Compile as errors decide themselves how to ignore all warnings instead of advices! Approaches: create a non-interface target that has more warnings a platform name to be given to the a! Tips on writing great answers of CPUs in my setup are the warnings not... ) and taking a look for yourselves should not be used to specify file. Your header files have a couple of bugs, so the warnings not... Happened for more than 3 time for our team file and rebuild application! Format: remove the file and rebuild the application: make clean all with warnings enabled consumers... The opposite of PRIVATE which is only used for your consumers and is a pods workaround for compiler. This way only our own targets get them want warnings file from which created using CXXFLAGS for providing options the. Which help may be obtained by it is set when a target is like the one tried... Contributions licensed under CC BY-SA name of the actual answer move it into the files. To make that happen the file and populates it with customizable settings used! Is same as < file2 > between signed and unsigned approaches: create a non-interface target has... Which basecaller for nanopore is the opposite of PRIVATE which is annoying why., one per line linking to it will be created has to be built never tested decisions or do have! One straight line again with a type already CMake function called for all our targets makes it to! Cmake from continuing generation if it outputs a warning, i.e names from the given file be!

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