Remove a directory and its contents. 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?) - 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 cmake-policies(7) manual entry for is The help is printed to a named ile if given. For multi-configuration tools, choose configuration . using the --help-variable option followed by a variable name. It would be nice to turn this off with a CMake flag. The cmake-modules(7) manual is printed in a human-readable So an external project linking my_library will not get any warnings from the header files of my library. Keys are: The full version string as displayed by cmake --version. -B build -Wno-dev anon45792294 January 1, 2021, 7:59pm 3 However, when it comes to just silencing warnings. language. The help is printed to a named ile if given. -fsyntax-only the deprecated error/warning only stops on that type. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. This property is not implemented for all compilers. The simpler, the better. Do not actually run configure and generate Thanks for contributing an answer to Stack Overflow! done before the -P argument. warning treated as error - no object file generated. The list contains all commands for which help may be obtained by Thanks for contributing an answer to Unix & Linux Stack Exchange! What are examples of software that may be seriously affected by a time jump? List variables with help available and exit. Copy directories to directory. additional information such as the cache, log files etc. Sometimes you pass an unused variable to cmake and that would output a warning which i like to prevent. The above warnings will work on GCC and clang, but not MSVC. Making statements based on opinion; back them up with references or personal experience. silently ignored. For example, I compile with -Wconversion but my dependencies dont. Displays arguments as text but no new line. printed in a human-readable text format. to your account. Usage describes the basic command line interface and its options. How does a fan in a turbofan engine suck air in? This should also be reflected by the build files. Making statements based on opinion; back them up with references or personal experience. -Wall -Wextra -Wpedantic. ) to your account. human-readable text format. printed in a human-readable text format. By default this will also turn off This property is not implemented for all compilers. This flag tells CMake to The cmake-modules(7) manual entry for is printed display also advanced variables. following keys: A string containing the name of the generator. Can you just provide answer on how to ignore all warnings instead of giving advices nobody is looking for? @david-german-tri Let's DM about who is going to take on this ticket. Later compilation doesnt touch that file again, so the warnings is not emitted again. Enable deprecated functionality warnings. This can be configured in CMake version 3.24 and higher via the COMPILE_WARNING_AS_ERROR target property. CMakeGraphVizOptions.cmake for more details. When will the moons and the planet all be on one straight line again? Hiding all warnings sounds like a not so good idea, or rather treat warnings as errors. The CI runs on windows, osx and ubuntu, but the warning only appears on ubuntu. Lets close this post by talking about a list of warnings you should enable. Thanks. Sadly, this doesnt work. So, it may be a configuration issue. When and how was it discovered that Jupiter and Saturn are made out of gas? How can I silence the warning if this is happening inside the cmake find_package code for PerlLibs ? Don't use /WX to compile. The cmake-commands(7) manual entry for is treat all warnings as errors and stop. The given file should be a CMake script Build instead of default targets. 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. C++ compilers are forced to accept a lot of stupid code, like functions without return, use of uninitialized warnings, etc. but as a library writer you can prevent the issue for projects with you as a dependency. Use a warning pragma to disable or suppress a specific warning. in more variables being created. CMAKE_COMPILE_WARNING_AS_ERROR if it is set when a target is Users build a project by using CMake to generate a build system for a If multiple files are specified, the must be UNIX is a registered trademark of The Open Group. RV coach and starter batteries connect negative to chassis; how does energy from either batteries' + terminal know which battery to flow back to? The option may be CMAKE_GENERATOR_TOOLSET variable for details. To learn more, see our tips on writing great answers. Ignored. In gcc and clang, only turn on -Werror for warnings covered by -Wall, build: cmake: ability to disable -Werror* (-Werror considered harmful). using the --help-policy option followed by a policy name. if you do: cmake -DMY_UNUSED_VAR=true it will output Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. to load cache entries before the first pass through the projects The cmake-commands(7) manual is printed in a for the author of the CMakeLists.txt files, not errors. Or it may be related to the cmake version on Ubuntu (3.17). Do German ministers decide themselves how to vote in EU decisions or do they have to follow a government line? Do not delete the try_compile build tree. Created using. 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. zero exit code (i.e. created. The -f option changes the behavior to return a Why does my Makefile not compile and how can I fix it? 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. My cmake script searches for Perl libs, but I get the following warning message: How can I disable this? Wildcards are not supported. Supported formats are: 7zip, gnutar, pax, List cache variables will run CMake and list all the variables from I am trying to build my source using gcc 8.3.0. Remove matching entries from CMake cache. 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. Find centralized, trusted content and collaborate around the technologies you use most. When prototyping you often have incomplete code which you cant compile, because a function isnt used. I'd like to thus propose closing this issue. The help is printed to a named ile if given. @Karthik, muru gave you the command line: @muru, your comment sounds like the answer here; would you mind providing it as such? This way only our own targets get them. It is a good practice despite what is written in this answer. exist, the command returns a non-zero exit code, but no message The help is printed to a named ile if given. I am looking for a more general option, something like: CMAKE_WARN_AS_ERROR. is not modified. The trick is to use target_include_directories(my_library SYSTEM PUBLIC include/). You can use that to specify warnings as well. How to increase the number of CPUs in my computer? CACHE signature. Is email scraping still a thing for spammers, Applications of super-mathematics to non-super mathematics. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. A list of strings with all the extra generators compatible with Not the answer you're looking for? Create directories. If the cmake --compile-no-warning-as-error option is given on the cmake (1) command line, this property is ignored. Why was the nose gear of Concorde located so far aft? Speaking as someone who regularly uses top-of-tree compiler builds, where warnings break frequently, hard-coded warnings-as-errors is a blight. Asking for help, clarification, or responding to other answers. The help is printed to a named ile if given. following options: Project binary directory to be built. They have an awkward set of linker flags to link to a specially built libc++. Show program name/version banner and exit. Cite a source instead of ad-hom-ing me. The help is printed to a named ile if given. human-readable text format. the deprecated error/warning only stops on that type. To fix, use one of the following techniques. Some CMake generators support a toolset specification to tell How do I disable g++ displaying notes for errors? this issue happens on my CI. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Suppress deprecated functionality warnings. Compilers will not issue warnings from header files originating from there. You can disable the warning like this when you are configuring your build. Sign in Launching the CI/CD and R Collectives and community editing features for Overriding a default option() value in CMake from a parent CMakeLists.txt. is there a chinese version of ex. Specify whether to treat warnings on compile as errors. Read file names from the given file, one per line. Rename .gz files according to names in separate txt-file. Projects specify projects default values. provided at cmake@cmake.org. paxr (restricted pax, default), and zip. 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. Suppress warnings that are meant for the author of the By default this will also turn on deprecation warnings. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. What happened to Aham and its derivatives in Marathi? Developers who enable -Werror are making a statement: we care about our code base, and we won't accept warnings here. The help is printed to a named ile if given. And it is sometimes useful when developing to have this option, anyway. How to increase the number of CPUs in my computer? This has been a recommended practice for at least a, Gentoo is just one project. Why does the Angel of the Lord say: you have not withheld your son from me in Genesis? It is perfectly fine to have high level warning level and treat-W-as-E in the projects. The help is printed to a named ile if given. If enabled, adds a flag to treat warnings on compile as errors. This option may be used to specify a file from which Make deprecated macro and function warnings errors. -pedantic-errors: This enables strict standard conformance, basically. files. 9 comments Contributor on May 23, 2016 configuration: linux configuration: mac label mentioned this issue In gcc and clang, only turn on -Werror for warnings covered by -Wall #2437 jamiesnape closed this as completed on May 26, 2016 I think this is problematic, because your code is designed with a certain warning level in mind. Options are: Stop interpreting options and treat all remaining arguments The list contains all policies for which help may be obtained by That way external code will not get warnings from header files but your code will. @AlexReinking That depends on the project. By clicking Sign up for GitHub, you agree to our terms of service and Specify the format of the archive to be created. CMake provides builtin command-line tools through the signature: Run cmake -E or cmake -E help for a summary of commands. Suppress warnings for usage of deprecated functionality, that are meant calls. The reason it didnt work with PUBLIC was because public properties are both PRIVATE and INTERFACE. Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Specify platform name if supported by generator. So you might try something like this: You will privately add the include/ without SYSTEM, but publicly with. Similarly, you can use CXXFLAGS for providing options to the C++ compiler, and LDFLAGS for the linker. 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. Linux is a registered trademark of Linus Torvalds. ". human-readable text format. Let's fix that. There is not much I can do besides pull-requests to fix those warnings or locally disabling them, so I dont know any other solution besides duplicating the configuration of the my_library target for my_library_test as well, -Wsign-conversion: Enables warnings about conversions between signed and unsigned. containing SET commands that use the CACHE option, not a Powered by Discourse, best viewed with JavaScript enabled. fail incorrectly. 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. An interface library can only have INTERFACE targets. native tool on their platform. Connect and share knowledge within a single location that is structured and easy to search. The following cmake -E commands are available only on UNIX: Create a symbolic link naming . Windows CE SDK installed in VS2008. List policies with help available and exit. 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. projects (via share/aclocal/cmake.m4). they have changed. Guideline: Specify include directories for libraries twice. But when including them from other source files, I dont want them. Well occasionally send you account related emails. If you compile with an option such as -Werror to treat warnings as errors, this is a blocking issue. Displays a batch file which sets the environment for the provided So the header files have a couple of instances where the warning is issued, which is annoying. Do not delete the files and directories created for try_compile It turns out the answer was to simply add the line. Put cmake in trace mode, but output only lines of a specified file. A bool that is set if the cmake build is from a dirty tree. Only load the cache. 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. The warnings are used to compile everything with warnings enabled. Enable warnings for usage of deprecated functionality, that are meant using the --help-manual option followed by a manual name. The major version number in integer form. Sign in As the test target links to the header-only target, it will get the SYSTEM include so you wont actually get any warnings! Just registered to this forum for this topic. For GCC/clang I usually have the following set of warnings: -Werror: Treat warnings as errors. Economy picking exercise that uses two consecutive upstrokes on the same string. 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. for the author of the CMakeLists.txt files. The MSan builds, in particular. This enables warning level four, which is a lot but not too much, and treats them as errors. List modules with help available and exit. The help is printed to a named ile if given. This can be used to use cmake instead of pkg-config to find When including the header files in my source files, I want warnings. Care to put the answer at the top and your opinion at the bottom of the answer? See the You signed in with another tab or window. If you know anything, please let me know. 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. Tip: For header-only libraries enable warnings on the test target of the library. As final solutions, I think we should do one of two approaches: Create a CMake function called for all our targets. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. The help is printed to a named ile if given. platforms. Behavior is default in CMake >= 3.0. with no type if it does not exist with a type already. Many are likely using a different toolchain with different sets of warnings and sensitivities for those warnings. using the --help-property option followed by a property name. Generate graphviz of dependencies, see CMakeGraphVizOptions.cmake for more. Using CMake, how do I get verbose output from CTest? How to react to a students panic attack in an oral exam? Are there conventions to indicate a new item in a list? It is kept for compatibility but should not be used in new projects. An error be is a syntax error that prevents compilation. Already on GitHub? To learn more, see our tips on writing great answers. To get information about an error or warning, you can look up the error code in the Help Index. But the source files of my library will not get warnings either! supported. Blank lines are ignored. If multiple files are specified, the must be cmake -S . Looking for a 'cmake clean' command to clear up CMake output, All warnings as errors with the Eclipse Java compiler (3.6.2). 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 The help is printed to a named ile if given. Without that flag a warning is generated when compiling, but you might miss it. Change the current working directory and run a command. Is the Dragonborn's Breath Weapon from Fizban's Treasury of Dragons an attack? What is the nominal CMake spelling for CXXLDFLAGS or whatever? It may Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. I have exactly the same needs as @chrilleman . Since the option is set via a target property and those do not propagate to dependent targets, I don't see an issue where my decision to enforce. You can simply pass it at the command line when you want to toggle it on or off. display help for each variable. 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. Summary of commands for CXXLDFLAGS or whatever does a fan in a turbofan engine air. If the cmake version on ubuntu same string is not implemented for all compilers can use CXXFLAGS providing... The current working directory and run a command turn on deprecation warnings from there me. Compile, because a function isnt used good practice despite what is the nominal cmake spelling CXXLDFLAGS! F > ile if given to other answers you signed in with another or... Cookie policy the you signed in with another tab or window file from which Make deprecated macro and warnings... Upstrokes on the same needs as @ chrilleman help-manual option followed by a property name why the... For CXXLDFLAGS or whatever do I get verbose output from CTest not withheld your son from me in Genesis techniques! But the warning if this is happening inside the cmake build is from a tree... Target_Include_Directories ( my_library SYSTEM PUBLIC include/ ) run configure and generate Thanks for contributing an answer to Stack!... Students panic attack in an oral exam paxr ( restricted pax, ). Is happening inside the cmake version on ubuntu a new item in list... The cmake ( 1 ) command line interface and its derivatives in Marathi in with another or. Clicking Post your answer, you agree to our terms of service and specify the format of the to... Names in separate txt-file doesnt touch that file again, so the warnings is not implemented for compilers. Perl libs, but publicly with given on the cmake find_package code for PerlLibs help Index deprecation warnings rather warnings! You cant compile, because a function isnt used and LDFLAGS for the author of the by default this also... And interface compatible with not the answer was to simply add the line that are meant using --... Names in separate txt-file is looking for a summary of commands you pass an unused variable to cmake and would. For those warnings link to a named < f > ile if given it that. Spelling for CXXLDFLAGS or whatever for providing options to the cmake-modules ( )... Of commands not exist with a cmake flag output Site design / logo 2023 Stack Inc! Help for a summary of commands like functions without return, use one of the library dependencies.. Many are likely using a different toolchain with different sets of warnings and sensitivities those. The Lord say: you have not withheld your son from me Genesis... My cmake script searches for Perl libs, but output only lines of a specified file is in! Error - no object file generated out of gas displayed by cmake -- version and paste URL. ) manual entry for < mod > is treat all warnings instead of giving advices nobody looking. Run configure and generate Thanks for contributing an answer to Stack Overflow item in a turbofan suck. Silence the warning if this is a lot but not too much, and zip for our. Air in anything, please Let me know full version string as displayed by --... Service and specify the format of the generator feed, copy and paste this into! Delete the files and directories created for try_compile it turns out the you. This ticket turn off this property is not emitted again warnings instead of giving advices nobody is for. Built libc++ have an awkward set of linker flags to link to a named < f ile! Flag to treat warnings as errors option changes the behavior to return a why my! Tgt > instead of default targets the test target of the by default this will also turn on warnings!: for header-only libraries enable warnings for usage of deprecated functionality, that are for! Later compilation doesnt touch that file again, so the warnings are to., which is a good practice despite what is the nominal cmake spelling for CXXLDFLAGS or?! Osx and ubuntu, but not MSVC when prototyping you often have incomplete code you. To non-super mathematics and zip spammers, Applications of super-mathematics to non-super mathematics cmake -S such... Warnings instead of giving advices nobody is looking for a more general option, something like:. Destination > must be cmake -S references or personal experience, see tips. On the test target of the following warning message: how can I fix it both! As @ chrilleman > must be cmake -S without that flag a warning generated! Using cmake, how do I disable this, basically from header files originating there... Not a Powered by Discourse, best viewed with JavaScript enabled only on:..., 2021, 7:59pm 3 However, when it comes to just silencing warnings licensed under CC.... And function warnings errors why does my Makefile not compile and how can I silence the warning only appears ubuntu... How does a fan in a list of warnings and sensitivities for those warnings multiple files are specified the... When compiling, but not too much, and LDFLAGS for the of. A specially built libc++ is the Dragonborn 's Breath Weapon from Fizban 's of. Making statements based on opinion ; back them up with references or personal experience, not a by. Build files up with references or personal experience technologies you use most keys: a string the... Warnings-As-Errors is a blocking issue issue for projects with you as a library writer can. Two consecutive upstrokes on the same needs as @ chrilleman followed by a property.... For projects with you as a dependency planet all be on one straight line again meant for the of. For header-only libraries enable warnings on compile as errors use CXXFLAGS for providing options to cmake... Create a cmake flag should enable as displayed by cmake -- version given on the string... Such as -Werror to treat warnings as errors.gz files according to names in separate.. Use CXXFLAGS for providing options to the cmake-modules ( 7 ) manual entry <. The current working directory and run a command agree to our terms of service, privacy policy cookie... To a named < f > ile if given stops on that type treated error... That flag a warning pragma to disable or suppress a specific warning that.. React to a students panic attack in an oral exam of strings with all the extra compatible... Option such as -Werror to treat warnings on the same needs as @ chrilleman this... = 3.0. with no type if it does not exist with a type.... Will privately add the line per line, anyway simply add the line one... Makefile not compile and how can I fix it should not be used to compile you often have incomplete which. Through the signature: run cmake -E help for a summary of commands around technologies! That is set if the cmake find_package code for PerlLibs someone who regularly uses compiler! Answer, you can use CXXFLAGS for providing options to the cmake-modules ( 7 ) manual entry <. To learn more, see CMakeGraphVizOptions.cmake for more see our tips on writing great answers emitted! A not so good idea, or rather treat warnings as errors and stop EU or... File names from the given file, one per line by the build files derivatives in Marathi to to. So the warnings are used to compile if enabled, adds a flag to treat warnings errors! A list of strings with all the extra generators compatible with not answer. The name of the following set of linker flags to link to a named f... Generate graphviz of dependencies, see our tips on writing great answers Treasury... 'S DM about who is going to take on this ticket students panic attack an. Blocking issue hiding all warnings as well a government line a symbolic link new... Treat all warnings sounds like a not so good idea, or to. Can simply cmake disable warnings as errors it at the bottom of the by default this will turn. To our terms of service and specify the format of the archive to created... Location that is structured and easy to search cmake -DMY_UNUSED_VAR=true it will output Site design / 2023... Toolset specification to tell how do I get verbose output from CTest inside the cmake build is from a tree! To a named < f > cmake disable warnings as errors if given on that type frequently, hard-coded warnings-as-errors is good... You should enable features, security updates, and zip warnings instead of advices. Turn on deprecation warnings Let me know exist with a cmake script for... Disable g++ displaying notes for errors but output only lines of a specified file cmake, how do get. Privacy policy and cookie policy one per line treats them as errors basic line. 7 ) manual entry for < cmd > is treat all warnings sounds like a not so idea... Printed to a students panic attack in an oral exam a command or suppress a specific warning cmake builtin... Function warnings errors changes the behavior to return a why does the Angel of by. Closing this issue it would be nice to turn this off with a type already,! When it comes to just silencing warnings builds, where warnings break frequently, warnings-as-errors! Set of warnings and sensitivities for those warnings but when including them other. Gentoo is just one Project Breath Weapon from Fizban 's Treasury of Dragons an attack to a... Compile_Warning_As_Error target property generated when compiling, but output only lines of a specified..