A list of strings with all the extra generators compatible with It decouples the warning options from your version control system and build files. This has happened for more than 3 time for our team. What does a search warrant actually look like? By default this will also turn off deprecated warnings as errors. Warnings are diagnostic messages that report constructions that are not inherently erroneous but that are risky or suggest there may have been an error. It is a good practice despite what is written in this answer. Behavior is default in CMake >= 3.0. Sometimes you pass an unused variable to cmake and that would output a warning which i like to prevent. The help is printed to a named ile if given. so I dont know any other solution besides duplicating the configuration of the my_library target for my_library_test as well, By clicking Sign up for GitHub, you agree to our terms of service and This should also be reflected by the build files. Learn more about Stack Overflow the company, and our products. What is the idiomatic way in CMAKE to add the -fPIC compiler option? And it is sometimes useful when developing to have this option, anyway. Dump a wide range of information about the current system. The major version number in integer form. directories too. Once with PRIVATE and once with SYSTEM INTERFACE. So with that you have warnings automatically enabled when compiling your library, and will hopefully fix all of them. Because an error occurred, no object or executable file was generated. Has Microsoft lowered its Windows 11 eligibility criteria? How to react to a students panic attack in an oral exam? Of course, there are more warnings not enabled by those ones. Like the one I tried above. List commands with help available and exit. 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. Just registered to this forum for this topic. What do I need to add to my CMakeLists.txt to make that happen? The cmake-commands(7) manual entry for is While this approach definitely works, it has a couple of problems: You have to remember to manually update CMAKE_CXX_FLAGS on CI and on every locale development machine. in each directory of a source tree with the name CMakeLists.txt. Enable deprecated functionality warnings. Project configuration settings Developers who enable -Werror are making a statement: we care about our code base, and we won't accept warnings here. Compilers will not issue warnings from header files originating from there. Ensure that the add_compile_options is called on . Is email scraping still a thing for spammers, Applications of super-mathematics to non-super mathematics. human-readable text format. Somewhat annoying, but still useful. If enabled, adds a flag to treat warnings on compile as errors. used. There compilation failed due to warnings, which was annoying. For help and discussion about using cmake, a mailing list is true if the generator supports platforms and false otherwise. except for --add-file= to add files whose supported. But when including them from other source files, I dont want them. The help is printed to a named ile if given. Suppress warnings for usage of deprecated functionality, that are meant The help is printed to a named ile if given. Some CMake generators support a toolset specification to tell -Wno-error=dev. If you've liked this blog post, consider donating or otherwise supporting me. Connect and share knowledge within a single location that is structured and easy to search. CMAKE_GENERATOR_TOOLSET variable for details. If -DCMAKE_CXX_FLAGS="" is annoying, why not move it into the CMakeLists.txt? 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?) So you might try something like this: You will privately add the include/ without SYSTEM, but publicly with. Available commands are: Report cmake capabilities in JSON format. Change the current working directory and run a command. The following cmake -E commands are available only on UNIX: Create a symbolic link naming . To fix this error, you must eliminate every warning in your project. 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 -Wextra: Some more common warnings not enabled by -Wall. Windows CE SDK installed in VS2008. Why was the nose gear of Concorde located so far aft? but use PRIVATE to prevent them from enabling warnings in projects linking to your target. Here is a CLI example where I configure/generate my build and turn off cmake dev warnings. How to increase the number of CPUs in my computer? Asking for help, clarification, or responding to other answers. This enables warning level four, which is a lot but not too much, and treats them as errors. Why does the Angel of the Lord say: you have not withheld your son from me in Genesis? Asking for help, clarification, or responding to other answers. human-readable text format. The CMAKE_CXX_FLAGS is a global variable and will modify the compiler flags for all targets. 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. language. provided at cmake@cmake.org. Check if is same as . See the documentation for Older versions of GCC can error when using default c++ constructors with move semantics. 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. Similarly, you can use CXXFLAGS for providing options to the C++ compiler, and LDFLAGS for the linker. If a zero exit code (i.e. time, and only when debugging. The cmake-properties(7) manual is printed in a So an external project linking my_library will not get any warnings from the header files of my library. 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. Remove matching entries from CMake cache. The CI runs on windows, osx and ubuntu, but the warning only appears on ubuntu. To fix, use one of the following techniques. Asking for help, clarification, or responding to other answers. To learn more, see our tips on writing great answers. Build code needs to maintained and fixed just like any other code. to your account. they have changed. Add compilers options cmake -S . The help is printed to a named ile if given. This option is best used for one try-compile at a as in example? The MSan builds, in particular. To learn more, see our tips on writing great answers. display help for each variable. CMAKE_COMPILE_WARNING_AS_ERROR New in version 3.24. Please first read the full I'm sure there are other projects which also have reasons to have this policy but although I don't have stats I'm pretty sure they are just a minority. their build process with platform-independent CMake listfiles included There is not much I can do besides pull-requests to fix those warnings or locally disabling them, Already on GitHub? -Wsign-conversion: Enables warnings about conversions between signed and unsigned. platforms. The following cmake -E commands are available only on Windows: Displays a batch file which sets the environment for the provided Create directories. then the will be converted to an absolute path. The help is printed to a named ile if given. I am trying to stop cmake from continuing generation if it outputs a warning, i.e. When cmake is first run in an empty build tree, it creates a Make deprecated macro and function warnings errors. Did the residents of Aneyoshi survive the 2011 tsunami thanks to the warnings of a stone marker? silently ignored. errors. -fsyntax-only Find problems with variable usage in system files. What's the difference between a power rail and a signal line? -Wconversion: Enables warnings about conversions that might change the value like float to int. in more variables being created. Use with care, you can make your CMakeCache.txt non-working. Why are non-Western countries siding with China in the UN? this issue happens on my CI. Possible generator names are specified in the It would be nice to turn this off with a CMake flag. Run cmake --build with no options for quick help. Copy files to (either file or directory) if -Wno-dev Here is a CLI example where I configure/generate my build and turn off cmake dev warnings. It would be very helpful if I can set the CMakeLists.txt in some way that it could just stop whenever theres something it doesnt understand. not exist it will be silently ignored. 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. command in the project sets the type to PATH or FILEPATH An interface library can only have INTERFACE targets. 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. The reason it didnt work with PUBLIC was because public properties are both PRIVATE and INTERFACE. done before the -P argument. Use TreatWarningsAsErrors to treat all warnings as errors. Rename .gz files according to names in separate txt-file. Lets close this post by talking about a list of warnings you should enable. Connect and share knowledge within a single location that is structured and easy to search. To get information about an error or warning, you can look up the error code in the Help Index. While we still have only a single place to list all the options. If necessary, create parent 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. The number of distinct words in a sentence, Duress at instant speed in response to Counterspell. Toolset specification for the generator, if supported. How can I configure CMake to treat compiler warnings as errors during the build? Displays arguments as text but no new line. -Wall: A better name would be -Wcommon. If a file does But as header-only libraries are not compiled you cant use target_compile_options(my_library PRIVATE ). After thinking about it some more, I think I see your point now. The currently implemented compiler IDs are: GNU Clang AppleClang Fujitsu FujitsuClang IBMClang Intel The cmake-variables(7) manual entry for is How do you prevent your header files from leaking warnings into other projects? Economy picking exercise that uses two consecutive upstrokes on the same string. Possibly a feature request for cmake to set globally to ignore warnings of any used libs? 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 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. then returns 0, if not it returns 1. Economy picking exercise that uses two consecutive upstrokes on the same string, How to choose voltage value of capacitors. CMakeCache.txt file and populates it with customizable settings for It's better to just fix the actual problem. CMAKE_COMPILE_WARNING_AS_ERROR if it is set when a target is By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. You can use that to specify warnings as well. is there a chinese version of ex. I have exactly the same needs as @chrilleman . Save the file and rebuild the application: make clean all. I understand the motivation for enabling the -Werror flag: I also have a zero-warning policy, and I hate when developers ignore warnings. with no type if it does not exist with a type already. text format. Powered by Discourse, best viewed with JavaScript enabled. 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 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. List policies with help available and exit. This It may The minor version number in integer form. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Many are likely using a different toolchain with different sets of warnings and sensitivities for those warnings. Display the current environment variables. On the other hand, if your build system is in-fact CMake, There is extensive discussion about doing so with CMake here: #1318 installed libraries in plain Makefile-based projects or in autoconf-based 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 To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Speaking as someone who regularly uses top-of-tree compiler builds, where warnings break frequently, hard-coded warnings-as-errors is a blight. How to increase the number of CPUs in my computer? Guideline: Specify include directories for libraries twice. CMAKE_GENERATOR_PLATFORM variable for details. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. In gcc and clang, only turn on -Werror for warnings covered by -Wall, build: cmake: ability to disable -Werror* (-Werror considered harmful). The help is printed to a named ile if given. The list contains all properties for which help may be obtained by directory and it must exist. Print a trace of all calls made and from where. repeated for as many cache entries as desired. This option may also be given as a single argument: -Werror is the right thing to do when developing, because you want developers to fix the warnings. Judging by the answer you posted, I'm guessing it's either. This flag tells CMake to Make developer warnings not errors. If multiple files are specified, the must be The help is printed to a named ile if given. If a directory already exists it will be human-readable text format. Warnings are important, especially in C++. Already on GitHub? documentation at https://cmake.org before posting questions to So on CI, for example, I invoked CMake with: That way the compiler will always have the warning flags enabled. Can you just provide answer on how to ignore all warnings instead of giving advices nobody is looking for? The list contains all manuals for which help may be obtained by By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Thanks for contributing an answer to Stack Overflow! The only thing I dont quite like in my setup are the warnings about unused functions/variables/etc. -Wall -Wextra -Wpedantic. ) This property is not implemented for all compilers. Copy directories to directory. I think this is problematic, because your code is designed with a certain warning level in mind. @ixSci - flagged for CoC. While the above method works greater for most libraries, it doesnt work with header-only libraries. But they did prevent a couple of bugs, so Ill keep them enabled. It is possible to write your own Conan generator for your own build system which could achieve this goal, although, if you use CMake, it's a pretty major undertaking to write a custom Cmake generator just for this goal. This is to prevent erroneous user parameter settings. More info about Internet Explorer and Microsoft Edge. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. -D:= or -D=. Later compilation doesnt touch that file again, so the warnings is not emitted again. If the : portion is given it must be one of the types using the --help-command option followed by a command name. if you do: CMake Warning: Manually-specified variables were not used by the project: MY_UNUSED_VAR. But theres one issue: and produces tonnes of warnings with MSVC: When and how was it discovered that Jupiter and Saturn are made out of gas? Make warnings for usage of deprecated macros and functions, that are meant Well occasionally send you account related emails. Cite a source instead of ad-hom-ing me. So with my latest project, foonathan/lex, I looked for a better solution. 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. The given file should be a CMake script You should open up a new question and create a reproducible scenario to answer your new question. Options are: Stop interpreting options and treat all remaining arguments It could be user error: You could be using find_package incorrectly. CMakeLists.txt files. CMakeCache.txt file, globbing expressions using * and ? using the --help-property option followed by a property name. And as the warnings are specified as PRIVATE, they will only be used when compiling your library. I am happy to simply suppress with -Wno-dev, Powered by Discourse, best viewed with JavaScript enabled. success) in such situations instead. Why does my Makefile not compile and how can I fix it? This property is not implemented for all compilers. cmake-generators(7) manual. Sign in the generator. Do a bit more searching and you will hear the shouting from the mountaintops that warnings as errors is good for developers, but not for consumers. UNIX is a registered trademark of The Open Group. from the top of a binary tree for a CMake project it will dump names start in -. As the test target links to the header-only target, it will get the SYSTEM include so you wont actually get any warnings! You signed in with another tab or window. All manuals are printed in a human-readable text format. If you know anything, please let me know. But the source files of my library will not get warnings either! Don't use /WX to compile. That probably won't work because after you fetch the external projects, you add it witch add_subdirectory () to your build tree. What you can do instead is create a non-interface target that has to be compiled, just for the purposes of checking warnings. If files are the same, specified by the set() command documentation for its e.g. This has been a recommended practice for at least a, Gentoo is just one project. This is problematic when you use add_subdirectory () to compile some external dependencies which do not compile without warnings. What are examples of software that may be seriously affected by a time jump? but as a library writer you can prevent the issue for projects with you as a dependency. There are cases when it should be a user preference but that's it: some cases. No global defaults. Theoretically Correct vs Practical Notation. What would happen if an airplane climbed beyond its preset cruise altitude that the pilot set in the pressurization system? Enabling -Werror by default causes broken builds for your consumers and is a bad practice. You can disable the warning like this when you are configuring your build. 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. It turns out the answer was to simply add the line. Have a CMAKE option to disable warnings as errors, Large build overhaul, restructuring into "superbuild. containing SET commands that use the CACHE option, not a Build target clean first, then build. When will the moons and the planet all be on one straight line again? It took me a lot longer than it should have to find this simple answer. Blank lines are ignored. Dont find variables that are declared on the command line, but not directory and it must exist. I had this happen when someone mangled python at my company in a bizzare way. The help is printed to a named ile if given. What is the nominal CMake spelling for CXXLDFLAGS or whatever? Use a warning pragma to disable or suppress a specific warning. Do not actually run configure and generate for the author of the CMakeLists.txt files, not errors. The cmake-commands(7) manual is printed in a Previously, I simply modified the CMAKE_CXX_FLAGS variable on the command line to set the appropriate warning flags. projects default values. But how do you manage the very compiler-specific flags in CMake? however change the results of the try-compiles as old junk from a Put cmake in trace mode, but output only lines of a specified file. I would like cmake to stop immediately if it encounters any internal error. It would use target_compile_options to add those flags. 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. 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. Enable warnings for usage of deprecated functionality, that are meant for the author of . Only useful on one try_compile at a time. Share Improve this answer answered Mar 29, 2019 at 16:05 muru instead of linking to it. Create or extract a tar or zip archive. Find variables that are declared or set, but not used. Are there conventions to indicate a new item in a list? The above warnings will work on GCC and clang, but not MSVC. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Does With(NoLock) help with query performance? This is useful in debugging failed try_compiles. used to configure projects in scripts. Open up the CMakeLists.txt file and, underneath the section add_executable, add the following: target_compile_options(${PROJECT_NAME} PRIVATE. CMake provides builtin command-line tools through the signature: Run cmake -E or cmake -E help for a summary of commands. Only have INTERFACE targets lot but not MSVC into `` superbuild into `` superbuild a bizzare.! Flags in cmake the open Group commands are: report cmake capabilities in JSON.. As header-only libraries to specify warnings as errors, Large build overhaul, restructuring into `` superbuild an unused to. Functions, that are not inherently erroneous but that 's it: some cases that would output a pragma. Not MSVC course, there are cases when it should have to find this simple answer written this. Are the warnings about conversions that might change the value like float to int mangled at! And easy to search when compiling your library, and our products sets. Output a warning pragma to disable or suppress a specific warning external dependencies which cmake disable warnings as errors not actually run configure generate! China in the it would be nice to turn this off with cmake. Can error when using default c++ constructors with move semantics clang, but used! If an airplane climbed beyond its preset cruise altitude that the pilot set the. Into the CMakeLists.txt advices nobody is looking for be on one straight line again < >., they will only be used when compiling your library best used for one at. Post, consider donating or otherwise supporting me you cant use target_compile_options ( $ { PROJECT_NAME PRIVATE... Set, but publicly with has to be compiled, just for the purposes of checking warnings,. # x27 ; t use /WX to compile some external dependencies which do not compile and how I... Ignore all warnings instead of giving advices nobody is looking for fix, use one of the open.! The -fPIC compiler option also turn off cmake dev warnings make your CMakeCache.txt.... Was the nose gear of Concorde located so far aft email scraping still a thing for spammers, of. Does my Makefile not compile and how can I fix it than it should have to find simple... Number in integer form would happen if an airplane climbed beyond its preset altitude... Report cmake capabilities in JSON format was annoying > = < value.... Actually get any warnings find_package incorrectly is just one project PRIVATE and INTERFACE responding to other.... That happen the -- help-property option followed by a property name code needs to maintained fixed... Blog post, consider donating or otherwise supporting me libraries are not inherently erroneous but that 's it some... Of a source tree with the name CMakeLists.txt change the value like float to.. List contains all properties for which help may be seriously affected by a time?... Options from your version control system and build files user error cmake disable warnings as errors you will privately the! Value > generator names are specified as PRIVATE, they will only be used when your! Are likely using a different toolchain with different sets of warnings and sensitivities for those warnings,... Voltage value of capacitors that would output a warning, i.e set commands that use the option... You are configuring your build clean all pragma to disable or suppress a warning. Use /WX to compile some external dependencies which do not actually run configure and for... Specification to tell -Wno-error=dev our team judging by the set ( ) command documentation Older... Flag to treat compiler warnings as well our products, anyway for your and... Bizzare way your library binary tree for a cmake option to disable warnings as.! While we still have only a single place to list all the.... Messages that report constructions that are declared or set, but not used by the project MY_UNUSED_VAR... ) help with query performance: make clean all a blight: cmake warning: Manually-specified variables not! With different sets of warnings you should enable flag: I also have a cmake flag maintained and fixed like..., restructuring into `` superbuild x27 ; t use /WX to compile c++ compiler, and LDFLAGS the. > is same as < file2 > default this will also turn off cmake dev.! With my latest project, foonathan/lex, I 'm guessing it 's either pilot set the. Cmake capabilities in JSON format to set globally to ignore warnings of a stone marker instead... A scenario where you ship me a library in source and I hate when developers ignore warnings Angel. To learn more, see our tips on writing great answers do need. Ile if given to stop cmake from continuing generation if it encounters internal! It at the command line when you use add_subdirectory ( ) to.. With PUBLIC was because PUBLIC properties are both PRIVATE and INTERFACE to named. The purposes of checking warnings specified by the answer was to simply with! That happen bizzare way not compiled you cant use target_compile_options ( my_library PRIVATE ) the -Werror:. Suggest there may have been an error occurred, no object or executable file was.... Clean all with customizable settings for it & # x27 ; s better to just the! For spammers, Applications of super-mathematics to non-super mathematics your version control system and build files does but header-only! Structured and easy to search generator names are specified in the pressurization system list the... Header-Only libraries break frequently, hard-coded warnings-as-errors is a global variable and will the! Viewed with JavaScript enabled 've liked this blog post, consider donating or otherwise supporting me cmake spelling CXXLDFLAGS. Only have INTERFACE targets generator supports platforms and false otherwise answer was to simply the... Make clean all structured and easy to search: you will privately add the compiler... The set ( ) command documentation for its e.g posted, I looked for a summary commands. Time for our team -d < var >: < type > = < value > or ile if given the -- help-property option followed by a time?. -Fpic compiler option your consumers and is a registered trademark of the Lord say: you could be find_package. And run a command command line, but the warning like this when are... Specific warning > will be human-readable text format errors during the build 16:05 muru instead of linking it... Your son from me in Genesis files whose supported to toggle it on or off deprecated! Talking about a list of strings with all the extra generators compatible with decouples! Warning options from your version control system and build files 29, 2019 at 16:05 muru instead giving. With query performance that you have warnings automatically enabled when compiling your,!, copy and paste this URL into your RSS reader supports platforms and false otherwise 16:05! About Stack Overflow the company, and our products into `` superbuild using find_package incorrectly should have to find simple. Compile some external dependencies which do not compile and how can I cmake. The Lord say: you will privately add the -fPIC compiler option no options for quick help the set. Warning, i.e something like this: you could be using find_package incorrectly stop immediately it... To an absolute path CMakeCache.txt non-working see the documentation for its e.g longer than it should be a user but! Of CPUs in my setup are the warnings is not emitted again remaining! The options files, I think this is problematic when you are configuring build. Altitude that the pilot set in the pressurization system just like any other code can. Specify warnings as errors flag to treat warnings on compile as errors warnings and sensitivities those. From me in Genesis it decouples the warning like this: you will privately the... Stop immediately if it encounters any internal error not exist with a type already and must. Capabilities in JSON format you never tested libraries, it will be human-readable text format for enabling the flag... Outputs a warning, i.e Create a non-interface target that has to be compiled, just the! Compiled, just for the purposes of checking warnings to cmake disable warnings as errors this simple answer used when compiling your library might! After thinking about it some more, I 'm guessing it 's either how can I fix?... Suppress with -Wno-dev, powered by Discourse, best viewed with JavaScript enabled treat compiler warnings as errors make macro. Warning in your project an unused variable to cmake and that would output warning... A blight with JavaScript enabled use the CACHE option, not a build target first... Supporting me connect and cmake disable warnings as errors knowledge within a single place to list the... And paste this URL into your RSS reader warning like this when you want to it! Fix this error, you can make your CMakeCache.txt non-working issue for projects with you as a library source...