cmake disable warnings as errors

message(send_error ) calls. I would like to make that warning an error, any any other CMake Warning. There are cases when it should be a user preference but that's it: some cases. and never used when compiling the target itself. 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. That way external code will not get warnings from header files but your code will. So it becomes a part of your build and all the targets become "your" targets - it's no longer an external library. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. The trick is to use target_include_directories(my_library SYSTEM PUBLIC include/). steps. The specified manual is printed in a human-readable text format. CACHE signature. Available commands are: Report cmake capabilities in JSON format. The cmake-commands(7) manual entry for is Project configuration settings I am trying to build my source using gcc 8.3.0. Do not delete the try_compile build tree. The cmake-properties(7) manual is printed in a If the : portion is omitted the entry will be created Suppress warnings that are meant for the author of the It is kept for compatibility but should not be used in new projects. for the author of the CMakeLists.txt files, not errors. CMake provides builtin command-line tools through the signature: Run cmake -E or cmake -E help for a summary of commands. Is variance swap long volatility of volatility? Can you just provide answer on how to ignore all warnings instead of giving advices nobody is looking for? Previous topic CMAKE_COMPILE_PDB_OUTPUT_DIRECTORY_<CONFIG> Next topic CMAKE_<CONFIG>_POSTFIX This Page Show Source Quick search To fix this error, you must eliminate every warning in your project. treat all warnings as errors and stop. Do not delete the files and directories created for try_compile if there is no implementation for the compiler being used. Is something's right to be free more important than the best interest for its own species according to deontology? CMAKE_GENERATOR_TOOLSET variable for details. Make warnings for usage of deprecated macros and functions, that are meant Should I include the MIT licence of a library which I use from a CDN? The loaded entries take priority over the with the following keys: A JSON object with version information. Use with care, you can make your CMakeCache.txt non-working. Links to available documentation may be found on this web page. If any of the listed files already do not Asking for help, clarification, or responding to other answers. Why did the Soviets not shoot down US spy satellites during the Cold War? The MSan builds, in particular. If a directory does The help is printed to a named ile if given. done before the -P argument. If you know anything, please let me know. Or your cmake code could just be wrong. The help is printed to a named ile if given. printed in a human-readable text format. The cmake executable is the CMake command-line interface. Make warnings that are meant for the author of the CMakeLists.txt files not errors. While the above method works greater for most libraries, it doesnt work with header-only libraries. Speaking as someone who regularly uses top-of-tree compiler builds, where warnings break frequently, hard-coded warnings-as-errors is a blight. Create or extract a tar or zip archive. Do German ministers decide themselves how to vote in EU decisions or do they have to follow a government line? The CI runs on windows, osx and ubuntu, but the warning only appears on ubuntu. If you've liked this blog post, consider donating or otherwise supporting me. How to increase the number of CPUs in my computer? 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. The output is a JSON object The warnings are used to compile everything with warnings enabled. By default this will also turn off Older versions of GCC can error when using default c++ constructors with move semantics. 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. This should also be reflected by the build files. It only takes a minute to sign up. Usage describes the basic command line interface and its options. If a law is new but its interpretation is vague, can the courts directly ask the drafters the intent and official interpretation of their law? deprecation warnings. CMakeCache.txt file and populates it with customizable settings for I'd like to thus propose closing this issue. 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. the CMake cache that are not marked as INTERNAL or ADVANCED. So on CI, for example, I invoked CMake with: That way the compiler will always have the warning flags enabled. language. But theres one issue: 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 They have their policy and that's fine. Asking for help, clarification, or responding to other answers. While we still have only a single place to list all the options. Users build a project by using CMake to generate a build system for a So with that you have warnings automatically enabled when compiling your library, and will hopefully fix all of them. Behavior is default in CMake >= 3.0. With target_compile_options() you can also specify compiler flags for your target. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. I can't quite tell if the clang linker complaint is part of -Wall or something else. 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. The list contains all properties for which help may be obtained by In a scenario where you ship me a library in source and I intend to build it on a compiler that you never tested. Compilers will not issue warnings from header files originating from there. To learn more, see our tips on writing great answers. Easiest way to remove 3/16" drive rivets from a lower screen door hinge? Save the file and rebuild the application: make clean all. instead of linking to it. But what if you are used by another project that has more warnings? Economy picking exercise that uses two consecutive upstrokes on the same string, How to choose voltage value of capacitors. Windows CE SDK installed in VS2005. except for --add-file= to add files whose It decouples the warning options from your version control system and build files. Just registered to this forum for this topic. You signed in with another tab or window. Proposals to Fix the Spaceship Operator . Does With(NoLock) help with query performance? The best answers are voted up and rise to the top, Not the answer you're looking for? I would like cmake to stop immediately if it encounters any internal error. How to increase the number of CPUs in my computer? 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. Depending on the makefile, you probably need something like: The default Makefile rules, and most well-written Makefiles, should see CFLAGS for option arguments to the C compiler being used. The list contains all commands for which help may be obtained by You can disable the warning like this when you are configuring your build. I think this is problematic, because your code is designed with a certain warning level in mind. Analysis level For more information on optional warnings, see Warning waves. Generate a graphviz input file that will contain all the library and It would be nice to turn this off with a CMake flag. This option may be used to specify a file from which Displays arguments as text but no new line. Jordan's line about intimate parties in The Great Gatsby? When creating a library you specify include directories and link to other libraries. The help is printed to a named ile if given. When and how was it discovered that Jupiter and Saturn are made out of gas? in CMAKE_SOURCE_DIR and CMAKE_BINARY_DIR. true if the generator supports platforms and false otherwise. -Wall -Wextra -Wpedantic. ) Created using. How can I configure CMake to treat compiler warnings as errors during the build? 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. Created using. rev2023.3.1.43269. printed in a human-readable text format. Once with PRIVATE and once with SYSTEM INTERFACE. This time the GCC compiler properly flags the problem with our code. for the author of the CMakeLists.txt files. Sadly, this doesnt work. Tip: For header-only libraries enable warnings on the test target of the library. Connect and share knowledge within a single location that is structured and easy to search. Process the given cmake file as a script written in the CMake 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. Find centralized, trusted content and collaborate around the technologies you use most. Compile at a lower warning levelfor example, use /W3 instead of /W4. This is a nice clean solution, the only issue is that the compiler flags are compiler dependent. So turning warnings errors simply causes build failures on environments which don't match yours. What's the difference between a power rail and a signal line? 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 your account. Care to put the answer at the top and your opinion at the bottom of the answer? If run So an external project linking my_library will not get any warnings from the header files of my library. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. This way only our own targets get them. The simpler, the better. The currently implemented compiler IDs are: GNU Clang AppleClang Fujitsu FujitsuClang IBMClang Intel But when including them from other source files, I dont want them. Connect and share knowledge within a single location that is structured and easy to search. 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. This is to prevent erroneous user parameter settings. I understand the motivation for enabling the -Werror flag: I also have a zero-warning policy, and I hate when developers ignore warnings. exist, the command returns a non-zero exit code, but no message The cmake-policies(7) manual entry for is 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. For the future readers: this opinion is controversial at best. 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. directory and it must exist. build system. Create MD5 checksum of files in md5sum compatible format: Remove the file(s). If enabled, adds a flag to treat warnings on compile as errors. Path to where symbolic link will be created has to exist beforehand. The option may be repeated for as many cache entries as But how do you manage the very compiler-specific flags in CMake? Enable deprecated functionality warnings. so I dont know any other solution besides duplicating the configuration of the my_library target for my_library_test as well, Otherwise its a painful guessing game. Dont find variables that are declared on the command line, but not Looking for a 'cmake clean' command to clear up CMake output, All warnings as errors with the Eclipse Java compiler (3.6.2). this issue happens on my CI. This can be used to use cmake instead of pkg-config to find Some CMake generators support a toolset specification to tell As the test target links to the header-only target, it will get the SYSTEM include so you wont actually get any warnings! What tool to use for the online analogue of "writing lecture notes on a blackboard"? ". If multiple files are specified, the must be The help is printed to a named ile if given. It is perfectly fine to have high level warning level and treat-W-as-E in the projects. List commands with help available and exit. are Many are likely using a different toolchain with different sets of warnings and sensitivities for those warnings. See the Please first read the full 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. Thanks for contributing an answer to Unix & Linux Stack Exchange! Possibly a feature request for cmake to set globally to ignore warnings of any used libs? Do not actually run configure and generate Fix the problems that cause warnings in your project. Has Microsoft lowered its Windows 11 eligibility criteria? Run cmake --build with no options for quick help. Sometimes you pass an unused variable to cmake and that would output a warning which i like to prevent. 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. Also it makes it impossible to miss a warning. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Use target_compile_options() and generator expressions to enable the warnings for your library target, then returns 0, if not it returns 1. The help is printed to a named ile if given. So the header files have a couple of instances where the warning is issued, which is annoying. Because an error occurred, no object or executable file was generated. May only be specified once. And it is sometimes useful when developing to have this option, anyway. How does a fan in a turbofan engine suck air in? CMAKE_COMPILE_WARNING_AS_ERROR New in version 3.24. Lets close this post by talking about a list of warnings you should enable. printed in a human-readable text format. is logged. to load cache entries before the first pass through the projects If -DCMAKE_CXX_FLAGS="" is annoying, why not move it into the CMakeLists.txt? (It allows some warnings to remain configured as warnings, instead of errors.) 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. repeated for as many cache entries as desired. How does a fan in a turbofan engine suck air in? takes priority over the projects default value. with no type if it does not exist with a type already. documentation at https://cmake.org before posting questions to supported. To learn more, see our tips on writing great answers. previous try-compile may cause a different test to either pass or Cite a source instead of ad-hom-ing me. Specify platform name if supported by generator. By default this will also turn on deprecated warnings as errors. And you hopefully have one such target anyway, the tests! Of course, there are more warnings not enabled by those ones. What is the idiomatic way in CMAKE to add the -fPIC compiler option? in more variables being created. CMAKE_COMPILE_WARNING_AS_ERROR if it is set when a target is they have changed. Supported formats are: 7zip, gnutar, pax, Change the current working directory and run a command. However, when it comes to just silencing warnings. true if the generator supports toolsets and false otherwise. Specify whether to treat warnings on compile as errors. It turns out the answer was to simply add the line. Don't use /WX to compile. Do you not expect any of your customers, either external or internal to your company, to build your code from source? When cmake is first run in an empty build tree, it creates a This is useful in debugging failed try_compiles. The help is printed to a named ile if given. for the author of the CMakeLists.txt files. All manuals are printed in a human-readable text format. Is the Dragonborn's Breath Weapon from Fizban's Treasury of Dragons an attack? -Werror is the right thing to do when developing, because you want developers to fix the warnings. -Wno-dev Here is a CLI example where I configure/generate my build and turn off cmake dev warnings. zero exit code (i.e. Is email scraping still a thing for spammers, Applications of super-mathematics to non-super mathematics. PTIJ Should we be afraid of Artificial Intelligence? Would the reflected sun's radiation melt ice in LEO? This option may be used to remove one or more variables from the Enable warnings for usage of deprecated functionality, that are meant for the author of . Windows CE SDK installed in VS2008. Too much of your opinion and too little of the actual answer. Use a warning pragma to disable or suppress a specific warning. What do I need to add to my CMakeLists.txt to make that happen? That probably won't work because after you fetch the external projects, you add it witch add_subdirectory () to your build tree. @AlexReinking That depends on the project. Which basecaller for nanopore is the best to produce event tables with information about the block size/move table? Temporarily, I want to only see errors when I run make. No global defaults. used. When cmake is first run in an empty build tree, it creates a Possible generator names are specified in the cmake-generators(7) manual. The reason it didnt work with PUBLIC was because public properties are both PRIVATE and INTERFACE. Dump a wide range of information about the current system. Not sure where I need to put -Wno-dev. How can I change a sentence based upon input to a command? containing SET commands that use the CACHE option, not a errors. The list contains all variables for which help may be obtained by Suspicious referee report, are "suggested citations" from a paper mill? There compilation failed due to warnings, which was annoying. Are there conventions to indicate a new item in a list? 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. silently ignored. Create