cmake disable warnings as errors

@david-german-tri Let's DM about who is going to take on this ticket. How does a fan in a turbofan engine suck air in? The cmake-modules(7) manual entry for is printed How to increase the number of CPUs in my computer? What is CMake equivalent of 'configure --prefix=DIR && make all install '? By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Print extra information during the cmake run like stack traces with CMakeCache.txt file, globbing expressions using * and ? Is variance swap long volatility of volatility? the deprecated error/warning only stops on that type. The help is printed to a named ile if given. If any of the listed files already do not Project configuration settings but as a library writer you can prevent the issue for projects with you as a dependency. How to suppress all warnings being treated as errors for format-truncation, The open-source game engine youve been waiting for: Godot (Ep. And it is sometimes useful when developing to have this option, anyway. using the --help-module option followed by a module name. -Wno-dev Here is a CLI example where I configure/generate my build and turn off cmake dev warnings. Use target_compile_options() and generator expressions to enable the warnings for your library target, By clicking Sign up for GitHub, you agree to our terms of service and They have an awkward set of linker flags to link to a specially built libc++. The list contains all commands for which help may be obtained by Compilers will not issue warnings from header files originating from there. Available commands are: Report cmake capabilities in JSON format. Like --trace, but with variables expanded. Not the answer you're looking for? Thank you! Add compilers options Change the current working directory and run a command. When creating a library you specify include directories and link to other libraries. with no type if it does not exist with a type already. Theoretically Correct vs Practical Notation. Touch a file if it exists but do not create it. Remove matching entries from CMake cache. 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? 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. human-readable text format. This is to prevent erroneous user parameter settings. Silencing warnings permanently is just asking for problems down the road. -Wextra: Some more common warnings not enabled by -Wall. Make warnings for usage of deprecated macros and functions, that are meant Why did the Soviets not shoot down US spy satellites during the Cold War? The warnings are used to compile everything with warnings enabled. How to suppress PAM audit logs for RHEL8? the native build system how to choose a compiler. So it becomes a part of your build and all the targets become "your" targets - it's no longer an external library. I'd like to thus propose closing this issue. How to increase the number of CPUs in my computer? privacy statement. in more variables being created. using the --help-property option followed by a property name. The help is printed to a named ile if given. CMAKE_GENERATOR_PLATFORM variable for details. 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. Like the one I tried above. are Some CMake generators support a toolset specification to tell Suppress warnings that are meant for the author of the Sign up for a free GitHub account to open an issue and contact its maintainers and the community. printed in a human-readable text format. 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. On the contrast, targets linking to it will get the include directories and other libraries as they are PUBLIC. What tool to use for the online analogue of "writing lecture notes on a blackboard"? If a file does Sometimes you pass an unused variable to cmake and that would output a warning which i like to prevent. It is perfectly fine to have high level warning level and treat-W-as-E in the projects. See the Check if is same as . CMake is a cross-platform build system generator. Share Improve this answer answered Mar 29, 2019 at 16:05 muru 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. zero exit code (i.e. It would use target_compile_options to add those flags. Looking for a 'cmake clean' command to clear up CMake output, All warnings as errors with the Eclipse Java compiler (3.6.2). Making statements based on opinion; back them up with references or personal experience. Show program name/version banner and exit. Why was the nose gear of Concorde located so far aft? I have found the dev and deprecated warning option to do this but ill like this to happen on any warning. The above warnings will work on GCC and clang, but not MSVC. The help is printed to a named ile if given. This time the GCC compiler properly flags the problem with our code. containing SET commands that use the CACHE option, not a The currently implemented compiler IDs are: GNU Clang AppleClang Fujitsu FujitsuClang IBMClang Intel instead of linking to it. for the author of the CMakeLists.txt files, errors. to your account. List policies with help available and exit. The cmake-policies(7) manual entry for is I am happy to simply suppress with -Wno-dev, Powered by Discourse, best viewed with JavaScript enabled. Applications of super-mathematics to non-super mathematics. This option is best used for one try-compile at a No global defaults. Enable warnings for usage of deprecated functionality, that are meant for the author of . using the --help-command option followed by a command name. Older versions of GCC can error when using default c++ constructors with move semantics. It would be nice to turn this off with a CMake flag. The help is printed to a named ile if given. If you know anything, please let me know. The help is printed to a named ile if given. The CI runs on windows, osx and ubuntu, but the warning only appears on ubuntu. Make warnings for usage of deprecated macros and functions, that are meant CMakeGraphVizOptions.cmake for more details. 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. My cmake script searches for Perl libs, but I get the following warning message: How can I disable this? It decouples the warning options from your version control system and build files. It may Do not delete the files and directories created for try_compile Does With(NoLock) help with query performance? Don't use /WX to compile. An error be is a syntax error that prevents compilation. true if the generator supports platforms and false otherwise. Specify platform name if supported by generator. More info about Internet Explorer and Microsoft Edge. The help is printed to a named ile if given. -B build -Wno-dev anon45792294 January 1, 2021, 7:59pm 3 However, when it comes to just silencing warnings. Specify whether to treat warnings on compile as errors. Blank lines are ignored. Use with care, you can make your CMakeCache.txt non-working. rev2023.3.1.43269. It is silently ignored I am trying to stop cmake from continuing generation if it outputs a warning, i.e. For the future readers: this opinion is controversial at best. You signed in with another tab or window. rev2023.3.1.43269. And as the warnings are specified as PRIVATE, they will only be used when compiling your library. It's better to just fix the actual problem. I'm also not sure what link you want from me, you just need to work in the industry to know that. This option may be used to specify a setting that Hiding all warnings sounds like a not so good idea, or rather treat warnings as errors. Browse other questions tagged. How to disable unused code warnings in Rust? For MSVC I use /WX /W4. List cache variables will run CMake and list all the variables from Display the current environment variables. This can be used to use cmake instead of pkg-config to find I understand the motivation for enabling the -Werror flag: I also have a zero-warning policy, and I hate when developers ignore warnings. You should open up a new question and create a reproducible scenario to answer your new question. silently ignored. I am working up a PR to use that phrasing for both gcc and clang. the deprecated error/warning only stops on that type. Enable warnings that are meant for the author of the CMakeLists.txt display also advanced variables. Print a warning when an uninitialized variable is used. That way external code will not get warnings from header files but your code will. A Wiki is provided containing answers to frequently asked questions. Path to where symbolic link will be created has to exist beforehand. projects default values. Of course, there are more warnings not enabled by those ones. 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 cmake-variables(7) manual is printed in a -pedantic-errors: This enables strict standard conformance, basically. cmake listfiles. Learn more about Stack Overflow the company, and our products. if you do: CMake Warning: Manually-specified variables were not used by the project: MY_UNUSED_VAR. following options: Project binary directory to be built. e.g. Sometimes you pass an unused variable to cmake and that would output a warning which i like to prevent. 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. 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. 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. 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. Find variables that are declared or set, but not used. Proposals to Fix the Spaceship Operator . success) in such situations instead. Create or extract a tar or zip archive. You either have to remove -Werror or manually disable warnings on the external target somehow. may be specified on the command line with the -D option. @Frank: But it is the purpose of the question - to affect on the, The open-source game engine youve been waiting for: Godot (Ep. CMake provides a command-line signature to build an already-generated The only thing I dont quite like in my setup are the warnings about unused functions/variables/etc. The minor version number in integer form. Many are likely using a different toolchain with different sets of warnings and sensitivities for those warnings. There are cases when it should be a user preference but that's it: some cases. So an external project linking my_library will not get any warnings from the header files of my library. Windows CE SDK installed in VS2005. desired. So, it may be a configuration issue. The option may be to load cache entries before the first pass through the projects This option may be used to specify a file from which Has 90% of ice around Antarctica disappeared in less than a decade? So on CI, for example, I invoked CMake with: That way the compiler will always have the warning flags enabled. but use PRIVATE to prevent them from enabling warnings in projects linking to your target. Created using. A warning is a potential runtime error and should never be ignored. The cmake-commands(7) manual is printed in a The simpler, the better. Connect and share knowledge within a single location that is structured and easy to search. On the other hand, if your build system is in-fact CMake, There is extensive discussion about doing so with CMake here: #1318 specified by the set() command documentation for its Guideline: Specify include directories for libraries twice. It enables common warnings like use of uninitialized variables. By default this will also turn on deprecated warnings as errors. You can disable the warning like this when you are configuring your build. Enable deprecated functionality warnings. All manuals are printed in a human-readable text format. What does a search warrant actually look like? Why does my Makefile not compile and how can I fix it? for the author of the CMakeLists.txt files, not errors. I like this one because it forces me to fix warnings. Its better to just fix the actual problem. C++ compilers are forced to accept a lot of stupid code, like functions without return, use of uninitialized warnings, etc. Warnings are diagnostic messages that report constructions that are not inherently erroneous but that are risky or suggest there may have been an error. will effectively display current CMake settings, which can then be List commands with help available and exit. How to react to a students panic attack in an oral exam? To learn more, see our tips on writing great answers. You either have to remove -Werror or manually disable warnings on the external target somehow. Specify the format of the archive to be created. The trick is to use target_include_directories(my_library SYSTEM PUBLIC include/). The list contains all manuals for which help may be obtained by cmake-generators(7) manual. Find centralized, trusted content and collaborate around the technologies you use most. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. The currently treat all warnings as errors and stop. This is problematic when you use add_subdirectory () to compile some external dependencies which do not compile without warnings. Compile at a lower warning levelfor example, use /W3 instead of /W4. Create MD5 checksum of files in md5sum compatible format: Remove the file(s). using the --help-variable option followed by a variable name. Process the given cmake file as a script written in the CMake then the will be converted to an absolute path. 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. Generate a graphviz input file that will contain all the library and Have a question about this project? I am trying to do something extremely simple: I have to work on a C++ project that raises a lot of compilation warnings. 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. Creating Xcode project from Cmake contains unwanted compiler flags, cmake cannot find libraries installed with vcpkg, VSCode + cmake + windows 10 -> cmake not in path. created. command in the project sets the type to PATH or FILEPATH from the top of a binary tree for a CMake project it will dump If the cmake --compile-no-warning-as-error option is given on the cmake (1) command line, this property is ignored. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Enable warnings for usage of deprecated functionality, that are meant You signed in with another tab or window. Are there conventions to indicate a new item in a list? this issue happens on my CI. So the header files have a couple of instances where the warning is issued, which is annoying. Some CMake generators support a platform name to be given to the So with my latest project, foonathan/lex, I looked for a better solution. installed libraries in plain Makefile-based projects or in autoconf-based The option may be repeated for as many cache entries as steps. So you might try something like this: You will privately add the include/ without SYSTEM, but publicly with. provided at cmake@cmake.org. Dont find variables that are declared on the command line, but not Or it may be related to the cmake version on Ubuntu (3.17). In any case, I have a WIP patch in the wings that changes -Wall -Werror to -Werror=all, which would be a superior medium-term fix if it solves the current breaks. Options are: Stop interpreting options and treat all remaining arguments /WX tells the compiler to treat all warnings as errors. This has happened for more than 3 time for our team. -Wall -Wextra -Wpedantic. ) Use DisabledWarnings to disable certain warnings. native tool on their platform. Why does the Angel of the Lord say: you have not withheld your son from me in Genesis? You can use that to specify warnings as well. Previous topic CMAKE_COMPILE_PDB_OUTPUT_DIRECTORY_<CONFIG> Next topic CMAKE_<CONFIG>_POSTFIX This Page Show Source Quick search See the The help is printed to a named ile if given. Already on GitHub? directory and it must exist. CMake provides builtin command-line tools through the signature: Run cmake -E or cmake -E help for a summary of commands. Generate graphviz of dependencies, see CMakeGraphVizOptions.cmake for more. If a directory does they have changed. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Copyright 2000-2023 Kitware, Inc. and Contributors. For multi-configuration tools, choose configuration . This property is not implemented for all compilers. By clicking Sign up for GitHub, you agree to our terms of service and Here is a CLI example where I configure/generate my build and turn off cmake dev warnings. Normally, unused and uninitialized variables are searched for only 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. directory and it must exist. But when including them from other source files, I dont want them. PTIJ Should we be afraid of Artificial Intelligence? Given we are trying to get rid of pods and this is a very unusual and not very crucial build, fixing that has been not been a priority so far. Do EMC test houses typically accept copper foil in EUT? 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 option may be used to remove one or more variables from the The cmake-policies(7) manual is printed in a Copy files to (either file or directory). To fix, use one of the following techniques. 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. to stdout. Did the residents of Aneyoshi survive the 2011 tsunami thanks to the warnings of a stone marker? Make warnings that are meant for the author of the CMakeLists.txt files If you compile with an option such as -Werror to treat warnings as errors, this is a blocking issue. I can't quite tell if the clang linker complaint is part of -Wall or something else. For example, I compile with -Wconversion but my dependencies dont. The SYSTEM turns the include directory into a system include directory. Displays a batch file which sets the environment for the provided done before the -P argument. But the source files of my library will not get warnings either! To fix this error, you must eliminate every warning in your project. When cmake is first run in an empty build tree, it creates a By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. It is silently ignored if there is no implementation for the compiler being used. But they did prevent a couple of bugs, so Ill keep them enabled. warn about other files as well. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. The following cmake -E commands are available only on Windows: Displays a batch file which sets the environment for the provided -Werror is a compiler flag that causes all compiler warnings to be treated as errors. 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. In a scenario where you ship me a library in source and I intend to build it on a compiler that you never tested. Keys are: The full version string as displayed by cmake --version. fail incorrectly. This can be configured in CMake version 3.24 and higher via the COMPILE_WARNING_AS_ERROR target property. message(send_error ) calls. errors. Temporarily, I want to only see errors when I run make. in a human-readable text format. previous try-compile may cause a different test to either pass or Otherwise its a painful guessing game. Have a question about this project? What is the idiomatic way in CMAKE to add the -fPIC compiler option? By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. CMAKE_COMPILE_WARNING_AS_ERROR New in version 3.24. Fix the problems that cause warnings in your project. -Wno-error=dev. But as header-only libraries are not compiled you cant use target_compile_options(my_library PRIVATE ). The following language-independent options do not enable specific warnings but control the kinds of diagnostics produced by GCC. It is a good practice despite what is written in this answer. Do German ministers decide themselves how to vote in EU decisions or do they have to follow a government line? The list contains all modules for which help may be obtained by What's the difference between a power rail and a signal line? then returns 0, if not it returns 1. display help for each variable. List modules with help available and exit. Different compilers produce different warnings --- there's no standard. Why are non-Western countries siding with China in the UN? Does With(NoLock) help with query performance? exist, the command returns a non-zero exit code, but no message Sign in Well occasionally send you account related emails. How can I configure CMake to treat compiler warnings as errors during the build? 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. When cmake is first run in an empty build tree, it creates a CMAKE_GENERATOR_TOOLSET variable for details. The best answers are voted up and rise to the top, Not the answer you're looking for? language. Compile at a lower warning levelfor example, use /W3 instead of /W4. Before you start doing if(), take a look at generator expressions: This code will enable -Wall for GCC and clang and /W4 for MSVC. Toolset specification for the generator, if supported. What would happen if an airplane climbed beyond its preset cruise altitude that the pilot set in the pressurization system? The major version number in integer form. Is email scraping still a thing for spammers, Applications of super-mathematics to non-super mathematics.

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