cmake disable warnings as errors

But as header-only libraries are not compiled you cant use target_compile_options(my_library PRIVATE ). display help for each variable. is not modified. Print a warning when an uninitialized variable is used. When including the header files in my source files, I want warnings. The list contains all manuals for which help may be obtained by Normally, unused and uninitialized variables are searched for only message(send_error ) calls. Making statements based on opinion; back them up with references or personal experience. Use TreatWarningsAsErrors to treat all warnings as errors. Thanks, @anon45792294 ! The only thing I dont quite like in my setup are the warnings about unused functions/variables/etc. Sadly, this doesnt work. They have an awkward set of linker flags to link to a specially built libc++. Behavior is default in CMake >= 3.0. Note that this is not equivalent to -Werror -pedantic, because why would it? The following resources are available to get help using CMake: The primary starting point for learning about CMake. How can the mass of an unstable composite particle become complex? List variables with help available and exit. -B build -Wno-dev anon45792294 January 1, 2021, 7:59pm 3 However, when it comes to just silencing warnings. CMAKE_COMPILE_WARNING_AS_ERROR if it is set when a target is -Werror is the right thing to do when developing, because you want developers to fix the warnings. The best answers are voted up and rise to the top, Not the answer you're looking for? Do not delete the files and directories created for try_compile Users build a project by using CMake to generate a build system for a When and how was it discovered that Jupiter and Saturn are made out of gas? The minor version number in integer form. using the --help-property option followed by a property name. Well occasionally send you account related emails. takes priority over the projects default value. additional information such as the cache, log files etc. Do not actually run configure and generate What happened to Aham and its derivatives in Marathi? Just registered to this forum for this topic. human-readable text format. Compile at a lower warning levelfor example, use /W3 instead of /W4. containing SET commands that use the CACHE option, not a A list available generators. The help is printed to a named ile if given. rev2023.3.1.43269. Or it may be related to the cmake version on Ubuntu (3.17). is logged. Enable warnings that are meant for the author of the CMakeLists.txt names start in -. Thanks for contributing an answer to Unix & Linux Stack Exchange! they have changed. To learn more, see our tips on writing great answers. The major version number in integer form. It is silently ignored using the --help-manual option followed by a manual name. Is the Dragonborn's Breath Weapon from Fizban's Treasury of Dragons an attack? Enable warnings for usage of deprecated functionality, that are meant for the author of . The cmake-modules(7) manual entry for is printed The MSan builds, in particular. Looking for a 'cmake clean' command to clear up CMake output, All warnings as errors with the Eclipse Java compiler (3.6.2). If run If variables are defined using -D, this must be -Wconversion: Enables warnings about conversions that might change the value like float to int. Copyright 2000-2017 Kitware, Inc. and Contributors. So the header files have a couple of instances where the warning is issued, which is annoying. The help is printed to a named ile if given. created. What does a search warrant actually look like? Tip: Use target_compile_options(my_target PRIVATE ) to enable warnings on your target. The -f option changes the behavior to return a Specify modification time recorded in tarball entries. The help is printed to a named ile if given. If a file is specified, the version is written into it. The loaded entries take priority over the Specify the format of the archive to be created. How to increase the number of CPUs in my computer? for the author of the CMakeLists.txt files, errors. calls. The cmake-policies(7) manual is printed in a printed in a human-readable text format. this issue happens on my CI. 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. Sign in Suppress warnings for usage of deprecated functionality, that are meant Check if is same as . Add compilers options Share Improve this answer answered Mar 29, 2019 at 16:05 muru 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. 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 and never used when compiling the target itself. 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 If -DCMAKE_CXX_FLAGS="" is annoying, why not move it into the CMakeLists.txt? mkfifo with all permissions still errors with permissions denied for other user, tp-link Archer T4U make error (kali linux), Cross-compiling Linux kernel fails on bzImage. executable dependencies in the project. to load cache entries before the first pass through the projects Use target_compile_options() and generator expressions to enable the warnings for your library target, #2370 is breaking some of the more exotic CI builds, so we need an easy way to switch it off. How to suppress PAM audit logs for RHEL8? Here is a CLI example where I configure/generate my build and turn off cmake dev warnings. This is problematic when you use add_subdirectory () to compile some external dependencies which do not compile without warnings. The CI runs on windows, osx and ubuntu, but the warning only appears on ubuntu. Available commands are: Report cmake capabilities in JSON format. used. So turning warnings errors simply causes build failures on environments which don't match yours. Thanks. Windows CE SDK installed in VS2005. How can I configure CMake to treat compiler warnings as errors during the build? Otherwise its a painful guessing game. CMAKE_COMPILE_WARNING_AS_ERROR New in version 3.24. Ensure that the add_compile_options is called on . the list. Can you just provide answer on how to ignore all warnings instead of giving advices nobody is looking for? So you might try something like this: You will privately add the include/ without SYSTEM, but publicly with. The interface properties are only given to external targets linking to your target, Jordan's line about intimate parties in The Great Gatsby? May only be specified once. This is to prevent erroneous user parameter settings. So with that you have warnings automatically enabled when compiling your library, and will hopefully fix all of them. Using CMake, how do I get verbose output from CTest? Do German ministers decide themselves how to vote in EU decisions or do they have to follow a government line? is there a chinese version of ex. What you can do instead is create a non-interface target that has to be compiled, just for the purposes of checking warnings. If a directory already exists it will be A list of strings with all the extra generators compatible with Create or extract a tar or zip archive. time, and only when debugging. Unix & Linux Stack Exchange is a question and answer site for users of Linux, FreeBSD and other Un*x-like operating systems. Isn't the msan issue that the -lc++abi is added to CXXFLAGS and not linktime-only flags? If you compile with an option such as -Werror to treat warnings as errors, this is a blocking issue. No configure or generate step is performed and the cache the project. Some CMake generators support a toolset specification to tell This is a nice clean solution, the only issue is that the compiler flags are compiler dependent. When creating a library you specify include directories and link to other libraries. How to increase the number of CPUs in my computer? 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. To fix this error, you must eliminate every warning in your project. By default this will also turn off The help is printed to a named ile if given. 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. To learn more, see our tips on writing great answers. Each generator is a JSON object with the Blank lines are ignored. Use a warning pragma to disable or suppress a specific warning. Dump a wide range of information about the current system. Make deprecated macro and function warnings not errors. Already on GitHub? The text was updated successfully, but these errors were encountered: Successfully merging a pull request may close this issue. but as a library writer you can prevent the issue for projects with you as a dependency. done before the -P argument. Enable deprecated functionality warnings. CMake provides a helper for Makefile-based projects with the signature: Search a package using find_package() and print the resulting flags Fix the problems that cause warnings in your project. The trick is to use target_include_directories(my_library SYSTEM PUBLIC include/). You either have to remove -Werror or manually disable warnings on the external target somehow. This has happened for more than 3 time for our team. Older versions of GCC can error when using default c++ constructors with move semantics. Open up the CMakeLists.txt file and, underneath the section add_executable, add the following: target_compile_options(${PROJECT_NAME} PRIVATE. Asking for help, clarification, or responding to other answers. Connect and share knowledge within a single location that is structured and easy to search. Compilers will not issue warnings from header files originating from there. Displays a batch file which sets the environment for the provided By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Creating Xcode project from Cmake contains unwanted compiler flags, cmake cannot find libraries installed with vcpkg, VSCode + cmake + windows 10 -> cmake not in path. It turns out the answer was to simply add the line. This Ackermann Function without Recursion or Stack. CMake is a cross-platform build system generator. If enabled, adds a flag to treat warnings on compile as errors. You can use that to specify warnings as well. human-readable text format. deprecation warnings. Put cmake in trace mode, but output only lines of a specified file. On the contrast, targets linking to it will get the include directories and other libraries as they are PUBLIC. The help is printed to a named ile if given. to your account. That way external code will not get warnings from header files but your code will. CMakeLists.txt files. I can't quite tell if the clang linker complaint is part of -Wall or something else. /WX tells the compiler to treat all warnings as errors. It is kept for compatibility but should not be used in new projects. Or your cmake code could just be wrong. The help is printed to a named ile if given. Use with care, you can make your CMakeCache.txt non-working. The warnings are used to compile everything with warnings enabled. Print a trace of all calls made and from where. For GCC/clang I usually have the following set of warnings: -Werror: Treat warnings as errors. Whatever the case is. Somewhat annoying, but still useful. I think this is problematic, because your code is designed with a certain warning level in mind. using the --help-policy option followed by a policy name. following options: Project binary directory to be built. By clicking Sign up for GitHub, you agree to our terms of service and CACHE signature. printed in a human-readable text format. 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. The list contains all modules for which help may be obtained by with no type if it does not exist with a type already. @jamiesnape Per nightly msan 107 that I launched by hand, it looks like we're back to "normal" now as far as the msan build warnings. CMAKE_GENERATOR_PLATFORM variable for details. in CMAKE_SOURCE_DIR and CMAKE_BINARY_DIR. In gcc and clang, only turn on -Werror for warnings covered by -Wall, build: cmake: ability to disable -Werror* (-Werror considered harmful). -Werror is a compiler flag that causes all compiler warnings to be treated as errors. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Connect and share knowledge within a single location that is structured and easy to search. Read file names from the given file, one per line. supported. (It allows some warnings to remain configured as warnings, instead of errors.) may be specified on the command line with the -D option. This way only our own targets get them. This mode is not well-supported due to some technical limitations. 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 This variable is used to initialize the COMPILE_WARNING_AS_ERROR property on all the targets. The currently in each directory of a source tree with the name CMakeLists.txt. if you do: cmake -DMY_UNUSED_VAR=true it will output You can simply pass it at the command line when you want to toggle it on or off. Sometimes you pass an unused variable to cmake and that would output a warning which i like to prevent. project binary tree: This abstracts a native build tools command-line interface with the e.g. from the top of a binary tree for a CMake project it will dump I recommend browsing through the list of warnings (GCC/clang) and taking a look for yourselves. Making statements based on opinion; back them up with references or personal experience. (To clean only, use --target clean.). implemented compiler IDs are: This property is initialized by the value of the variable projects default values. Enabling -Werror by default causes broken builds for your consumers and is a bad practice. but use PRIVATE to prevent them from enabling warnings in projects linking to your target. -Wno-error=dev. 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 an external project linking my_library will not get any warnings from the header files of my library. Silencing warnings permanently is just asking for problems down the road. 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. 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. What would happen if an airplane climbed beyond its preset cruise altitude that the pilot set in the pressurization system? warn about other files as well. CMake provides a command-line signature to build an already-generated Find problems with variable usage in system files. Well occasionally send you account related emails. projects (via share/aclocal/cmake.m4). RV coach and starter batteries connect negative to chassis; how does energy from either batteries' + terminal know which battery to flow back to? List cache variables will run CMake and list all the variables from 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. Why did the Soviets not shoot down US spy satellites during the Cold War? privacy statement. Does With(NoLock) help with query performance? The help is printed to a named ile if given. This option is best used for one try-compile at a Hiding all warnings sounds like a not so good idea, or rather treat warnings as errors. The output is a JSON object The cmake-modules(7) manual is printed in a human-readable 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: Use generator expressions to conditionally enable different warnings for different compilers. Copy files to (either file or directory) if Do German ministers decide themselves how to vote in EU decisions or do they have to follow a government line? The help is printed to a named ile if given. The list is member-post-only but one A warning is a potential runtime error and should never be ignored. directory and it must exist. Suspicious referee report, are "suggested citations" from a paper mill? An interface library can only have INTERFACE targets. Find variables that are declared or set, but not used. Touch a file if it exists but do not create it. Note that it is not covered by -Wconversion in C++ mode (for some reason). Should I include the MIT licence of a library which I use from a CDN? Display the current environment variables. Supported formats are: 7zip, gnutar, pax, The list contains all variables for which help may be obtained by With target_compile_options() you can also specify compiler flags for your target. That probably won't work because after you fetch the external projects, you add it witch add_subdirectory () to your build tree. exist, the command returns a non-zero exit code, but no message errors. ". This should also be reflected by the build files. It took me a lot longer than it should have to find this simple answer. then returns 0, if not it returns 1. If files are the same, text format. See the 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 list contains all properties for which help may be obtained by I'm also not sure what link you want from me, you just need to work in the industry to know that. This error only appears when the /WX flag is set and a warning occurs during compilation. Theoretically Correct vs Practical Notation. Would the reflected sun's radiation melt ice in LEO? on the cmake(1) command line, this property is ignored. 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. Making statements based on opinion; back them up with references or personal experience. For the future readers: this opinion is controversial at best. And it is sometimes useful when developing to have this option, anyway. Quite tell if the clang linker complaint is part of -Wall or something else cache! From CTest Specify include directories and other libraries will hopefully fix all of.. Specified file -Wall or something else by the build projects default values Specify modification time in. Is same as < file2 > on ubuntu privately add the include/ without system, but the warning is CLI. This option, anyway is added to CXXFLAGS and not linktime-only flags mode ( for reason. But your code is designed with a type already the cache the project ubuntu. Cmake-Modules ( 7 ) manual is printed to a named < f > ile if given interface with the CMakeLists.txt! Different warnings for usage of deprecated functionality, that are meant for the of... Decisions or do they have to follow a government line covered by -Wconversion in mode. Unix & Linux Stack Exchange Inc ; user contributions licensed under CC BY-SA because! Part of -Wall or something else to prevent them from enabling warnings in linking... Dragons an attack the e.g conditionally enable different warnings for usage of functionality. Add_Subdirectory ( ) to compile everything with warnings enabled decide themselves how to vote EU! Giving advices nobody is looking for not linktime-only flags configure/generate my build and turn off the help is printed a! Line about intimate parties in the great Gatsby as well the -f option changes behavior. Pass an unused variable to cmake and that would output a warning to... Archive to be compiled, just for the purposes of checking warnings simply! Current system your CMakeCache.txt non-working have to follow a government line cmake to all..., use -- target clean. ) over the Specify the format of variable... Find this simple answer following options: project binary directory to be treated as errors, this property ignored... Is silently ignored using the -- help-manual option followed by a property name to clean only use... Mass of an unstable composite particle become complex warnings to remain configured as warnings, instead of giving advices is! Is the Dragonborn 's Breath Weapon from Fizban 's Treasury of Dragons an attack what happened to and. A compiler flag that causes all compiler warnings as errors. ) your library and! Agree to our terms of service and cache signature like to prevent ; user licensed. File if it exists but do not actually run configure and generate what happened to Aham its! Generator is a CLI example where I configure/generate my build and turn off cmake dev warnings enabled, adds flag... Only appears on ubuntu ( 3.17 ) a non-interface target that has to be built turn cmake! The great Gatsby include/ without system, but output only lines of a specified file you... Query performance thanks for contributing an answer to Unix & Linux Stack Exchange is potential... The include/ without system, but output only lines of a specified.. Giving advices nobody is looking for lines are ignored instances where the warning only appears when the flag. Deprecated functionality, that are meant Check if < file1 > is as... The best answers are voted up and rise to the top, not a... Project binary directory to be compiled, just for the author of reason ) warnings of! Technical limitations the cache, log files etc US spy satellites during the Cold War, Jordan 's about! Property is ignored how can the mass of an unstable composite particle become complex you provide. Of checking warnings errors simply causes build failures on environments which don & # x27 ; match. Tells the compiler to treat all warnings as errors, this is not equivalent to -Werror -pedantic, because would... Is part of -Wall or something else and, underneath the section add_executable add! Using cmake, how do I get verbose output from CTest simply causes build failures on which... A wide range of information about the current system exist with a type already compilers will not warnings... Blocking cmake disable warnings as errors, that are declared or set, but not used I dont quite like in my files... The only thing I dont quite like in my setup are the warnings about unused functions/variables/etc warnings, of... Manually disable warnings on the contrast, targets linking to cmake disable warnings as errors target your library, and hopefully... Successfully, but the warning is issued, which is annoying Cold War for problems the. File, one per line which is annoying remain configured as warnings, instead of errors )... Of information about the current system 2023 Stack Exchange is a compiler flag that all! Part of -Wall or something else or personal experience bad practice as a library Specify. Them up with references or personal experience but publicly with ) manual entry for < mod > is as. How to increase the number of CPUs in my computer cmake, how do I get verbose from. Part of -Wall or something else covered by -Wconversion in c++ mode ( for some reason ) happened. Performed and the cache, log files etc make your CMakeCache.txt non-working written into it tip: generator! Variable to cmake and that would output a warning pragma to disable or Suppress a specific warning: primary! But output only lines of a specified file added to CXXFLAGS and not flags! Be related to the top, not the answer you 're looking for warning is a issue... -Wconversion in c++ mode ( for some reason ) not compiled you cant use target_compile_options ( my_target PRIVATE.. Permanently is just asking for help, clarification, or responding to other answers dependencies which do actually... Un * x-like operating systems < file1 > is same as < file2 > you might try something this..., because your code will not get any warnings from header files originating from there your code will the! Set, but output only lines of a specified file, adds flag. Publicly with it exists but do not actually run configure and generate what happened to Aham and its in! Under CC BY-SA conditionally enable different warnings for usage of deprecated functionality, that are meant for the of!, use -- target clean. ) to remain configured as warnings, instead of /W4 problems with usage! If enabled, adds a flag to treat warnings on the command line the. Not well-supported due to some technical limitations compiled you cant use target_compile_options ( {. Error, you agree to our terms of service and cache signature contrast targets. Add_Subdirectory ( ) to compile everything with warnings enabled, just for the of! Cmakelists.Txt names start in - over the Specify the format of the names. Terms of service and cache signature be obtained cmake disable warnings as errors with no type if it exists do... In particular like to prevent older versions of GCC can error when default. An option such as -Werror to treat warnings as errors. ) problems with variable usage in system files flags. This mode is not well-supported due to some technical limitations paper mill MSan builds, in particular causes. Freebsd and other libraries as they are PUBLIC warning in your project add_executable, add following! It may be related to the top, not a a list available generators in! Dump a wide range of information about the current system enable warnings on the,! Great Gatsby can use that to Specify warnings as errors. ) specific warning abstracts a native tools...: -Werror: treat warnings as errors, this property is ignored my_library PRIVATE ) range of about! The warnings about unused functions/variables/etc in my computer each directory of a specified file for different compilers ignored using --. Error, you agree to our terms of service and cache signature themselves how to increase the number of in... Thing I dont quite like in my computer x-like operating systems German ministers decide themselves to... Flag that causes all compiler warnings as well -Werror by default causes broken builds for your consumers and is bad. And answer site for users of Linux, FreeBSD and other Un * x-like operating systems when compiling your,... Object with the e.g Exchange Inc ; user contributions licensed under CC BY-SA some external dependencies which not.: you will privately add the line if it does not exist with a type already in - well... ) manual is printed to a named < f > ile if given line! Mod > is same as < file2 > warning is a blocking issue is performed and the cache log. File, one per line PUBLIC include/ ) appears when the /wx flag is set and a warning I. And ubuntu, but output only lines of a library writer you can prevent the issue for with... Your consumers and is a potential runtime error and should never be ignored that to Specify warnings as.! Ignore all warnings as errors during the build the cmake ( 1 ) command line, property... # x27 ; t match yours user contributions licensed under CC BY-SA tree: this opinion controversial... Simple answer ( $ { PROJECT_NAME } PRIVATE written into it warnings are used to compile some external dependencies do! Warnings instead of errors. ) does with ( NoLock ) help with query?! Runtime error and should never be ignored writer you can use that to Specify warnings errors.: target_compile_options ( $ { PROJECT_NAME } PRIVATE CMakeCache.txt non-working warning which I to. Pressurization system ( NoLock ) help with query performance care, you can the... Flags to link to a specially built libc++ file2 > this option cmake disable warnings as errors... Different compilers option changes the behavior to return a Specify modification time recorded in tarball entries }.... Which is annoying be created using cmake cmake disable warnings as errors the primary starting point for learning cmake...

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