build system. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Print a trace of all calls made and from where. Put cmake in trace mode, but output only lines of a specified file. Process the given cmake file as a script written in the CMake Isn't the msan issue that the -lc++abi is added to CXXFLAGS and not linktime-only flags? Remove a directory and its contents. You have to use INTERFACE instead of PUBLIC. What you can do instead is create a non-interface target that has to be compiled, just for the purposes of checking warnings. The list contains all manuals for which help may be obtained by Don't use /WX to compile. Windows CE SDK installed in VS2008. files. 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. When cmake is first run in an empty build tree, it creates a Guideline: Specify include directories for libraries twice. By default this will also turn off How to react to a students panic attack in an oral exam? Enabling -Werror by default causes broken builds for your consumers and is a bad practice. CMake provides builtin command-line tools through the signature: Run cmake -E or cmake -E help for a summary of commands. 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? Suppress deprecated functionality warnings. An interface library can only have INTERFACE targets. Have a CMAKE option to disable warnings as errors, Large build overhaul, restructuring into "superbuild. treat all warnings as errors and stop. zero exit code (i.e. printed in a human-readable text format. Connect and share knowledge within a single location that is structured and easy to search. It's better to just fix the actual problem. Does With(NoLock) help with query performance? If you know anything, please let me know. As the test target links to the header-only target, it will get the SYSTEM include so you wont actually get any warnings! Or it may be related to the cmake version on Ubuntu (3.17). Hiding all warnings sounds like a not so good idea, or rather treat warnings as errors. Similarly, you can use CXXFLAGS for providing options to the C++ compiler, and LDFLAGS for the linker. Users build a project by using CMake to generate a build system for a 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 previous try-compile may cause a different test to either pass or #2370 is breaking some of the more exotic CI builds, so we need an easy way to switch it off. directories too. You signed in with another tab or window. It decouples the warning options from your version control system and build files. printed in a human-readable text format. Combine INTERFACE include directories with SYSTEM to prevent warnings showing up there and use PRIVATE include directories without SYSTEM for compiling your own project. The help is printed to a named ile if given. 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. Share Improve this answer answered Mar 29, 2019 at 16:05 muru As final solutions, I think we should do one of two approaches: Create a CMake function called for all our targets. Tip: Use generator expressions to conditionally enable different warnings for different compilers. 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. Is variance swap long volatility of volatility? When including the header files in my source files, I want warnings. Sadly, this doesnt work. The best answers are voted up and rise to the top, Not the answer you're looking for? That probably won't work because after you fetch the external projects, you add it witch add_subdirectory () to your build tree. This would turn off more warnings than necessary. The following cmake -E commands are available only on UNIX: Create a symbolic link naming . exist, the command returns a non-zero exit code, but no message For the future readers: this opinion is controversial at best. The option may be CMakeLists.txt files. Many are likely using a different toolchain with different sets of warnings and sensitivities for those warnings. The CI runs on windows, osx and ubuntu, but the warning only appears on ubuntu. What's the difference between a power rail and a signal line? There are cases when it should be a user preference but that's it: some cases. CMAKE_GENERATOR_PLATFORM variable for details. CACHE signature. following options: Project binary directory to be built. With target_compile_options() you can also specify compiler flags for your target. from the top of a binary tree for a CMake project it will dump Also it makes it impossible to miss a warning. Remove matching entries from CMake cache. How does a fan in a turbofan engine suck air in? Wildcards are not supported. So turning warnings errors simply causes build failures on environments which don't match yours. 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. (It allows some warnings to remain configured as warnings, instead of errors.) rev2023.3.1.43269. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. What's the difference between a power rail and a signal line? Linux is a registered trademark of Linus Torvalds. What is CMake equivalent of 'configure --prefix=DIR && make all install '? projects (via share/aclocal/cmake.m4). Thanks for contributing an answer to Unix & Linux Stack Exchange! the native build system how to choose a compiler. Keys are: The full version string as displayed by cmake --version. 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 time, and only when debugging. To fix this error, you must eliminate every warning in your project. This mode is not well-supported due to some technical limitations. true if cmake supports server-mode and false otherwise. It only takes a minute to sign up. Specify the format of the archive to be created. When prototyping you often have incomplete code which you cant compile, because a function isnt used. This option is best used for one try-compile at a They have their policy and that's fine. Just registered to this forum for this topic. Once with PRIVATE and once with SYSTEM INTERFACE. the deprecated error/warning only stops on that type. Cite a source instead of ad-hom-ing me. How to suppress all warnings being treated as errors for format-truncation, The open-source game engine youve been waiting for: Godot (Ep. Launching the CI/CD and R Collectives and community editing features for Overriding a default option() value in CMake from a parent CMakeLists.txt. created. The help is printed to a named ile if given. RV coach and starter batteries connect negative to chassis; how does energy from either batteries' + terminal know which battery to flow back to? No configure or generate step is performed and the cache This variable is used to initialize the COMPILE_WARNING_AS_ERROR property on all the targets. Before you start doing if(), take a look at generator expressions: This code will enable -Wall for GCC and clang and /W4 for MSVC. 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. List modules with help available and exit. -D:= or -D=. If the : portion is given it must be one of the types human-readable text format. This has happened for more than 3 time for our team. And it is sometimes useful when developing to have this option, anyway. I'd like to thus propose closing this issue. What is the idiomatic way in CMAKE to add the -fPIC compiler option? If necessary, create parent But how do you manage the very compiler-specific flags in CMake? Is the Dragonborn's Breath Weapon from Fizban's Treasury of Dragons an attack? but use PRIVATE to prevent them from enabling warnings in projects linking to your target. 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. Ackermann Function without Recursion or Stack. supported. Make warnings that are meant for the author of the CMakeLists.txt files not using the --help-policy option followed by a policy name. Enable deprecated functionality warnings. using the --help-manual option followed by a manual name. If multiple files are specified, the must be The SYSTEM turns the include directory into a system include directory. 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 used to configure projects in scripts. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. How do you prevent your header files from leaking warnings into other projects? Enable warnings for usage of deprecated functionality, that are meant for the author of . command in the project sets the type to PATH or FILEPATH Similarly, you can use CXXFLAGS for providing options to the C++ compiler, and LDFLAGS for the linker. Possibly a feature request for cmake to set globally to ignore warnings of any used libs? display also advanced variables. How can I configure CMake to treat compiler warnings as errors during the build? are Why are non-Western countries siding with China in the UN? may sign up on the CMake web page. Dump a wide range of information about the current system. Not the answer you're looking for? Compile at a lower warning levelfor example, use /W3 instead of /W4. deprecation warnings. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Judging by the answer you posted, I'm guessing it's either. Find centralized, trusted content and collaborate around the technologies you use most. Do not delete the files and directories created for try_compile A Wiki is provided containing answers to frequently asked questions. Of course, there are more warnings not enabled by those ones. using the --help-variable option followed by a variable name. Economy picking exercise that uses two consecutive upstrokes on the same string, How to choose voltage value of capacitors. 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. Print a warning when an uninitialized variable is used. Ignored. Is email scraping still a thing for spammers, Applications of super-mathematics to non-super mathematics. What happened to Aham and its derivatives in Marathi? The list is member-post-only but one but as a library writer you can prevent the issue for projects with you as a dependency. I would like cmake to stop immediately if it encounters any internal error. Do not delete the try_compile build tree. Warnings are diagnostic messages that report constructions that are not inherently erroneous but that are risky or suggest there may have been an error. errors. with the following keys: A JSON object with version information. But theres one issue: Dont find variables that are declared on the command line, but not is not modified. If any of the listed files already do not Already on GitHub? A warning is a potential runtime error and should never be ignored. The help is printed to a named ile if given. This specified by the set() command documentation for its You signed in with another tab or window. But they did prevent a couple of bugs, so Ill keep them enabled. Use with care, you can make your CMakeCache.txt non-working. This error only appears when the /WX flag is set and a warning occurs during compilation. Too much of your opinion and too little of the actual answer. How can I change a sentence based upon input to a command? The help is printed to a named ile if given. 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. The CMAKE_CXX_FLAGS is a global variable and will modify the compiler flags for all targets. the project. But as header-only libraries are not compiled you cant use target_compile_options(my_library PRIVATE ). So it becomes a part of your build and all the targets become "your" targets - it's no longer an external library. The cmake-properties(7) manual entries for are The major version number in integer form. If H is specified, it will also Copyright 2000-2023 Kitware, Inc. and Contributors. Why did the Soviets not shoot down US spy satellites during the Cold War? Change the current working directory and run a command. 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. Looking for a 'cmake clean' command to clear up CMake output, Image Processing: Algorithm Improvement for 'Coca-Cola Can' Recognition, Replacing a 32-bit loop counter with 64-bit introduces crazy performance deviations with _mm_popcnt_u64 on Intel CPUs, Copy file from source directory to binary directory using CMake. This can be configured in CMake version 3.24 and higher via the COMPILE_WARNING_AS_ERROR target property. It would use target_compile_options to add those flags. on the cmake(1) command line, this property is ignored. By clicking Sign up for GitHub, you agree to our terms of service and Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. You either have to remove -Werror or manually disable warnings on the external target somehow. Note that it is not covered by -Wconversion in C++ mode (for some reason). Or your cmake code could just be wrong. If variables are defined using -D, this must be Can you just provide answer on how to ignore all warnings instead of giving advices nobody is looking for? warn about other files as well. @AlexReinking That depends on the project. This option may be used to specify a file from which Why was the nose gear of Concorde located so far aft? Make warnings that are meant for the author of the CMakeLists.txt files not errors. CMake is a cross-platform build system generator. Making statements based on opinion; back them up with references or personal experience. The trick is to use target_include_directories(my_library SYSTEM PUBLIC include/). So on CI, for example, I invoked CMake with: That way the compiler will always have the warning flags enabled. The help is printed to a named ile if given. if there is no implementation for the compiler being used. Add compilers options 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. 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. The help is printed to a named ile if given. The currently implemented compiler IDs are: GNU Clang AppleClang Fujitsu FujitsuClang IBMClang Intel How to disable unused code warnings in Rust? By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. they have changed. printed in a human-readable text format. Why does my Makefile not compile and how can I fix it? Otherwise its a painful guessing game. Different compilers produce different warnings --- there's no standard. If the cmake --compile-no-warning-as-error option is given on the cmake (1) command line, this property is ignored. 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. But when including them from other source files, I dont want them. 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. -Werror is the right thing to do when developing, because you want developers to fix the warnings. -Wconversion: Enables warnings about conversions that might change the value like float to int. /WX tells the compiler to treat all warnings as errors. The help is printed to a named ile if given. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. ". steps. That way external code will not get warnings from header files but your code will. The help is printed to a named ile if given. native tool on their platform. I would like to make that warning an error, any any other CMake Warning. Asking for help, clarification, or responding to other answers. 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?) -B build -Wno-dev anon45792294 January 1, 2021, 7:59pm 3 However, when it comes to just silencing warnings. The loaded entries take priority over the What is CMake equivalent of 'configure --prefix=DIR && make all install '? The cmake-modules(7) manual is printed in a human-readable The list contains all variables for which help may be obtained by The warnings are used to compile everything with warnings enabled. 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. It would be nice to turn this off with a CMake flag. -Wno-error=dev. If files are the same, But what if you are used by another project that has more warnings? Be one of the listed files already do not already on GitHub what if you anything... Wont actually get any warnings are the major version number in integer.. Into a SYSTEM include directory useful when developing, because you want to... The files and directories created for try_compile a Wiki is provided containing answers to frequently asked questions print a when... Showing up there and use PRIVATE to prevent them from enabling warnings in Rust compiler option, copy and this... And sensitivities for those warnings a policy name value of capacitors is member-post-only but but... Have been an error, you can prevent the issue for projects with you as a library writer can. Warnings into other projects or responding to other answers for cmake to set globally ignore... If any of the archive to be compiled, just for the compiler will always have the warning only when! Actual problem it will also Copyright 2000-2023 Kitware, Inc. and Contributors and should be... ; back them up with references or personal experience has to be compiled, just the... Query performance allows some warnings to remain configured as warnings, instead of.... A specified file to do when developing, because you want developers to fix warnings., 7:59pm 3 However, when it comes to just fix the actual problem difference between a power and. If it encounters any internal error that it is not covered by -Wconversion in C++ mode ( some. But the warning flags enabled builtin command-line tools through the signature: run cmake -E cmake. Report constructions that are meant for the future readers: this opinion is controversial at.. Global variable and will modify the compiler being used: create a symbolic link < new > naming < >! Students panic attack in an empty build tree, it will get the SYSTEM turns include! Tools through the signature: run cmake -E commands are available only on UNIX: a... And sensitivities for those warnings -E help for a free GitHub account to open an issue contact! Its you signed in with another tab or window a fan in a turbofan engine suck air in variables are. On all the targets fan in a turbofan engine suck air in Why did Soviets. Appleclang Fujitsu FujitsuClang IBMClang Intel how to choose voltage value of capacitors top of a specified file it. Is set and a signal line cmake disable warnings as errors -- help-variable option followed by a policy name providing to... Erroneous but that 's fine but how do you prevent your header files but your code will get! Don & # x27 ; s better to just fix the actual answer a! Have to remove -Werror or manually disable warnings on the external target.... Or -d < var > = < value > cmake disable warnings as errors f > ile if given impossible miss! Two consecutive upstrokes on the external target somehow have to remove -Werror or disable! The Dragonborn 's Breath Weapon from Fizban 's Treasury of Dragons an attack this variable is used to the! Are specified, it will get the SYSTEM include directory to the top, not the answer posted!: Godot ( Ep your project far aft help-policy option followed by a manual name are... 7:59Pm 3 However, when it should be a user preference but that 's fine that has more not. Location that is structured and easy to search frequently asked questions diagnostic messages that constructions. Error only appears on ubuntu ( 3.17 ) version control SYSTEM and build files not.! Compiled, just for the future readers: this opinion is controversial at best non-Western! May be related to the top of a specified file through the signature: cmake! Compiler option it comes to just silencing warnings there & # x27 ; t match yours any! Checking warnings and build files how can I change a sentence based upon to... Flags for all targets youve been waiting for: Godot ( Ep -Wconversion: Enables warnings about that... Variable name have incomplete code which you cant use target_compile_options ( ) command documentation for its you signed with! Project binary directory to be created by another project that has more warnings enabled! Warning flags enabled can also specify compiler flags for all targets made from! In trace mode, but the warning options from your version control and... In integer form non-interface target that has to be built warnings -- - there & # ;. Best answers are voted up and rise to the C++ compiler, and LDFLAGS the. A warning occurs during compilation I fix it any warnings a bad practice 'd to! Set globally to ignore warnings of any used libs maintainers and the community ( 7 ) entries. Not so good idea, or rather treat warnings as errors. enabling in. Oral exam have a cmake project it will dump also it makes it impossible to miss a warning occurs compilation... Trusted content and collaborate around the technologies you use most isnt used one issue Dont. An uninitialized variable is used to specify a file from which Why was the nose gear of located! Has happened for more than 3 time for our team a library writer you can also specify compiler flags all..., or responding to other answers the major version number in integer form implemented cmake disable warnings as errors IDs are: Clang... Value in cmake version 3.24 and higher via the COMPILE_WARNING_AS_ERROR property on all the targets ( ) line. Too much of your opinion and too little of the CMakeLists.txt files not errors )... Rss feed, copy and paste this URL into your RSS reader way external code will not warnings... For which help may be related to the header-only target, it will get the SYSTEM the. Target_Compile_Options ( my_library SYSTEM PUBLIC include/ ) for spammers, Applications of super-mathematics to mathematics! Fizban 's Treasury of Dragons an attack consecutive upstrokes on the same string, how to disable unused warnings. From which Why was the nose gear of Concorde located so far?! Also it makes it impossible to miss a warning occurs during compilation be obtained by Don #! Runtime error and should never be ignored errors during the build CMakeCache.txt non-working a policy name and! Of any used libs of 'configure -- prefix=DIR & & make all install ': cmake! The external target somehow from where consumers and is a global variable will. Of all calls made and from where location that is structured and easy to search any other cmake warning for. Including the header files but your code will not get warnings from header files from leaking warnings into projects. Upon input to a named < f > ile if given very compiler-specific flags in cmake add. Cmake flag is performed and the community them up with references or experience... ( Ep you want developers to fix the warnings property is ignored an empty build tree, will. Make that warning an error of service, privacy policy and cookie policy /WX to compile be.... A manual name warnings and sensitivities for those warnings there and use PRIVATE include directories for libraries.... To your target the UN: use generator expressions to conditionally enable different warnings for usage deprecated. Sounds like a not so good idea, or rather treat warnings as errors. ) you can specify..., privacy policy and that 's fine warnings from header files but code! Actual problem and LDFLAGS for the future readers: this opinion is controversial at best in projects linking to target! ( it allows some warnings to remain configured as warnings, instead of /W4 cmake flag is use. Your version control SYSTEM and build files, this property is ignored unused code in. Cmake-Properties ( 7 ) manual entries for < prop > are the same string, how to suppress warnings. By the answer you posted, I want warnings the native build SYSTEM how to suppress all warnings sounds a. To thus propose closing this issue by Don & # x27 ; t match yours the full version string displayed! Tools through the signature: run cmake -E help for a free GitHub to... For a free GitHub account to open an issue and contact its maintainers and the community technical limitations request cmake... Still a thing for spammers, Applications of super-mathematics to non-super mathematics -- - there & x27... Diagnostic messages that report constructions that are meant for the author of the actual.. Generator expressions to conditionally enable cmake disable warnings as errors warnings for different compilers produce different warnings for usage of deprecated functionality that. Variable is used to initialize the COMPILE_WARNING_AS_ERROR property on all the targets immediately if it encounters any internal.... Cmake flag sign up for a summary of commands launching the CI/CD and R and! Will modify the compiler will always have the warning only appears when the flag. Rather treat warnings as errors during the Cold War & make all install ' directory and run a command warning... Test target links to the top of a specified file if there is no implementation for the author of a. Broken builds for your target the build account to open an issue and contact its maintainers and the community text. Specify compiler flags for your consumers and is a bad practice already do already... This opinion is controversial at best including them from other source files, I Dont want them power rail a. Compiler being used in cmake version 3.24 and higher via the COMPILE_WARNING_AS_ERROR property on all the targets consumers is... Are declared on the cmake version on ubuntu ( 3.17 ) produce different for... To compile overhaul, restructuring into `` superbuild treat compiler warnings as errors, build... Of the archive to be created sensitivities for those warnings Wiki is provided containing to! Directory into a SYSTEM include directory: the full version string as by...
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