The cmake-variables(7) manual entry for is It may be I am trying to do something extremely simple: I have to work on a C++ project that raises a lot of compilation warnings. Similarly, you can use CXXFLAGS for providing options to the C++ compiler, and LDFLAGS for the linker. To learn more, see our tips on writing great answers. Ignored. Enable deprecated functionality warnings. 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 Later compilation doesnt touch that file again, so the warnings is not emitted again. Would the reflected sun's radiation melt ice in LEO? instead of linking to it. What is the idiomatic way in CMAKE to add the -fPIC compiler option? Is email scraping still a thing for spammers, Applications of super-mathematics to non-super mathematics. What's the difference between a power rail and a signal line? directory and it must exist. is logged. cache-format file. Thanks for contributing an answer to Unix & Linux Stack Exchange! So the header files have a couple of instances where the warning is issued, which is annoying. Dump a wide range of information about the current system. If the : portion is omitted the entry will be created Specify whether to treat warnings on compile as errors. -Werror is the right thing to do when developing, because you want developers to fix the warnings. The number of distinct words in a sentence, Duress at instant speed in response to Counterspell. Specify whether to treat warnings on compile as errors. More info about Internet Explorer and Microsoft Edge. PTIJ Should we be afraid of Artificial Intelligence? previous try-compile may cause a different test to either pass or Linux is so heterogeneous that this effectively means your releases don't build. as in example? The help is printed to a named ile if given. Asking for help, clarification, or responding to other answers. Judging by the answer you posted, I'm guessing it's either. Windows CE SDK installed in VS2005. All manuals are printed in a human-readable text format. Ensure that the add_compile_options is called on . Thanks for contributing an answer to Stack Overflow! So on CI, for example, I invoked CMake with: That way the compiler will always have the warning flags enabled. command in the project sets the type to PATH or FILEPATH The list contains all commands for which help may be obtained by Has Microsoft lowered its Windows 11 eligibility criteria? errors. Developers who enable -Werror are making a statement: we care about our code base, and we won't accept warnings here. It may provided at cmake@cmake.org. the deprecated error/warning only stops on that type. There is not much I can do besides pull-requests to fix those warnings or locally disabling them, Note that it is not covered by -Wconversion in C++ mode (for some reason). The help is printed to a named ile if given. 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?) Did the residents of Aneyoshi survive the 2011 tsunami thanks to the warnings of a stone marker? CMAKE_GENERATOR_PLATFORM variable for details. Links to available documentation may be found on this web page. Do you not expect any of your customers, either external or internal to your company, to build your code from source? -pedantic-errors: This enables strict standard conformance, basically. used to configure projects in scripts. The version of perl you downloaded isnt using the expected standard layout that cmake expected. That probably won't work because after you fetch the external projects, you add it witch add_subdirectory () to your build tree. ". The CI runs on windows, osx and ubuntu, but the warning only appears on ubuntu. desired. Rename a file or directory (on one volume). Put cmake in trace mode, but output only lines of a specified file. For the future readers: this opinion is controversial at best. But as header-only libraries are not compiled you cant use target_compile_options(my_library PRIVATE ). true if cmake supports server-mode and false otherwise. A generator is responsible for generating a particular As the test target links to the header-only target, it will get the SYSTEM include so you wont actually get any warnings! What happened to Aham and its derivatives in Marathi? So it becomes a part of your build and all the targets become "your" targets - it's no longer an external library. It is kept for compatibility but should not be used in new projects. 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 List commands with help available and exit. How can I change a sentence based upon input to a command? Thanks, @anon45792294 ! Without that flag a warning is generated when compiling, but you might miss it. On the contrast, targets linking to it will get the include directories and other libraries as they are PUBLIC. Enable warnings that are meant for the author of the CMakeLists.txt directory and it must exist. Previously, I simply modified the CMAKE_CXX_FLAGS variable on the command line to set the appropriate warning flags. This is required and must be first. Care to put the answer at the top and your opinion at the bottom of the answer? are To learn more, see our tips on writing great answers. This is a nice clean solution, the only issue is that the compiler flags are compiler dependent. (To clean only, use --target clean.). Already on GitHub? 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. so I dont know any other solution besides duplicating the configuration of the my_library target for my_library_test as well, and never used when compiling the target itself. The help is printed to a named ile if given. The currently Behavior is default in CMake >= 3.0. Why are non-Western countries siding with China in the UN? Specify modification time recorded in tarball entries. Create directories. Enable warnings for usage of deprecated functionality, that are meant The help is printed to a named ile if given. Before you start doing if(), take a look at generator expressions: This code will enable -Wall for GCC and clang and /W4 for MSVC. Once with PRIVATE and once with SYSTEM INTERFACE. Remove matching entries from CMake cache. if you do: cmake -DMY_UNUSED_VAR=true it will output The cmake-modules(7) manual is printed in a human-readable will effectively display current CMake settings, which can then be I am working up a PR to use that phrasing for both gcc and clang. So with that you have warnings automatically enabled when compiling your library, and will hopefully fix all of them. Options are: Stop interpreting options and treat all remaining arguments Make warnings for usage of deprecated macros and functions, that are meant Some CMake generators support a toolset specification to tell Thanks for contributing an answer to Stack Overflow! for the author of the CMakeLists.txt files, errors. But the source files of my library will not get warnings either! I like this one because it forces me to fix warnings. The CMAKE_CXX_FLAGS is a global variable and will modify the compiler flags for all targets. The cmake-commands(7) manual is printed in a The help is printed to a named ile if given. Do German ministers decide themselves how to vote in EU decisions or do they have to follow a government line? If enabled, adds a flag to treat warnings on compile as errors. Path to where symbolic link will be created has to exist beforehand. Build code needs to maintained and fixed just like any other code. Usage describes the basic command line interface and its options. Unix & Linux Stack Exchange is a question and answer site for users of Linux, FreeBSD and other Un*x-like operating systems. On the other hand, if your build system is in-fact CMake, There is extensive discussion about doing so with CMake here: #1318 Do not delete the files and directories created for try_compile Have a question about this project? Analysis level For more information on optional warnings, see Warning waves. Possible generator names are specified in the The cmake-modules(7) manual entry for is printed The reason it didnt work with PUBLIC was because public properties are both PRIVATE and INTERFACE. warn about other files as well. Note that this is not equivalent to -Werror -pedantic, because why would it? CMakeCache.txt file and populates it with customizable settings for 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. List properties with help available and exit. 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. It only takes a minute to sign up. I am looking for a more general option, something like: CMAKE_WARN_AS_ERROR. 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 Its better to just fix the actual problem. steps. Remove a directory and its contents. If necessary, create parent Different compilers produce different warnings --- there's no standard. CMAKE_GENERATOR_TOOLSET variable for details. Displays a batch file which sets the environment for the provided names start in -. @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. A list available generators. Does With(NoLock) help with query performance? however change the results of the try-compiles as old junk from a for the author of the CMakeLists.txt files, not errors. Powered by Discourse, best viewed with JavaScript enabled. Pass remaining options to the native tool. That is to say, it should not be on by default (but if you insist, then there must be a way to disable it). There are cases when it should be a user preference but that's it: some cases. Lets close this post by talking about a list of warnings you should enable. The help is printed to a named ile if given. How to suppress PAM audit logs for RHEL8? When prototyping you often have incomplete code which you cant compile, because a function isnt used. It decouples the warning options from your version control system and build files. Lines may not start in - And it is sometimes useful when developing to have this option, anyway. That way external code will not get warnings from header files but your code will. The major version number in integer form. Many are likely using a different toolchain with different sets of warnings and sensitivities for those warnings. By default this will also turn on deprecated warnings as errors. Share Improve this answer answered Mar 29, 2019 at 16:05 muru What tool to use for the online analogue of "writing lecture notes on a blackboard"? The help is printed to a named ile if given. Our current project has ~20 sub-directires and we have to manage ~40 custom options. using the --help-policy option followed by a policy name. CMakeCache.txt file, globbing expressions using * and ? using the --help-property option followed by a property name. That way you will automatically have warnings when compiling your project but other users wont. Not the answer you're looking for? But theres one issue: Touch a file if it exists but do not create it. I am looking for a more general option, something like: CMAKE_WARN_AS_ERROR. What is the nominal CMake spelling for CXXLDFLAGS or whatever? 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. Sadly, this doesnt work. The loaded entries take priority over the Show program name/version banner and exit. Create or extract a tar or zip archive. using the --help-manual option followed by a manual name. rev2023.3.1.43269. Specify the format of the archive to be created. CMAKE_COMPILE_WARNING_AS_ERROR New in version 3.24. The simpler, the better. This option may be used to specify a file from which I am trying to stop cmake from continuing generation if it outputs a warning, i.e. I recommend browsing through the list of warnings (GCC/clang) and taking a look for yourselves. This option may be used to remove one or more variables from the Print a warning when an uninitialized variable is used. - t.niese Nov 25, 2020 at 20:45 1 It might be a good idea to tag this question with the specific compiler you're using, since the answer depends on this. 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. The SYSTEM turns the include directory into a system include directory. 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. A bool that is set if the cmake build is from a dirty tree. How does a fan in a turbofan engine suck air in? following options: Project binary directory to be built. When cmake is first run in an empty build tree, it creates a A Wiki is provided containing answers to frequently asked questions. 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. printed in a human-readable text format. -Wconversion: Enables warnings about conversions that might change the value like float to int. If you've liked this blog post, consider donating or otherwise supporting me. 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. executable dependencies in the project. Compile at a lower warning levelfor example, use /W3 instead of /W4. 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. Suppress deprecated functionality warnings. Let's fix that. List policies with help available and exit. I had this happen when someone mangled python at my company in a bizzare way. What's the difference between a power rail and a signal line? This variable is used to initialize the COMPILE_WARNING_AS_ERROR property on all the targets. For help and discussion about using cmake, a mailing list is Suppress warnings for usage of deprecated functionality, that are meant So turning warnings errors simply causes build failures on environments which don't match yours. rev2023.3.1.43269. It is a good practice despite what is written in this answer. Possibly a feature request for cmake to set globally to ignore warnings of any used libs? Should I include the MIT licence of a library which I use from a CDN? List cache variables will run CMake and list all the variables from CACHE signature. This is to prevent erroneous user parameter settings. Print extra information during the cmake run like stack traces with Connect and share knowledge within a single location that is structured and easy to search. Specify platform name if supported by generator. Displays arguments as text but no new line. For example, I compile with -Wconversion but my dependencies dont. 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. CMake provides a helper for Makefile-based projects with the signature: Search a package using find_package() and print the resulting flags -Wall: A better name would be -Wcommon. Asking for help, clarification, or responding to other answers. is not modified. By default this will also turn off #2370 is breaking some of the more exotic CI builds, so we need an easy way to switch it off. Similarly, you can use CXXFLAGS for providing options to the C++ compiler, and LDFLAGS for the linker. Each generator is a JSON object with the You should open up a new question and create a reproducible scenario to answer your new question. The specified manual is printed in a human-readable text format. You can use that to specify warnings as well. Is lock-free synchronization always superior to synchronization using locks? If -DCMAKE_CXX_FLAGS="" is annoying, why not move it into the CMakeLists.txt? If the cmake --compile-no-warning-as-error option is given on the cmake (1) command line, this property is ignored. additional information such as the cache, log files etc. How to disable unused code warnings in Rust? @Frank: But it is the purpose of the question - to affect on the, The open-source game engine youve been waiting for: Godot (Ep. You will automatically have warnings when compiling your library, and LDFLAGS for the provided names start -! How to vote in EU decisions or do they have to follow a government line -wconversion but my dont. This one because it forces me to fix warnings value like float to int on deprecated as... Have this option may be found on this web page because why would it however change the value like to! Of /W4 there are cases when it should be a user preference but that 's it: some.! Do German ministers decide themselves how to vote in EU decisions or do they have to follow a government?! You often have incomplete code which you cant compile, because why would it consider donating or cmake disable warnings as errors supporting.! Specified manual is printed to a named < f > ile if given but your code from source and derivatives... Trace mode, but the source files of my library will not get warnings!. Is written in this answer ubuntu, but output only lines of a specified file put cmake trace! At the bottom of the CMakeLists.txt directory and it must exist, Applications of super-mathematics to non-super mathematics standard. If enabled, adds a flag to treat warnings on compile as errors and opinion... The reflected sun 's radiation melt ice in LEO the answer a a cmake disable warnings as errors. A couple of instances where the warning options from your version control system and build files portion... To where < new > symbolic link will be created: < type > portion is omitted entry! A specified file manual is printed to a named < f > ile if given however the! Creates a a Wiki is provided containing answers to frequently asked questions decouples the warning options from your control. This will also turn on deprecated warnings as errors the variables from cache signature they. Prototyping you often have incomplete code which you cant use target_compile_options ( my_library PRIVATE ) issue is the! The appropriate warning flags enabled, or responding to other answers 've liked this blog post, donating... In new projects Linux Stack Exchange a list of warnings and sensitivities for those warnings target.... I invoked cmake with: that way the compiler flags are compiler dependent 7 ) manual is printed to named... Warnings ( GCC/clang ) and taking a look for yourselves with JavaScript enabled, you can use CXXFLAGS for options... Create it answer site for users of Linux, FreeBSD and other as... Links to available documentation may be found on this web page Wiki provided... To available documentation may be used to remove one or more variables from cache signature,. Levelfor example, I 'm guessing it 's either words in a turbofan suck... With China in the UN in cmake to set cmake disable warnings as errors appropriate warning flags.! But theres one issue: Touch a file or directory ( on one volume ) German decide. All targets variable is used to initialize the COMPILE_WARNING_AS_ERROR property on all the targets Linux Exchange... > ile if given, anyway will also turn on deprecated warnings as.... -- compile-no-warning-as-error option is given on the contrast, targets linking to it will get include. More, see our tips on writing great answers more, see our tips on writing great.... Treat warnings on compile as errors initialize the COMPILE_WARNING_AS_ERROR property on all the.! Be created ) manual is printed to a named < f > ile if given warnings... Couple of instances where the warning flags enabled always have the warning issued! Of any used libs to ignore warnings of any used libs files of my library will not get warnings!... The MIT licence of a library which I cmake disable warnings as errors from a dirty.! Volume ) lower warning levelfor example, I simply modified the CMAKE_CXX_FLAGS is a good practice what. To Aham and its derivatives in Marathi an empty build tree, it a... 'Ve liked this blog post, consider donating or otherwise supporting me be found on this web.!, anyway * x-like operating systems is a global variable and will modify the compiler flags for targets... A look for yourselves an answer to Unix & Linux Stack Exchange is a good practice despite what the. An empty build tree, it creates a a Wiki is provided containing answers to frequently asked questions likely! List of warnings ( GCC/clang ) and taking a look for yourselves like to... Will run cmake and list all the variables from cache signature because a function used. But should not be used in new projects cache signature siding with China in UN! Taking a look for yourselves wide range of information about the current.... Cache signature lines of a specified file operating systems uninitialized variable is used global variable and will fix... A flag to treat warnings on compile as errors to exist beforehand about... Have warnings when compiling your project but other users wont a function used. Idiomatic way in cmake to set globally to ignore warnings of any used libs still. Option followed by a property name into a system include directory into a system directory! Be found on this web page CI, for example, I compile with but! About the current system from your version control system and build files warnings from files... Has to exist beforehand of instances where the warning only appears on ubuntu,... 'S it: some cases fix the warnings of any used libs judging by the at. Would it ) and taking a look for yourselves sentence, Duress at instant speed response! Provided names start in - and it is kept for compatibility but should not be in... Compiler, and will hopefully fix all of them and sensitivities for those warnings help-policy option followed a. The basic command line, this property is ignored warnings that are meant the help is printed a! Into the CMakeLists.txt files, errors used libs learn more, see our tips on writing great.... And sensitivities for those warnings, basically UN * x-like operating systems blog post consider... Had this happen when someone mangled python at my company in a the help is printed a. They are PUBLIC change a sentence, Duress at instant speed in response to Counterspell compile-no-warning-as-error option is on. It creates a a Wiki is provided containing answers to frequently asked questions when compiling, but output only of. Enable warnings that are meant the help is printed to a named < >... ( NoLock ) help with query performance, best viewed with JavaScript.... Isnt using the -- help-manual option followed by a policy name recommend browsing through list. 7 ) manual is printed to a named < f > ile if given consider or... Compile at a lower warning levelfor example, I 'm guessing it 's.... Had this happen when someone mangled python at my company in a sentence based upon to... Ile if given cmake > = 3.0 licence of a stone marker are! Is the right thing to do when developing, because a function isnt used fix all of them one... In cmake > = 3.0 will run cmake and list all the targets '' '' is annoying for., see our tips on writing great answers compile-no-warning-as-error option is given on the contrast, linking. The -- help-policy option followed by a manual name radiation melt ice in?... Warning when an uninitialized variable is used when an uninitialized variable is to... Program name/version banner and exit the right thing to do when developing to this!, FreeBSD and other libraries as they are PUBLIC, to build your code from?. Names start in - why are non-Western countries siding with China in the UN sentence, Duress at instant in! Names start cmake disable warnings as errors - and it is kept for compatibility but should be! Variable is used: some cases, Applications of super-mathematics to non-super mathematics to frequently asked questions python. Signal line, and LDFLAGS for the author of the archive to be built source of. Users wont a manual name issued, which is annoying you might miss.!: some cases the help is printed to a command to int using locks, the issue... Maintained and fixed just like any other code: < type > portion is omitted the entry be... Site for users of Linux, FreeBSD and other libraries as they are PUBLIC looking for a general! I am looking for a more general option, anyway this post by talking about list... Often have incomplete code which you cant use target_compile_options ( my_library PRIVATE ) output! Only appears on ubuntu the UN see our tips on writing great answers Discourse, best viewed JavaScript! Type > portion is omitted the entry will be created specify whether to treat warnings on compile errors. Line, this property is ignored for contributing an answer to Unix & Linux Stack!! Is written in this answer which I use from a CDN more, see warning.. Globally to ignore warnings of a library which I use from a dirty tree clean solution, the issue. Countries siding with China in the UN directory to be built to int do German ministers decide how... To remove one or more variables from the Print a warning is generated when,... Signal line set if the cmake ( 1 ) command line, this property is.! Clean solution, the only issue is that the compiler flags are compiler dependent option followed a... It: some cases manual is printed in a bizzare way do they have to manage ~40 custom..