and produces tonnes of warnings with MSVC: How to react to a students panic attack in an oral exam? Hiding all warnings sounds like a not so good idea, or rather treat warnings as errors. Should I include the MIT licence of a library which I use from a CDN? printed in a human-readable text format. After thinking about it some more, I think I see your point now. Projects specify for the author of the CMakeLists.txt files, errors. 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. Making statements based on opinion; back them up with references or personal experience. To learn more, see our tips on writing great answers. So with that you have warnings automatically enabled when compiling your library, and will hopefully fix all of them. The currently Already on GitHub? Usage describes the basic command line interface and its options. used. Do not actually run configure and generate changed with -D option. -pedantic-errors: This enables strict standard conformance, basically. Some CMake generators support a platform name to be given to the to your account. using the --help-module option followed by a module name. Or it may be related to the cmake version on Ubuntu (3.17). 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. This variable is used to initialize the COMPILE_WARNING_AS_ERROR property on all the targets. Have a question about this project? When including the header files in my source files, I want warnings. the deprecated error/warning only stops on that type. @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. The list contains all manuals for which help may be obtained by Use DisabledWarnings to disable certain warnings. Previous topic CMAKE_COMPILE_PDB_OUTPUT_DIRECTORY_<CONFIG> Next topic CMAKE_<CONFIG>_POSTFIX This Page Show Source Quick search Specify platform name if supported by generator. A warning is a potential runtime error and should never be ignored. Check if is same as . This When prototyping you often have incomplete code which you cant compile, because a function isnt used. rev2023.3.1.43269. on the cmake(1) command line, this property is ignored. But when including them from other source files, I dont want them. using the --help-policy option followed by a policy name. Build code needs to maintained and fixed just like any other code. Let's fix that. 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. What happened to Aham and its derivatives in Marathi? Don't use /WX to compile. How does a fan in a turbofan engine suck air in? using the --help-command option followed by a command name. The cmake-variables(7) manual entry for is List properties with help available and exit. for the author of the CMakeLists.txt files. the list. I occasionally forgot to do that, implemented a feature, pushed it to CI. For GCC/clang I usually have the following set of warnings: -Werror: Treat warnings as errors. How do you prevent your header files from leaking warnings into other projects? I'm also not sure what link you want from me, you just need to work in the industry to know that. But what if you are used by another project that has more warnings? How do I disable g++ displaying notes for errors? What is CMake equivalent of 'configure --prefix=DIR && make all install '? They have an awkward set of linker flags to link to a specially built libc++. The list contains all variables for which help may be obtained by When will the moons and the planet all be on one straight line again? Touch a file if it exists but do not create it. Find centralized, trusted content and collaborate around the technologies you use most. their build process with platform-independent CMake listfiles included Path to where symbolic link will be created has to exist beforehand. true if the generator supports platforms and false otherwise. If a directory already exists it will be To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. 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. Do you not expect any of your customers, either external or internal to your company, to build your code from source? Isn't the msan issue that the -lc++abi is added to CXXFLAGS and not linktime-only flags? The help is printed to a named ile if given. I am trying to stop cmake from continuing generation if it outputs a warning, i.e. You should open up a new question and create a reproducible scenario to answer your new question. Why did the Soviets not shoot down US spy satellites during the Cold War? CMake may support multiple native build systems on certain Tip: For header-only libraries enable warnings on the test target of the library. used to configure projects in scripts. done before the -P argument. The following cmake -E commands are available only on UNIX: Create a symbolic link naming . and never used when compiling the target itself. See the The help is printed to a named ile if given. Of course, there are more warnings not enabled by those ones. Find centralized, trusted content and collaborate around the technologies you use most. Without that flag a warning is generated when compiling, but you might miss it. This should also be reflected by the build files. To fix this error, you must eliminate every warning in your project. So it becomes a part of your build and all the targets become "your" targets - it's no longer an external library. How to increase the number of CPUs in my computer? List modules with help available and exit. Browse other questions tagged. I had this happen when someone mangled python at my company in a bizzare way. the CMake cache that are not marked as INTERNAL or ADVANCED. -Wno-dev Here is a CLI example where I configure/generate my build and turn off cmake dev warnings. Make developer warnings not errors. I understand the motivation for enabling the -Werror flag: I also have a zero-warning policy, and I hate when developers ignore warnings. this issue happens on my CI. true if cmake supports server-mode and false otherwise. Print extra information during the cmake run like stack traces with -Wconversion: Enables warnings about conversions that might change the value like float to int. Thanks. The help is printed to a named ile if given. then the will be converted to an absolute path. So an external project linking my_library will not get any warnings from the header files of my library. See the documentation for The help is printed to a named ile if given. 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. That is to say, it should not be on by default (but if you insist, then there must be a way to disable it). 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. Wildcards are not supported. desired. Generate a graphviz input file that will contain all the library and By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Do not delete the files and directories created for try_compile Copy files to (either file or directory) if This time the GCC compiler properly flags the problem with our code. errors. human-readable text format. So, it may be a configuration issue. Compile at a lower warning levelfor example, use /W3 instead of /W4. privacy statement. What is CMake equivalent of 'configure --prefix=DIR && make all install '? The SYSTEM turns the include directory into a system include directory. Asking for help, clarification, or responding to other answers. Sign in Do not delete the try_compile build tree. Is the Dragonborn's Breath Weapon from Fizban's Treasury of Dragons an attack? -Werror is a compiler flag that causes all compiler warnings to be treated as errors. But theres one issue: Note that this is not equivalent to -Werror -pedantic, because why would it? native build system to choose a compiler or SDK. CMAKE_COMPILE_WARNING_AS_ERROR New in version 3.24. Note that it is not covered by -Wconversion in C++ mode (for some reason). You can use that to specify warnings as well. Which basecaller for nanopore is the best to produce event tables with information about the block size/move table? @ixSci - flagged for CoC. Targets linking to it will not get the warnings enabled. in each directory of a source tree with the name CMakeLists.txt. Making statements based on opinion; back them up with references or personal experience. Proposals to Fix the Spaceship Operator . The warnings are used to compile everything with warnings enabled. There compilation failed due to warnings, which was annoying. Jordan's line about intimate parties in The Great Gatsby? A list available generators. following options: Project binary directory to be built. Open up the CMakeLists.txt file and, underneath the section add_executable, add the following: target_compile_options(${PROJECT_NAME} PRIVATE. 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. Toolset specification for the generator, if supported. Display the current environment variables. Lines may not start in - Find problems with variable usage in system files. Would the reflected sun's radiation melt ice in LEO? 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 May only be specified once. cmake listfiles. Has 90% of ice around Antarctica disappeared in less than a decade? as in example? 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. is logged. Keys are: The full version string as displayed by cmake --version. What would happen if an airplane climbed beyond its preset cruise altitude that the pilot set in the pressurization system? the project. Copy files to (either file or directory). What is the idiomatic way in CMAKE to add the -fPIC compiler option? @Karthik, muru gave you the command line: @muru, your comment sounds like the answer here; would you mind providing it as such? Remove a directory and its contents. This would turn off more warnings than necessary. Specify modification time recorded in tarball entries. The option may be executable dependencies in the project. If you've liked this blog post, consider donating or otherwise supporting me. If a file is specified, the version is written into it. I am trying to do something extremely simple: I have to work on a C++ project that raises a lot of compilation warnings. rev2023.3.1.43269. This option may be used to specify a file from which Enable deprecated functionality warnings. CMAKE_GENERATOR_PLATFORM variable for details. Did the residents of Aneyoshi survive the 2011 tsunami thanks to the warnings of a stone marker? Applications of super-mathematics to non-super mathematics. Make warnings for usage of deprecated macros and functions, that are meant By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. takes priority over the projects default value. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. It may be In a scenario where you ship me a library in source and I intend to build it on a compiler that you never tested. 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. The cmake-modules(7) manual is printed in a human-readable -D:= or -D=. so I dont know any other solution besides duplicating the configuration of the my_library target for my_library_test as well, If the cmake --compile-no-warning-as-error option is given on the cmake (1) command line, this property is ignored. Warnings are diagnostic messages that report constructions that are not inherently erroneous but that are risky or suggest there may have been an error. they have changed. No configure or generate step is performed and the cache installed libraries in plain Makefile-based projects or in autoconf-based The number of distinct words in a sentence, Duress at instant speed in response to Counterspell. Asking for help, clarification, or responding to other answers. Not sure where I need to put -Wno-dev. human-readable text format. Share Improve this answer answered Mar 29, 2019 at 16:05 muru By default this will also turn off deprecated warnings as errors.-Wdeprecated. human-readable text format. Process the given cmake file as a script written in the CMake rev2023.3.1.43269. Sadly, this doesnt work. Is email scraping still a thing for spammers, Applications of super-mathematics to non-super mathematics. Make warnings for usage of deprecated macros and functions, that are meant 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. may be specified on the command line with the -D option. Enable warnings that are meant for the author of the CMakeLists.txt The help is printed to a named ile if given. directory and it must exist. Linux is a registered trademark of Linus Torvalds. The CI runs on windows, osx and ubuntu, but the warning only appears on ubuntu. To fix, use one of the following techniques. Users build a project by using CMake to generate a build system for a Remove matching entries from CMake cache. This error only appears when the /WX flag is set and a warning occurs during compilation. The help is printed to a named ile if given. 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. Links to available documentation may be found on this web page. This enables warning level four, which is a lot but not too much, and treats them as errors. You have to use INTERFACE instead of PUBLIC. See the It took me a lot longer than it should have to find this simple answer. native tool on their platform. human-readable text format. Once with PRIVATE and once with SYSTEM INTERFACE. Thanks, @anon45792294 ! e.g. The help is printed to a named ile if given. documentation at https://cmake.org before posting questions to Many are likely using a different toolchain with different sets of warnings and sensitivities for those warnings. message(send_error ) calls. Later compilation doesnt touch that file again, so the warnings is not emitted again. Enable deprecated functionality warnings. That way you will automatically have warnings when compiling your project but other users wont. Build target clean first, then build. treat all warnings as errors and stop. The help is printed to a named ile if given. Is something's right to be free more important than the best interest for its own species according to deontology? The given file should be a CMake script 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 display also advanced variables. Guideline: Specify include directories for libraries twice. Run cmake --build with no options for quick help. Thanks for contributing an answer to Stack Overflow! Ackermann Function without Recursion or Stack. Unix & Linux Stack Exchange is a question and answer site for users of Linux, FreeBSD and other Un*x-like operating systems. The -f option changes the behavior to return a 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? language. A list of strings with all the extra generators compatible with Make deprecated macro and function warnings errors. If H is specified, it will also 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. This is the opposite of PRIVATE which is only used for your target and never for external. The help is printed to a named ile if given. The help is printed to a named ile if given. Suspicious referee report, are "suggested citations" from a paper mill? Create directories. Thanks for contributing an answer to Unix & Linux Stack Exchange! Developers who enable -Werror are making a statement: we care about our code base, and we won't accept warnings here. 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. Behavior is default in CMake >= 3.0. No global defaults. command in the project sets the type to PATH or FILEPATH steps. -Wsign-conversion: Enables warnings about conversions between signed and unsigned. however change the results of the try-compiles as old junk from a The list contains all commands for which help may be obtained by except for --add-file= to add files whose The best answers are voted up and rise to the top, Not the answer you're looking for? time, and only when debugging. files. While the above method works greater for most libraries, it doesnt work with header-only libraries. This option may be used to specify a setting that The list is member-post-only but one For multi-configuration tools, choose configuration . Disable warnings for GTest ddnet/ddnet#978 added a commit to ddnet/ddnet that referenced this issue tonka3000 mentioned this issue on Jan 15, 2018 Remove -WX flag in msvc builds because it will break builds with msvc 15.5 lasote/conan-gtest#37 coder0xff mentioned this issue on Jan 27, 2018 Some CMake generators support a toolset specification to tell 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. not exist it will be silently ignored. Please first read the full It's better to just fix the actual problem. Specify whether to treat warnings on compile as errors. Normally, unused and uninitialized variables are searched for only Speaking as someone who regularly uses top-of-tree compiler builds, where warnings break frequently, hard-coded warnings-as-errors is a blight. Using CMake, how do I get verbose output from CTest? But the source files of my library will not get warnings either! Print a warning when an uninitialized variable is used. 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. true if the generator supports toolsets and false otherwise. The following language-independent options do not enable specific warnings but control the kinds of diagnostics produced by GCC. If multiple files are specified, the must be If the : portion is given it must be one of the types The cmake executable is the CMake command-line interface. silently ignored. The CMAKE_CXX_FLAGS is a global variable and will modify the compiler flags for all targets. What's the difference between a power rail and a signal line? Copy directories to directory. Use with care, you can make your CMakeCache.txt non-working. With target_compile_options() you can also specify compiler flags for your target. Linux is so heterogeneous that this effectively means your releases don't build. Ignored. How to disable unused code warnings in Rust? Build instead of default targets. For help and discussion about using cmake, a mailing list is paxr (restricted pax, default), and zip. printed in a human-readable text format. Created using. Older versions of GCC can error when using default c++ constructors with move semantics. An interface library can only have INTERFACE targets. Otherwise its a painful guessing game. To learn more, see our tips on writing great answers. Why does my Makefile not compile and how can I fix it? So the header files have a couple of instances where the warning is issued, which is annoying. Just registered to this forum for this topic. The cmake-commands(7) manual entry for is Well occasionally send you account related emails. /WX tells the compiler to treat all warnings as errors. Connect and share knowledge within a single location that is structured and easy to search. You signed in with another tab or window. previous try-compile may cause a different test to either pass or projects (via share/aclocal/cmake.m4). Options are: Stop interpreting options and treat all remaining arguments Launching the CI/CD and R Collectives and community editing features for Overriding a default option() value in CMake from a parent CMakeLists.txt. The list contains all properties for which help may be obtained by -Werror is the right thing to do when developing, because you want developers to fix the warnings. For example, I compile with -Wconversion but my dependencies dont. build system. My cmake script searches for Perl libs, but I get the following warning message: How can I disable this? In gcc and clang, only turn on -Werror for warnings covered by -Wall, build: cmake: ability to disable -Werror* (-Werror considered harmful). Or your cmake code could just be wrong. The help is printed to a named ile if given. It is a good practice despite what is written in this answer. Enabling -Werror by default causes broken builds for your consumers and is a bad practice. Specify the format of the archive to be created. - 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. Looking for a 'cmake clean' command to clear up CMake output, All warnings as errors with the Eclipse Java compiler (3.6.2). 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. for the author of the CMakeLists.txt files. Change the current working directory and run a command. You signed in with another tab or window. Suppress warnings for usage of deprecated functionality, that are meant 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?) Does With(NoLock) help with query performance? It is a pods workaround for the superbuild. Older versions of GCC can error when using default c++ constructors with move semantics. Our current project has ~20 sub-directires and we have to manage ~40 custom options. Learn more about Stack Overflow the company, and our products. Silencing warnings permanently is just asking for problems down the road. I would like to make that warning an error, any any other CMake Warning. Available commands are: Report cmake capabilities in JSON format. The cmake-modules(7) manual entry for is printed Theoretically Correct vs Practical Notation. The help is printed to a named ile if given. Fix the problems that cause warnings in your project. 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. The following resources are available to get help using CMake: The primary starting point for learning about CMake. implemented compiler IDs are: This property is initialized by the value of the variable It only takes a minute to sign up. This is to prevent erroneous user parameter settings. 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. A generator is responsible for generating a particular The help is printed to a named ile if given. However, when it comes to just silencing warnings. Rename a file or directory (on one volume). if there is no implementation for the compiler being used. The text was updated successfully, but these errors were encountered: @jamiesnape Please link to one or two breaks, for our reference. (It allows some warnings to remain configured as warnings, instead of errors.) If a file does Use a warning pragma to disable or suppress a specific warning. Enable warnings for usage of deprecated functionality, that are meant 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. 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 CACHE signature. Many are likely using a different toolchain with different sets of warnings and sensitivities for those warnings. to load cache entries before the first pass through the projects The loaded entries take priority over the Like --trace, but with variables expanded. CMakeCache.txt file, globbing expressions using * and ? from the top of a binary tree for a CMake project it will dump The cmake-commands(7) manual is printed in a And as the warnings are specified as PRIVATE, they will only be used when compiling your library. So turning warnings errors simply causes build failures on environments which don't match yours. If you compile with an option such as -Werror to treat warnings as errors, this is a blocking issue. It enables common warnings like use of uninitialized variables. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. You can disable the warning like this when you are configuring your build. There is not much I can do besides pull-requests to fix those warnings or locally disabling them, If directory does not exist it will be created. The warnings are used to compile everything with warnings enabled. This is required and must be first. Somewhat annoying, but still useful. How can I silence the warning if this is happening inside the cmake find_package code for PerlLibs ? It is silently ignored if there is no implementation for the compiler being used. Compile at a lower warning levelfor example, use /W3 instead of /W4. I recommend browsing through the list of warnings (GCC/clang) and taking a look for yourselves. I am looking for a more general option, something like: CMAKE_WARN_AS_ERROR. in CMAKE_SOURCE_DIR and CMAKE_BINARY_DIR. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. How can I recognize one? What is the nominal CMake spelling for CXXLDFLAGS or whatever? It turns out the answer was to simply add the line. Each generator is a JSON object with the Judging by the answer you posted, I'm guessing it's either. Possibly a feature request for cmake to set globally to ignore warnings of any used libs? It is silently ignored To fix this error, you must eliminate every warning in your project. How to react to a students panic attack in an oral exam? This is problematic when you use add_subdirectory() to compile some external dependencies which do not compile without warnings. This is useful in debugging failed try_compiles. privacy statement. Windows CE SDK installed in VS2008. Similarly, you can use CXXFLAGS for providing options to the C++ compiler, and LDFLAGS for the linker.