cmake disable warnings as errors

-B build -Wno-dev anon45792294 January 1, 2021, 7:59pm 3 However, when it comes to just silencing warnings. The currently implemented compiler IDs are: GNU Clang AppleClang Fujitsu FujitsuClang IBMClang Intel It is silently ignored if there is no implementation for the compiler being used. What's the difference between a power rail and a signal line? The text was updated successfully, but these errors were encountered: Successfully merging a pull request may close this issue. but use PRIVATE to prevent them from enabling warnings in projects linking to your target. Path to where symbolic link will be created has to exist beforehand. Created using. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. warn about other files as well. The help is printed to a named ile if given. Sometimes you pass an unused variable to cmake and that would output a warning which i like to prevent. Its better to just fix the actual problem. Suspicious referee report, are "suggested citations" from a paper mill? There are at least four different cmake variables for linker flags and they are not all passed down through the superbuild or to Makefile pods. How does a fan in a turbofan engine suck air in? time, and only when debugging. The currently It only takes a minute to sign up. I am trying to stop cmake from continuing generation if it outputs a warning, i.e. if you do: cmake -DMY_UNUSED_VAR=true it will output Possible generator names are specified in the Behavior is default in CMake >= 3.0. The interface properties are only given to external targets linking to your target, Build instead of default targets. to stdout. How can I change a sentence based upon input to a command? treat all warnings as errors and stop. The help is printed to a named ile if given. Creating Xcode project from Cmake contains unwanted compiler flags, cmake cannot find libraries installed with vcpkg, VSCode + cmake + windows 10 -> cmake not in path. Connect and share knowledge within a single location that is structured and easy to search. Making statements based on opinion; back them up with references or personal experience. Thanks for contributing an answer to Stack Overflow! To fix this error, you must eliminate every warning in your project. on the cmake(1) command line, this property is ignored. Launching the CI/CD and R Collectives and community editing features for Overriding a default option() value in CMake from a parent CMakeLists.txt. Copy directories to directory. Using CMake, how do I get verbose output from CTest? if you do: CMake Warning: Manually-specified variables were not used by the project: MY_UNUSED_VAR. You signed in with another tab or window. If any of the listed files already do not 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. Already on GitHub? Like --trace, but with variables expanded. 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. It is a good practice despite what is written in this answer. If you know anything, please let me know. The option may be repeated for as many cache entries as Have a CMAKE option to disable warnings as errors, Large build overhaul, restructuring into "superbuild. The cmake-properties(7) manual is printed in a Because an error occurred, no object or executable file was generated. This property is not implemented for all compilers. Save the file and rebuild the application: make clean all. Why does my Makefile not compile and how can I fix it? This mode is not well-supported due to some technical limitations. When will the moons and the planet all be on one straight line again? 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. An interface library can only have INTERFACE targets. 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. Copyright 2000-2017 Kitware, Inc. and Contributors. Make deprecated macro and function warnings errors. While the above method works greater for most libraries, it doesnt work with header-only libraries. cmake -S . Created using. The following cmake -E commands are available only on Windows: Displays a batch file which sets the environment for the provided Check if is same as . If necessary, create parent Make warnings that are meant for the author of the CMakeLists.txt files The help is printed to a named ile if given. rev2023.3.1.43269. 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. projects (via share/aclocal/cmake.m4). The only thing I dont quite like in my setup are the warnings about unused functions/variables/etc. Also it makes it impossible to miss a warning. Making statements based on opinion; back them up with references or personal experience. It is kept for compatibility but should not be used in new projects. The help is printed to a named ile if given. CMAKE_COMPILE_WARNING_AS_ERROR if it is set when a target is Show program name/version banner and exit. But what if you are used by another project that has more warnings? To learn more, see our tips on writing great answers. Print a warning when an uninitialized variable is used. rev2023.3.1.43269. their build process with platform-independent CMake listfiles included This would turn off more warnings than necessary. I think this is problematic, because your code is designed with a certain warning level in mind. specified by the set() command documentation for its How can I configure CMake to treat compiler warnings as errors during the build? So the header files have a couple of instances where the warning is issued, which is annoying. Not the answer you're looking for? @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. Economy picking exercise that uses two consecutive upstrokes on the same string. To get information about an error or warning, you can look up the error code in the Help Index. done before the -P argument. using the --help-policy option followed by a policy name. may be specified on the command line with the -D option. Otherwise its a painful guessing game. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. The list contains all variables for which help may be obtained by Make warnings for usage of deprecated macros and functions, that are meant changed with -D option. CMake provides a helper for Makefile-based projects with the signature: Search a package using find_package() and print the resulting flags I would like to make that warning an error, any any other CMake Warning. Warnings are diagnostic messages that report constructions that are not inherently erroneous but that are risky or suggest there may have been an error. Easiest way to remove 3/16" drive rivets from a lower screen door hinge? With target_compile_options() you can also specify compiler flags for your target. I recommend browsing through the list of warnings (GCC/clang) and taking a look for yourselves. may sign up on the CMake web page. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. A generator is responsible for generating a particular supported. Create MD5 checksum of files in md5sum compatible format: Remove the file(s). Similarly, you can use CXXFLAGS for providing options to the C++ compiler, and LDFLAGS for the linker. By default this will also turn on deprecated warnings as errors. When and how was it discovered that Jupiter and Saturn are made out of gas? The -f option changes the behavior to return a The list contains all properties for which help may be obtained by The cmake-properties(7) manual entries for are Use a warning pragma to disable or suppress a specific warning. Different compilers produce different warnings --- there's no standard. directory and it must exist. Thank you! -Wconversion: Enables warnings about conversions that might change the value like float to int. fail incorrectly. The following resources are available to get help using CMake: The primary starting point for learning about CMake. using the --help-property option followed by a property name. Which basecaller for nanopore is the best to produce event tables with information about the block size/move table? not exist it will be silently ignored. Run cmake --build with no options for quick help. The help is printed to a named ile if given. What is CMake equivalent of 'configure --prefix=DIR && make all install '? Or it may be related to the cmake version on Ubuntu (3.17). Thanks for contributing an answer to Unix & Linux Stack Exchange! Is lock-free synchronization always superior to synchronization using locks? Find centralized, trusted content and collaborate around the technologies you use most. If you've liked this blog post, consider donating or otherwise supporting me. Toolset specification for the generator, if supported. Is variance swap long volatility of volatility? Why was the nose gear of Concorde located so far aft? Well occasionally send you account related emails. are What tool to use for the online analogue of "writing lecture notes on a blackboard"? Change the current working directory and run a command. @AlexReinking That depends on the project. Warnings are important, especially in C++. As final solutions, I think we should do one of two approaches: Create a CMake function called for all our targets. Dont find variables that are declared on the command line, but not display also advanced variables. Ensure that the add_compile_options is called on . If variables are defined using -D, this must be There compilation failed due to warnings, which was annoying. No configure or generate step is performed and the cache Specify modification time recorded in tarball entries. You can disable the warning like this when you are configuring your build. The list is member-post-only but one As the test target links to the header-only target, it will get the SYSTEM include so you wont actually get any warnings! #2370 is breaking some of the more exotic CI builds, so we need an easy way to switch it off. Normally, unused and uninitialized variables are searched for only May only be specified once. Blank lines are ignored. By default this will also turn off 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. If a directory does Print a trace of all calls made and from where. Have a question about this project? 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. 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? Is something's right to be free more important than the best interest for its own species according to deontology? The MSan builds, in particular. Note that it is not covered by -Wconversion in C++ mode (for some reason). Compilers will not issue warnings from header files originating from there. How to increase the number of CPUs in my computer? platforms. How to increase the number of CPUs in my computer? Powered by Discourse, best viewed with JavaScript enabled. 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. What is CMake equivalent of 'configure --prefix=DIR && make all install '? Displays arguments as text but no new line. then returns 0, if not it returns 1. Are there conventions to indicate a new item in a list? When cmake is first run in an empty build tree, it creates a By default this will also turn off deprecated warnings as errors. however change the results of the try-compiles as old junk from a The help is printed to a named ile if given. Theoretically Correct vs Practical Notation. following options: Project binary directory to be built. So you might try something like this: You will privately add the include/ without SYSTEM, but publicly with. Read file names from the given file, one per line. What happened to Aham and its derivatives in Marathi? Proposals to Fix the Spaceship Operator . The trick is to use target_include_directories(my_library SYSTEM PUBLIC include/). and never used when compiling the target itself. It enables common warnings like use of uninitialized variables. desired. using the --help-manual option followed by a manual name. 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 The version of perl you downloaded isnt using the expected standard layout that cmake expected. That way external code will not get warnings from header files but your code will. Thanks, @anon45792294 ! 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?) Targets linking to it will not get the warnings enabled. The cmake-commands(7) manual is printed in a For help and discussion about using cmake, a mailing list is Isn't the msan issue that the -lc++abi is added to CXXFLAGS and not linktime-only flags? from the top of a binary tree for a CMake project it will dump The warnings are used to compile everything with warnings enabled. true if the generator supports platforms and false otherwise. This can be configured in CMake version 3.24 and higher via the COMPILE_WARNING_AS_ERROR target property. Judging by the answer you posted, I'm guessing it's either. -Wall: A better name would be -Wcommon. This property is not implemented for all compilers. 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. In a scenario where you ship me a library in source and I intend to build it on a compiler that you never tested. List variables with help available and exit. So with my latest project, foonathan/lex, I looked for a better solution. 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. 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. -Wextra: Some more common warnings not enabled by -Wall. Wildcards are not supported. calls. How does a fan in a turbofan engine suck air in? Whatever the case is. I can't quite tell if the clang linker complaint is part of -Wall or something else. I am happy to simply suppress with -Wno-dev, Powered by Discourse, best viewed with JavaScript enabled. Too much of your opinion and too little of the actual answer. Specify whether to treat warnings on compile as errors. The list contains all manuals for which help may be obtained by this issue happens on my CI. for the author of the CMakeLists.txt files, not errors. Looking for a 'cmake clean' command to clear up CMake output, All warnings as errors with the Eclipse Java compiler (3.6.2). @ixSci - flagged for CoC. 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. Copyright 2000-2023 Kitware, Inc. and Contributors. Asking for help, clarification, or responding to other answers. human-readable text format. It took me a lot longer than it should have to find this simple answer. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. What you can do instead is create a non-interface target that has to be compiled, just for the purposes of checking warnings. as file names even if they start in -. CMAKE_GENERATOR_TOOLSET variable for details. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Compile at a lower warning levelfor example, use /W3 instead of /W4. CMakeLists.txt files. The CI runs on windows, osx and ubuntu, but the warning only appears on ubuntu. @Frank: But it is the purpose of the question - to affect on the, The open-source game engine youve been waiting for: Godot (Ep. The help is printed to a named ile if given. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Displays a batch file which sets the environment for the provided I have exactly the same needs as @chrilleman . names start in -. The cmake-variables(7) manual entry for is Developers who enable -Werror are making a statement: we care about our code base, and we won't accept warnings here. This has happened for more than 3 time for our team. Enable warnings for usage of deprecated functionality, that are meant Dump a wide range of information about the current system. An error be is a syntax error that prevents compilation. They have an awkward set of linker flags to link to a specially built libc++. Have a question about this project? You should open up a new question and create a reproducible scenario to answer your new question. Just registered to this forum for this topic. then the will be converted to an absolute path. List properties with help available and exit. What is the idiomatic way in CMAKE to add the -fPIC compiler option? 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. This error only appears when the /WX flag is set and a warning occurs during compilation. The best answers are voted up and rise to the top, Not the answer you're looking for? I understand the motivation for enabling the -Werror flag: I also have a zero-warning policy, and I hate when developers ignore warnings. Does With(NoLock) help with query performance? The help is printed to a named ile if given. Previously, I simply modified the CMAKE_CXX_FLAGS variable on the command line to set the appropriate warning flags. However, when it comes to just silencing warnings. When cmake is first run in an empty build tree, it creates a For GCC/clang I usually have the following set of warnings: -Werror: Treat warnings as errors. Keys are: The full version string as displayed by cmake --version. 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. Remove a directory and its contents. 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. using the --help-command option followed by a command name. text format. But as header-only libraries are not compiled you cant use target_compile_options(my_library PRIVATE ). While we still have only a single place to list all the options. Project configuration settings @Karthik, muru gave you the command line: @muru, your comment sounds like the answer here; would you mind providing it as such? And it is sometimes useful when developing to have this option, anyway. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Without that flag a warning is generated when compiling, but you might miss it. Open up the CMakeLists.txt file and, underneath the section add_executable, add the following: target_compile_options(${PROJECT_NAME} PRIVATE. Tip: Use generator expressions to conditionally enable different warnings for different compilers. Find centralized, trusted content and collaborate around the technologies you use most. The help is printed to a named ile if given. human-readable text format. That probably won't work because after you fetch the external projects, you add it witch add_subdirectory () to your build tree. the list. That is to say, it should not be on by default (but if you insist, then there must be a way to disable it). Rename a file or directory (on one volume). So on CI, for example, I invoked CMake with: That way the compiler will always have the warning flags enabled. Tip: For header-only libraries enable warnings on the test target of the library. (To clean only, use --target clean.). The cmake-policies(7) manual is printed in a The given file should be a CMake script Asking for help, clarification, or responding to other answers. This is required and must be first. The loaded entries take priority over the A list of strings with all the extra generators compatible with CMakeCache.txt file and populates it with customizable settings for How can I silence the warning if this is happening inside the cmake find_package code for PerlLibs ? Use with care, you can make your CMakeCache.txt non-working. The following cmake -E commands are available only on UNIX: Create a symbolic link naming . How do you prevent your header files from leaking warnings into other projects? message(send_error ) calls. So with that you have warnings automatically enabled when compiling your library, and will hopefully fix all of them. Suppress warnings that are meant for the author of the I like this one because it forces me to fix warnings. It would use target_compile_options to add those flags. It turns out the answer was to simply add the line. Create