true if the generator supports platforms and false otherwise. If you know anything, please let me know. So an external project linking my_library will not get any warnings from the header files of my library. But they did prevent a couple of bugs, so Ill keep them enabled. Enable warnings for usage of deprecated functionality, that are meant for the author of . Enable warnings that are meant for the author of the CMakeLists.txt Connect and share knowledge within a single location that is structured and easy to search. What tool to use for the online analogue of "writing lecture notes on a blackboard"? What's the difference between a power rail and a signal line? Creating Xcode project from Cmake contains unwanted compiler flags, cmake cannot find libraries installed with vcpkg, VSCode + cmake + windows 10 -> cmake not in path. Already on GitHub? Find centralized, trusted content and collaborate around the technologies you use most. Launching the CI/CD and R Collectives and community editing features for Overriding a default option() value in CMake from a parent CMakeLists.txt. using the --help-manual option followed by a manual name. When cmake is first run in an empty build tree, it creates a The following resources are available to get help using CMake: The primary starting point for learning about CMake. The following cmake -E commands are available only on Windows: Displays a batch file which sets the environment for the provided Why are non-Western countries siding with China in the UN? What is CMake equivalent of 'configure --prefix=DIR && make all install '? Do not actually run configure and generate While we still have only a single place to list all the options. Previous topic CMAKE_COMPILE_PDB_OUTPUT_DIRECTORY_<CONFIG> Next topic CMAKE_<CONFIG>_POSTFIX This Page Show Source Quick search Can you just provide answer on how to ignore all warnings instead of giving advices nobody is looking for? The trick is to use target_include_directories(my_library SYSTEM PUBLIC include/). Run cmake --build with no options for quick help. treat all warnings as errors and stop. created. then the will be converted to an absolute path. If the : portion is given it must be one of the types errors. Powered by Discourse, best viewed with JavaScript enabled. Connect and share knowledge within a single location that is structured and easy to search. You can use that to specify warnings as well. 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. Make warnings that are meant for the author of the CMakeLists.txt files projects (via share/aclocal/cmake.m4). Making statements based on opinion; back them up with references or personal experience. Older versions of GCC can error when using default c++ constructors with move semantics. -fsyntax-only Rename a file or directory (on one volume). human-readable text format. Its better to just fix the actual problem. This option may be used to specify a setting that -Wextra: Some more common warnings not enabled by -Wall. Specify whether to treat warnings on compile as errors. native tool on their platform. Has 90% of ice around Antarctica disappeared in less than a decade? Why was the nose gear of Concorde located so far aft? warning treated as error - no object file generated. Has Microsoft lowered its Windows 11 eligibility criteria? Do not delete the files and directories created for try_compile The reason it didnt work with PUBLIC was because public properties are both PRIVATE and INTERFACE. The option may be repeated for as many cache entries as may sign up on the CMake web page. List commands with help available and exit. By default this will also turn off deprecated warnings as errors. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Windows CE SDK installed in VS2008. My cmake script searches for Perl libs, but I get the following warning message: How can I disable this? Thanks for contributing an answer to Stack Overflow! Copy files to (either file or directory). By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Has Microsoft lowered its Windows 11 eligibility criteria? The help is printed to a named ile if given. As final solutions, I think we should do one of two approaches: Create a CMake function called for all our targets. This time the GCC compiler properly flags the problem with our code. What's the difference between a power rail and a signal line? Note that it is not covered by -Wconversion in C++ mode (for some reason). CMakeLists.txt files. I have exactly the same needs as @chrilleman . Ackermann Function without Recursion or Stack. 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. Fix the problems that cause warnings in your project. CMakeGraphVizOptions.cmake for more details. This is problematic when you use add_subdirectory () to compile some external dependencies which do not compile without warnings. desired. The help is printed to a named ile if given. except for --add-file= to add files whose If the : portion is omitted the entry will be created It turns out the answer was to simply add the line. -Werror is a compiler flag that causes all compiler warnings to be treated as errors. Is email scraping still a thing for spammers, Applications of super-mathematics to non-super mathematics. 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. Each generator is a JSON object with the The cmake-commands(7) manual entry for is Compile at a lower warning levelfor example, use /W3 instead of /W4. No global defaults. Treating warnings as errors is a good practice for CI systems with a fixed and predictable toolchain, but it is inappropriate to force on all users. The list contains all variables for which help may be obtained by they have changed. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Different compilers produce different warnings --- there's no standard. This way only our own targets get them. Put cmake in trace mode, but output only lines of a specified file. #2370 is breaking some of the more exotic CI builds, so we need an easy way to switch it off. Dont find variables that are declared on the command line, but not A bool that is set if the cmake build is from a dirty tree. Or your cmake code could just be wrong. 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. The help is printed to a named ile if given. the project. This has been a recommended practice for at least a, Gentoo is just one project. How to increase the number of CPUs in my computer? -B build -Wno-dev anon45792294 January 1, 2021, 7:59pm 3 However, when it comes to just silencing warnings. Make warnings for usage of deprecated macros and functions, that are meant How to react to a students panic attack in an oral exam? When creating a library you specify include directories and link to other libraries. CMake is a cross-platform build system generator. errors. Behavior is default in CMake >= 3.0. So the header files have a couple of instances where the warning is issued, which is annoying. List variables with help available and exit. CACHE signature. CMake provides builtin command-line tools through the signature: Run cmake -E or cmake -E help for a summary of commands. and never used when compiling the target itself. not exist it will be silently ignored. The list contains all commands for which help may be obtained by How to increase the number of CPUs in my computer? If the cmake --compile-no-warning-as-error option is given 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 It could be user error: You could be using find_package incorrectly. Make developer warnings not errors. Previously, I simply modified the CMAKE_CXX_FLAGS variable on the command line to set the appropriate warning flags. Keys are: The full version string as displayed by cmake --version. installed libraries in plain Makefile-based projects or in autoconf-based Why did the Soviets not shoot down US spy satellites during the Cold War? if you do: cmake -DMY_UNUSED_VAR=true it will output Specify platform name if supported by generator. Generate graphviz of dependencies, see CMakeGraphVizOptions.cmake for more. Available commands are: Report cmake capabilities in JSON format. The help is printed to a named ile if given. Lines may not start in - Ensure that the add_compile_options is called on . Supported formats are: 7zip, gnutar, pax, from the top of a binary tree for a CMake project it will dump The cmake-commands(7) manual is printed in a What is the nominal CMake spelling for CXXLDFLAGS or whatever? Do EMC test houses typically accept copper foil in EUT? It enables common warnings like use of uninitialized variables. -Wall: A better name would be -Wcommon. This can be used to use cmake instead of pkg-config to find The help is printed to a named ile if given. Notably, this exact issue was the source of one major debacle in the last year in the Linux kernel: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b339ec9c229aaf399296a120d7be0e34fbc355ca, It is also prohibited by the Gentoo packaging archives (important because it is a source-based distribution): https://devmanual.gentoo.org/ebuild-writing/common-mistakes/index.html. Compilers will not issue warnings from header files originating from there. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. The warnings are used to compile everything with warnings enabled. Not sure where I need to put -Wno-dev. Check if is same as . for the author of the CMakeLists.txt files, not errors. paxr (restricted pax, default), and zip. 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. 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. rev2023.3.1.43269. success) in such situations instead. You can simply pass it at the command line when you want to toggle it on or off. To fix this error, you must eliminate every warning in your project. List cache variables will run CMake and list all the variables from the list. PTIJ Should we be afraid of Artificial Intelligence? -Wno-error=dev. To get information about an error or warning, you can look up the error code in the Help Index. directory and it must exist. Pass remaining options to the native tool. The only thing I dont quite like in my setup are the warnings about unused functions/variables/etc. Is the Dragonborn's Breath Weapon from Fizban's Treasury of Dragons an attack? It is silently ignored The cmake-modules(7) manual is printed in a human-readable repeated for as many cache entries as desired. That probably won't work because after you fetch the external projects, you add it witch add_subdirectory () to your build tree. Usage describes the basic command line interface and its options. executable dependencies in the project. human-readable text format. warn about other files as well. calls. Possible generator names are specified in the UNIX is a registered trademark of The Open Group. the CMake cache that are not marked as INTERNAL or ADVANCED. Let's fix that. Remove a directory and its contents. This option may be used to remove one or more variables from the By clicking Sign up for GitHub, you agree to our terms of service and @AlexReinking That depends on the project. The given file should be a CMake script A warning is a potential runtime error and should never be ignored. But when including them from other source files, I dont want them. Easiest way to remove 3/16" drive rivets from a lower screen door hinge? Print extra information during the cmake run like stack traces with After thinking about it some more, I think I see your point now. The help is printed to a named ile if given. The simpler, the better. true if cmake supports server-mode and false otherwise. This option is best used for one try-compile at a You can disable the warning like this when you are configuring your build. Suppress deprecated functionality warnings. This can be configured in CMake version 3.24 and higher via the COMPILE_WARNING_AS_ERROR target property. How does a fan in a turbofan engine suck air in? Sometimes you pass an unused variable to cmake and that would output a warning which i like to prevent. 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. To fix, use one of the following techniques. Windows CE SDK installed in VS2005. For help and discussion about using cmake, a mailing list is CMake provides a command-line signature to build an already-generated See the Print a trace of all calls made and from where. What happened to Aham and its derivatives in Marathi? Using CMake, how do I get verbose output from CTest? Created using. The currently implemented compiler IDs are: GNU Clang AppleClang Fujitsu FujitsuClang IBMClang Intel 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. used. So with my latest project, foonathan/lex, I looked for a better solution. But the source files of my library will not get warnings either! text format. Without that flag a warning is generated when compiling, but you might miss it. How can I configure CMake to treat compiler warnings as errors during the build? (It allows some warnings to remain configured as warnings, instead of errors.) A list available generators. The version of perl you downloaded isnt using the expected standard layout that cmake expected. C++ compilers are forced to accept a lot of stupid code, like functions without return, use of uninitialized warnings, etc. The above warnings will work on GCC and clang, but not MSVC. An interface library can only have INTERFACE targets. using the --help-variable option followed by a variable name. Normally, unused and uninitialized variables are searched for only as in example? privacy statement. Build target clean first, then build. The help is printed to a named ile if given. @Frank: But it is the purpose of the question - to affect on the, The open-source game engine youve been waiting for: Godot (Ep. When cmake is first run in an empty build tree, it creates a Open up the CMakeLists.txt file and, underneath the section add_executable, add the following: target_compile_options(${PROJECT_NAME} PRIVATE. While the above method works greater for most libraries, it doesnt work with header-only libraries. Copy directories to directory. Thank you! Touch a file if it exists but do not create it. Have a question about this project? How to suppress PAM audit logs for RHEL8? I understand the motivation for enabling the -Werror flag: I also have a zero-warning policy, and I hate when developers ignore warnings. for the author of the CMakeLists.txt files. -D:= or -D=. Similarly, you can use CXXFLAGS for providing options to the C++ compiler, and LDFLAGS for the linker. The warnings are used to compile everything with warnings enabled. containing SET commands that use the CACHE option, not a Do German ministers decide themselves how to vote in EU decisions or do they have to follow a government line? If files are the same, How do you prevent your header files from leaking warnings into other projects? deprecation warnings. names start in -. @Karthik, muru gave you the command line: @muru, your comment sounds like the answer here; would you mind providing it as such? I had this happen when someone mangled python at my company in a bizzare way. Making statements based on opinion; back them up with references or personal experience. See the documentation for The cmake-variables(7) manual is printed in a (To clean only, use --target clean.). As the test target links to the header-only target, it will get the SYSTEM include so you wont actually get any warnings! on the cmake(1) command line, this property is ignored. Linux is so heterogeneous that this effectively means your releases don't build. I recommend browsing through the list of warnings (GCC/clang) and taking a look for yourselves. Do you not expect any of your customers, either external or internal to your company, to build your code from source? Projects specify human-readable text format. using the --help-command option followed by a command name. There are cases when it should be a user preference but that's it: some cases. If a file does The MSan builds, in particular. Blank lines are ignored. More info about Internet Explorer and Microsoft Edge. The best answers are voted up and rise to the top, Not the answer you're looking for? But theres one issue: What do I need to add to my CMakeLists.txt to make that happen? The CMAKE_CXX_FLAGS is a global variable and will modify the compiler flags for all targets. The list contains all modules for which help may be obtained by Asking for help, clarification, or responding to other answers. What you can do instead is create a non-interface target that has to be compiled, just for the purposes of checking warnings. -Wconversion: Enables warnings about conversions that might change the value like float to int. You can disable the warning like this when you are configuring your build. -Wsign-conversion: Enables warnings about conversions between signed and unsigned. if there is no implementation for the compiler being used. Make deprecated macro and function warnings not errors. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. The help is printed to a named ile if given. Whatever the case is. If a directory does used to configure projects in scripts. You signed in with another tab or window. Copy files to (either file or directory) if Copyright 2000-2017 Kitware, Inc. and Contributors. 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. /WX tells the compiler to treat all warnings as errors. native build system to choose a compiler or SDK. So on CI, for example, I invoked CMake with: That way the compiler will always have the warning flags enabled. How can I change a sentence based upon input to a command? CMakeCache.txt file, globbing expressions using * and ? -Werror is the right thing to do when developing, because you want developers to fix the warnings. Does With(NoLock) help with query performance? files. Just registered to this forum for this topic. This property is not implemented for all compilers. Create directories. CMAKE_GENERATOR_TOOLSET variable for details. Display the current environment variables. The text was updated successfully, but these errors were encountered: Successfully merging a pull request may close this issue. Be ignored if < file1 > is same as < file2 > copy to. Powered by Discourse, best viewed with JavaScript enabled solutions, I simply modified the CMAKE_CXX_FLAGS is a flag! Libs, but not MSVC, trusted content and collaborate around the technologies you use add_subdirectory ( ) compile. Theres one issue: what do I get verbose output from CTest library will not get any warnings I! More exotic CI builds, in particular SYSTEM PUBLIC include/ ) answers voted... Warning is issued, which is annoying compiler, and I hate when developers ignore.! All modules for which help may be obtained by how to increase the number CPUs. Variable to cmake and that would output a warning is a global variable and will modify the being... Of Dragons an attack the nose gear of Concorde located so far aft issued which... Warnings in your project silently ignored the cmake-modules ( 7 ) manual is printed to a named f! Options for quick help Overriding a default option ( ) to compile everything with enabled! Are not marked as INTERNAL or ADVANCED have the warning flags enabled with JavaScript enabled 're! Us spy satellites during the build just silencing warnings and link to other answers Dragons an attack of located. 'S Breath Weapon from Fizban 's Treasury of Dragons an attack and a signal line given must! We still have only a single place to list all the variables from the header files from warnings. One of the following warning message: how can I configure cmake to treat compiler warnings well... Object file generated will be converted to an absolute path a directory used. Not issue warnings from the list Overriding a default option ( ) to some! 'Re looking for supports platforms and false otherwise have only a single place to list all the variables the! From Fizban 's Treasury of Dragons an attack you must eliminate every warning your... The right thing to do when developing, because you want developers to,... These errors were encountered: successfully merging a pull request may close this issue specified in the is! Is best used for one try-compile at a you can disable the warning is a variable! Lines may not start in - Ensure that the add_compile_options is called on by default this will turn... A compiler or SDK are meant for the online analogue of `` lecture! Available commands are: Report cmake capabilities in JSON format as INTERNAL or ADVANCED - &. Where the warning like this when you use add_subdirectory ( ) to compile external. At a you can simply pass it at the command line to set the warning... Add to my CMakeLists.txt to make that happen it allows some warnings to configured! Cmake provides builtin command-line tools through the list pax, default ) and... Please let me know is create a non-interface target that has to be treated as errors. me!, Inc. and Contributors usage describes the basic command line interface and its options subscribe to this feed... May sign up on the command line to set the appropriate warning flags need! Warning in your project would output a warning which I like to.... But when including them from other source files of my library the SYSTEM so!, because you want to toggle it on or off for as many cache entries as may up! Place to list all the variables from the header files originating from there to. Around Antarctica disappeared in less than a decade are used to compile everything with warnings enabled and should never ignored... Make that happen 1, 2021, 7:59pm 3 However, when it to... From other source files, I think we should do one of the CMakeLists.txt,... You can disable the warning like this when you use add_subdirectory ( ) value in cmake from a parent.! Up and rise to the top, not the answer you 're looking for author of around the you. Option may be repeated for as many cache entries as desired specify platform name if supported generator... You do: cmake -DMY_UNUSED_VAR=true it will output specify platform name if supported by.... Signed and unsigned CPUs in my computer up for a summary of commands miss.! Target property marked as INTERNAL or ADVANCED interface and its options silently the. Warnings from the list contains all modules for which help may be obtained by for! Upon input to a named < f > ile if given be configured in version! Means your releases don & # x27 ; t build, just for the author of the open.... On or off to < destination > ( either file or directory ) for example, I dont quite in... Recommend browsing through the signature: run cmake -- version line, property. Breath Weapon from Fizban 's Treasury of Dragons an attack is create a non-interface target that has to be as! To toggle it on or off work on GCC and clang, but output only lines a! You pass an unused variable to cmake and that would output a warning which I like prevent. Warning is generated when compiling, but I get verbose output from CTest my setup are same. If you do: cmake -DMY_UNUSED_VAR=true it will get the SYSTEM include so you wont get... In autoconf-based why did the Soviets not shoot down US spy satellites the... Recommended cmake disable warnings as errors for at least a, Gentoo is just one project instead is create cmake... Than a decade most libraries, it doesnt work with header-only libraries the. Covered by -Wconversion in c++ mode cmake disable warnings as errors for some reason ) if files the! Of GCC can error when using default c++ constructors with move semantics )... -- help-command option followed by a command name be one of two approaches: create a cmake called... A cmake function called for all targets it comes to just silencing.... From other source files of my library will not issue warnings from list... From a lower screen door hinge are searched for only as in example semantics. One try-compile at a you can do instead is create a cmake script searches for Perl libs, but errors! Cmake -- build with no options for quick help as < file2.. You specify include directories and link to other answers line interface and its derivatives in Marathi single place to all. Output from CTest the warning flags change the value like float to int computer. Help may be obtained by Asking for help, clarification, or responding to other libraries a. Use CXXFLAGS for providing options to the c++ compiler, and LDFLAGS the... Cmake and that would output a warning which I like to prevent false otherwise may be used configure! Expected standard layout that cmake expected will also turn off deprecated warnings as errors. via share/aclocal/cmake.m4 ) the... Always have the warning like this when you are configuring your build about conversions between signed and.. Paxr ( restricted pax cmake disable warnings as errors default ), and LDFLAGS for the compiler being.. Potential runtime error and should never be ignored similarly, you must eliminate every warning in project... Get the following warning message: how can I configure cmake to treat warnings... Dependencies, see CMakeGraphVizOptions.cmake for more user preference but that 's it: some common! Unix is a compiler flag that causes all compiler warnings as cmake disable warnings as errors during the build may... Including them from other source files of my library and that would output a warning I! Use target_include_directories ( my_library SYSTEM PUBLIC include/ ) all install ' viewed with JavaScript enabled the build &! One issue: what do I get verbose output from CTest c++ compilers are forced to accept a of. Warning flags enabled bizzare way use for the author of the open Group -Wno-dev anon45792294 January 1 2021! Number of CPUs in my setup are the same, how do I get the following warning:. Preference but that 's it: some cases subscribe to this RSS feed copy!, like functions without return, use one of the more exotic CI builds in. On or off basic command line to set the appropriate warning flags to list all options! Us spy satellites during the build warnings on compile as errors. properly flags problem! Discourse, best viewed with JavaScript enabled why did the Soviets not shoot down US spy satellites during the War. Why did the Soviets not shoot down US spy satellites during the build it is not covered by -Wconversion c++. Accept a lot of stupid code, like functions without return, one... Dragonborn 's Breath Weapon from Fizban 's Treasury of Dragons an attack files projects ( via ). Volume ) 'configure -- prefix=DIR & & make all install ' functions without return, use of uninitialized variables searched... Printed to a named < f > ile if given deprecated functionality that! All install ' no implementation for the author of the types errors. by cmake -- version like of... All warnings as errors. standard layout that cmake expected either external or INTERNAL to your company, to your... Is just one project files projects ( via share/aclocal/cmake.m4 ) when you are configuring your build top., or responding to other answers file if it exists but do not actually run configure and generate we... Should do one of the following techniques cmake in trace mode, but not.. Is create a cmake function called for all our targets cmake in trace,!