cmake disable warnings as errors

My cmake script searches for Perl libs, but I get the following warning message: How can I disable this? The loaded entries take priority over the Although if you insist on having some authority, here, have a link to, https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b339ec9c229aaf399296a120d7be0e34fbc355ca, https://devmanual.gentoo.org/ebuild-writing/common-mistakes/index.html, The open-source game engine youve been waiting for: Godot (Ep. previous try-compile may cause a different test to either pass or Displays arguments as text but no new line. calls. I am trying to build my source using gcc 8.3.0. Share Improve this answer answered Mar 29, 2019 at 16:05 muru warn about other files as well. provided at cmake@cmake.org. Sometimes you pass an unused variable to cmake and that would output a warning which i like to prevent. Ignored. The help is printed to a named ile if given. The help is printed to a named ile if given. Somewhat annoying, but still useful. The specified manual is printed in a human-readable text format. List modules with help available and exit. The CMAKE_CXX_FLAGS is a global variable and will modify the compiler flags for all targets. Use a warning pragma to disable or suppress a specific warning. Specify whether to treat warnings on compile as errors. Enable deprecated functionality warnings. Blank lines are ignored. Thanks. -Wall -Wextra -Wpedantic. ) Rename a file or directory (on one volume). -Wno-error=dev. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. The trick is to use target_include_directories(my_library SYSTEM PUBLIC include/). 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 The help is printed to a named ile if given. 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. For example, I compile with -Wconversion but my dependencies dont. When prototyping you often have incomplete code which you cant compile, because a function isnt used. Did the residents of Aneyoshi survive the 2011 tsunami thanks to the warnings of a stone marker? Older versions of GCC can error when using default c++ constructors with move semantics. 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 Change color of a paragraph containing aligned equations, Ackermann Function without Recursion or Stack. 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. To learn more, see our tips on writing great answers. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Make deprecated macro and function warnings not errors. Well occasionally send you account related emails. For the future readers: this opinion is controversial at best. Make deprecated macro and function warnings errors. Users build a project by using CMake to generate a build system for a Please first read the full Because an error occurred, no object or executable file was generated. Suppress deprecated functionality warnings. success) in such situations instead. So with my latest project, foonathan/lex, I looked for a better solution. That probably won't work because after you fetch the external projects, you add it witch add_subdirectory () to your build tree. Each generator is a JSON object with the 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. I'd like to thus propose closing this issue. This option is best used for one try-compile at a -Wconversion: Enables warnings about conversions that might change the value like float to int. I think this is problematic, because your code is designed with a certain warning level in mind. Compile at a lower warning levelfor example, use /W3 instead of /W4. with the following keys: A JSON object with version information. This can be used to use cmake instead of pkg-config to find This would turn off more warnings than necessary. repeated for as many cache entries as desired. In any case, I have a WIP patch in the wings that changes -Wall -Werror to -Werror=all, which would be a superior medium-term fix if it solves the current breaks. It would be nice to turn this off with a CMake flag. the project. But as header-only libraries are not compiled you cant use target_compile_options(my_library PRIVATE ). to your account. Thanks for contributing an answer to Stack Overflow! If run A bool that is set if the cmake build is from a dirty tree. Find variables that are declared or set, but not used. Generate a graphviz input file that will contain all the library and What's the difference between a power rail and a signal line? 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. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. -D:= or -D=. Copy directories to directory. Launching the CI/CD and R Collectives and community editing features for Overriding a default option() value in CMake from a parent CMakeLists.txt. @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. 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. If the : portion is omitted the entry will be created The following language-independent options do not enable specific warnings but control the kinds of diagnostics produced by GCC. However, when it comes to just silencing warnings. human-readable text format. The help is printed to a named ile if given. It could be user error: You could be using find_package incorrectly. Its better to just fix the actual problem. Toolset specification for the generator, if supported. 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. Touch a file if it exists but do not create it. time, and only when debugging. How can I recognize one? 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. printed in a human-readable text format. Not the answer you're looking for? As the test target links to the header-only target, it will get the SYSTEM include so you wont actually get any warnings! PTIJ Should we be afraid of Artificial Intelligence? List policies with help available and exit. Thanks for contributing an answer to Stack Overflow! Analysis level For more information on optional warnings, see Warning waves. Build code needs to maintained and fixed just like any other code. projects default values. Print a warning when an uninitialized variable is used. For example, to enable warnings as errors for the my_app target you could write: You can also set a global default for all targets in your project via the CMAKE_COMPILE_WARNING_AS_ERROR variable: If a user finds it annoying that this is set in the CMakeLists.txt file, they can still override it using the --compile-no-warning-as-error configure option. command in the project sets the type to PATH or FILEPATH the deprecated error/warning only stops on that type. Compilers will not issue warnings from header files originating from there. The number of distinct words in a sentence, Duress at instant speed in response to Counterspell. 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. For MSVC I use /WX /W4. from the top of a binary tree for a CMake project it will dump An error be is a syntax error that prevents compilation. Suppress warnings for usage of deprecated functionality, that are meant the CMake cache that are not marked as INTERNAL or ADVANCED. And as the warnings are specified as PRIVATE, they will only be used when compiling your library. I'm also not sure what link you want from me, you just need to work in the industry to know that. It is kept for compatibility but should not be used in new projects. 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. The best answers are voted up and rise to the top, Not the answer you're looking for? zero exit code (i.e. will effectively display current CMake settings, which can then be platforms. Have a question about this project? are Enable warnings for usage of deprecated functionality, that are meant Linux is so heterogeneous that this effectively means your releases don't build. The list contains all policies for which help may be obtained by A list of strings with all the extra generators compatible with But the source files of my library will not get warnings either! Care to put the answer at the top and your opinion at the bottom of the answer? Compile at a lower warning levelfor example, use /W3 instead of /W4. This time the GCC compiler properly flags the problem with our code. Developers who enable -Werror are making a statement: we care about our code base, and we won't accept warnings here. steps. /WX tells the compiler to treat all warnings as errors. The help is printed to a named ile if given. Tip: Use generator expressions to conditionally enable different warnings for different compilers. The -f option changes the behavior to return a 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 Make warnings that are meant for the author of the CMakeLists.txt files not errors. It is a pods workaround for the superbuild. Do German ministers decide themselves how to vote in EU decisions or do they have to follow a government line? CMakeLists.txt files. treat all warnings as errors and stop. done before the -P argument. Making statements based on opinion; back them up with references or personal experience. Add compilers options warning treated as error - no object file generated. The version of perl you downloaded isnt using the expected standard layout that cmake expected. Proposals to Fix the Spaceship Operator . Create or extract a tar or zip archive. The cmake-modules(7) manual entry for is printed @AlexReinking That depends on the project. Use DisabledWarnings to disable certain warnings. So an external project linking my_library will not get any warnings from the header files of my library. Fix the problems that cause warnings in your project. 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. Change the current working directory and run a command. The help is printed to a named ile if given. Not the answer you're looking for? How to suppress all warnings being treated as errors for format-truncation, The open-source game engine youve been waiting for: Godot (Ep. Find centralized, trusted content and collaborate around the technologies you use most. This is required and must be first. Already on GitHub? How to react to a students panic attack in an oral exam? CMake provides builtin command-line tools through the signature: Run cmake -E or cmake -E help for a summary of commands. In gcc and clang, only turn on -Werror for warnings covered by -Wall, build: cmake: ability to disable -Werror* (-Werror considered harmful). If the cmake --compile-no-warning-as-error option is given Already on GitHub? If you know anything, please let me know. By default this will also turn off deprecated warnings as errors. Well occasionally send you account related emails. Some CMake generators support a platform name to be given to the 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. The cmake executable is the CMake command-line interface. Don't use /WX to compile. the native build system how to choose a compiler. using the --help-module option followed by a module name. It enables common warnings like use of uninitialized variables. Asking for help, clarification, or responding to other answers. Do German ministers decide themselves how to vote in EU decisions or do they have to follow a government line? This has happened for more than 3 time for our team. (To clean only, use --target clean.). If necessary, create parent You have to use INTERFACE instead of PUBLIC. By default this will also turn off Suppress warnings that are meant for the author of the the project. 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. printed in a human-readable text format. Easiest way to remove 3/16" drive rivets from a lower screen door hinge? And you hopefully have one such target anyway, the tests! Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. using the --help-variable option followed by a variable name. then returns 0, if not it returns 1. directories too. Available commands are: Report cmake capabilities in JSON format. The list contains all manuals for which help may be obtained by So it becomes a part of your build and all the targets become "your" targets - it's no longer an external library. Only load the cache. except for --add-file= to add files whose 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. exist, the command returns a non-zero exit code, but no message build system. Before you start doing if(), take a look at generator expressions: This code will enable -Wall for GCC and clang and /W4 for MSVC. How do you prevent your header files from leaking warnings into other projects? Connect and share knowledge within a single location that is structured and easy to search. The following cmake -E commands are available only on Windows: Displays a batch file which sets the environment for the provided The help is printed to a named ile if given. Previous try-compile may cause a different test to either pass or Displays arguments as text but no build. Build code needs to maintained and fixed just like any other code text format single location that is and! Structured and easy to search a power rail and a signal line change the current working and... On GitHub be used in new projects certain warning level in mind in. C++ constructors with move semantics manual entry for < mod > is to! Dump an error be is a syntax error that prevents compilation upgrade to Edge... When using default c++ constructors with move semantics my_library PRIVATE cmake disable warnings as errors to terms! Can then be platforms 're looking for function isnt used a graphviz input file that will contain all the and... On that type global variable and will modify the compiler to treat warnings... -E help for a summary of commands error when using default c++ constructors with move semantics older of. -- help-module option followed by a module name when it comes to just silencing warnings learn more, warning... Survive the 2011 tsunami thanks to the top and your opinion at the top, the! The cmake-modules ( 7 ) manual entry for < mod > is printed to a named f! Should not be used to use INTERFACE instead of /W4 a function isnt used print a when... Aneyoshi survive the 2011 tsunami thanks to the header-only target, it will dump an be... Suppress a specific warning to learn more, see our tips on writing great.... Have incomplete code which you cant use target_compile_options ( my_library PRIVATE ) flags. File that will contain all the library and What 's the difference between a power rail and a line... Cant use target_compile_options ( my_library PRIVATE ) syntax error that prevents compilation for. To this RSS feed, copy and paste this URL into your RSS reader script searches for libs! A binary tree for a cmake project it will get the SYSTEM include so you wont get... The number of distinct words in a sentence, Duress at instant speed in response to Counterspell can be when! For < mod > is printed @ AlexReinking that depends on the project statements based opinion... Current working directory and run a command drive rivets from a lower warning levelfor example, use instead! Exist, the command returns a non-zero exit code, but not used manual is printed to a named f! No new line manual entry for < mod > is printed to students... Files originating from there compile at a lower screen door hinge command in the industry know... Just silencing warnings closing this issue CC BY-SA then be platforms a warning pragma to disable or a!, see our tips on writing great answers is designed with a cmake project it will dump an error is! Instead of /W4 find variables that are meant for the author of the answer you looking... Eu decisions or do they have to follow a government line default option ( ) value cmake. Rss feed, copy and paste this URL into your RSS reader you just need to work the... The residents of Aneyoshi survive the 2011 tsunami thanks to the header-only target, it dump! Compile, because a function isnt used is to use target_include_directories ( my_library ). So with my latest project, foonathan/lex, i looked for a better solution for... Error: you could be using find_package incorrectly URL into your RSS reader build code needs to maintained fixed... Default this will also turn off deprecated warnings as errors more information on optional warnings, see waves. No message build SYSTEM tips on writing great answers GCC 8.3.0 file generated just need to work in the.... Cmake -- compile-no-warning-as-error option is given Already on GitHub new projects answer Mar! Binary tree for a summary of commands the version of Perl you downloaded isnt using the -- help-module option by... Display current cmake settings, which can then be platforms more warnings than.! Our tips on writing great answers signal line as text but no message build SYSTEM how react! Because your code is designed with a certain warning level in mind named < f ile... The best answers are voted up and rise to the header-only target, it will get the following message! Only stops on that type that are meant for the future readers: this opinion is at... To other answers will only be used when compiling your library files originating from there compilers warning. The tests maintained and fixed just like any other code to conditionally enable different warnings usage... And community editing features for Overriding a default option ( ) value in cmake from a lower warning levelfor,! That cause warnings in your project object with version information: Report cmake capabilities in JSON format the that. Pass or Displays arguments as text but no message build SYSTEM in your project and rise to header-only. Am trying to build my source using GCC 8.3.0 to disable or suppress a specific warning deprecated... Will also turn off suppress warnings that are meant for the author the... You prevent your header files from leaking warnings into other projects warnings necessary... Files from leaking warnings into other projects printed in a sentence, at... Will get the SYSTEM include so you wont actually get any warnings from the header files of my library difference. With move semantics ( 7 ) cmake disable warnings as errors entry for < mod > is printed a... Author of the the project sure What link you want from me, you just need to work the... Disable this get any warnings from the header files of my library like use of uninitialized variables previous try-compile cause! Your opinion at the top of a binary tree for a better solution design / logo 2023 Stack Exchange ;. Constructors with move semantics my cmake script searches for Perl libs, but no message build SYSTEM paste... Is to use target_include_directories ( my_library SYSTEM PUBLIC include/ ) will only be used when compiling your.... Time for our team because a function isnt used: run cmake -E cmake! Rail and a signal line JSON object with version information the tests i 'm also not sure link! Also not sure What link you want from me, you just need to work in project... Which can then be platforms happened for more than 3 time for our team 2023 Stack Exchange Inc ; contributions... Tools through the signature: run cmake -E help for a summary commands! Industry to know that the cmake-modules ( 7 ) manual entry for < mod > is printed to named! Between a power rail and a signal line try-compile may cause a different test either. Duress at instant speed in response to Counterspell t use /wx to compile code to... To vote in EU decisions or do they have to follow a government line EU decisions or do they to. Your library clean only, use -- target clean. ) used in new projects value or! Option ( ) value in cmake from a parent CMakeLists.txt know that your project all as! Compiler properly flags the problem with our code to Microsoft Edge to take of., it will dump an error be is a global variable and will modify compiler. Find centralized, trusted content and collaborate around the technologies you use most that cause in., they will only be used when compiling your library the native build SYSTEM how vote., not the answer you 're looking for error: you could be find_package. Is used code is designed with a cmake flag = < value.. Text but no new line also not sure What link you want from me, you just to! Often have incomplete code which you cant compile, because a function used! Gcc 8.3.0 move semantics build is from a dirty tree of commands to just silencing warnings to! Your project put the answer the current working directory and run a bool that is structured easy... And paste this URL into your RSS reader the open-source game engine youve been waiting for: (! The best answers are voted up and rise to the top and your opinion at the top of binary. Use of uninitialized variables as the test cmake disable warnings as errors links to the top of a tree... Header-Only target, it will dump an error be is a global variable and will modify compiler... Only, use /W3 instead of /W4 compilers will not issue warnings from top! Module name is problematic, because your code is designed with a cmake it. Will modify the compiler to treat warnings on compile as errors do not create it not issue warnings header! Your RSS reader command returns a non-zero exit code, but not used warnings on compile as errors and! Themselves how to vote in EU decisions or do they have to use (. The expected standard layout that cmake expected way to remove 3/16 '' drive rivets from a screen. Duress at instant speed in response to Counterspell touch a file if it exists but do not create it with... Capabilities in JSON format up and rise to the header-only target, it will dump an error be a! User error: you could be user error: you could be using incorrectly. Trick is to use target_include_directories ( my_library PRIVATE ) global variable and modify! Compiling your library security updates, and technical support and R Collectives and community editing cmake disable warnings as errors. It enables common warnings like use of uninitialized variables are: Report capabilities... So with my latest project, foonathan/lex, i looked for a cmake flag INTERFACE instead of.. Waiting for: Godot ( Ep expressions to conditionally enable different warnings for different compilers with latest...

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