That is to say, it should not be on by default (but if you insist, then there must be a way to disable it). How can I change a sentence based upon input to a command? It is a good practice despite what is written in this answer. I like this one because it forces me to fix warnings. Ensure that the add_compile_options is called on . using the --help-command option followed by a command name. Once with PRIVATE and once with SYSTEM INTERFACE. but use PRIVATE to prevent them from enabling warnings in projects linking to your target. I am happy to simply suppress with -Wno-dev, Powered by Discourse, best viewed with JavaScript enabled. Economy picking exercise that uses two consecutive upstrokes on the same string. If run Launching the CI/CD and R Collectives and community editing features for Overriding a default option() value in CMake from a parent CMakeLists.txt. Enable warnings for usage of deprecated functionality, that are meant It's better to just fix the actual problem. Suppress warnings that are meant for the author of the Many are likely using a different toolchain with different sets of warnings and sensitivities for those warnings. The cmake-variables(7) manual is printed in a For GCC/clang I usually have the following set of warnings: -Werror: Treat warnings as errors. The currently implemented compiler IDs are: GNU Clang AppleClang Fujitsu FujitsuClang IBMClang Intel I have exactly the same needs as @chrilleman . In this article, we will add compiler options that will raise warnings in ST's generated files and we will ask CMake to suppress these warnings but only for these files. the generator. You signed in with another tab or window. Which basecaller for nanopore is the best to produce event tables with information about the block size/move table? 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. See the A list available generators. Economy picking exercise that uses two consecutive upstrokes on the same string, How to choose voltage value of capacitors. 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. So, it may be a configuration issue. Just registered to this forum for this topic. @david-german-tri Let's DM about who is going to take on this ticket. 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. Not sure where I need to put -Wno-dev. The help is printed to a named ile if given. rev2023.3.1.43269. I am looking for a more general option, something like: CMAKE_WARN_AS_ERROR. Why did the Soviets not shoot down US spy satellites during the Cold War? errors. The help is printed to a named ile if given. By default this will also turn on deprecated warnings as errors. deprecation warnings. A Wiki is provided containing answers to frequently asked questions. the CMake cache that are not marked as INTERNAL or ADVANCED. Has Microsoft lowered its Windows 11 eligibility criteria? It decouples the warning options from your version control system and build files. If the : portion is omitted the entry will be created The list contains all variables for which help may be obtained by The trick is to use target_include_directories(my_library SYSTEM PUBLIC include/). The cmake-commands(7) manual entry for is If a directory does except for --add-file= to add files whose exist, the command returns a non-zero exit code, but no message It would be nice to turn this off with a CMake flag. native tool on their platform. Make warnings that are meant for the author of the CMakeLists.txt files not errors. List variables with help available and exit. I would like cmake to stop immediately if it encounters any internal error. CMake provides a command-line signature to build an already-generated Has 90% of ice around Antarctica disappeared in less than a decade? What happened to Aham and its derivatives in Marathi? What is CMake equivalent of 'configure --prefix=DIR && make all install '? The following language-independent options do not enable specific warnings but control the kinds of diagnostics produced by GCC. Build target clean first, then build. The cmake executable is the CMake command-line interface. It turns out the answer was to simply add the line. Process the given cmake file as a script written in the CMake Usage describes the basic command line interface and its options. command in the project sets the type to PATH or FILEPATH Find problems with variable usage in system files. Not the answer you're looking for? may sign up on the CMake web page. When will the moons and the planet all be on one straight line again? Of course, there are more warnings not enabled by those ones. Are there conventions to indicate a new item in a list? 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. Normally, unused and uninitialized variables are searched for only Find centralized, trusted content and collaborate around the technologies you use most. on the cmake(1) command line, this property is ignored. Why does the Angel of the Lord say: you have not withheld your son from me in Genesis? they have changed. Create directories. specified by the set() command documentation for its and produces tonnes of warnings with MSVC: -Wextra: Some more common warnings not enabled by -Wall. Make warnings that are meant for the author of the CMakeLists.txt files Copyright 2000-2023 Kitware, Inc. and Contributors. directories too. time, and only when debugging. Suspicious referee report, are "suggested citations" from a paper mill? 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. The simpler, the better. This flag tells CMake to rev2023.3.1.43269. However, when it comes to just silencing warnings. You can disable the warning like this when you are configuring your build. As the test target links to the header-only target, it will get the SYSTEM include so you wont actually get any warnings! in a human-readable text format. List commands with help available and exit. Unix & Linux Stack Exchange is a question and answer site for users of Linux, FreeBSD and other Un*x-like operating systems. But theres one issue: By clicking Sign up for GitHub, you agree to our terms of service and Open up the CMakeLists.txt file and, underneath the section add_executable, add the following: target_compile_options(${PROJECT_NAME} PRIVATE. CMake may support multiple native build systems on certain But how do you manage the very compiler-specific flags in CMake? @ixSci - flagged for CoC. You have to use INTERFACE instead of PUBLIC. You should open up a new question and create a reproducible scenario to answer your new question. So the header files have a couple of instances where the warning is issued, which is annoying. Because an error occurred, no object or executable file was generated. While the above method works greater for most libraries, it doesnt work with header-only libraries. List modules with help available and exit. Browse other questions tagged. done before the -P argument. The help is printed to a named ile if given. then the will be converted to an absolute path. following options: Project binary directory to be built. RV coach and starter batteries connect negative to chassis; how does energy from either batteries' + terminal know which battery to flow back to? 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 help is printed to a named ile if given. from the top of a binary tree for a CMake project it will dump The following cmake -E commands are available only on UNIX: Create a symbolic link naming . Enable warnings that are meant for the author of the CMakeLists.txt Specify whether to treat warnings on compile as errors. Created using. The help is printed to a named ile if given. Create MD5 checksum of files in md5sum compatible format: Remove the file(s). -Werror is a compiler flag that causes all compiler warnings to be treated as errors. Displays arguments as text but no new line. A bool that is set if the cmake build is from a dirty tree. Like the one I tried above. documentation at https://cmake.org before posting questions to Is variance swap long volatility of volatility? CMAKE_GENERATOR_TOOLSET variable for details. This property is not implemented for all compilers. human-readable text format. Tip: Use generator expressions to conditionally enable different warnings for different compilers. Many are likely using a different toolchain with different sets of warnings and sensitivities for those warnings. Use with care, you can make your CMakeCache.txt non-working. in CMAKE_SOURCE_DIR and CMAKE_BINARY_DIR. They have an awkward set of linker flags to link to a specially built libc++. 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. repeated for as many cache entries as desired. Let's fix that. The only thing I dont quite like in my setup are the warnings about unused functions/variables/etc. It is perfectly fine to have high level warning level and treat-W-as-E in the projects. But they did prevent a couple of bugs, so Ill keep them enabled. Depending on the makefile, you probably need something like, I do not want to edit the make file, is there a way to do it only via the command line argument. It may be may be specified on the command line with the -D option. If the : portion is given it must be one of the types their build process with platform-independent CMake listfiles included 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? - 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. How does a fan in a turbofan engine suck air in? This can be configured in CMake version 3.24 and higher via the COMPILE_WARNING_AS_ERROR target property. Too much of your opinion and too little of the actual answer. How does a fan in a turbofan engine suck air in? Suppress warnings for usage of deprecated functionality, that are meant By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. I understand the motivation for enabling the -Werror flag: I also have a zero-warning policy, and I hate when developers ignore warnings. This is the opposite of PRIVATE which is only used for your target and never for external. Do German ministers decide themselves how to vote in EU decisions or do they have to follow a government line? printed in a human-readable text format. Thank you! This option may also be given as a single argument: display help for each variable. Can you just provide answer on how to ignore all warnings instead of giving advices nobody is looking for? What's the difference between a power rail and a signal line? Note that this is not equivalent to -Werror -pedantic, because why would it? CACHE signature. takes priority over the projects default value. Theoretically Correct vs Practical Notation. treat all warnings as errors and stop. platforms. A warning is a potential runtime error and should never be ignored. Make warnings that are meant for the author of the CMakeLists.txt files not Compile at a lower warning levelfor example, use /W3 instead of /W4. names start in -. true if the generator supports toolsets and false otherwise. Enabling -Werror by default causes broken builds for your consumers and is a bad practice. if you do: CMake Warning: Manually-specified variables were not used by the project: MY_UNUSED_VAR. I occasionally forgot to do that, implemented a feature, pushed it to CI. Share Improve this answer answered Mar 29, 2019 at 16:05 muru It may So an external project linking my_library will not get any warnings from the header files of my library. Whatever the case is. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. If directory does not exist it will be created. Temporarily, I want to only see errors when I run make. directory and it must exist. privacy statement. What is the idiomatic way in CMAKE to add the -fPIC compiler option? If variables are defined using -D, this must be 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. The help is printed to a named ile if given. 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. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, I'd rather make the compiler stop on the first error when I want to see it clear. And you hopefully have one such target anyway, the tests! How can I silence the warning if this is happening inside the cmake find_package code for PerlLibs ? 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. I think this is problematic, because your code is designed with a certain warning level in mind. Later compilation doesnt touch that file again, so the warnings is not emitted again. Thanks for contributing an answer to Stack Overflow! Rename a file or directory (on one volume). -Werror is the right thing to do when developing, because you want developers to fix the warnings. The CI runs on windows, osx and ubuntu, but the warning only appears on ubuntu. This mode is not well-supported due to some technical limitations. Only useful on one try_compile at a time. using the --help-manual option followed by a manual name. The warnings are used to compile everything with warnings enabled. This is required and must be first. implemented compiler IDs are: This property is initialized by the value of the variable Enable deprecated functionality warnings. 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. If a directory already exists it will be Specify whether to treat warnings on compile as errors. Path to where symbolic link will be created has to exist beforehand. What is the nominal CMake spelling for CXXLDFLAGS or whatever? 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. -Wall: A better name would be -Wcommon. Connect and share knowledge within a single location that is structured and easy to search. as in example? This is a nice clean solution, the only issue is that the compiler flags are compiler dependent. To learn more, see our tips on writing great answers. What would happen if an airplane climbed beyond its preset cruise altitude that the pilot set in the pressurization system? The help is printed to a named ile if given. Here is a CLI example where I configure/generate my build and turn off cmake dev warnings. To fix this error, you must eliminate every warning in your project. Would the reflected sun's radiation melt ice in LEO? To fix, use one of the following techniques. Sometimes you pass an unused variable to cmake and that would output a warning which i like to prevent. You can simply pass it at the command line when you want to toggle it on or off. Compile at a lower warning levelfor example, use /W3 instead of /W4. rev2023.3.1.43269. Print a trace of all calls made and from where. This is problematic when you use add_subdirectory () to compile some external dependencies which do not compile without warnings. 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. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Displays a batch file which sets the environment for the provided silently ignored. The list contains all modules for which help may be obtained by It is kept for compatibility but should not be used in new projects. mkfifo with all permissions still errors with permissions denied for other user, tp-link Archer T4U make error (kali linux), Cross-compiling Linux kernel fails on bzImage. There are cases when it should be a user preference but that's it: some cases. Adding the include directory again but without SYSTEM doesnt seem to work reliably, The text was updated successfully, but these errors were encountered: Successfully merging a pull request may close this issue. Our current project has ~20 sub-directires and we have to manage ~40 custom options. The cmake-modules(7) manual is printed in a human-readable You can use that to specify warnings as well. The following resources are available to get help using CMake: The primary starting point for learning about CMake. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Behavior is default in CMake >= 3.0. Warnings are diagnostic messages that report constructions that are not inherently erroneous but that are risky or suggest there may have been an error. It would be nice to turn this off with a CMake flag. Thanks for contributing an answer to Unix & Linux Stack Exchange! 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. A generator is responsible for generating a particular Use a warning pragma to disable or suppress a specific warning. For example, I compile with -Wconversion but my dependencies dont. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Enable deprecated functionality warnings. Print a warning when an uninitialized variable is used. Available commands are: Report cmake capabilities in JSON format. will effectively display current CMake settings, which can then be true if the generator supports platforms and false otherwise. It only takes a minute to sign up. Have a CMAKE option to disable warnings as errors, Large build overhaul, restructuring into "superbuild. Created using. the list. Hiding all warnings sounds like a not so good idea, or rather treat warnings as errors. warn about other files as well. Analysis level For more information on optional warnings, see Warning waves. UNIX is a registered trademark of The Open Group. This would turn off more warnings than necessary. Thanks for contributing an answer to Stack Overflow! This option may be used to specify a setting that It is silently ignored if there is no implementation for the compiler being used. Is lock-free synchronization always superior to synchronization using locks? for the author of the CMakeLists.txt files. CMakeGraphVizOptions.cmake for more details. The help is printed to a named ile if given. The given file should be a CMake script That way you will automatically have warnings when compiling your project but other users wont. Do not delete the try_compile build tree. paxr (restricted pax, default), and zip. The help is printed to a named ile if given. 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. The cmake-variables(7) manual entry for is provided at cmake@cmake.org. The major version number in integer form. The help is printed to a named ile if given. using the --help-variable option followed by a variable name. printed in a human-readable text format. All manuals are printed in a human-readable text format. I am working up a PR to use that phrasing for both gcc and clang. Do German ministers decide themselves how to vote in EU decisions or do they have to follow a government line? If a file does display also advanced variables. 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. Previous topic CMAKE_COMPILE_PDB_OUTPUT_DIRECTORY_<CONFIG> Next topic CMAKE_<CONFIG>_POSTFIX This Page Show Source Quick search Warnings are important, especially in C++. This time the GCC compiler properly flags the problem with our code. however change the results of the try-compiles as old junk from a Already on GitHub? Previously, I simply modified the CMAKE_CXX_FLAGS variable on the command line to set the appropriate warning flags. the deprecated error/warning only stops on that type. It is a pods workaround for the superbuild. then returns 0, if not it returns 1. The loaded entries take priority over the 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. If you compile with an option such as -Werror to treat warnings as errors, this is a blocking issue. As final solutions, I think we should do one of two approaches: Create a CMake function called for all our targets. If multiple files are specified, the must be But they can at least issue a warning if you do such things. Fix the problems that cause warnings in your project. Pass remaining options to the native tool. How to suppress PAM audit logs for RHEL8? 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 If the cmake --compile-no-warning-as-error option is given on the cmake (1) command line, this property is ignored. Cli example where I configure/generate my build and turn off CMake dev warnings the file ( s ) object executable... Do you manage the very compiler-specific flags in CMake version 3.24 and higher via the COMPILE_WARNING_AS_ERROR property... Implemented compiler IDs are: GNU Clang AppleClang Fujitsu FujitsuClang IBMClang Intel I have exactly the same string, to... Is that the pilot set in the CMake ( 1 ) command line, this property is ignored when. A free GitHub account to open an issue and contact its maintainers and the community on writing great answers most. Melt ice in LEO current CMake settings, which can then be true if generator. Implemented compiler IDs are: report CMake capabilities in JSON format, the!! A question and answer site for users of Linux, FreeBSD and other Un * x-like operating.... Set if the CMake find_package code for PerlLibs, this property is initialized the! The projects provided at CMake @ cmake.org am happy to simply add the -fPIC option... & Linux Stack Exchange of warnings and sensitivities for those warnings to link to a <.: the primary starting point for learning about CMake an awkward set of linker to. Want to only see errors when I run make CMake @ cmake.org environment for the author of the Group. They did prevent a couple of instances where the warning like this when you developers. The results of the CMakeLists.txt files not errors a good practice despite is... You must eliminate every warning in your project up a new item in a human-readable text.... Pr to use cmake disable warnings as errors to Specify warnings as errors this RSS feed, copy and paste this into. Variables were not used by the value of capacitors would it CMake find_package code for PerlLibs feature pushed. Https: //cmake.org before posting questions to is variance swap long volatility of volatility free GitHub account to cmake disable warnings as errors issue... 2000-2023 Kitware, Inc. and Contributors Find centralized, trusted content and collaborate around the technologies use. A signal line also be given as a script written in this.... Hate when developers ignore warnings best viewed with JavaScript enabled compile with an option such as -Werror treat! On windows, osx and ubuntu, but the warning like this one because it forces me fix... Like a not so good idea, or rather treat warnings on compile as,! Argument: display help for each variable pressurization system built libc++ command line with the option! Other users wont variables are searched for only Find centralized, trusted content and around... Of your opinion and too little of the try-compiles as old junk from a paper mill following.... Doesnt touch that file again, so Ill keep them enabled a bad practice above method greater. Github account to open an issue and contact its maintainers and the planet all be on one volume.... Been an error occurred, no object or executable file was generated our tips writing... I compile with -Wconversion but my dependencies dont compiler being used warnings enabled... Compile_Warning_As_Error target property to ignore all warnings instead of /W4 configuring your build different toolchain with sets... A command < destination > directory does not exist it will be converted to an path... Rather treat warnings on compile as errors, Large build overhaul, restructuring into ``.. Not errors can simply pass it at the command line to set appropriate. Of bugs, so Ill keep them enabled @ david-german-tri Let 's DM about who is to... Touch that file again, so the warnings about unused functions/variables/etc the command to... Simply suppress with -Wno-dev, Powered by Discourse, best viewed with JavaScript enabled configure/generate my and. Thanks for contributing an answer to unix & Linux Stack Exchange the -- help-command option followed a. Learning about CMake of PRIVATE which is only used for your consumers and is a CLI example where configure/generate... Do German ministers decide themselves how to ignore all warnings instead of /W4 and is a blocking issue volume... Who is going to take on this ticket a setting that it is perfectly fine to have high warning... It at the command line to set the appropriate warning flags the test target links to the header-only,. Already-Generated has 90 % of ice around Antarctica disappeared in less than a decade we have follow! Later compilation doesnt touch that file again, so Ill keep them enabled but use to! Citations '' from a dirty tree variable usage in system files anyway, the tests FILEPATH Find with! Into your RSS reader variance swap long volatility of volatility on writing great answers setting that it is good! Warning pragma to disable or suppress a specific warning not emitted again can I silence warning... The very compiler-specific flags in CMake to ignore all warnings instead of /W4 Linux, FreeBSD and other Un x-like. For nanopore is the right thing to do when developing, because why would it which I like this because. Display help for each variable properly flags the problem with our code if it any! 'S the difference between a power rail and a signal line in md5sum compatible format Remove. To stop immediately if it encounters any INTERNAL error, no object executable! Going to take on this ticket to simply add the line error and should never be ignored the. And sensitivities for those warnings your build and ubuntu, but the warning is issued, which can be. Ibmclang Intel I have exactly the cmake disable warnings as errors needs as @ chrilleman version control and... Disable warnings as errors compiler-specific flags cmake disable warnings as errors CMake to stop immediately if it encounters any INTERNAL error the project MY_UNUSED_VAR... If given or suppress a specific warning my setup are the warnings about unused functions/variables/etc and contact maintainers... Causes all compiler warnings to be treated as errors this option may be used to compile some external dependencies do! Warnings and sensitivities for those warnings preset cruise altitude that the compiler are! That the pilot set in the project: MY_UNUSED_VAR later compilation doesnt that. Cache that are not inherently erroneous but that 's it: some cases a question and answer for! Working up a new question and answer site for users of Linux, FreeBSD and other Un * x-like systems! Fujitsu FujitsuClang IBMClang Intel I have exactly the same string, how to vote EU. To answer your new question not so good idea, or rather warnings! To open an issue and contact its maintainers and the planet all be on one volume ) make all '. Site for users of Linux, FreeBSD and other Un * x-like operating systems everything with warnings enabled where warning! Level for more information on optional warnings, see our tips on writing great answers collaborate around the you.: CMAKE_WARN_AS_ERROR to set the appropriate warning flags tables with information about the block size/move?. In EU decisions or do they have to follow a government line that to Specify a that... Not used by the project sets the environment for the author of the files! Some technical limitations deprecated warnings as errors an awkward set of linker flags link! Automatically have warnings when compiling your project and paste this URL into your RSS reader like to them... Do you manage the very compiler-specific flags in CMake to add the line advices nobody is for! Note that this is happening inside the CMake build is from a already on GitHub name. Touch that file again, so Ill keep them enabled be treated as.. Connect and share knowledge within a single argument: display help for each variable simply the... Antarctica disappeared in less than a decade the actual answer later compilation doesnt touch that again... The following techniques to Specify a setting that it is perfectly fine to high! Appleclang Fujitsu FujitsuClang IBMClang Intel I have exactly the same string, to! Capabilities in JSON format 2000-2023 Kitware, Inc. and Contributors only appears on ubuntu an...: Remove the file cmake disable warnings as errors s ) this is happening inside the CMake usage describes the command. Build is from a paper mill I occasionally forgot to do that, implemented a feature, pushed to. Are diagnostic messages that report constructions that are not inherently erroneous but that are risky suggest. Implemented compiler IDs are: GNU Clang AppleClang Fujitsu FujitsuClang IBMClang Intel I have exactly the same needs as chrilleman! When developing, because you want developers to fix, use /W3 instead of advices... A single location that is structured and easy to search used to Specify a setting that cmake disable warnings as errors! To -Werror -pedantic, because you want to only see errors when I run make sets the type to or. Is printed to a named < f > ile if given if given greater most. Compile without warnings and zip such target anyway, the tests themselves how to vote EU. S ) understand the motivation for enabling the -Werror flag: I also have CMake... You should open up a new question and answer site for users of,., so the warnings about unused functions/variables/etc directory ( on one volume ) IDs are: GNU Clang AppleClang FujitsuClang. Or FILEPATH Find problems with variable usage in system files anyway, the tests paxr restricted. 2000-2023 Kitware, Inc. and Contributors that way you will automatically have warnings compiling! Given CMake file as a script written in this answer warnings that are meant for the author of the files. ), and zip to fix, use /W3 instead of giving nobody... With our code control the kinds of diagnostics produced by GCC header files have a of. Than a decade the -fPIC compiler option of Linux, FreeBSD and other Un x-like!, I think we should do one of two approaches: create a CMake flag disable the warning like one!
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