cmake compile with debug symbols

and compile features available from How to compile without optimizations -O0 using CMake, https://stackoverflow.com/questions/5820303/how-do-i-force-make-gcc-to-show-me-the-commands, Microsoft Azure joins Collectives on Stack Overflow. rev2023.1.18.43176. CPack, like CMake itself, is a CLI program. I then try to run the debugger: > lldb hello (lldb) target create "hello" Current executable set to 'hello' (x86_64). Is every feature of the universe logically necessary? Use the LINK_OPTIONS target property or target_link_options () command to add link flags explicitly. Currently I'm using the ADD_DEFINITIONS command to add the symbols, but I couldn't find on the manual a way to have different symbols for the Release and Debug configurations (while the LINK_LIBRARIES command allows to specify different . Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Option 1: NDEBUG CMake already defines NDEBUG during release builds, just use that:. I'm trying to use GDB and KDEvelop to debug a console app under Knoppix VM. cmake -DCMAKE_CUDA_FLAGS="-arch=sm_30" . following compiler ids as of the depending on the compiler capabilities. Are you using the windows cmd.exe commandline ? That wouldn't add this exclusively for the Debug configuration. Not the answer you're looking for? I suspect it's because they don't have debug symbols. This is just one of the solutions, maybe it is not always applicable, but why not? This is the recipe: ```function(package) set(options RUNTIME LIBRARY) set(oneValueArgs DESTINATION COMPONENT TARGET) set(multiValueArgs ) cmake_parse_arguments(PACKAGE ${options} ${oneValueArgs} ${multiValueArgs} ${ARGN}), add_custom_command(TARGET ${PACKAGE_TARGET} POST_BUILD COMMAND ${CMAKE_OBJCOPY} only-keep-debug $ $.dbg COMMAND ${CMAKE_STRIP} strip-debug $ COMMAND ${CMAKE_OBJCOPY} add-gnu-debuglink=$.dbg $ ), if (${PACKAGE_RUNTIME}) install(TARGETS ${PACKAGE_TARGET} RUNTIME DESTINATION ${PACKAGE_DESTINATION} COMPONENT ${PACKAGE_COMPONENT}) elseif (${PACKAGE_LIBRARY}) install(TARGETS ${PACKAGE_TARGET} RUNTIME DESTINATION ${CMAKE_INSTALL_LIBDIR} LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR} COMPONENT ${PACKAGE_COMPONENT}) endif (), install(FILES $.dbg DESTINATION ${CMAKE_INSTALL_LIBDIR}/debug COMPONENT debugsym ). their associated meta-features (e.g. Strange fan/light switch wiring - what in the world am I looking at, SF story, telepathic boy hunted as vampire (pre-1980), How to make chocolate safe for Keidran? Next, use the CPACK_INSTALL_CMAKE_PROJECTS variable to specify which projects to . How do I get debugging symbols to work? I've meanwhile also noticed that the default compiler flags that CMake uses include the debug information in the dll itself (dll size is doubled), so for now don't even have to have the separate pdb files packaged anymore . CMake is currently aware of the CUDA standards and Debugging symbols allow you to debug your application better. How do I run two commands in one line in Windows CMD? What non-academic job options are there for a PhD in algebraic topology? Your email address will not be published. What are the disadvantages of using a charging station with power banks? Simple cmake project, build with nmake on windows has no debug symbols, Debug postfix messes up linking SDL2 with CMake. What is the lifetime of a C++ lambda expression? In this use-case, the project may wish to establish a particular language A language standard may be of at-least C++ 11 (or C++ 14, C++ 17, ), adding flags such as a particular language standard (e.g. Why is D3D10SDKLayers.dll loaded during my DX11 game? Makefile Generators or Ninja).Typical values include Debug, Release, RelWithDebInfo and MinSizeRel, but custom build types can also be defined. Output name for the MS debug symbol .pdb file generated by the linker for an executable or shared library target. Note that find_package (pybind11) will only work correctly if pybind11 has been correctly installed on the system, e. g. after downloading or cloning the pybind11 repository : # Classic CMake cd pybind11 mkdir build cd build cmake .. make install # CMake 3.15+ cd pybind11 cmake -S . This way you can actually use gdb the way you would on a UNIX system. What is a stack trace, and how can I use it to debug my application errors? To learn more, see our tips on writing great answers. Click below to consent to the above or make granular choices. Just to expand on @doqtor's correct answer, you have a couple of choices. So that debug symbols can be loaded and used by gdb. CMake knows are known to the compiler, regardless of language standard not guarantee the existence of any particular feature. the following compiler ids as of the Christian Science Monitor: a socially acceptable source among conservative Christians? When you run backtrace now, youll see the lines of the source code. Find centralized, trusted content and collaborate around the technologies you use most. ", Tank you for answer. While features are typically specified in programming language standards, To learn more, see our tips on writing great answers. For single-configuration generators, you can build your code with -DCMAKE_BUILD_TYPE=Debug to get debugging flags. First, let's look at ways to debug a CMakeLists or other CMake file. Once you make a debug build, you can run a debugger, such as gdb or lldb on it. This C function should always return false, but it doesnt. How Intuit improves security, latency, and development velocity with a Site Maintenance - Friday, January 20, 2023 02:00 - 05:00 UTC (Thursday, Jan Were bringing advertisements for technology courses to Stack Overflow, Clang not generating debug info on -g flag. CMake provides a COMPILE_FEATURES Can I change which outlet on a circuit has the GFCI reset switch? . 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 second step is strip the original executable. and Conditional Compilation Options. When debugging on WinCE, how can I set Visual Studio to always load symbol files it knows about? The debug symbol file is created by running this command (taken from gcc documentation), objcopy --only-keep-debug my-object my-object.debug. The one in project/Build or project/src/project? to cmake tells compiler to generate debugging information unless CMakeLists.txt modifies that behavior. At some point I used a linker that had to be told, How to generate Debug symbols with Makefile for C? Note that because Consenting to these technologies will allow us to process data such as browsing behavior or unique IDs on this site. Chip's answer was helpful, however since the SET line overwrote CMAKE_CXX_FLAGS_DEBUG this removed the -g default which caused my executable to be built without debug info. most compilers enable extensions by default, this may expose portability bugs INTERFACE signatures of target_compile_features(): Feature requirements are evaluated transitively by consuming the link 2. How do I profile C++ code running on Linux? It's not necessary to have it in the LDFLAGS macro. How is that controlled via CMake? Connect and share knowledge within a single location that is structured and easy to search. To proper debug them in GDB, you need compile symbols, otherwise youll not be able to understand what a stack trace means. Is every feature of the universe logically necessary? Asking for help, clarification, or responding to other answers. established by Requiring Language Standards using Compilation seems to work OK, at least for the simple "hello, world" program I tried. Connect and share knowledge within a single location that is structured and easy to search. cmake -S . C++ Why Is There "Unknown Type" When Class Header is Included? Letter of recommendation contains wrong name of journal, how will this hurt my application? If you are able to see source and set the breakpoint, then you probably have debugging symbols established. These variables are filled by CMake automatically, and CMakeLists.txt itself rare modifies them. This is simpler than specifying all the features individually, but does Not the answer you're looking for? -femit-class-debug-always. You should load only the symbol table you absolutely need. How were Acorn Archimedes used outside education? _EXTENSIONS used to default to ON. I'm compiling with the following command: Apparently the symbol "main" was not recognized, and the program did not halt at the start of the "main" function but ran to completion (in a different console window, hence no program output here). Building a static library and executable which uses CUDA and C++ with CMake and the Makefile generator. To learn more, see our tips on writing great answers. Letter of recommendation contains wrong name of journal, how will this hurt my application? While the production package is around 5Mb compressed, the unstripped version is around 70Mb and we only have 50Mb of flash space available. CMakeLists.txt also may set some of variables CMAKE__FLAGS_, if default setting for compiler is not suited for the project. Use this option if you want debug information for all symbols. Just compiling with -g3 will make the binary much bigger but the slowdown of the server should be negligible. If not set, the OUTPUT_NAME target property value or logical target name is used by default. The technical storage or access is required to create user profiles to send advertising, or to track the user on a website or across several websites for similar marketing purposes. MSVC: Microsoft Visual Studio versions 2010+. What is the idiomatic way in CMAKE to add the -fPIC compiler option? How to save a selection of features, temporary in QGIS? Why did OpenSSH create its own key format, and not use PKCS#8? By default, no debug information is produced for symbols that are not actually used. Usage. But this is not always possible, especially when you are debugging a piece of code that works with specific hardware that cant be emulated in software or is not available on your development box. As you can see, the backtrace cant display the source code level information. Next message: [CMake] Cross compiling & conflicting declarations. In the CMakeLists? The "-g -O0" options you provided should indeed let the debugger know all the symbols it needs from the executable. What is an undefined reference/unresolved external symbol error and how do I fix it? This can be requested with the code: In this example, CMake will ensure the compiler is invoked in a mode Features known to CMake are named mostly following the same convention How Intuit improves security, latency, and development velocity with a Site Maintenance - Friday, January 20, 2023 02:00 - 05:00 UTC (Thursday, Jan Were bringing advertisements for technology courses to Stack Overflow, Debug Flag With GCC (compile phase / link phase). By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Some thing must be considered: Happy Coding, or, in this case, happy debugging! How to upgrade Git on Windows to the latest version, How to link a simple program in Windows with Mingw GCC, clang on windows (installed via scoop) is unable to find headers. To configure the CMake project and generate a makefile, I used the command. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. the features, not the language standard that introduced the feature. And another update: (silly that I did not think of this before): When I compile my test program with gcc (with -g option), lldb does recognize the debugging symbols. The more important question though is why the compiler can . What is the difference between using a Makefile and CMake to compile the code? Figure 1 shows the output. In processing the requirement for the cxx_constexpr feature, cmake (1) will ensure that the in-use C++ compiler is capable of the feature, and will add any necessary flags such as -std=gnu++11 to the compile lines of C++ files in the mylib target. The second step: exclude -s from flags (-s means strip). Stopping electric arcs between layers in PCB - big PCB burn. Now, your application will start in debug Mode. implementation. ARM64 SDK or NDK in Android's case) with -DCMAKE_TOOLCHAIN_FILE flag. However, the usual sequence is: Give more specifics about what you are doing and what messages you see and we can be more specific. We use the usual strip command. For example, the GNU compiler Will all turbine blades stop moving in the event of a emergency shutdown. -std=gnu++11 if necessary. I've already finishing compiling the kernel from source, but how to compile it with debug symbols,what additional steps to I need to take? I'm trying to compile libharu with cmake and I would like to compile it with debug symbols. appropriate compile flags to use by considering the features specified Created using. generator expression to implement Why is the order of evaluation for function parameters unspecified in c++? In the side pane, choose Linker > Debugging, then select options for Generate . -DCMAKE_BUILD_TYPE=Debug. However, the usual sequence is: gcc -g -o (outputname) (source files.) In a different stackoverflow answer I found that adding compiler options "-g -O0" should do the trick, but as you can see that does not solve the problem for me. does not match the _EXTENSIONS target property, Find centralized, trusted content and collaborate around the technologies you use most. Instead, I've had success using a simple regex to replace "-O#" with an empty string before appending "-O0". Then, right-click on an executable and select Debug. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. Required fields are marked *. feature. However, I am trying to print out the value of variable using p variablename. What are possible explanations for why Democratic states appear to have higher homeless rates per capita than Republican states? is specified as a requirement. But embedded hardware is often resources constrained. What can make C++ RTTI undesirable to use? How can I make CMake use GCC instead of Clang on Mac OS X? Can I make C++ generate cmpps instruction without inline assembly? Toggle some bits and get an actual square. known feature), that may be specified with the PUBLIC or Can I change which outlet on a circuit has the GFCI reset switch? The flags will then be placed at the toolchain-defined flag position in the link command. Figure it: you have a specific chip on a i2c bus, and of course, it cant be connected on any other hardware. But the crash apparently happens in a shared library, and gdb cant find the source lines. The recipe for this is the same on both the library and executables. Instead of getting the properties one by one of of each target (or other item with properties, such as SOURCES, DIRECTORIES, TESTS, or CACHE_ENTRIES - global properties seem to be missing for some reason), you can simply list them and get them printed directly: Have you wanted to watch exactly what happens in your CMake file, and when? Open it and change the following entries to enable remote debugging: Look into the Cmake FAQ for how to get a debuggable executable. 1. the double negation really makes little sense to me, but nice to know it exists. KDevelop and GDB don't break at my breakpoints. This may be used with the build-property commands such as how to compile cmake on linux so that it can generate vsproj files? If . , and CMAKE_CXX_COMPILE_FEATURES variables contain all features There are related options as well, but they tend to bury you in output. For earlier versions of CMake, use LINK_FLAGS property instead. Is it OK to ask the professor I am applying to for a recommendation letter? 6. CMake is currently aware of the C++ standards and Solution 1: Modify the CMakeLists.txt file. The technical storage or access is necessary for the legitimate purpose of storing preferences that are not requested by the subscriber or user. The flags you can set for debug symbols can't really be equated across the platforms; e.g. You can use CMake to build binaries for ARM64 or Android target architectures. Background checks for UK/US government research jobs, and mental health difficulties. CMake adds the -std=gnu++11 flag if cxx_variadic_templates For example, installing the unstripped executables can be impossible. Nothing too spectacular here, I know. Everything can be automated into CMake at packaging time. Or, press the Run button in the toolbar. Our project binary run times are often quite affected by the -O flags so I hear quickly if something isn't working in that regard. See also policy CMP0120 and legacy documentation on to detect the features actually available. A FATAL_ERROR is issued if the compiler is not capable of the feature. Instead of emitting debugging information for a C++ class in only one object file, emit it in all object files using the class. #ifndef NDEBUG int a=1; std::cout<<a; #endif Option 2: target_compile_definitions The configuration is spelled Debug, not DEBUG.Since you should never, ever use directory-level commands (like add_compile_options), I'll show you how to use the target-level command instead: How dry does a rock/metal vocal have to be during recording? The technical storage or access is strictly necessary for the legitimate purpose of enabling the use of a specific service explicitly requested by the subscriber or user, or for the sole purpose of carrying out the transmission of a communication over an electronic communications network. The term "build type" in CMake refers to a certain build configuration such as debug and release. How to properly add include directories with CMake. This article is divided in two sections: first, onhow to automatize the creation of the debug package, then on how to load the symbol tables into gdb. Of course you need to define the Debugsym" package as usual. What is needed is to use alternative include directories Compile Feature Requirements, Optional Compile Features Since you should never, ever use directory-level commands (like add_compile_options), I'll show you how to use the target-level command instead: There's no need to use the overly generic compile options commands, either. If clang did not report any problems, then you need to turn on the warnings, I'm not convinced it is lldb. gdb. --target SomeLibrary Scanning dependencies of target SomeLibrary [ 50%] Building CXX object libraries/SomeLibrary . Why does GCC generate 15-20% faster code if I optimize for size instead of speed? How to automatically classify a sentence or text based on its context? How would I go about explaining the science of a world where everything is made of fabrics and craft supplies? such conditions. I'm not sure if that's ever going to be on the cards, since there are only so many platform-specific details CMake can abstract. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Has natural gas "reduced carbon emissions from power generation by 38%" in Ohio? compiler which supports cxx_constexpr. How can I make my class immune to the "auto value = copy of proxy" landmine in C++? How do I get the application exit code from a Windows command line? Background checks for UK/US government research jobs, and mental health difficulties. PPS: I guess this question is highly depending on particular project but is there some way to do this in general? thomthom (Thomas Thomassen) November 29, 2021, 3:01pm #1. How can I make CMake download an external package and use it? How can I make a variable always equal to the result of some calculations? as the Clang feature test macros. Cargo cult knowledge, I guess. default (see CMAKE__EXTENSIONS_DEFAULT). There are three use-cases which arise: Sometimes it may be useful to structure your project so that it can be debugged with emulators, mocks and simulated devices on a PC; it is a wise choice because emulators and mocks speed up debugging and developing when other parts (especially hardware and firmware) are not ready yet. Making statements based on opinion; back them up with references or personal experience. the feature-appropriate include directory. to show the GCC build commands as explained at: https://stackoverflow.com/questions/5820303/how-do-i-force-make-gcc-to-show-me-the-commands. How can I translate the names of the Proto-Indo-European gods and goddesses into Latin? UNIX is a registered trademark of The Open Group. Not the answer you're looking for? ELF objects are composed of sections that includes code (.text), data (.bss and .data) and debug symbols. abstract. If the compiler is unknown then CMake won't know the right flags to pass to generate debug info. In Solution Explorer, right-click the project and choose Properties. You can also start a debug session from Solution Explorer. I'm compiling with the following command: > clang -g -O0 hello.c -o hello.exe. What are possible explanations for why Democratic states appear to have higher homeless rates per capita than Republican states? There seems to be a few different ways to check how the library was built (e.g., if it was compiled /mt or /mtd) and many questions on SO about that. CMake is currently aware of the C standards 2.Start gdb alone without debugging-. Thanks for contributing an answer to Stack Overflow! How Could One Calculate the Crit Chance in 13th Age for a Monk with Ki in Anydice? The compiler creates the symbol file(s) in the same folder as the executable or the main output file. Now give the executable name along with file command i.e. I would say that changing CMAKE_BUILD_TYPE any way except for by passing directly to cmake should be avoided. This is on a different machine than I was posting from before, but it's also running Manjaro. meta-feature (e.g. The preprocessor definitions are added to the COMPILE_DEFINITIONS directory property for the current CMakeLists file. CMake already defines NDEBUG during release builds, just use that: The configuration is spelled Debug, not DEBUG. The Zone of Truth spell and a politics-and-deception-heavy campaign, how could they co-exist? "$<$:${with_variadics}>", "$<$>:${no_variadics}>". be compiled with compiler support for the If the Run button says "Select Startup Item", select the dropdown arrow and choose the target that you want to run. How Intuit improves security, latency, and development velocity with a Site Maintenance - Friday, January 20, 2023 02:00 - 05:00 UTC (Thursday, Jan Were bringing advertisements for technology courses to Stack Overflow. (If It Is At All Possible). I don't know if my step-son hates me, is scared of me, or likes me? properties: Consuming code then simply links to the foo target as usual and uses Thanks for reminding me of Cygwin. to compile it without debugging symbols . catkin_make -DCMAKE_BUILD_TYPE=Debug catkin is just a thin layer on top of CMake in this case. How To Distinguish Between Philosophy And Non-Philosophy? Third update: Cygwin / gcc does not seem to suffer from the alignment issues of Mingw. Stopping electric arcs between layers in PCB - big PCB burn, List of resources for halachot concerning celiac disease. When working with a big project on a resource constrained embedded hardware, it might be difficult to debug it properly on the target board. This will create a new ELF object with just the symbol table. Why wasn't this posted on Stack Overflow? How do I make CMake output into a 'bin' dir? Continue with Recommended Cookies. Resolving executable user stack trace addresses in ftrace, understanding .sh file terminology and cmake, How to see the number of layers currently selected in QGIS, Two parallel diagonal lines on a Schengen passport stamp, Strange fan/light switch wiring - what in the world am I looking at, How to pass duration to lilypond function, Using a Counter to Select Range, Delete, and Shift Row Up. See CMP0128. Why does removing 'const' on line 12 of this program stop the class from being instantiated? Linux is a registered trademark of Linus Torvalds. Youll not be able to work as you do on your development box, but perhaps youll be able to make some debugging. Winsock2 - How to use IOCP on client side. Can Cmake generate a single makefile that supports both debug and release. . Connect and share knowledge within a single location that is structured and easy to search. Now that both the debug and release builds are complete, we can use a custom configuration file to package both builds into a single release. I added the following to CMakeLists.txt to add -O0 and leave -g enabled: This adds the -O0 optimization to flags already used for debug by CMake and only is included for GCC builds if you happen to be using a cross platform project. In other words, what you're seeing is whatever the clang . What you want to achive doesn't make sense because you will end up having 2 targets doing basically the same, but anyway you can pass additional flags to the compiler this way (you don't say which compiler you use so I'm going to assume it's gcc): SET (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -g"). Toggle some bits and get an actual square. Generate symbol files for a C++ project. Note the section headers of the stripped sections are preserved, including their sizes, but the of the section are discarded. The only rule of thumb is to compile the library we want to debug in the developer machine, and thanks to Conan this is straightforward: conan install <reference> --build <name> --profile <debug_profile>. The CMAKE_C_KNOWN_FEATURES, CMAKE_CUDA_KNOWN_FEATURES, CMake Discourse Building Release on macOS with separate debug symbols file. If I'm correct how do I need to change my Makefile to create those. In fact, maybe a memory-analysis tool like Dr.Memory can give you what you need. g++ -g filename.cpp -o Sample. We will discuss regarding breakpoints in next article. Either set the CMAKE_CXX_FLAGS globally which applies these flags to all build types: or for more fine-grained control, use target_compile_options along with generator expressions to apply the flags per-target: As of CMake 3.2.2 there's no built-in CMake way to just specify "turn on debug flags". In order to cross-compile the TF Lite, you namely need to provide the path to the SDK (e.g. When to use unique_ptr instead of local object? Therefore, I suspect the problem is elsewhere, perhaps with your terminal, or your version/implementation of LLDB. The latest can be copied on the board when needed, and loaded into dbg. requested compiler features. Now it will start the gdb and give a prompt i.e. The crashing object is libhal.so, and the address it's loaded in is 0xb6c7d328. cxx_override_control used by Clang. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. You could have seen from what I posted that this was the case: Process 12156 launched: 'C:\Users********\Projects\clang-test\HELLO.EXE' (x86_64). C/C++: How do you set GDB debug flag (-g) with cmake? SunPro: Oracle SolarisStudio versions 12.4+. or if the _STANDARD target property is set. What do gcc preprocessed output lines of form hash sign + digit "# 1" mean?
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