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help me with this issue ,it happens when running c in vs code I have everything installed code runner ,c extensions mingw 64 ;help me out
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My general advice on this front is to repeat your steps outside of your third-party IDE. That tells you whether the problem is with your IDE or with your command-line tools setup. I talk about this extensively in Investigating Third-Party IDE Integration Problems. If you run through the example from the Run a Simple Test section of that post, what do you see? IMPORTANT This uses clang, not gcc. I did that because, depending on your setup, gcc might be an alias for clang or the actual GCC C compiler. I can’t provide much help with the latter. Share and Enjoy — Quinn “The Eskimo!” @ Developer Technical Support @ Apple let myEmail = eskimo + 1 + @ + apple.com
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After upgrading to Xcode 15.3 (15E204a) trivial C++ code of mine no longer compiles: const string text = textComponent->GetText(); auto isEmpty = text.empty() || std::all_of(text.begin(), text.end(), std::isspace); now yields compiler error No matching function for call to 'all_of' while working as expected on Version 15.2 (15C500b) and older. Is there a regression in the latest Xcode update C++ support..? Thanks, Jay
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First, do read the notes on the cppreference page for isspace: https://en.cppreference.com/w/cpp/string/byte/isspace Like all other functions from , the behavior of std::isspace is undefined if the argument's value is neither representable as unsigned char nor equal to EOF. To use these functions safely with plain chars (or signed chars), the argument should first be converted to unsigned char Similarly, they should not be directly used with standard algorithms when the iterator's value type is char or signed char. Instead, convert the value to unsigned char first As to why it doesn't work, consider this: int foospace(int c) { return c == ' '; } int foospace(char c) { return c == ' '; } void foo() { const std::string text = Hello Cruel World!; auto is_empty = std::all_of(text.begin(), text.end(), foospace); } That fails, but remove either one of the overloads and it works. std::isspace in is supposed to take an int. I don't know where the other overload is coming from, nor what its argument type is. It's unfo
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Interesting! Thanks for your insights. I could fix the compiler error that starts popping up with Xcode 15.3 by switching to a lambda, i.e. auto isEmpty = text.empty() || std::all_of(text.begin(), text.end(), [](const auto& c) { return std::isspace(c); }); though I can't see any reason why the original code should stop compiling under the latest compiler version... Cheers, Jay
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Consider this: #include #include #include #include int main(int argc, const char * argv[]) { const std::string text = Hello Cruel World!; auto isEmptyNG = std::all_of(text.begin(), text.end(), std::isspace); // ^ No matching function for call to 'all_of' int (*myIsSpace)(int ch) = std::isspace; auto isEmptyOK = std::all_of(text.begin(), text.end(), myIsSpace); return 0; } Compiling with Xcode 15.3, the isEmptyNG example fails as you’ve described. OTOH the isEmptyOK works. AFAICT that’s because it ‘nails down’ the type of the predicate passed to all_of. The interesting thing is that commenting out the include of fixes the problem. At that point we’ve run off the end of my C++ Fu. It seems that something in is adding an overload on std::isspace that causes problems for the all_of template resolution, but I don’t have any great suggestions for how to proceed from there. Share and Enjoy — Quinn “The Eskimo!” @ Developer Technical Support @ Apple let myEmail = eskimo + 1 + @ + apple.com
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FWIW the required includes - algorithm, string, ctype - are all #included, and as mentioned this compiles fine in all previous Xcode versions…
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I was trying to archive iOS App. Using Xcode 15, But archiving is failing with following error Stack dump without symbol names (ensure you have llvm-symbolizer in your PATH or set the environment var `LLVM_SYMBOLIZER_PATH` to point to it): 08:42:27 0 swift-frontend 0x0000000102fadabc llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) + 56 08:42:27 1 swift-frontend 0x0000000105c13cb0 llvm::sys::RunSignalHandlers() + 112 08:42:27 2 swift-frontend 0x000000010597d054 SignalHandler(int) + 352 08:42:27 3 libsystem_platform.dylib 0x000000018b142a24 _sigtramp + 56 08:42:27 4 swift-frontend 0x000000010238a26c swift::irgen::emitWitnessTableRef(swift::irgen::IRGenFunction&, swift::CanType, llvm::Value**, swift::ProtocolConformanceRef) + 264 08:42:27 5 swift-frontend 0x000000010238a26c swift::irgen::emitWitnessTableRef(swift::irgen::IRGenFunction&, swift::CanType, llvm::Value**, swift::ProtocolConformanceRef) + 264 08:42:27 6 swift-frontend 0x0000000102390020 swift::irgen::emitGenericRequirementFromSubstitut
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I'm encountering an **error Segmentation fault: 11 ** during the archiving process. If the issue is happing with the my code. Then how can I diagnosing the problem. or figure out pin point in code base? I changed the compiler optimization level. It works for me when I use the Osize compiler optimization level. Previously, it was set to Ospeed. Want to know about the impact of the Osize compiler optimization level on the app.
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I was trying to archive iOS App. Using Xcode 15, But archiving is failing with following error Stack dump without symbol names (ensure you have llvm-symbolizer in your PATH or set the environment var `LLVM_SYMBOLIZER_PATH` to point to it): 08:42:27 0 swift-frontend 0x0000000102fadabc llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) + 56 08:42:27 1 swift-frontend 0x0000000105c13cb0 llvm::sys::RunSignalHandlers() + 112 08:42:27 2 swift-frontend 0x000000010597d054 SignalHandler(int) + 352 08:42:27 3 libsystem_platform.dylib 0x000000018b142a24 _sigtramp + 56 08:42:27 4 swift-frontend 0x000000010238a26c swift::irgen::emitWitnessTableRef(swift::irgen::IRGenFunction&, swift::CanType, llvm::Value**, swift::ProtocolConformanceRef) + 264 08:42:27 5 swift-frontend 0x000000010238a26c swift::irgen::emitWitnessTableRef(swift::irgen::IRGenFunction&, swift::CanType, llvm::Value**, swift::ProtocolConformanceRef) + 264 08:42:27 6 swift-frontend 0x0000000102390020 swift::irgen::emitGenericRequirementFromSubstitut
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Which program is crashing? Xcode itself? Or one of the tools that it sublaunches? Share and Enjoy — Quinn “The Eskimo!” @ Developer Technical Support @ Apple let myEmail = eskimo + 1 + @ + apple.com
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My goal is to have standalone assembly programs. However, when structs or data items are returned from OS calls, I want to be able to map those accurately (and painlessly) as well. What are the tricks you refer to? Writing a C program to write out equates for field offsets would technically work, but it's pretty ugly and a PITA to maintain, as it's really just magic numbers at that point. I saw in the last version of Xcode (the version that was associated with El Capitan) I could choose NASM instead of the MAC OS assembler. Should I be using NASM instead? I haven't looked to see if that's still an option in 15.2. I've perused the build options but didn't see it yet. (I'm on Ventura now). My research into the lack off support for structs/unions in the Mac OS assembler harkens of a big road block sign that says DO NOT ENTER, as without support for structures, it's really not a viable development option. I've written in assembler since 1984, but not on this platform. As a side question... I'd be up for upgrading
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Using Xcode 15.2, x86_64, and for the life of me, I can't figure out how to declare a data structure in assembly. All the currentish references I've read for Clang LLVM & as assembly have no references to data structure directives. Tons of different types of sections, but I haven't seen any that would apply. I've looked at .bss, and while I can defines different fields in it, it still reserves space in the program, and I don't need space reserved - I just need a data structure definition so I'm not using magic numbers. Perhaps there is a utility to convert a C struct to an assembly struct that I haven't seen? Surely there has to be a way to define a data structure in assembly.
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What’s with all the assembly questions today? (-: Perhaps there is a utility to convert a C struct to an assembly struct that I haven't seen? Not that I’m aware of. It kinda depends on your goal. If you want to use these structures entirely within your assembly language code, there are various tricks you can apply. However, if you want your struct to exactly match the layout of a C struct, things get a bit complex: If you’re building for the local machine, you can write a C program that outputs the assembly definitions for the various member offsets. If you’re cross compiling… hmmm… I’m not sure what you’d do in that case. Share and Enjoy — Quinn “The Eskimo!” @ Developer Technical Support @ Apple let myEmail = eskimo + 1 + @ + apple.com
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The setlocale C/C++ function writes the global variable errno to 0. In Linux it doesn't have this behavior and the documentation doesn't says anything about setting errno (as I understand, no function should set errno to 0 The following code allows to reproduce it #include #include using namespace std; int main() { ifstream myStream; myStream.open(NONEXISTENT.txt, ios::in); cout << errno << endl; setlocale(LC_ALL, en_US.UTF-8); cout << errno << endl; } // Output: // 2 // 0 I don't think is a compiler issue as the error also happens with gcc but rather a libc issue.
Ranjan_Minhas.
