arm64

问题 I get duplicate symbols error after I updated my Xcode . (find the code down) Does anybody get this too? And how could be solved? I tried to remove -ObjC linker flag from the "Other Linker Flags" section, check after imported .m instead of .h , switch the "No Common Blocks" compiler setting to NO, I went to Targets -> Build Phases -> Compile sources and no duplicates there, tried all with no results. Any other ideas? duplicate symbol _space in: /Users/a/Library/Developer/Xcode/DerivedData

问题 code is working fine on armv7 but compile for arm64 throws this "Declaration of ‘setxattr’ must be imported from module ‘Darwin.POSIX.sys.xattr’ before it is required" error. u_int8_t b = 1; setxattr([path fileSystemRepresentation], "com.apple.MobileBackup", &b, 1, 0, 0); any help plz? 回答1: I found the solution. include #include <sys/xattr.h> in the class 来源： https://stackoverflow.com/questions/34851876/declaration-of-setxattr-must-be-imported-from-module-darwin-posix-sys-xattr

问题 I already gone so many SO threads with similar issue but none of them seems to resolve my error. In our project we have multiple "TARGETS". Only one of the target - the very first target created ever - is archiving properly. When I try to archive other target we encounter this error Undefined symbols for architecture arm64: "_OBJC_CLASS_$_DynamicEventData", referenced from: objc-class-ref in DataManager.o objc-class-ref in DataReader.o "_OBJC_CLASS_$_DynamicDataService", referenced from: objc

问题 I created a C# .NET console application that can run in Windows 10 x86, x64 and ARM64 (via emulator layer). I would like to know how to detect that the application is running in those platforms. I know how to detect x86 and x64, but how to detect that the app is running inside ARM64 ? This is a snapshot of Visual Studio running into my ARM64 System. You can see that it's detected as X86 回答1: You will be able to detect the processor architecture by using System.Runtime.InteropServices

问题 Right now, I use the data returned from host_statistics64 and multiplying page counts by 4K to get the amount of memory in bytes. However, any call to get the system page size that I can think of returns 16K pages. Is there a call that will return the page size used by host_statistics64 ? Or is the page size fixed at 4K for that call? 来源： https://stackoverflow.com/questions/23801030/page-size-on-ios-arm64-returned-by-host-statistics64

问题 Right now, I use the data returned from host_statistics64 and multiplying page counts by 4K to get the amount of memory in bytes. However, any call to get the system page size that I can think of returns 16K pages. Is there a call that will return the page size used by host_statistics64 ? Or is the page size fixed at 4K for that call? 来源： https://stackoverflow.com/questions/23801030/page-size-on-ios-arm64-returned-by-host-statistics64

问题 For adding two integers, I write: int sum; asm volatile("add %0, x3, x4" : "=r"(sum) : :); How can I do this with two floats? I tried: float sum; asm volatile("fadd %0, s3, s4" : "=r"(sum) : :); But it gives me an error: Error: operand 1 should be a SIMD vector register -- `fadd x0,s3,s4' Any ideas? 回答1: ARMv7 double: %P modifier GCC devs informed me the correct undocumented modifier for ARMv7 doubles at https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89482#c4 Maybe I should stop being lazy and

问题 I used to build arm64-v8a lib of api level 19 use android.toolchain.cmake comes with Android NDK r16b like this. ${CMAKE} \ -DCMAKE_TOOLCHAIN_FILE=${TOOLCHAIN_FILE} \ -DANDROID_NDK=$ANDROID_NDK_HOME \ -DANDROID_ABI="arm64-v8a" \ -DANDROID_NATIVE_API_LEVEL="android-19" \ -DANDROID_STL="c++_shared" \ -DANDROID_CPP_FEATURES="rtti exceptions" \ .. Now i want to pack my lib use conan which cross compile android lib use standalone toolchain. Its seems to be impossible to make standalone toolchain

问题 Recently started messing with AArch64 assembly and I noticed that it has an assigned register strictly for zero , whereas (most) other architectures you would just xor var, var . The site I was reading about zr explained it as a reference point for zero which sounds a lot like how I define ground in DC electronics. And because ARM is used by hobbyists, tying ground in the circuit to zero in the code kinda makes sense to me. I'm sure it's much more complex than this, but is this a safe analogy

问题 I uploaded my app to Xcode where it says the build requires arm64. This excludes iPhones 5/5c and lower from using the app. However, I want iPhone 5/5c to be able to use the app and must have required arm64 by mistake. I think it must be something in the info.plist but have no idea. Things I have checked: (1) The info.plist does not have a RequiredDeviceCapabilities line. (2) Under Build Settings in Xcode, armv7, armv7s, and arm64 are all valid architectures. Any help you can offer would be