armv8 64 bit architecture support in clang

Question

I'm trying to use clang to cross compile to 64 bit armv8. My clang version info is the following.

$ clang --version
Apple LLVM version 5.1 (clang-503.0.38) (based on LLVM 3.4svn)
Target: x86_64-apple-darwin13.1.0
Thread model: posix

The following work

clang -arch armv7
clang -arch arm64

But I have not been able to find how to build for armv8 64 bit, or even if it is supported.

If it is supported, how do I build for it? If it is not supported, what is the best approximation within clang?

Thanks! Damon

Sheet

In clang, "-arch arm64" means "ARMv8 AArch64" – Wildlife

@VariableLengthCoder: make that an answer. – Cursive

Answer 1

In clang, -arch arm64 means ARMv8 AArch64. That is, the 64-bit version of the ARMv8 instruction set architecture.

Wildlife

I know you are right, but can you list your sources. I'm just really tired of the obscurity behind xcode's target architectures. – Lightening

Answer 2

• ARMv8 already/is 64bit
  • arm64 ~= ARMv8 ~= AArch64
• on Mac, using clang to build for arm64:
  • clang -arch arm64 main.c -o main_arm64

Varhol