mtriple for iphonesimulator error!

[Calvin P]

try build for iphonesimulator get this error:


ldc2 -g -gc -O0 -c -mtriple=i386-apple-ios10 
import/core/thread/fiber.d

<inline asm>:4:2: error: unknown directive
         .type   fiber_switchContext, at function
         ^
<inline asm>:22:2: error: unknown directive
         .size   fiber_switchContext, .-fiber_switchContext
         ^


what flags should I use for i386 and x86-64 iphonesimulator ?