error[E0658]: linking to LLVM intrinsics is experimental (see issue #29602)
  --> $DIR/issue-20313.rs:13:5
   |
LL |     fn sqrt(x: f32) -> f32; //~ ERROR linking to LLVM intrinsics is experimental
   |     ^^^^^^^^^^^^^^^^^^^^^^^
   |
   = help: add #![feature(link_llvm_intrinsics)] to the crate attributes to enable

error: aborting due to previous error

For more information about this error, try `rustc --explain E0658`.