This demo application for Armv7-R demonstrates a compilation problem in --release mode.

cargo run will work but cargo run --release gives this error:

   Compiling qemu-armv7r v0.1.0 (/Users/jonathan/Documents/ferrous-systems/qemu-armv7r)
error: <inline asm>:18:5: instruction requires: VFP2
    vmsr fpexc, r0
    ^

error: could not compile `qemu-armv7r` (bin "qemu-armv7r")

This doesn't make sense as in an eabihf target, the FPU is mandatory, and this instruction is given in the Armv7-A and Armv7-R Architecture Specification as the one to use to copy from ARM core registers to either Advanced SIMD or Floating-point Extension System Registers. Also, it works fine in debug profile?!

Licensed under either of

• Apache License, Version 2.0 (LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or https://opensource.org/licenses/MIT) at your option.

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.