Print each argument passed from nsh with its index, and report when
the example is running on the simulator target. This makes the Rust
example demonstrate both C argv handling and target-specific output.
Signed-off-by: Shoji Tokunaga <toku@mac.com>
On the sim target (Windows/macOS/Linux), hello_rust_cargo_main() ended
with an infinite `loop {}` that never returned control to NSH, so the
example could not exit and the shell prompt hung.
Introduce a Cargo `sim` feature that is enabled only when CONFIG_ARCH_SIM
is set, and use it to compile out the trailing infinite loop and return 0
instead. Other embedded targets keep the original looping behavior.
Signed-off-by: Shoji Tokunaga <toku@mac.com>
Build Rust applictions with cargo is the most commn way,
and it's more easy to cooporate with Rust ecosystem.
This example shows how to use cargo to build a simple hello world
application.
And please notice that you need to install nighly version of rustc
to support this feature, any version after https://github.com/rust-lang/rust/pull/127755
is merged, can use NuttX as cargo target directly.
Build
-----
To build hello_rust_cargo application, you can use any target that based
on RISCV32IMAC, for example:
```
cmake -B build -DBOARD_CONFIG=rv-virt:nsh -GNinja .
```
And disable ARCH_FPU in menuconfig, since the hard coded target triple
in this demo is `riscv32imac`.
Signed-off-by: Huang Qi <huangqi3@xiaomi.com>
