toku-mac opened a new pull request, #3501:
URL: https://github.com/apache/nuttx-apps/pull/3501
## Summary
Fix the Make-based build for Rust-enabled `sim:nsh` configurations.
This change addresses two Make/Cargo issues:
### Add the missing Apple Silicon macOS Rust target mapping
When building `sim:nsh` with Make on an ARM64 macOS host, `LLVM_ARCHTYPE` is
set to `aarch64`. However, `apps/tools/Rust.mk` did not handle `aarch64` in
`RUST_TARGET_TRIPLE`, so Cargo was invoked with an empty `--target` argument:
```
error: "--target" takes a target architecture as an argument.
```
The Make build now maps this case to the same target used by the CMake Rust
helper: `aarch64-apple-darwin`
### Pass `-Zjson-target-spec` to Cargo
The Rust build uses JSON target specifications for NuttX targets such as the
simulator targets under `apps/tools/`. Cargo requires `-Zjson-target-spec` when
building with these JSON target files.
## Impact
* Impact on build: Enables building with Make/Cargo configurations.
## Testing
I confirm that changes are verified on local setup and works as intended:
* Build Host(s): OS (macOS 26.5), CPU(Apple M1), compiler(Apple clang
version 21.0.0)
* Target(s): arch(sim)
* Ensure your PATH environment variable is properly configured to allow
execution of: menuconfig, olddefconfig, savedefconfig, and setconfig.
* Use the Rust toolchain version prior to nightly-2026-04-29 to avoid errors
related to
lib/rustlib/src/rust/library/std/src/sys/net/connection/socket/unix.rs.
Configuration:
```
make distclean
./tools/configure.sh sim:nsh
make menuconfig
printf "CONFIG_SYSTEM_TIME64=y
CONFIG_FS_LARGEFILE=y
CONFIG_TLS_NELEM=16
CONFIG_DEV_URANDOM=y
CONFIG_EXAMPLES_HELLO_RUST_CARGO=y
CONFIG_EXAMPLES_HELLO_RUST_CARGO_STACKSIZE=8192
# CONFIG_COVERAGE_TOOLCHAIN is not set
CONFIG_COVERAGE_NONE=y
" >> .config
make olddefconfig
```
Testing logs before change:
```
❯ make
Create version.h
Building Rust code with cargo...
error: "--target" takes a target architecture as an argument.
Run `rustup target list` to see possible targets.
make[3]: *** [Makefile:31: context] Error 101
make[2]: *** [Makefile:57:
/Users/toku/nuttxspace/apps/examples/rust/hello_context] Error 2
make[1]: *** [Makefile:187: context] Error 2
make: *** [tools/Unix.mk:471: /Users/toku/nuttxspace/apps/.context] Error 2
```
Testing logs after change:
```
> make
...
Compiling tokio v1.52.3
Compiling hello v0.1.0 (/Users/toku/nuttxspace/apps/examples/rust/hello)
Finished `dev` profile [unoptimized + debuginfo] target(s) in 20.92s
LN: platform/board to /Users/toku/nuttxspace/apps/platform/dummy
Register: gpio
Register: hello
Register: hello_rust_cargo
Register: dd
Register: dumpstack
Register: nsh
Register: sh
Register: ostest
CP: /Users/toku/nuttxspace/nuttx/include/nuttx/config.h
CP: /Users/toku/nuttxspace/nuttx/include/nuttx/fs/hostfs.h
LD: nuttx
ld: warning: -ld_classic is deprecated and will be removed in a future
release
ld: warning: -ld_classic is deprecated and will be removed in a future
release
```
## PR verification Self-Check
* [x] My PR adheres to Contributing
[Guidelines](https://github.com/apache/nuttx/blob/master/CONTRIBUTING.md) and
[Documentation](https://nuttx.apache.org/docs/latest/contributing/index.html)
(git commit title and message, coding standard, etc).
* [x] My PR is ready for review and can be safely merged into a codebase.
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