no1wudi opened a new pull request, #3421:
URL: https://github.com/apache/nuttx-apps/pull/3421
## Summary
Fix the `panic_immediate_abort` compile error in Rust build system by
replacing the deprecated `-Zbuild-std-features=panic_immediate_abort` flag with
the new `-Cpanic=immediate-abort` compiler flag.
Recent Rust nightly versions have stabilized `panic_immediate_abort` as a
real panic strategy. The old method of enabling it via
`-Zbuild-std-features=panic_immediate_abort` is no longer supported and
triggers a compile error in `core/src/panicking.rs`:
```
error: panic_immediate_abort is now a real panic strategy!
Enable it with `panic = "immediate-abort"` in Cargo.toml,
or with the compiler flags `-Zunstable-options -Cpanic=immediate-abort`.
```
This change updates both CMake and Makefile build systems to use the new
approach via `RUSTFLAGS` environment variable.
## Impact
- Impact on user: NO - No user-facing changes, only fixes build with newer
Rust toolchains
- Impact on build: YES - Fixes Rust build with recent nightly compilers
- Impact on hardware: NO
- Impact on documentation: NO
- Impact on security: NO
- Impact on compatibility: YES - Maintains compatibility with both old and
new Rust versions by using the officially supported flag
## Testing
Build Host: Ubuntu 22.04, x86_64, Rust nightly 2025-03-01
Target: ARM stm32f746g-disco:nsh
Verified the fix by:
1. Enabling Rust hello example with cargo
(`CONFIG_EXAMPLES_HELLO_RUST_CARGO=y`)
2. Enabling release mode (`CONFIG_DEBUG_FULLOPT=y`)
3. Enabling TLS support (`CONFIG_TLS_NELEM=4`) required for Rust std library
4. Building successfully without the `panic_immediate_abort` error
Build output:
```
[1123/1127] Building Rust crate hello
Compiling hello v0.1.0
Finished `release` profile [optimized] target(s) in 11.34s
[1124/1127] Linking CXX executable nuttx
Memory region Used Size Region Size %age Used
flash: 126020 B 1 MB 12.02%
sram1: 5896 B 240 KB 2.40%
[1127/1127] Generating System.map
```
The firmware builds successfully and links the Rust static library without
errors.
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